diff --git a/backend/.env.example b/backend/.env.example
index b545de3..9c5323a 100644
--- a/backend/.env.example
+++ b/backend/.env.example
@@ -33,3 +33,15 @@ EMAIL_FROM="Canchas Padel <noreply@tudominio.com>"
 # ============================================
 RATE_LIMIT_WINDOW_MS=900000
 RATE_LIMIT_MAX_REQUESTS=100
+
+# ============================================
+# Configuración de MercadoPago (Fase 4.1)
+# ============================================
+MERCADOPAGO_ACCESS_TOKEN=TEST-0000000000000000-000000-00000000000000000000000000000000-000000000
+MERCADOPAGO_PUBLIC_KEY=TEST-00000000-0000-0000-0000-000000000000
+MERCADOPAGO_WEBHOOK_SECRET=webhook_secret_opcional_para_validar_firma
+
+# URLs de retorno (opcional - por defecto usa FRONTEND_URL)
+# MERCADOPAGO_SUCCESS_URL=http://localhost:5173/payment/success
+# MERCADOPAGO_FAILURE_URL=http://localhost:5173/payment/failure
+# MERCADOPAGO_PENDING_URL=http://localhost:5173/payment/pending
diff --git a/backend/_future/class.routes.ts b/backend/_future/class.routes.ts
new file mode 100644
index 0000000..c611daa
--- /dev/null
+++ b/backend/_future/class.routes.ts
@@ -0,0 +1,20 @@
+import { Router } from 'express';
+import { ClassController } from '../controllers/class.controller';
+import { authenticate, authorize } from '../middleware/auth';
+import { validate } from '../middleware/validate';
+import { createClassSchema, createClassBookingSchema } from '../validators/class.validator';
+
+const router = Router();
+
+// Rutas públicas
+router.get('/', ClassController.getClasses);
+router.get('/:id', ClassController.getClassById);
+router.get('/:id/sessions', ClassController.getClassBookings);
+
+// Rutas protegidas (solo coaches)
+router.post('/', authenticate, validate(createClassSchema), ClassController.createClass);
+router.put('/:id', authenticate, ClassController.updateClass);
+router.delete('/:id', authenticate, ClassController.deleteClass);
+router.post('/:id/sessions', authenticate, validate(createClassBookingSchema), ClassController.createClassBooking);
+
+export default router;
diff --git a/backend/_future/classEnrollment.controller.ts b/backend/_future/classEnrollment.controller.ts
new file mode 100644
index 0000000..7e33829
--- /dev/null
+++ b/backend/_future/classEnrollment.controller.ts
@@ -0,0 +1,103 @@
+import { Request, Response, NextFunction } from 'express';
+import { ClassEnrollmentService } from '../services/classEnrollment.service';
+import { ApiError } from '../middleware/errorHandler';
+
+export class ClassEnrollmentController {
+  // Inscribirse en una clase
+  static async enrollInClass(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const result = await ClassEnrollmentService.enrollInClass(userId, req.body);
+
+      res.status(201).json({
+        success: true,
+        message: 'Inscripción creada exitosamente',
+        data: result,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Webhook de MercadoPago
+  static async webhook(req: Request, res: Response, next: NextFunction) {
+    try {
+      // Responder inmediatamente a MP
+      res.status(200).send('OK');
+
+      // Procesar el webhook de forma asíncrona
+      await ClassEnrollmentService.processPaymentWebhook(req.body);
+    } catch (error) {
+      // Loggear error pero no enviar respuesta (ya se envió 200)
+      console.error('Error procesando webhook:', error);
+    }
+  }
+
+  // Cancelar inscripción
+  static async cancelEnrollment(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const { id } = req.params;
+      const result = await ClassEnrollmentService.cancelEnrollment(userId, id);
+
+      res.status(200).json({
+        success: true,
+        message: result.message,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Obtener mis inscripciones
+  static async getMyEnrollments(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const status = req.query.status as string | undefined;
+      const enrollments = await ClassEnrollmentService.getMyEnrollments(userId, status);
+
+      res.status(200).json({
+        success: true,
+        count: enrollments.length,
+        data: enrollments,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Obtener inscripción por ID
+  static async getEnrollmentById(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const { id } = req.params;
+      const enrollment = await ClassEnrollmentService.getEnrollmentById(id, userId);
+
+      res.status(200).json({
+        success: true,
+        data: enrollment,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Marcar asistencia (solo coach)
+  static async markAttendance(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const { id } = req.params;
+      const enrollment = await ClassEnrollmentService.markAttendance(id, userId);
+
+      res.status(200).json({
+        success: true,
+        message: 'Asistencia marcada exitosamente',
+        data: enrollment,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+}
+
+export default ClassEnrollmentController;
diff --git a/backend/_future/classEnrollment.routes.ts b/backend/_future/classEnrollment.routes.ts
new file mode 100644
index 0000000..d86d3ad
--- /dev/null
+++ b/backend/_future/classEnrollment.routes.ts
@@ -0,0 +1,19 @@
+import { Router } from 'express';
+import { ClassEnrollmentController } from '../controllers/classEnrollment.controller';
+import { authenticate, authorize } from '../middleware/auth';
+import { validate } from '../middleware/validate';
+import { enrollmentSchema } from '../validators/class.validator';
+
+const router = Router();
+
+// Webhook de MercadoPago (público)
+router.post('/webhook', ClassEnrollmentController.webhook);
+
+// Rutas protegidas
+router.post('/', authenticate, validate(enrollmentSchema), ClassEnrollmentController.enrollInClass);
+router.get('/my', authenticate, ClassEnrollmentController.getMyEnrollments);
+router.get('/:id', authenticate, ClassEnrollmentController.getEnrollmentById);
+router.delete('/:id', authenticate, ClassEnrollmentController.cancelEnrollment);
+router.put('/:id/attend', authenticate, ClassEnrollmentController.markAttendance);
+
+export default router;
diff --git a/backend/_future/coach.routes.ts b/backend/_future/coach.routes.ts
new file mode 100644
index 0000000..b34eea3
--- /dev/null
+++ b/backend/_future/coach.routes.ts
@@ -0,0 +1,29 @@
+import { Router } from 'express';
+import { CoachController } from '../controllers/coach.controller';
+import { authenticate, authorize } from '../middleware/auth';
+import { validate } from '../middleware/validate';
+import { registerCoachSchema, reviewSchema } from '../validators/class.validator';
+import { UserRole } from '../utils/constants';
+
+const router = Router();
+
+// Rutas públicas
+router.get('/', CoachController.getCoaches);
+router.get('/:id', CoachController.getCoachById);
+router.get('/:id/availability', CoachController.getAvailability);
+router.get('/:id/reviews', CoachController.getReviews);
+
+// Rutas protegidas (usuarios autenticados)
+router.post('/register', authenticate, validate(registerCoachSchema), CoachController.registerAsCoach);
+router.get('/me/profile', authenticate, CoachController.getMyProfile);
+router.put('/me', authenticate, CoachController.updateMyProfile);
+router.post('/me/availability', authenticate, CoachController.addAvailability);
+router.post('/:id/reviews', authenticate, validate(reviewSchema), CoachController.addReview);
+
+// Eliminar disponibilidad
+router.delete('/availability/:id', authenticate, CoachController.removeAvailability);
+
+// Rutas de admin
+router.put('/:id/verify', authenticate, authorize(UserRole.ADMIN, UserRole.SUPERADMIN), CoachController.verifyCoach);
+
+export default router;
diff --git a/backend/_future_services/bonusPack.service.ts b/backend/_future_services/bonusPack.service.ts
new file mode 100644
index 0000000..932fe30
--- /dev/null
+++ b/backend/_future_services/bonusPack.service.ts
@@ -0,0 +1,136 @@
+import prisma from '../config/database';
+import { ApiError } from '../middleware/errorHandler';
+import logger from '../config/logger';
+
+export interface CreateBonusPackInput {
+  name: string;
+  description?: string;
+  numberOfBookings: number;
+  price: number;
+  validityDays: number;
+}
+
+export interface UpdateBonusPackInput {
+  name?: string;
+  description?: string;
+  numberOfBookings?: number;
+  price?: number;
+  validityDays?: number;
+  isActive?: boolean;
+}
+
+export class BonusPackService {
+  // Crear un tipo de bono (admin)
+  static async createBonusPack(adminId: string, data: CreateBonusPackInput) {
+    // Validar que el precio sea positivo
+    if (data.price < 0) {
+      throw new ApiError('El precio no puede ser negativo', 400);
+    }
+
+    // Validar que la cantidad de reservas sea positiva
+    if (data.numberOfBookings <= 0) {
+      throw new ApiError('La cantidad de reservas debe ser mayor a 0', 400);
+    }
+
+    // Validar que los días de validez sean positivos
+    if (data.validityDays <= 0) {
+      throw new ApiError('Los días de validez deben ser mayor a 0', 400);
+    }
+
+    const bonusPack = await prisma.bonusPack.create({
+      data: {
+        name: data.name,
+        description: data.description,
+        numberOfBookings: data.numberOfBookings,
+        price: data.price,
+        validityDays: data.validityDays,
+        isActive: true,
+      },
+    });
+
+    logger.info(`BonusPack creado: ${bonusPack.id} por admin: ${adminId}`);
+
+    return bonusPack;
+  }
+
+  // Obtener todos los bonos activos (público)
+  static async getBonusPacks(includeInactive = false) {
+    const where = includeInactive ? {} : { isActive: true };
+
+    return prisma.bonusPack.findMany({
+      where,
+      orderBy: {
+        price: 'asc',
+      },
+    });
+  }
+
+  // Obtener un bono por ID
+  static async getBonusPackById(id: string) {
+    const bonusPack = await prisma.bonusPack.findUnique({
+      where: { id },
+    });
+
+    if (!bonusPack) {
+      throw new ApiError('Pack de bonos no encontrado', 404);
+    }
+
+    return bonusPack;
+  }
+
+  // Actualizar un tipo de bono (admin)
+  static async updateBonusPack(id: string, adminId: string, data: UpdateBonusPackInput) {
+    const bonusPack = await prisma.bonusPack.findUnique({
+      where: { id },
+    });
+
+    if (!bonusPack) {
+      throw new ApiError('Pack de bonos no encontrado', 404);
+    }
+
+    // Validaciones si se actualizan ciertos campos
+    if (data.price !== undefined && data.price < 0) {
+      throw new ApiError('El precio no puede ser negativo', 400);
+    }
+
+    if (data.numberOfBookings !== undefined && data.numberOfBookings <= 0) {
+      throw new ApiError('La cantidad de reservas debe ser mayor a 0', 400);
+    }
+
+    if (data.validityDays !== undefined && data.validityDays <= 0) {
+      throw new ApiError('Los días de validez deben ser mayor a 0', 400);
+    }
+
+    const updated = await prisma.bonusPack.update({
+      where: { id },
+      data,
+    });
+
+    logger.info(`BonusPack actualizado: ${id} por admin: ${adminId}`);
+
+    return updated;
+  }
+
+  // Eliminar (desactivar) un tipo de bono (admin)
+  static async deleteBonusPack(id: string, adminId: string) {
+    const bonusPack = await prisma.bonusPack.findUnique({
+      where: { id },
+    });
+
+    if (!bonusPack) {
+      throw new ApiError('Pack de bonos no encontrado', 404);
+    }
+
+    // Desactivar en lugar de eliminar físicamente
+    const updated = await prisma.bonusPack.update({
+      where: { id },
+      data: { isActive: false },
+    });
+
+    logger.info(`BonusPack desactivado: ${id} por admin: ${adminId}`);
+
+    return updated;
+  }
+}
+
+export default BonusPackService;
diff --git a/backend/_future_services/userBonus.service.ts b/backend/_future_services/userBonus.service.ts
new file mode 100644
index 0000000..10f1206
--- /dev/null
+++ b/backend/_future_services/userBonus.service.ts
@@ -0,0 +1,383 @@
+import prisma from '../config/database';
+import { ApiError } from '../middleware/errorHandler';
+import { UserBonusStatus, BookingStatus } from '../utils/constants';
+import logger from '../config/logger';
+
+export interface PurchaseBonusInput {
+  userId: string;
+  bonusPackId: string;
+  paymentId: string;
+}
+
+export interface UseBonusInput {
+  userId: string;
+  bookingId: string;
+}
+
+export class UserBonusService {
+  // Comprar un bono
+  static async purchaseBonus(userId: string, bonusPackId: string, paymentId: string) {
+    // Verificar que el bono exista y esté activo
+    const bonusPack = await prisma.bonusPack.findFirst({
+      where: { id: bonusPackId, isActive: true },
+    });
+
+    if (!bonusPack) {
+      throw new ApiError('Pack de bonos no encontrado o inactivo', 404);
+    }
+
+    // Calcular fechas
+    const purchaseDate = new Date();
+    const expirationDate = new Date();
+    expirationDate.setDate(expirationDate.getDate() + bonusPack.validityDays);
+
+    // Crear el bono del usuario
+    const userBonus = await prisma.userBonus.create({
+      data: {
+        userId,
+        bonusPackId,
+        totalBookings: bonusPack.numberOfBookings,
+        usedBookings: 0,
+        remainingBookings: bonusPack.numberOfBookings,
+        purchaseDate,
+        expirationDate,
+        status: UserBonusStatus.ACTIVE,
+        paymentId,
+      },
+      include: {
+        bonusPack: {
+          select: {
+            name: true,
+            numberOfBookings: true,
+            validityDays: true,
+          },
+        },
+      },
+    });
+
+    logger.info(`Bono comprado: ${userBonus.id} por usuario: ${userId}`);
+
+    return userBonus;
+  }
+
+  // Obtener mis bonos activos
+  static async getMyBonuses(userId: string, includeExpired = false) {
+    const where: any = { userId };
+    
+    if (!includeExpired) {
+      where.status = UserBonusStatus.ACTIVE;
+    }
+
+    const bonuses = await prisma.userBonus.findMany({
+      where,
+      include: {
+        bonusPack: {
+          select: {
+            name: true,
+            description: true,
+          },
+        },
+      },
+      orderBy: [
+        { expirationDate: 'asc' },
+        { createdAt: 'desc' },
+      ],
+    });
+
+    // Verificar y actualizar bonos expirados
+    const now = new Date();
+    const updatedBonuses = [];
+
+    for (const bonus of bonuses) {
+      if (bonus.status === UserBonusStatus.ACTIVE && bonus.expirationDate < now) {
+        // Actualizar a expirado
+        await prisma.userBonus.update({
+          where: { id: bonus.id },
+          data: { status: UserBonusStatus.EXPIRED },
+        });
+        bonus.status = UserBonusStatus.EXPIRED;
+      }
+      updatedBonuses.push(bonus);
+    }
+
+    return updatedBonuses;
+  }
+
+  // Obtener bono por ID (verificar que pertenezca al usuario)
+  static async getBonusById(id: string, userId: string) {
+    const bonus = await prisma.userBonus.findFirst({
+      where: { id, userId },
+      include: {
+        bonusPack: {
+          select: {
+            name: true,
+            description: true,
+            price: true,
+          },
+        },
+        usages: {
+          include: {
+            booking: {
+              select: {
+                id: true,
+                date: true,
+                startTime: true,
+                endTime: true,
+                court: {
+                  select: {
+                    name: true,
+                  },
+                },
+              },
+            },
+          },
+          orderBy: {
+            usedAt: 'desc',
+          },
+        },
+      },
+    });
+
+    if (!bonus) {
+      throw new ApiError('Bono no encontrado', 404);
+    }
+
+    // Verificar si está expirado
+    if (bonus.status === UserBonusStatus.ACTIVE && bonus.expirationDate < new Date()) {
+      await prisma.userBonus.update({
+        where: { id: bonus.id },
+        data: { status: UserBonusStatus.EXPIRED },
+      });
+      bonus.status = UserBonusStatus.EXPIRED;
+    }
+
+    return bonus;
+  }
+
+  // Usar un bono para una reserva
+  static async useBonusForBooking(userId: string, bookingId: string, userBonusId?: string) {
+    // Verificar que la reserva exista y pertenezca al usuario
+    const booking = await prisma.booking.findFirst({
+      where: { id: bookingId, userId },
+      include: {
+        court: true,
+      },
+    });
+
+    if (!booking) {
+      throw new ApiError('Reserva no encontrada', 404);
+    }
+
+    // Verificar que la reserva esté confirmada o pendiente
+    if (booking.status !== BookingStatus.PENDING && booking.status !== BookingStatus.CONFIRMED) {
+      throw new ApiError('Solo se pueden aplicar bonos a reservas pendientes o confirmadas', 400);
+    }
+
+    // Verificar que no tenga ya un bono aplicado
+    const existingUsage = await prisma.bonusUsage.findUnique({
+      where: { bookingId },
+    });
+
+    if (existingUsage) {
+      throw new ApiError('Esta reserva ya tiene un bono aplicado', 400);
+    }
+
+    // Si se especifica un bono específico, usar ese
+    let userBonus;
+    if (userBonusId) {
+      userBonus = await prisma.userBonus.findFirst({
+        where: {
+          id: userBonusId,
+          userId,
+          status: UserBonusStatus.ACTIVE,
+          remainingBookings: { gt: 0 },
+        },
+        include: {
+          bonusPack: true,
+        },
+      });
+
+      if (!userBonus) {
+        throw new ApiError('Bono no encontrado, no activo o sin reservas disponibles', 404);
+      }
+    } else {
+      // Buscar el bono activo más próximo a expirar (FIFO)
+      const now = new Date();
+      userBonus = await prisma.userBonus.findFirst({
+        where: {
+          userId,
+          status: UserBonusStatus.ACTIVE,
+          remainingBookings: { gt: 0 },
+          expirationDate: { gt: now },
+        },
+        include: {
+          bonusPack: true,
+        },
+        orderBy: {
+          expirationDate: 'asc',
+        },
+      });
+
+      if (!userBonus) {
+        throw new ApiError('No tienes bonos activos disponibles para usar', 400);
+      }
+    }
+
+    // Verificar que el bono no esté expirado
+    if (userBonus.expirationDate < new Date()) {
+      await prisma.userBonus.update({
+        where: { id: userBonus.id },
+        data: { status: UserBonusStatus.EXPIRED },
+      });
+      throw new ApiError('El bono ha expirado', 400);
+    }
+
+    // Ejecutar la transacción
+    const result = await prisma.$transaction(async (tx) => {
+      // Descontar 1 del bono
+      const newRemaining = userBonus!.remainingBookings - 1;
+      const newStatus = newRemaining === 0 ? UserBonusStatus.DEPLETED : UserBonusStatus.ACTIVE;
+
+      const updatedBonus = await tx.userBonus.update({
+        where: { id: userBonus!.id },
+        data: {
+          usedBookings: { increment: 1 },
+          remainingBookings: newRemaining,
+          status: newStatus,
+        },
+      });
+
+      // Crear registro de uso
+      const usage = await tx.bonusUsage.create({
+        data: {
+          userBonusId: userBonus!.id,
+          bookingId,
+          usedAt: new Date(),
+        },
+      });
+
+      // Actualizar la reserva (precio = 0 cuando se usa bono)
+      const updatedBooking = await tx.booking.update({
+        where: { id: bookingId },
+        data: { totalPrice: 0 },
+      });
+
+      return { updatedBonus, usage, updatedBooking };
+    });
+
+    logger.info(`Bono usado: ${userBonus.id} para booking: ${bookingId}`);
+
+    return {
+      message: 'Bono aplicado exitosamente',
+      bonusUsage: result.usage,
+      remainingBookings: result.updatedBonus.remainingBookings,
+      booking: result.updatedBooking,
+    };
+  }
+
+  // Verificar y marcar bonos expirados (para cron job)
+  static async checkExpiredBonuses() {
+    const now = new Date();
+
+    const expiredBonuses = await prisma.userBonus.findMany({
+      where: {
+        status: UserBonusStatus.ACTIVE,
+        expirationDate: { lt: now },
+      },
+    });
+
+    if (expiredBonuses.length === 0) {
+      return { count: 0, bonuses: [] };
+    }
+
+    // Actualizar todos los bonos expirados
+    const updatePromises = expiredBonuses.map((bonus) =>
+      prisma.userBonus.update({
+        where: { id: bonus.id },
+        data: { status: UserBonusStatus.EXPIRED },
+      })
+    );
+
+    await Promise.all(updatePromises);
+
+    logger.info(`${expiredBonuses.length} bonos marcados como expirados`);
+
+    return {
+      count: expiredBonuses.length,
+      bonuses: expiredBonuses.map((b) => ({
+        id: b.id,
+        userId: b.userId,
+        expirationDate: b.expirationDate,
+      })),
+    };
+  }
+
+  // Obtener historial de uso de un bono
+  static async getBonusUsageHistory(userBonusId: string, userId: string) {
+    // Verificar que el bono pertenezca al usuario
+    const bonus = await prisma.userBonus.findFirst({
+      where: { id: userBonusId, userId },
+    });
+
+    if (!bonus) {
+      throw new ApiError('Bono no encontrado', 404);
+    }
+
+    const usages = await prisma.bonusUsage.findMany({
+      where: { userBonusId },
+      include: {
+        booking: {
+          select: {
+            id: true,
+            date: true,
+            startTime: true,
+            endTime: true,
+            court: {
+              select: {
+                name: true,
+              },
+            },
+          },
+        },
+      },
+      orderBy: {
+        usedAt: 'desc',
+      },
+    });
+
+    return {
+      bonusId: userBonusId,
+      totalBookings: bonus.totalBookings,
+      usedBookings: bonus.usedBookings,
+      remainingBookings: bonus.remainingBookings,
+      usages,
+    };
+  }
+
+  // Obtener bonos disponibles para un usuario (para mostrar en checkout)
+  static async getAvailableBonuses(userId: string) {
+    const now = new Date();
+
+    return prisma.userBonus.findMany({
+      where: {
+        userId,
+        status: UserBonusStatus.ACTIVE,
+        remainingBookings: { gt: 0 },
+        expirationDate: { gt: now },
+      },
+      include: {
+        bonusPack: {
+          select: {
+            name: true,
+            description: true,
+          },
+        },
+      },
+      orderBy: {
+        expirationDate: 'asc',
+      },
+    });
+  }
+}
+
+export default UserBonusService;
diff --git a/backend/package-lock.json b/backend/package-lock.json
index 394ac31..ae5b5fd 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -17,6 +17,7 @@
         "express-rate-limit": "^7.1.5",
         "helmet": "^7.1.0",
         "jsonwebtoken": "^9.0.2",
+        "mercadopago": "^2.12.0",
         "morgan": "^1.10.0",
         "nodemailer": "^6.9.8",
         "winston": "^3.11.0",
@@ -3057,6 +3058,15 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/mercadopago": {
+      "version": "2.12.0",
+      "resolved": "https://registry.npmjs.org/mercadopago/-/mercadopago-2.12.0.tgz",
+      "integrity": "sha512-9S+ZB/Fltd4BV9/U79r7U/+LrYJP844kxxvtAlVbbeVmhOE9rZt0YhPy1GXO3Yf4XyQaHwZ/SCyL2kebAicaLw==",
+      "dependencies": {
+        "node-fetch": "^2.7.0",
+        "uuid": "^9.0.0"
+      }
+    },
     "node_modules/merge-descriptors": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/merge-descriptors/-/merge-descriptors-1.0.3.tgz",
@@ -4208,6 +4218,19 @@
         "node": ">= 0.4.0"
       }
     },
+    "node_modules/uuid": {
+      "version": "9.0.1",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-9.0.1.tgz",
+      "integrity": "sha512-b+1eJOlsR9K8HJpow9Ok3fiWOWSIcIzXodvv0rQjVoOVNpWMpxf1wZNpt4y9h10odCNrqnYp1OBzRktckBe3sA==",
+      "funding": [
+        "https://github.com/sponsors/broofa",
+        "https://github.com/sponsors/ctavan"
+      ],
+      "license": "MIT",
+      "bin": {
+        "uuid": "dist/bin/uuid"
+      }
+    },
     "node_modules/vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
diff --git a/backend/package.json b/backend/package.json
index 144d1ba..5dc4e47 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -14,7 +14,12 @@
     "lint": "eslint src --ext .ts",
     "test": "jest"
   },
-  "keywords": ["padel", "reservas", "api", "nodejs"],
+  "keywords": [
+    "padel",
+    "reservas",
+    "api",
+    "nodejs"
+  ],
   "author": "Consultoria AS",
   "license": "ISC",
   "dependencies": {
@@ -26,6 +31,7 @@
     "express-rate-limit": "^7.1.5",
     "helmet": "^7.1.0",
     "jsonwebtoken": "^9.0.2",
+    "mercadopago": "^2.12.0",
     "morgan": "^1.10.0",
     "nodemailer": "^6.9.8",
     "winston": "^3.11.0",
diff --git a/backend/prisma/dev.db b/backend/prisma/dev.db
index 437ede5..a2902c0 100644
Binary files a/backend/prisma/dev.db and b/backend/prisma/dev.db differ
diff --git a/backend/prisma/migrations/20260131084417_add_bonus_system/migration.sql b/backend/prisma/migrations/20260131084417_add_bonus_system/migration.sql
new file mode 100644
index 0000000..20cc2d3
--- /dev/null
+++ b/backend/prisma/migrations/20260131084417_add_bonus_system/migration.sql
@@ -0,0 +1,166 @@
+-- CreateTable
+CREATE TABLE "payments" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "userId" TEXT NOT NULL,
+    "type" TEXT NOT NULL,
+    "referenceId" TEXT NOT NULL,
+    "amount" INTEGER NOT NULL,
+    "currency" TEXT NOT NULL DEFAULT 'ARS',
+    "provider" TEXT NOT NULL DEFAULT 'MERCADOPAGO',
+    "providerPaymentId" TEXT,
+    "providerPreferenceId" TEXT NOT NULL,
+    "status" TEXT NOT NULL DEFAULT 'PENDING',
+    "paymentMethod" TEXT,
+    "installments" INTEGER,
+    "metadata" TEXT,
+    "paidAt" DATETIME,
+    "refundedAt" DATETIME,
+    "refundAmount" INTEGER,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" DATETIME NOT NULL,
+    CONSTRAINT "payments_userId_fkey" FOREIGN KEY ("userId") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+-- CreateTable
+CREATE TABLE "bonus_packs" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "name" TEXT NOT NULL,
+    "description" TEXT,
+    "numberOfBookings" INTEGER NOT NULL,
+    "price" INTEGER NOT NULL,
+    "validityDays" INTEGER NOT NULL,
+    "isActive" BOOLEAN NOT NULL DEFAULT true,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" DATETIME NOT NULL
+);
+
+-- CreateTable
+CREATE TABLE "user_bonuses" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "userId" TEXT NOT NULL,
+    "bonusPackId" TEXT NOT NULL,
+    "totalBookings" INTEGER NOT NULL,
+    "usedBookings" INTEGER NOT NULL DEFAULT 0,
+    "remainingBookings" INTEGER NOT NULL,
+    "purchaseDate" DATETIME NOT NULL,
+    "expirationDate" DATETIME NOT NULL,
+    "status" TEXT NOT NULL DEFAULT 'ACTIVE',
+    "paymentId" TEXT,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" DATETIME NOT NULL,
+    CONSTRAINT "user_bonuses_userId_fkey" FOREIGN KEY ("userId") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
+    CONSTRAINT "user_bonuses_bonusPackId_fkey" FOREIGN KEY ("bonusPackId") REFERENCES "bonus_packs" ("id") ON DELETE RESTRICT ON UPDATE CASCADE
+);
+
+-- CreateTable
+CREATE TABLE "bonus_usages" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "userBonusId" TEXT NOT NULL,
+    "bookingId" TEXT NOT NULL,
+    "usedAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    CONSTRAINT "bonus_usages_userBonusId_fkey" FOREIGN KEY ("userBonusId") REFERENCES "user_bonuses" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
+    CONSTRAINT "bonus_usages_bookingId_fkey" FOREIGN KEY ("bookingId") REFERENCES "bookings" ("id") ON DELETE RESTRICT ON UPDATE CASCADE
+);
+
+-- CreateTable
+CREATE TABLE "subscription_plans" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "name" TEXT NOT NULL,
+    "description" TEXT,
+    "type" TEXT NOT NULL,
+    "price" INTEGER NOT NULL,
+    "features" TEXT,
+    "benefits" TEXT NOT NULL,
+    "mercadoPagoPlanId" TEXT,
+    "isActive" BOOLEAN NOT NULL DEFAULT true,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" DATETIME NOT NULL
+);
+
+-- CreateTable
+CREATE TABLE "user_subscriptions" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "userId" TEXT NOT NULL,
+    "planId" TEXT NOT NULL,
+    "status" TEXT NOT NULL DEFAULT 'PENDING',
+    "startDate" DATETIME,
+    "endDate" DATETIME,
+    "currentPeriodStart" DATETIME,
+    "currentPeriodEnd" DATETIME,
+    "cancelAtPeriodEnd" BOOLEAN NOT NULL DEFAULT false,
+    "mercadoPagoSubscriptionId" TEXT,
+    "paymentMethodId" TEXT,
+    "lastPaymentDate" DATETIME,
+    "nextPaymentDate" DATETIME,
+    "freeBookingsUsed" INTEGER NOT NULL DEFAULT 0,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" DATETIME NOT NULL,
+    CONSTRAINT "user_subscriptions_userId_fkey" FOREIGN KEY ("userId") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
+    CONSTRAINT "user_subscriptions_planId_fkey" FOREIGN KEY ("planId") REFERENCES "subscription_plans" ("id") ON DELETE RESTRICT ON UPDATE CASCADE
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "payments_providerPreferenceId_key" ON "payments"("providerPreferenceId");
+
+-- CreateIndex
+CREATE INDEX "payments_userId_idx" ON "payments"("userId");
+
+-- CreateIndex
+CREATE INDEX "payments_status_idx" ON "payments"("status");
+
+-- CreateIndex
+CREATE INDEX "payments_type_referenceId_idx" ON "payments"("type", "referenceId");
+
+-- CreateIndex
+CREATE INDEX "payments_providerPaymentId_idx" ON "payments"("providerPaymentId");
+
+-- CreateIndex
+CREATE INDEX "payments_providerPreferenceId_idx" ON "payments"("providerPreferenceId");
+
+-- CreateIndex
+CREATE INDEX "payments_createdAt_idx" ON "payments"("createdAt");
+
+-- CreateIndex
+CREATE INDEX "bonus_packs_isActive_idx" ON "bonus_packs"("isActive");
+
+-- CreateIndex
+CREATE INDEX "user_bonuses_userId_idx" ON "user_bonuses"("userId");
+
+-- CreateIndex
+CREATE INDEX "user_bonuses_status_idx" ON "user_bonuses"("status");
+
+-- CreateIndex
+CREATE INDEX "user_bonuses_expirationDate_idx" ON "user_bonuses"("expirationDate");
+
+-- CreateIndex
+CREATE INDEX "user_bonuses_userId_status_idx" ON "user_bonuses"("userId", "status");
+
+-- CreateIndex
+CREATE INDEX "bonus_usages_userBonusId_idx" ON "bonus_usages"("userBonusId");
+
+-- CreateIndex
+CREATE INDEX "bonus_usages_usedAt_idx" ON "bonus_usages"("usedAt");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "bonus_usages_bookingId_key" ON "bonus_usages"("bookingId");
+
+-- CreateIndex
+CREATE INDEX "subscription_plans_type_idx" ON "subscription_plans"("type");
+
+-- CreateIndex
+CREATE INDEX "subscription_plans_isActive_idx" ON "subscription_plans"("isActive");
+
+-- CreateIndex
+CREATE INDEX "user_subscriptions_userId_idx" ON "user_subscriptions"("userId");
+
+-- CreateIndex
+CREATE INDEX "user_subscriptions_planId_idx" ON "user_subscriptions"("planId");
+
+-- CreateIndex
+CREATE INDEX "user_subscriptions_status_idx" ON "user_subscriptions"("status");
+
+-- CreateIndex
+CREATE INDEX "user_subscriptions_mercadoPagoSubscriptionId_idx" ON "user_subscriptions"("mercadoPagoSubscriptionId");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "user_subscriptions_userId_status_key" ON "user_subscriptions"("userId", "status");
diff --git a/backend/prisma/migrations/20260131084535_add_payment_model/migration.sql b/backend/prisma/migrations/20260131084535_add_payment_model/migration.sql
new file mode 100644
index 0000000..0a48c94
--- /dev/null
+++ b/backend/prisma/migrations/20260131084535_add_payment_model/migration.sql
@@ -0,0 +1,178 @@
+/*
+  Warnings:
+
+  - You are about to drop the `subscription_plans` table. If the table is not empty, all the data it contains will be lost.
+  - You are about to drop the `user_subscriptions` table. If the table is not empty, all the data it contains will be lost.
+
+*/
+-- DropTable
+PRAGMA foreign_keys=off;
+DROP TABLE "subscription_plans";
+PRAGMA foreign_keys=on;
+
+-- DropTable
+PRAGMA foreign_keys=off;
+DROP TABLE "user_subscriptions";
+PRAGMA foreign_keys=on;
+
+-- CreateTable
+CREATE TABLE "coaches" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "userId" TEXT NOT NULL,
+    "bio" TEXT,
+    "specialties" TEXT,
+    "certifications" TEXT,
+    "yearsExperience" INTEGER NOT NULL DEFAULT 0,
+    "hourlyRate" INTEGER NOT NULL DEFAULT 0,
+    "photoUrl" TEXT,
+    "isActive" BOOLEAN NOT NULL DEFAULT true,
+    "isVerified" BOOLEAN NOT NULL DEFAULT false,
+    "rating" REAL,
+    "reviewCount" INTEGER NOT NULL DEFAULT 0,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" DATETIME NOT NULL,
+    CONSTRAINT "coaches_userId_fkey" FOREIGN KEY ("userId") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+-- CreateTable
+CREATE TABLE "coach_availabilities" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "coachId" TEXT NOT NULL,
+    "dayOfWeek" INTEGER NOT NULL,
+    "startTime" TEXT NOT NULL,
+    "endTime" TEXT NOT NULL,
+    "isAvailable" BOOLEAN NOT NULL DEFAULT true,
+    CONSTRAINT "coach_availabilities_coachId_fkey" FOREIGN KEY ("coachId") REFERENCES "coaches" ("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+-- CreateTable
+CREATE TABLE "classes" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "coachId" TEXT NOT NULL,
+    "title" TEXT NOT NULL,
+    "description" TEXT,
+    "type" TEXT NOT NULL DEFAULT 'INDIVIDUAL',
+    "maxStudents" INTEGER NOT NULL DEFAULT 1,
+    "price" INTEGER NOT NULL DEFAULT 0,
+    "duration" INTEGER NOT NULL DEFAULT 60,
+    "levelRequired" TEXT,
+    "isActive" BOOLEAN NOT NULL DEFAULT true,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" DATETIME NOT NULL,
+    CONSTRAINT "classes_coachId_fkey" FOREIGN KEY ("coachId") REFERENCES "coaches" ("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+-- CreateTable
+CREATE TABLE "class_bookings" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "classId" TEXT NOT NULL,
+    "coachId" TEXT NOT NULL,
+    "courtId" TEXT,
+    "date" DATETIME NOT NULL,
+    "startTime" TEXT NOT NULL,
+    "students" TEXT NOT NULL DEFAULT '[]',
+    "maxStudents" INTEGER NOT NULL DEFAULT 1,
+    "enrolledStudents" INTEGER NOT NULL DEFAULT 0,
+    "status" TEXT NOT NULL DEFAULT 'AVAILABLE',
+    "price" INTEGER NOT NULL DEFAULT 0,
+    "paymentId" TEXT,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" DATETIME NOT NULL,
+    CONSTRAINT "class_bookings_classId_fkey" FOREIGN KEY ("classId") REFERENCES "classes" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
+    CONSTRAINT "class_bookings_coachId_fkey" FOREIGN KEY ("coachId") REFERENCES "coaches" ("id") ON DELETE RESTRICT ON UPDATE CASCADE,
+    CONSTRAINT "class_bookings_courtId_fkey" FOREIGN KEY ("courtId") REFERENCES "courts" ("id") ON DELETE SET NULL ON UPDATE CASCADE
+);
+
+-- CreateTable
+CREATE TABLE "student_enrollments" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "classBookingId" TEXT NOT NULL,
+    "userId" TEXT NOT NULL,
+    "paymentId" TEXT,
+    "status" TEXT NOT NULL DEFAULT 'PENDING',
+    "enrolledAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "cancelledAt" DATETIME,
+    CONSTRAINT "student_enrollments_classBookingId_fkey" FOREIGN KEY ("classBookingId") REFERENCES "class_bookings" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
+    CONSTRAINT "student_enrollments_userId_fkey" FOREIGN KEY ("userId") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+-- CreateTable
+CREATE TABLE "coach_reviews" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "coachId" TEXT NOT NULL,
+    "userId" TEXT NOT NULL,
+    "rating" INTEGER NOT NULL,
+    "comment" TEXT,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    CONSTRAINT "coach_reviews_coachId_fkey" FOREIGN KEY ("coachId") REFERENCES "coaches" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
+    CONSTRAINT "coach_reviews_userId_fkey" FOREIGN KEY ("userId") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "coaches_userId_key" ON "coaches"("userId");
+
+-- CreateIndex
+CREATE INDEX "coaches_isActive_idx" ON "coaches"("isActive");
+
+-- CreateIndex
+CREATE INDEX "coaches_isVerified_idx" ON "coaches"("isVerified");
+
+-- CreateIndex
+CREATE INDEX "coaches_userId_idx" ON "coaches"("userId");
+
+-- CreateIndex
+CREATE INDEX "coach_availabilities_coachId_idx" ON "coach_availabilities"("coachId");
+
+-- CreateIndex
+CREATE INDEX "coach_availabilities_coachId_dayOfWeek_idx" ON "coach_availabilities"("coachId", "dayOfWeek");
+
+-- CreateIndex
+CREATE INDEX "coach_availabilities_dayOfWeek_idx" ON "coach_availabilities"("dayOfWeek");
+
+-- CreateIndex
+CREATE INDEX "classes_coachId_idx" ON "classes"("coachId");
+
+-- CreateIndex
+CREATE INDEX "classes_type_idx" ON "classes"("type");
+
+-- CreateIndex
+CREATE INDEX "classes_isActive_idx" ON "classes"("isActive");
+
+-- CreateIndex
+CREATE INDEX "class_bookings_classId_idx" ON "class_bookings"("classId");
+
+-- CreateIndex
+CREATE INDEX "class_bookings_coachId_idx" ON "class_bookings"("coachId");
+
+-- CreateIndex
+CREATE INDEX "class_bookings_courtId_idx" ON "class_bookings"("courtId");
+
+-- CreateIndex
+CREATE INDEX "class_bookings_date_idx" ON "class_bookings"("date");
+
+-- CreateIndex
+CREATE INDEX "class_bookings_status_idx" ON "class_bookings"("status");
+
+-- CreateIndex
+CREATE INDEX "student_enrollments_userId_idx" ON "student_enrollments"("userId");
+
+-- CreateIndex
+CREATE INDEX "student_enrollments_status_idx" ON "student_enrollments"("status");
+
+-- CreateIndex
+CREATE INDEX "student_enrollments_classBookingId_idx" ON "student_enrollments"("classBookingId");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "student_enrollments_classBookingId_userId_key" ON "student_enrollments"("classBookingId", "userId");
+
+-- CreateIndex
+CREATE INDEX "coach_reviews_coachId_idx" ON "coach_reviews"("coachId");
+
+-- CreateIndex
+CREATE INDEX "coach_reviews_userId_idx" ON "coach_reviews"("userId");
+
+-- CreateIndex
+CREATE INDEX "coach_reviews_rating_idx" ON "coach_reviews"("rating");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "coach_reviews_coachId_userId_key" ON "coach_reviews"("coachId", "userId");
diff --git a/backend/prisma/migrations/20260131084900_add_coach_class_models/migration.sql b/backend/prisma/migrations/20260131084900_add_coach_class_models/migration.sql
new file mode 100644
index 0000000..9a25522
--- /dev/null
+++ b/backend/prisma/migrations/20260131084900_add_coach_class_models/migration.sql
@@ -0,0 +1,57 @@
+-- CreateTable
+CREATE TABLE "subscription_plans" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "name" TEXT NOT NULL,
+    "description" TEXT,
+    "type" TEXT NOT NULL,
+    "price" INTEGER NOT NULL,
+    "features" TEXT,
+    "benefits" TEXT NOT NULL,
+    "mercadoPagoPlanId" TEXT,
+    "isActive" BOOLEAN NOT NULL DEFAULT true,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" DATETIME NOT NULL
+);
+
+-- CreateTable
+CREATE TABLE "user_subscriptions" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "userId" TEXT NOT NULL,
+    "planId" TEXT NOT NULL,
+    "status" TEXT NOT NULL DEFAULT 'PENDING',
+    "startDate" DATETIME,
+    "endDate" DATETIME,
+    "currentPeriodStart" DATETIME,
+    "currentPeriodEnd" DATETIME,
+    "cancelAtPeriodEnd" BOOLEAN NOT NULL DEFAULT false,
+    "mercadoPagoSubscriptionId" TEXT,
+    "paymentMethodId" TEXT,
+    "lastPaymentDate" DATETIME,
+    "nextPaymentDate" DATETIME,
+    "freeBookingsUsed" INTEGER NOT NULL DEFAULT 0,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" DATETIME NOT NULL,
+    CONSTRAINT "user_subscriptions_userId_fkey" FOREIGN KEY ("userId") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
+    CONSTRAINT "user_subscriptions_planId_fkey" FOREIGN KEY ("planId") REFERENCES "subscription_plans" ("id") ON DELETE RESTRICT ON UPDATE CASCADE
+);
+
+-- CreateIndex
+CREATE INDEX "subscription_plans_type_idx" ON "subscription_plans"("type");
+
+-- CreateIndex
+CREATE INDEX "subscription_plans_isActive_idx" ON "subscription_plans"("isActive");
+
+-- CreateIndex
+CREATE INDEX "user_subscriptions_userId_idx" ON "user_subscriptions"("userId");
+
+-- CreateIndex
+CREATE INDEX "user_subscriptions_planId_idx" ON "user_subscriptions"("planId");
+
+-- CreateIndex
+CREATE INDEX "user_subscriptions_status_idx" ON "user_subscriptions"("status");
+
+-- CreateIndex
+CREATE INDEX "user_subscriptions_mercadoPagoSubscriptionId_idx" ON "user_subscriptions"("mercadoPagoSubscriptionId");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "user_subscriptions_userId_status_key" ON "user_subscriptions"("userId", "status");
diff --git a/backend/prisma/schema.prisma b/backend/prisma/schema.prisma
index 0ce142b..229a79a 100644
--- a/backend/prisma/schema.prisma
+++ b/backend/prisma/schema.prisma
@@ -76,6 +76,20 @@ model User {
   tournamentsCreated Tournament[] @relation("TournamentsCreated")
   tournamentParticipations TournamentParticipant[]
   
+  // Bonos (Fase 4.2)
+  userBonuses UserBonus[]
+  
+  // Pagos (Fase 4.1)
+  payments      Payment[]
+  
+  // Suscripciones (Fase 4.3)
+  subscriptions UserSubscription[]
+  
+  // Clases con profesores (Fase 4.4)
+  coach            Coach?
+  studentEnrollments StudentEnrollment[]
+  coachReviews     CoachReview[]
+  
   createdAt     DateTime  @default(now())
   updatedAt     DateTime  @updatedAt
   
@@ -132,6 +146,7 @@ model Court {
   recurringBookings RecurringBooking[]
   leagueMatches LeagueMatch[]
   tournamentMatches TournamentMatch[]
+  classBookings ClassBooking[]
   
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
@@ -193,6 +208,9 @@ model Booking {
   recurringBooking   RecurringBooking? @relation(fields: [recurringBookingId], references: [id])
   recurringBookingId String?
   
+  // Uso de bonos
+  bonusUsages BonusUsage[]
+  
   // Timestamps
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
@@ -757,3 +775,449 @@ model LeagueStanding {
   @@index([points])
   @@map("league_standings")
 }
+
+// ============================================
+// Modelo de Pagos (Fase 4.1)
+// ============================================
+
+model Payment {
+  id        String   @id @default(uuid())
+  
+  // Usuario que realiza el pago
+  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  userId    String
+  
+  // Tipo de pago: BOOKING, TOURNAMENT, BONUS, SUBSCRIPTION, CLASS
+  type      String
+  
+  // ID de la entidad relacionada (booking, tournament, etc.)
+  referenceId String
+  
+  // Monto en centavos (para evitar decimales)
+  amount    Int
+  
+  // Moneda (ARS, MXN, etc.)
+  currency  String   @default("ARS")
+  
+  // Proveedor de pago
+  provider  String   @default("MERCADOPAGO")
+  
+  // IDs de MercadoPago
+  providerPaymentId     String?  // ID del pago en MP (cuando se confirma)
+  providerPreferenceId  String   @unique  // ID de la preferencia MP
+  
+  // Estado del pago
+  status    String   @default("PENDING") // PENDING, PROCESSING, COMPLETED, FAILED, REFUNDED, CANCELLED
+  
+  // Información del método de pago
+  paymentMethod String?
+  installments  Int?      // Cantidad de cuotas
+  
+  // Metadata adicional (JSON)
+  metadata  String?
+  
+  // Fechas
+  paidAt        DateTime?
+  refundedAt    DateTime?
+  refundAmount  Int?      // Monto reembolsado en centavos
+  
+  createdAt     DateTime  @default(now())
+  updatedAt     DateTime  @updatedAt
+  
+  @@index([userId])
+  @@index([status])
+  @@index([type, referenceId])
+  @@index([providerPaymentId])
+  @@index([providerPreferenceId])
+  @@index([createdAt])
+  @@map("payments")
+}
+
+// ============================================
+// Modelos de Sistema de Bonos (Fase 4.2)
+// ============================================
+
+// Modelo de Pack de Bonos (tipos de bonos disponibles)
+model BonusPack {
+  id          String   @id @default(uuid())
+  name        String
+  description String?
+  
+  // Configuración del bono
+  numberOfBookings Int  // Cantidad de reservas incluidas
+  price            Int  // Precio del bono en centavos
+  validityDays     Int  // Días de validez desde la compra
+  
+  // Estado
+  isActive Boolean @default(true)
+  
+  // Relaciones
+  userBonuses UserBonus[]
+  
+  // Timestamps
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  
+  @@index([isActive])
+  @@map("bonus_packs")
+}
+
+// Modelo de Bono de Usuario (bonos comprados)
+model UserBonus {
+  id     String @id @default(uuid())
+  
+  // Relaciones
+  user        User      @relation(fields: [userId], references: [id], onDelete: Cascade)
+  userId      String
+  bonusPack   BonusPack @relation(fields: [bonusPackId], references: [id])
+  bonusPackId String
+  
+  // Uso del bono
+  totalBookings     Int
+  usedBookings      Int @default(0)
+  remainingBookings Int
+  
+  // Fechas
+  purchaseDate   DateTime
+  expirationDate DateTime
+  
+  // Estado: ACTIVE, EXPIRED, DEPLETED
+  status String @default("ACTIVE")
+  
+  // Referencia al pago
+  paymentId String?
+  
+  // Relaciones
+  usages BonusUsage[]
+  
+  // Timestamps
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  
+  @@index([userId])
+  @@index([status])
+  @@index([expirationDate])
+  @@index([userId, status])
+  @@map("user_bonuses")
+}
+
+// Modelo de Uso de Bono (registro de usos)
+model BonusUsage {
+  id String @id @default(uuid())
+  
+  // Relaciones
+  userBonus   UserBonus @relation(fields: [userBonusId], references: [id], onDelete: Cascade)
+  userBonusId String
+  
+  // Reserva asociada
+  booking   Booking  @relation(fields: [bookingId], references: [id])
+  bookingId String
+  
+  // Fecha de uso
+  usedAt DateTime @default(now())
+  
+  @@unique([bookingId])
+  @@index([userBonusId])
+  @@index([usedAt])
+  @@map("bonus_usages")
+}
+
+// ============================================
+// Modelos de Sistema de Suscripciones (Fase 4.3)
+// ============================================
+
+// Modelo de Plan de Suscripción (planes disponibles)
+model SubscriptionPlan {
+  id          String   @id @default(uuid())
+  name        String
+  description String?
+  
+  // Tipo de plan
+  type String // MONTHLY, QUARTERLY, YEARLY
+  
+  // Precio en centavos
+  price Int
+  
+  // Características (JSON array de strings)
+  features String? // Ej: ["Reservas ilimitadas", "Prioridad en reservas"]
+  
+  // Beneficios del plan (almacenados como JSON)
+  // discountPercentage: porcentaje de descuento en reservas
+  // freeBookingsPerMonth: cantidad de reservas gratis por mes
+  // priorityBooking: prioridad en reservas
+  // tournamentDiscount: descuento en torneos
+  benefits String // JSON: { discountPercentage, freeBookingsPerMonth, priorityBooking, tournamentDiscount }
+  
+  // ID del plan en MercadoPago
+  mercadoPagoPlanId String?
+  
+  // Estado
+  isActive Boolean @default(true)
+  
+  // Relaciones
+  subscriptions UserSubscription[]
+  
+  // Timestamps
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  
+  @@index([type])
+  @@index([isActive])
+  @@map("subscription_plans")
+}
+
+// Modelo de Suscripción de Usuario
+model UserSubscription {
+  id     String @id @default(uuid())
+  
+  // Usuario
+  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)
+  userId String
+  
+  // Plan
+  plan   SubscriptionPlan @relation(fields: [planId], references: [id])
+  planId String
+  
+  // Estado: PENDING, ACTIVE, PAUSED, CANCELLED, EXPIRED
+  status String @default("PENDING")
+  
+  // Fechas de suscripción
+  startDate DateTime?
+  endDate   DateTime?
+  
+  // Período actual
+  currentPeriodStart DateTime?
+  currentPeriodEnd   DateTime?
+  
+  // Cancelar al final del período
+  cancelAtPeriodEnd Boolean @default(false)
+  
+  // Referencia a MercadoPago
+  mercadoPagoSubscriptionId String?
+  
+  // Método de pago vinculado
+  paymentMethodId String?
+  
+  // Fechas de pagos
+  lastPaymentDate DateTime?
+  nextPaymentDate DateTime?
+  
+  // Contador de reservas gratis usadas en el período actual
+  freeBookingsUsed Int @default(0)
+  
+  // Timestamps
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  
+  @@unique([userId, status])
+  @@index([userId])
+  @@index([planId])
+  @@index([status])
+  @@index([mercadoPagoSubscriptionId])
+  @@map("user_subscriptions")
+}
+
+// ============================================
+// Modelos de Clases con Profesores (Fase 4.4)
+// ============================================
+
+// Modelo de Profesor (Coach)
+model Coach {
+  id        String   @id @default(uuid())
+
+  // Relación con usuario
+  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  userId    String   @unique
+
+  // Perfil profesional
+  bio               String?
+  specialties       String?  // JSON array de especialidades
+  certifications    String?  // JSON array de certificaciones
+  yearsExperience   Int      @default(0)
+  hourlyRate        Int      @default(0)  // en centavos
+  photoUrl          String?
+
+  // Estado
+  isActive    Boolean @default(true)
+  isVerified  Boolean @default(false)
+
+  // Calificaciones
+  rating      Float?
+  reviewCount Int     @default(0)
+
+  // Relaciones
+  availabilities  CoachAvailability[]
+  classes         Class[]
+  classBookings   ClassBooking[]
+  coachReviews    CoachReview[]
+
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  @@index([isActive])
+  @@index([isVerified])
+  @@index([userId])
+  @@map("coaches")
+}
+
+// Modelo de Disponibilidad del Coach
+model CoachAvailability {
+  id    String @id @default(uuid())
+
+  // Relación con coach
+  coach   Coach  @relation(fields: [coachId], references: [id], onDelete: Cascade)
+  coachId String
+
+  // Día de la semana (0=Domingo, 1=Lunes, ..., 6=Sábado)
+  dayOfWeek Int
+
+  // Horario
+  startTime String
+  endTime   String
+
+  // Estado
+  isAvailable Boolean @default(true)
+
+  @@index([coachId])
+  @@index([coachId, dayOfWeek])
+  @@index([dayOfWeek])
+  @@map("coach_availabilities")
+}
+
+// Modelo de Clase (programa/tipo de clase)
+model Class {
+  id          String @id @default(uuid())
+
+  // Relación con coach
+  coach   Coach  @relation(fields: [coachId], references: [id], onDelete: Cascade)
+  coachId String
+
+  // Información de la clase
+  title       String
+  description String?
+
+  // Tipo: INDIVIDUAL, GROUP, CLINIC
+  type String @default("INDIVIDUAL")
+
+  // Configuración
+  maxStudents Int     @default(1)  // Máximo de alumnos
+  price       Int     @default(0)  // Precio por persona en centavos
+  duration    Int     @default(60) // Duración en minutos
+
+  // Nivel mínimo requerido
+  levelRequired String?
+
+  // Estado
+  isActive Boolean @default(true)
+
+  // Relaciones
+  sessions ClassBooking[]
+
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  @@index([coachId])
+  @@index([type])
+  @@index([isActive])
+  @@map("classes")
+}
+
+// Modelo de Sesión de Clase (instancia específica de una clase)
+model ClassBooking {
+  id     String @id @default(uuid())
+
+  // Relaciones
+  class   Class  @relation(fields: [classId], references: [id], onDelete: Cascade)
+  classId String
+
+  coach   Coach  @relation(fields: [coachId], references: [id])
+  coachId String
+
+  court   Court? @relation(fields: [courtId], references: [id], onDelete: SetNull)
+  courtId String?
+
+  // Fecha y hora
+  date      DateTime
+  startTime String
+
+  // Estudiantes (JSON array de userIds)
+  students String @default("[]")
+
+  // Cupo
+  maxStudents      Int @default(1)
+  enrolledStudents Int @default(0)
+
+  // Estado: AVAILABLE, FULL, COMPLETED, CANCELLED
+  status String @default("AVAILABLE")
+
+  // Precio
+  price Int @default(0)
+
+  // Pago
+  paymentId String?
+
+  // Relaciones
+  enrollments StudentEnrollment[]
+
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  @@index([classId])
+  @@index([coachId])
+  @@index([courtId])
+  @@index([date])
+  @@index([status])
+  @@map("class_bookings")
+}
+
+// Modelo de Inscripción de Estudiante
+model StudentEnrollment {
+  id String @id @default(uuid())
+
+  // Relaciones
+  classBooking   ClassBooking @relation(fields: [classBookingId], references: [id], onDelete: Cascade)
+  classBookingId String
+
+  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)
+  userId String
+
+  // Referencia al pago
+  paymentId String?
+
+  // Estado: PENDING, CONFIRMED, CANCELLED, ATTENDED
+  status String @default("PENDING")
+
+  // Timestamps
+  enrolledAt   DateTime  @default(now())
+  cancelledAt  DateTime?
+
+  @@unique([classBookingId, userId])
+  @@index([userId])
+  @@index([status])
+  @@index([classBookingId])
+  @@map("student_enrollments")
+}
+
+// Modelo de Reseña de Coach
+model CoachReview {
+  id String @id @default(uuid())
+
+  // Relaciones
+  coach   Coach  @relation(fields: [coachId], references: [id], onDelete: Cascade)
+  coachId String
+
+  user   User   @relation(fields: [userId], references: [id], onDelete: Cascade)
+  userId String
+
+  // Calificación (1-5)
+  rating  Int
+  comment String?
+
+  createdAt DateTime @default(now())
+
+  @@unique([coachId, userId])
+  @@index([coachId])
+  @@index([userId])
+  @@index([rating])
+  @@map("coach_reviews")
+}
diff --git a/backend/prisma/seed-fase4.ts b/backend/prisma/seed-fase4.ts
new file mode 100644
index 0000000..4731e44
--- /dev/null
+++ b/backend/prisma/seed-fase4.ts
@@ -0,0 +1,159 @@
+import { PrismaClient } from '@prisma/client';
+
+const prisma = new PrismaClient();
+
+async function main() {
+  console.log('🌱 Seeding Fase 4 - Pagos y Monetización...\n');
+
+  const admin = await prisma.user.findUnique({ where: { email: 'admin@padel.com' } });
+  const user = await prisma.user.findUnique({ where: { email: 'user@padel.com' } });
+  
+  if (!admin || !user) {
+    console.log('❌ Usuarios no encontrados. Ejecuta seed.ts primero.');
+    return;
+  }
+
+  // Crear Bonus Packs
+  const bonusPacks = [
+    { name: 'Pack 5 Clases', bookings: 5, price: 9000, validity: 90 },
+    { name: 'Pack 10 Clases', bookings: 10, price: 16000, validity: 180 },
+    { name: 'Pack Mensual', bookings: 30, price: 40000, validity: 30 },
+  ];
+
+  for (const pack of bonusPacks) {
+    await prisma.bonusPack.upsert({
+      where: { id: `bonus-${pack.bookings}` },
+      update: {},
+      create: {
+        id: `bonus-${pack.bookings}`,
+        name: pack.name,
+        description: `${pack.bookings} reservas de 1 hora cada una`,
+        numberOfBookings: pack.bookings,
+        price: pack.price,
+        validityDays: pack.validity,
+        isActive: true,
+      },
+    });
+    console.log(`✅ Bonus Pack creado: ${pack.name}`);
+  }
+
+  // Crear planes de suscripción
+  const plans = [
+    { 
+      name: 'Básico', 
+      type: 'MONTHLY', 
+      price: 15000, 
+      benefits: { discountPercentage: 10, freeBookingsPerMonth: 2, priorityBooking: false, tournamentDiscount: 5 },
+      desc: '10% off en reservas, 2 reservas gratis/mes'
+    },
+    { 
+      name: 'Premium', 
+      type: 'MONTHLY', 
+      price: 25000, 
+      benefits: { discountPercentage: 20, freeBookingsPerMonth: 5, priorityBooking: true, tournamentDiscount: 10 },
+      desc: '20% off en reservas, 5 reservas gratis/mes, prioridad'
+    },
+    { 
+      name: 'Anual VIP', 
+      type: 'YEARLY', 
+      price: 250000, 
+      benefits: { discountPercentage: 30, freeBookingsPerMonth: 10, priorityBooking: true, tournamentDiscount: 15 },
+      desc: '30% off en reservas, 10 reservas gratis/mes'
+    },
+  ];
+
+  for (const plan of plans) {
+    await prisma.subscriptionPlan.upsert({
+      where: { id: `plan-${plan.name.toLowerCase().replace(/ /g, '-')}` },
+      update: {},
+      create: {
+        id: `plan-${plan.name.toLowerCase().replace(/ /g, '-')}`,
+        name: plan.name,
+        description: plan.desc,
+        type: plan.type,
+        price: plan.price,
+        benefits: JSON.stringify(plan.benefits),
+        features: JSON.stringify([`${plan.benefits.discountPercentage}% descuento`, `${plan.benefits.freeBookingsPerMonth} reservas gratis`, plan.benefits.priorityBooking ? 'Prioridad de reserva' : 'Sin prioridad']),
+        isActive: true,
+      },
+    });
+    console.log(`✅ Plan de suscripción creado: ${plan.name}`);
+  }
+
+  // Registrar usuario como coach
+  const coach = await prisma.coach.upsert({
+    where: { id: 'coach-1' },
+    update: {},
+    create: {
+      id: 'coach-1',
+      userId: admin.id,
+      bio: 'Profesor de pádel con 10 años de experiencia. Especialista en técnica y táctica.',
+      specialties: JSON.stringify(['Técnica', 'Táctica', 'Volea', 'Smash']),
+      certifications: 'Entrenador Nacional Nivel 3',
+      yearsExperience: 10,
+      hourlyRate: 5000,
+      isActive: true,
+      isVerified: true,
+    },
+  });
+  console.log(`✅ Coach creado: ${coach.id}`);
+
+  // Crear disponibilidad del coach
+  for (let day = 1; day <= 5; day++) { // Lunes a Viernes
+    await prisma.coachAvailability.upsert({
+      where: { id: `avail-${coach.id}-${day}` },
+      update: {},
+      create: {
+        id: `avail-${coach.id}-${day}`,
+        coachId: coach.id,
+        dayOfWeek: day,
+        startTime: '09:00',
+        endTime: '18:00',
+        isAvailable: true,
+      },
+    });
+  }
+  console.log('✅ Disponibilidad del coach creada');
+
+  // Crear clases
+  const classes = [
+    { name: 'Clase Individual', type: 'INDIVIDUAL', max: 1, price: 5000, duration: 60 },
+    { name: 'Clase en Pareja', type: 'GROUP', max: 2, price: 3500, duration: 60 },
+    { name: 'Clínica de Volea', type: 'CLINIC', max: 8, price: 2000, duration: 90 },
+  ];
+
+  for (const cls of classes) {
+    await prisma.class.upsert({
+      where: { id: `class-${cls.name.toLowerCase().replace(/ /g, '-')}` },
+      update: {},
+      create: {
+        id: `class-${cls.name.toLowerCase().replace(/ /g, '-')}`,
+        coachId: coach.id,
+        title: cls.name,
+        description: `Clase especializada de ${cls.name.toLowerCase()}`,
+        type: cls.type,
+        maxStudents: cls.max,
+        price: cls.price,
+        duration: cls.duration,
+        isActive: true,
+      },
+    });
+    console.log(`✅ Clase creada: ${cls.name}`);
+  }
+
+  console.log('\n🎾 Fase 4 seed completado!');
+  console.log('\nDatos creados:');
+  console.log(`  - 3 Bonus Packs`);
+  console.log(`  - 3 Planes de suscripción`);
+  console.log(`  - 1 Coach verificado`);
+  console.log(`  - 3 Clases disponibles`);
+}
+
+main()
+  .catch((e) => {
+    console.error(e);
+    process.exit(1);
+  })
+  .finally(async () => {
+    await prisma.$disconnect();
+  });
diff --git a/backend/src/config/index.ts b/backend/src/config/index.ts
index 8734cb5..4b9a01b 100644
--- a/backend/src/config/index.ts
+++ b/backend/src/config/index.ts
@@ -43,6 +43,17 @@ export const config = {
     WINDOW_MS: parseInt(process.env.RATE_LIMIT_WINDOW_MS || '900000', 10),
     MAX_REQUESTS: parseInt(process.env.RATE_LIMIT_MAX_REQUESTS || '100', 10),
   },
+  
+  // MercadoPago
+  MERCADOPAGO: {
+    ACCESS_TOKEN: process.env.MERCADOPAGO_ACCESS_TOKEN || '',
+    PUBLIC_KEY: process.env.MERCADOPAGO_PUBLIC_KEY || '',
+    WEBHOOK_SECRET: process.env.MERCADOPAGO_WEBHOOK_SECRET || '',
+    // URLs de retorno (se pueden sobreescribir con variables de entorno)
+    SUCCESS_URL: process.env.MERCADOPAGO_SUCCESS_URL || '',
+    FAILURE_URL: process.env.MERCADOPAGO_FAILURE_URL || '',
+    PENDING_URL: process.env.MERCADOPAGO_PENDING_URL || '',
+  },
 };
 
 export default config;
diff --git a/backend/src/config/mercadopago.ts b/backend/src/config/mercadopago.ts
new file mode 100644
index 0000000..11709a3
--- /dev/null
+++ b/backend/src/config/mercadopago.ts
@@ -0,0 +1,30 @@
+import { MercadoPagoConfig, Preference, Payment as MPPayment } from 'mercadopago';
+import config from './index';
+import logger from './logger';
+
+// Determinar si estamos en modo sandbox
+const isSandbox = config.NODE_ENV !== 'production';
+
+// Configuración del cliente de MercadoPago
+const mpConfig = new MercadoPagoConfig({
+  accessToken: config.MERCADOPAGO.ACCESS_TOKEN,
+  options: {
+    timeout: 30000, // 30 segundos
+    idempotencyKey: `padel-${Date.now()}`,
+  },
+});
+
+// Clientes específicos
+export const preferenceClient = new Preference(mpConfig);
+export const paymentClient = new MPPayment(mpConfig);
+
+// Helper para verificar si la configuración es válida
+export const isMercadoPagoConfigured = (): boolean => {
+  return !!config.MERCADOPAGO.ACCESS_TOKEN && config.MERCADOPAGO.ACCESS_TOKEN.length > 0;
+};
+
+// Log de configuración (sin exponer credenciales completas)
+logger.info(`MercadoPago configurado - Modo: ${isSandbox ? 'sandbox' : 'producción'}`);
+logger.info(`MercadoPago Access Token configurado: ${isMercadoPagoConfigured() ? 'Sí' : 'No'}`);
+
+export default mpConfig;
diff --git a/backend/src/controllers/booking.controller.ts b/backend/src/controllers/booking.controller.ts
index 100adc3..b9dbabe 100644
--- a/backend/src/controllers/booking.controller.ts
+++ b/backend/src/controllers/booking.controller.ts
@@ -159,6 +159,35 @@ export class BookingController {
       next(error);
     }
   }
+  
+  // Calcular precio con beneficios de suscripción
+  static async calculatePrice(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+      
+      const { courtId, startTime, endTime } = req.query;
+      
+      if (!courtId || !startTime || !endTime) {
+        throw new ApiError('Faltan parámetros: courtId, startTime, endTime', 400);
+      }
+      
+      const priceInfo = await BookingService.calculatePriceWithBenefits(
+        req.user.userId,
+        courtId as string,
+        startTime as string,
+        endTime as string
+      );
+      
+      res.status(200).json({
+        success: true,
+        data: priceInfo,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
 }
 
 export default BookingController;
diff --git a/backend/src/controllers/class.controller.ts b/backend/src/controllers/class.controller.ts
new file mode 100644
index 0000000..9485103
--- /dev/null
+++ b/backend/src/controllers/class.controller.ts
@@ -0,0 +1,136 @@
+import { Request, Response, NextFunction } from 'express';
+import { ClassService } from '../services/class.service';
+import { ApiError } from '../middleware/errorHandler';
+
+export class ClassController {
+  // Crear clase
+  static async createClass(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const classItem = await ClassService.createClass(userId, req.body);
+
+      res.status(201).json({
+        success: true,
+        message: 'Clase creada exitosamente',
+        data: classItem,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Listar clases
+  static async getClasses(req: Request, res: Response, next: NextFunction) {
+    try {
+      const filters = {
+        coachId: req.query.coachId as string | undefined,
+        type: req.query.type as string | undefined,
+        isActive: req.query.isActive === 'true' ? true :
+                  req.query.isActive === 'false' ? false : undefined,
+        minPrice: req.query.minPrice ? parseInt(req.query.minPrice as string) : undefined,
+        maxPrice: req.query.maxPrice ? parseInt(req.query.maxPrice as string) : undefined,
+        levelRequired: req.query.levelRequired as string | undefined,
+        search: req.query.search as string | undefined,
+      };
+
+      const classes = await ClassService.getClasses(filters);
+
+      res.status(200).json({
+        success: true,
+        count: classes.length,
+        data: classes,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Obtener clase por ID
+  static async getClassById(req: Request, res: Response, next: NextFunction) {
+    try {
+      const { id } = req.params;
+      const classItem = await ClassService.getClassById(id);
+
+      res.status(200).json({
+        success: true,
+        data: classItem,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Actualizar clase
+  static async updateClass(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const { id } = req.params;
+      const classItem = await ClassService.updateClass(id, userId, req.body);
+
+      res.status(200).json({
+        success: true,
+        message: 'Clase actualizada exitosamente',
+        data: classItem,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Eliminar clase
+  static async deleteClass(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const { id } = req.params;
+      await ClassService.deleteClass(id, userId);
+
+      res.status(200).json({
+        success: true,
+        message: 'Clase eliminada exitosamente',
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Programar sesión de clase
+  static async createClassBooking(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const { id } = req.params;
+      
+      const data = {
+        ...req.body,
+        classId: id,
+      };
+
+      const session = await ClassService.createClassBooking(userId, data);
+
+      res.status(201).json({
+        success: true,
+        message: 'Sesión programada exitosamente',
+        data: session,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Obtener sesiones de una clase
+  static async getClassBookings(req: Request, res: Response, next: NextFunction) {
+    try {
+      const { id } = req.params;
+      const sessions = await ClassService.getClassBookings(id);
+
+      res.status(200).json({
+        success: true,
+        count: sessions.length,
+        data: sessions,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+}
+
+export default ClassController;
diff --git a/backend/src/controllers/classEnrollment.controller.ts b/backend/src/controllers/classEnrollment.controller.ts
new file mode 100644
index 0000000..7e33829
--- /dev/null
+++ b/backend/src/controllers/classEnrollment.controller.ts
@@ -0,0 +1,103 @@
+import { Request, Response, NextFunction } from 'express';
+import { ClassEnrollmentService } from '../services/classEnrollment.service';
+import { ApiError } from '../middleware/errorHandler';
+
+export class ClassEnrollmentController {
+  // Inscribirse en una clase
+  static async enrollInClass(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const result = await ClassEnrollmentService.enrollInClass(userId, req.body);
+
+      res.status(201).json({
+        success: true,
+        message: 'Inscripción creada exitosamente',
+        data: result,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Webhook de MercadoPago
+  static async webhook(req: Request, res: Response, next: NextFunction) {
+    try {
+      // Responder inmediatamente a MP
+      res.status(200).send('OK');
+
+      // Procesar el webhook de forma asíncrona
+      await ClassEnrollmentService.processPaymentWebhook(req.body);
+    } catch (error) {
+      // Loggear error pero no enviar respuesta (ya se envió 200)
+      console.error('Error procesando webhook:', error);
+    }
+  }
+
+  // Cancelar inscripción
+  static async cancelEnrollment(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const { id } = req.params;
+      const result = await ClassEnrollmentService.cancelEnrollment(userId, id);
+
+      res.status(200).json({
+        success: true,
+        message: result.message,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Obtener mis inscripciones
+  static async getMyEnrollments(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const status = req.query.status as string | undefined;
+      const enrollments = await ClassEnrollmentService.getMyEnrollments(userId, status);
+
+      res.status(200).json({
+        success: true,
+        count: enrollments.length,
+        data: enrollments,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Obtener inscripción por ID
+  static async getEnrollmentById(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const { id } = req.params;
+      const enrollment = await ClassEnrollmentService.getEnrollmentById(id, userId);
+
+      res.status(200).json({
+        success: true,
+        data: enrollment,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Marcar asistencia (solo coach)
+  static async markAttendance(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const { id } = req.params;
+      const enrollment = await ClassEnrollmentService.markAttendance(id, userId);
+
+      res.status(200).json({
+        success: true,
+        message: 'Asistencia marcada exitosamente',
+        data: enrollment,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+}
+
+export default ClassEnrollmentController;
diff --git a/backend/src/controllers/coach.controller.ts b/backend/src/controllers/coach.controller.ts
new file mode 100644
index 0000000..2656298
--- /dev/null
+++ b/backend/src/controllers/coach.controller.ts
@@ -0,0 +1,203 @@
+import { Request, Response, NextFunction } from 'express';
+import { CoachService } from '../services/coach.service';
+import { ApiError } from '../middleware/errorHandler';
+
+export class CoachController {
+  // Registrarse como coach
+  static async registerAsCoach(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const coach = await CoachService.registerAsCoach(userId, req.body);
+
+      res.status(201).json({
+        success: true,
+        message: 'Solicitud de registro como coach enviada exitosamente',
+        data: coach,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Listar coaches
+  static async getCoaches(req: Request, res: Response, next: NextFunction) {
+    try {
+      const filters = {
+        isActive: req.query.isActive === 'true' ? true : 
+                  req.query.isActive === 'false' ? false : undefined,
+        isVerified: req.query.isVerified === 'true' ? true :
+                    req.query.isVerified === 'false' ? false : undefined,
+        minRating: req.query.minRating ? parseFloat(req.query.minRating as string) : undefined,
+        specialty: req.query.specialty as string | undefined,
+        search: req.query.search as string | undefined,
+      };
+
+      const coaches = await CoachService.getCoaches(filters);
+
+      res.status(200).json({
+        success: true,
+        count: coaches.length,
+        data: coaches,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Obtener coach por ID
+  static async getCoachById(req: Request, res: Response, next: NextFunction) {
+    try {
+      const { id } = req.params;
+      const coach = await CoachService.getCoachById(id);
+
+      res.status(200).json({
+        success: true,
+        data: coach,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Obtener mi perfil de coach
+  static async getMyProfile(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const coach = await CoachService.getMyCoachProfile(userId);
+
+      res.status(200).json({
+        success: true,
+        data: coach,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Actualizar mi perfil de coach
+  static async updateMyProfile(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const coach = await CoachService.updateCoachProfile(userId, req.body);
+
+      res.status(200).json({
+        success: true,
+        message: 'Perfil de coach actualizado exitosamente',
+        data: coach,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Verificar coach (admin)
+  static async verifyCoach(req: Request, res: Response, next: NextFunction) {
+    try {
+      const { id } = req.params;
+      const adminId = req.user!.userId;
+      const coach = await CoachService.verifyCoach(id, adminId);
+
+      res.status(200).json({
+        success: true,
+        message: 'Coach verificado exitosamente',
+        data: coach,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Agregar disponibilidad
+  static async addAvailability(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const availability = await CoachService.addAvailability(userId, req.body);
+
+      res.status(201).json({
+        success: true,
+        message: 'Horario agregado exitosamente',
+        data: availability,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Eliminar disponibilidad
+  static async removeAvailability(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const { id } = req.params;
+      await CoachService.removeAvailability(userId, id);
+
+      res.status(200).json({
+        success: true,
+        message: 'Horario eliminado exitosamente',
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Obtener disponibilidad de un coach
+  static async getAvailability(req: Request, res: Response, next: NextFunction) {
+    try {
+      const { id } = req.params;
+      const { date } = req.query;
+
+      let parsedDate: Date | undefined;
+      if (date && typeof date === 'string') {
+        parsedDate = new Date(date);
+        if (isNaN(parsedDate.getTime())) {
+          throw new ApiError('Fecha inválida', 400);
+        }
+      }
+
+      const availability = await CoachService.getAvailability(id, parsedDate);
+
+      res.status(200).json({
+        success: true,
+        data: availability,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Agregar reseña
+  static async addReview(req: Request, res: Response, next: NextFunction) {
+    try {
+      const userId = req.user!.userId;
+      const { id } = req.params;
+      const review = await CoachService.addReview(userId, id, req.body);
+
+      res.status(201).json({
+        success: true,
+        message: 'Reseña agregada exitosamente',
+        data: review,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Obtener reseñas de un coach
+  static async getReviews(req: Request, res: Response, next: NextFunction) {
+    try {
+      const { id } = req.params;
+      const page = req.query.page ? parseInt(req.query.page as string) : 1;
+      const limit = req.query.limit ? parseInt(req.query.limit as string) : 10;
+
+      const reviews = await CoachService.getReviews(id, page, limit);
+
+      res.status(200).json({
+        success: true,
+        data: reviews,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+}
+
+export default CoachController;
diff --git a/backend/src/controllers/payment.controller.ts b/backend/src/controllers/payment.controller.ts
new file mode 100644
index 0000000..cde0fc9
--- /dev/null
+++ b/backend/src/controllers/payment.controller.ts
@@ -0,0 +1,193 @@
+import { Request, Response, NextFunction } from 'express';
+import PaymentService from '../services/payment.service';
+import { ApiError } from '../middleware/errorHandler';
+import { UserRole } from '../utils/constants';
+
+export class PaymentController {
+  /**
+   * Crear preferencia de pago
+   * POST /payments/preference
+   */
+  static async createPreference(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const { type, referenceId, title, description, amount, callbackUrl, metadata } = req.body;
+
+      const result = await PaymentService.createPreference(req.user.userId, {
+        type,
+        referenceId,
+        title,
+        description,
+        amount,
+        callbackUrl,
+        metadata,
+      });
+
+      res.status(201).json({
+        success: true,
+        message: 'Preferencia de pago creada exitosamente',
+        data: {
+          preferenceId: result.id,
+          paymentId: result.paymentId,
+          initPoint: result.initPoint,
+          sandboxInitPoint: result.sandboxInitPoint,
+        },
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  /**
+   * Obtener estado de un pago
+   * GET /payments/:id/status
+   */
+  static async getPaymentStatus(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const { id } = req.params;
+      const payment = await PaymentService.getPaymentStatus(id);
+
+      // Verificar que el usuario tiene acceso a este pago
+      if (payment.user.id !== req.user.userId && req.user.role !== UserRole.ADMIN && req.user.role !== UserRole.SUPERADMIN) {
+        throw new ApiError('No tienes permisos para ver este pago', 403);
+      }
+
+      res.status(200).json({
+        success: true,
+        data: payment,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  /**
+   * Procesar webhook de MercadoPago
+   * POST /payments/webhook
+   * Público - no requiere autenticación
+   */
+  static async processWebhook(req: Request, res: Response, next: NextFunction) {
+    try {
+      // Responder inmediatamente a MP para evitar reintentos
+      res.status(200).json({ success: true });
+
+      // Procesar el webhook de forma asíncrona
+      const payload = req.body;
+      
+      // Validar que hay datos
+      if (!payload || Object.keys(payload).length === 0) {
+        return;
+      }
+
+      await PaymentService.processWebhook(payload);
+    } catch (error) {
+      // Log error pero no enviar respuesta (ya enviamos 200)
+      console.error('Error procesando webhook:', error);
+    }
+  }
+
+  /**
+   * Obtener mis pagos
+   * GET /payments/my-payments
+   */
+  static async getMyPayments(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const payments = await PaymentService.getUserPayments(req.user.userId);
+
+      res.status(200).json({
+        success: true,
+        data: payments,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  /**
+   * Obtener detalle de un pago por ID
+   * GET /payments/:id
+   */
+  static async getPaymentById(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const { id } = req.params;
+      const payment = await PaymentService.getPaymentById(id);
+
+      // Verificar que el usuario tiene acceso a este pago
+      if (payment.userId !== req.user.userId && req.user.role !== UserRole.ADMIN && req.user.role !== UserRole.SUPERADMIN) {
+        throw new ApiError('No tienes permisos para ver este pago', 403);
+      }
+
+      res.status(200).json({
+        success: true,
+        data: payment,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  /**
+   * Reembolsar un pago (solo admin)
+   * POST /payments/:id/refund
+   */
+  static async refundPayment(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const { id } = req.params;
+      const { amount } = req.body;
+
+      const result = await PaymentService.refundPayment(id, amount);
+
+      res.status(200).json({
+        success: true,
+        message: 'Pago reembolsado exitosamente',
+        data: result,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  /**
+   * Cancelar un pago pendiente
+   * POST /payments/:id/cancel
+   */
+  static async cancelPayment(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const { id } = req.params;
+      const result = await PaymentService.cancelPayment(id, req.user.userId);
+
+      res.status(200).json({
+        success: true,
+        message: 'Pago cancelado exitosamente',
+        data: result,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+}
+
+export default PaymentController;
diff --git a/backend/src/controllers/subscription.controller.ts b/backend/src/controllers/subscription.controller.ts
new file mode 100644
index 0000000..4f45d5f
--- /dev/null
+++ b/backend/src/controllers/subscription.controller.ts
@@ -0,0 +1,198 @@
+import { Request, Response, NextFunction } from 'express';
+import { SubscriptionService } from '../services/subscription.service';
+import { ApiError } from '../middleware/errorHandler';
+
+export class SubscriptionController {
+  // Crear una nueva suscripción
+  static async createSubscription(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const { planId, paymentMethodId } = req.body;
+
+      const result = await SubscriptionService.createSubscription(
+        req.user.userId,
+        planId,
+        paymentMethodId
+      );
+
+      res.status(201).json({
+        success: true,
+        message: 'Suscripción creada exitosamente. Complete el pago para activarla.',
+        data: result,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Procesar webhook de MercadoPago
+  static async processWebhook(req: Request, res: Response, next: NextFunction) {
+    try {
+      const result = await SubscriptionService.processWebhook(req.body);
+
+      // Responder inmediatamente a MP
+      res.status(200).json({
+        success: true,
+        processed: result.processed,
+      });
+    } catch (error) {
+      // Loggear el error pero responder 200 para que MP no reintente
+      console.error('Error procesando webhook:', error);
+      res.status(200).json({
+        success: false,
+        message: 'Error procesando webhook',
+      });
+    }
+  }
+
+  // Obtener mi suscripción actual
+  static async getMySubscription(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const subscription = await SubscriptionService.getMySubscription(req.user.userId);
+
+      if (!subscription) {
+        return res.status(200).json({
+          success: true,
+          data: null,
+          message: 'No tienes una suscripción activa',
+        });
+      }
+
+      res.status(200).json({
+        success: true,
+        data: subscription,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Obtener suscripción por ID
+  static async getSubscriptionById(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const { id } = req.params;
+      const subscription = await SubscriptionService.getSubscriptionById(id, req.user.userId);
+
+      res.status(200).json({
+        success: true,
+        data: subscription,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Cancelar suscripción (al final del período)
+  static async cancelSubscription(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const { id } = req.params;
+      const subscription = await SubscriptionService.cancelSubscription(id, req.user.userId);
+
+      res.status(200).json({
+        success: true,
+        message: 'Suscripción cancelada. Seguirá activa hasta el final del período actual.',
+        data: subscription,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Pausar suscripción
+  static async pauseSubscription(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const { id } = req.params;
+      const subscription = await SubscriptionService.pauseSubscription(id, req.user.userId);
+
+      res.status(200).json({
+        success: true,
+        message: 'Suscripción pausada exitosamente',
+        data: subscription,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Reanudar suscripción
+  static async resumeSubscription(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const { id } = req.params;
+      const subscription = await SubscriptionService.resumeSubscription(id, req.user.userId);
+
+      res.status(200).json({
+        success: true,
+        message: 'Suscripción reanudada exitosamente',
+        data: subscription,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Actualizar método de pago
+  static async updatePaymentMethod(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const { paymentMethodId } = req.body;
+      const subscription = await SubscriptionService.updatePaymentMethod(
+        req.user.userId,
+        paymentMethodId
+      );
+
+      res.status(200).json({
+        success: true,
+        message: 'Método de pago actualizado exitosamente',
+        data: subscription,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Obtener mis beneficios actuales
+  static async getMyBenefits(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const benefits = await SubscriptionService.getCurrentBenefits(req.user.userId);
+
+      res.status(200).json({
+        success: true,
+        data: benefits,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+}
+
+export default SubscriptionController;
diff --git a/backend/src/controllers/subscriptionPlan.controller.ts b/backend/src/controllers/subscriptionPlan.controller.ts
new file mode 100644
index 0000000..26c9fa9
--- /dev/null
+++ b/backend/src/controllers/subscriptionPlan.controller.ts
@@ -0,0 +1,135 @@
+import { Request, Response, NextFunction } from 'express';
+import { SubscriptionPlanService } from '../services/subscriptionPlan.service';
+import { ApiError } from '../middleware/errorHandler';
+
+export class SubscriptionPlanController {
+  // Crear un nuevo plan de suscripción (admin)
+  static async createPlan(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const plan = await SubscriptionPlanService.createPlan(req.user.userId, req.body);
+
+      res.status(201).json({
+        success: true,
+        message: 'Plan de suscripción creado exitosamente',
+        data: plan,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Obtener todos los planes activos
+  static async getPlans(req: Request, res: Response, next: NextFunction) {
+    try {
+      const plans = await SubscriptionPlanService.getPlans();
+
+      res.status(200).json({
+        success: true,
+        count: plans.length,
+        data: plans,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Obtener todos los planes (incluyendo inactivos) - admin
+  static async getAllPlans(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const plans = await SubscriptionPlanService.getAllPlans(req.user.userId);
+
+      res.status(200).json({
+        success: true,
+        count: plans.length,
+        data: plans,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Obtener plan por ID
+  static async getPlanById(req: Request, res: Response, next: NextFunction) {
+    try {
+      const { id } = req.params;
+      const plan = await SubscriptionPlanService.getPlanById(id);
+
+      res.status(200).json({
+        success: true,
+        data: plan,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Actualizar plan (admin)
+  static async updatePlan(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const { id } = req.params;
+      const plan = await SubscriptionPlanService.updatePlan(id, req.user.userId, req.body);
+
+      res.status(200).json({
+        success: true,
+        message: 'Plan de suscripción actualizado exitosamente',
+        data: plan,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Eliminar (desactivar) plan (admin)
+  static async deletePlan(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const { id } = req.params;
+      const plan = await SubscriptionPlanService.deletePlan(id, req.user.userId);
+
+      res.status(200).json({
+        success: true,
+        message: 'Plan de suscripción desactivado exitosamente',
+        data: plan,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  // Sincronizar plan con MercadoPago (admin)
+  static async syncPlanWithMP(req: Request, res: Response, next: NextFunction) {
+    try {
+      if (!req.user) {
+        throw new ApiError('No autenticado', 401);
+      }
+
+      const { id } = req.params;
+      const plan = await SubscriptionPlanService.syncPlanWithMP(id, req.user.userId);
+
+      res.status(200).json({
+        success: true,
+        message: 'Plan sincronizado con MercadoPago exitosamente',
+        data: plan,
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+}
+
+export default SubscriptionPlanController;
diff --git a/backend/src/routes/booking.routes.ts b/backend/src/routes/booking.routes.ts
index 6f77449..3fd22ce 100644
--- a/backend/src/routes/booking.routes.ts
+++ b/backend/src/routes/booking.routes.ts
@@ -25,6 +25,7 @@ const updateBookingSchema = z.object({
 // Rutas protegidas para usuarios autenticados
 router.post('/', authenticate, validate(createBookingSchema), BookingController.createBooking);
 router.get('/my-bookings', authenticate, BookingController.getMyBookings);
+router.get('/price-preview', authenticate, BookingController.calculatePrice);
 router.get('/:id', authenticate, BookingController.getBookingById);
 router.put('/:id', authenticate, validate(updateBookingSchema), BookingController.updateBooking);
 router.delete('/:id', authenticate, BookingController.cancelBooking);
diff --git a/backend/src/routes/class.routes.ts b/backend/src/routes/class.routes.ts
new file mode 100644
index 0000000..e28b8f0
--- /dev/null
+++ b/backend/src/routes/class.routes.ts
@@ -0,0 +1,20 @@
+import { Router } from 'express';
+import { ClassController } from '../controllers/class.controller';
+import { authenticate } from '../middleware/auth';
+import { validate } from '../middleware/validate';
+import { createClassSchema, createClassBookingSchema } from '../validators/class.validator';
+
+const router = Router();
+
+// Rutas públicas
+router.get('/', ClassController.getClasses);
+router.get('/:id', ClassController.getClassById);
+router.get('/:id/sessions', ClassController.getClassBookings);
+
+// Rutas protegidas (solo coaches)
+router.post('/', authenticate, validate(createClassSchema), ClassController.createClass);
+router.put('/:id', authenticate, ClassController.updateClass);
+router.delete('/:id', authenticate, ClassController.deleteClass);
+router.post('/:id/sessions', authenticate, validate(createClassBookingSchema), ClassController.createClassBooking);
+
+export default router;
diff --git a/backend/src/routes/classEnrollment.routes.ts b/backend/src/routes/classEnrollment.routes.ts
new file mode 100644
index 0000000..bb37d9d
--- /dev/null
+++ b/backend/src/routes/classEnrollment.routes.ts
@@ -0,0 +1,19 @@
+import { Router } from 'express';
+import { ClassEnrollmentController } from '../controllers/classEnrollment.controller';
+import { authenticate } from '../middleware/auth';
+import { validate } from '../middleware/validate';
+import { enrollmentSchema } from '../validators/class.validator';
+
+const router = Router();
+
+// Webhook de MercadoPago (público)
+router.post('/webhook', ClassEnrollmentController.webhook);
+
+// Rutas protegidas
+router.post('/', authenticate, validate(enrollmentSchema), ClassEnrollmentController.enrollInClass);
+router.get('/my', authenticate, ClassEnrollmentController.getMyEnrollments);
+router.get('/:id', authenticate, ClassEnrollmentController.getEnrollmentById);
+router.delete('/:id', authenticate, ClassEnrollmentController.cancelEnrollment);
+router.put('/:id/attend', authenticate, ClassEnrollmentController.markAttendance);
+
+export default router;
diff --git a/backend/src/routes/coach.routes.ts b/backend/src/routes/coach.routes.ts
new file mode 100644
index 0000000..b34eea3
--- /dev/null
+++ b/backend/src/routes/coach.routes.ts
@@ -0,0 +1,29 @@
+import { Router } from 'express';
+import { CoachController } from '../controllers/coach.controller';
+import { authenticate, authorize } from '../middleware/auth';
+import { validate } from '../middleware/validate';
+import { registerCoachSchema, reviewSchema } from '../validators/class.validator';
+import { UserRole } from '../utils/constants';
+
+const router = Router();
+
+// Rutas públicas
+router.get('/', CoachController.getCoaches);
+router.get('/:id', CoachController.getCoachById);
+router.get('/:id/availability', CoachController.getAvailability);
+router.get('/:id/reviews', CoachController.getReviews);
+
+// Rutas protegidas (usuarios autenticados)
+router.post('/register', authenticate, validate(registerCoachSchema), CoachController.registerAsCoach);
+router.get('/me/profile', authenticate, CoachController.getMyProfile);
+router.put('/me', authenticate, CoachController.updateMyProfile);
+router.post('/me/availability', authenticate, CoachController.addAvailability);
+router.post('/:id/reviews', authenticate, validate(reviewSchema), CoachController.addReview);
+
+// Eliminar disponibilidad
+router.delete('/availability/:id', authenticate, CoachController.removeAvailability);
+
+// Rutas de admin
+router.put('/:id/verify', authenticate, authorize(UserRole.ADMIN, UserRole.SUPERADMIN), CoachController.verifyCoach);
+
+export default router;
diff --git a/backend/src/routes/index.ts b/backend/src/routes/index.ts
index 8d64e8b..ca47fee 100644
--- a/backend/src/routes/index.ts
+++ b/backend/src/routes/index.ts
@@ -16,6 +16,12 @@ import leagueScheduleRoutes from './leagueSchedule.routes';
 import leagueStandingRoutes from './leagueStanding.routes';
 import leagueMatchRoutes from './leagueMatch.routes';
 
+// Rutas de Pagos (Fase 4.1)
+import paymentRoutes from './payment.routes';
+
+// Rutas de Sistema de Bonos (Fase 4.2) - Desactivado temporalmente
+// import bonusRoutes from './bonus.routes';
+
 const router = Router();
 
 // Health check
@@ -73,4 +79,40 @@ router.use('/league-standings', leagueStandingRoutes);
 // Rutas de partidos de liga
 router.use('/league-matches', leagueMatchRoutes);
 
+// ============================================
+// Rutas de Pagos (Fase 4.1)
+// ============================================
+
+router.use('/payments', paymentRoutes);
+
+// ============================================
+// Rutas de Sistema de Bonos (Fase 4.2) - Desactivado temporalmente
+// ============================================
+
+// router.use('/', bonusRoutes);
+
+// ============================================
+// Rutas de Suscripciones/Membresías (Fase 4.3)
+// ============================================
+
+import subscriptionRoutes from './subscription.routes';
+router.use('/', subscriptionRoutes);
+
+// ============================================
+// Rutas de Clases con Profesores (Fase 4.4) - Desactivado temporalmente
+// ============================================
+
+// import coachRoutes from './coach.routes';
+// import classRoutes from './class.routes';
+// import classEnrollmentRoutes from './classEnrollment.routes';
+
+// Rutas de coaches
+// router.use('/coaches', coachRoutes);
+
+// Rutas de clases
+// router.use('/classes', classRoutes);
+
+// Rutas de inscripciones a clases
+// router.use('/class-enrollments', classEnrollmentRoutes);
+
 export default router;
diff --git a/backend/src/routes/payment.routes.ts b/backend/src/routes/payment.routes.ts
new file mode 100644
index 0000000..bc6d3e5
--- /dev/null
+++ b/backend/src/routes/payment.routes.ts
@@ -0,0 +1,66 @@
+import { Router } from 'express';
+import { PaymentController } from '../controllers/payment.controller';
+import { validate, validateParams } from '../middleware/validate';
+import { authenticate, authorize } from '../middleware/auth';
+import { UserRole } from '../utils/constants';
+import { createPreferenceSchema, refundSchema, paymentIdParamSchema } from '../validators/payment.validator';
+
+const router = Router();
+
+// POST /payments/preference - Crear preferencia de pago (auth)
+router.post(
+  '/preference',
+  authenticate,
+  validate(createPreferenceSchema),
+  PaymentController.createPreference
+);
+
+// GET /payments/my-payments - Mis pagos (auth)
+router.get(
+  '/my-payments',
+  authenticate,
+  PaymentController.getMyPayments
+);
+
+// GET /payments/:id - Ver detalle de pago (auth)
+router.get(
+  '/:id',
+  authenticate,
+  validateParams(paymentIdParamSchema),
+  PaymentController.getPaymentById
+);
+
+// GET /payments/:id/status - Ver estado de pago (auth)
+router.get(
+  '/:id/status',
+  authenticate,
+  validateParams(paymentIdParamSchema),
+  PaymentController.getPaymentStatus
+);
+
+// POST /payments/webhook - Webhook de MercadoPago (público)
+// Sin autenticación para recibir notificaciones de MP
+router.post(
+  '/webhook',
+  PaymentController.processWebhook
+);
+
+// POST /payments/:id/refund - Reembolsar pago (admin)
+router.post(
+  '/:id/refund',
+  authenticate,
+  authorize(UserRole.ADMIN, UserRole.SUPERADMIN),
+  validateParams(paymentIdParamSchema),
+  validate(refundSchema),
+  PaymentController.refundPayment
+);
+
+// POST /payments/:id/cancel - Cancelar pago pendiente (auth)
+router.post(
+  '/:id/cancel',
+  authenticate,
+  validateParams(paymentIdParamSchema),
+  PaymentController.cancelPayment
+);
+
+export default router;
diff --git a/backend/src/routes/subscription.routes.ts b/backend/src/routes/subscription.routes.ts
new file mode 100644
index 0000000..d92c537
--- /dev/null
+++ b/backend/src/routes/subscription.routes.ts
@@ -0,0 +1,136 @@
+import { Router } from 'express';
+import { SubscriptionPlanController } from '../controllers/subscriptionPlan.controller';
+import { SubscriptionController } from '../controllers/subscription.controller';
+import { authenticate, authorize } from '../middleware/auth';
+import { validate } from '../middleware/validate';
+import { UserRole } from '../utils/constants';
+import {
+  createPlanSchema,
+  updatePlanSchema,
+  createSubscriptionSchema,
+  updatePaymentMethodSchema,
+} from '../validators/subscription.validator';
+
+const router = Router();
+
+// ============================================
+// Rutas de Planes de Suscripción (públicas/admin)
+// ============================================
+
+// Listar planes activos (público)
+router.get('/subscription-plans', SubscriptionPlanController.getPlans);
+
+// Ver plan específico (público)
+router.get('/subscription-plans/:id', SubscriptionPlanController.getPlanById);
+
+// Crear plan (admin)
+router.post(
+  '/subscription-plans',
+  authenticate,
+  authorize(UserRole.ADMIN, UserRole.SUPERADMIN),
+  validate(createPlanSchema),
+  SubscriptionPlanController.createPlan
+);
+
+// Listar todos los planes incluyendo inactivos (admin)
+router.get(
+  '/subscription-plans/all',
+  authenticate,
+  authorize(UserRole.ADMIN, UserRole.SUPERADMIN),
+  SubscriptionPlanController.getAllPlans
+);
+
+// Actualizar plan (admin)
+router.put(
+  '/subscription-plans/:id',
+  authenticate,
+  authorize(UserRole.ADMIN, UserRole.SUPERADMIN),
+  validate(updatePlanSchema),
+  SubscriptionPlanController.updatePlan
+);
+
+// Eliminar (desactivar) plan (admin)
+router.delete(
+  '/subscription-plans/:id',
+  authenticate,
+  authorize(UserRole.ADMIN, UserRole.SUPERADMIN),
+  SubscriptionPlanController.deletePlan
+);
+
+// Sincronizar plan con MercadoPago (admin)
+router.post(
+  '/subscription-plans/:id/sync-mp',
+  authenticate,
+  authorize(UserRole.ADMIN, UserRole.SUPERADMIN),
+  SubscriptionPlanController.syncPlanWithMP
+);
+
+// ============================================
+// Rutas de Suscripciones de Usuario (auth)
+// ============================================
+
+// Crear suscripción
+router.post(
+  '/subscriptions',
+  authenticate,
+  validate(createSubscriptionSchema),
+  SubscriptionController.createSubscription
+);
+
+// Obtener mi suscripción actual
+router.get(
+  '/subscriptions/my-subscription',
+  authenticate,
+  SubscriptionController.getMySubscription
+);
+
+// Ver mis beneficios actuales
+router.get(
+  '/subscriptions/benefits',
+  authenticate,
+  SubscriptionController.getMyBenefits
+);
+
+// Obtener suscripción por ID
+router.get(
+  '/subscriptions/:id',
+  authenticate,
+  SubscriptionController.getSubscriptionById
+);
+
+// Cancelar suscripción (al final del período)
+router.put(
+  '/subscriptions/:id/cancel',
+  authenticate,
+  SubscriptionController.cancelSubscription
+);
+
+// Pausar suscripción
+router.put(
+  '/subscriptions/:id/pause',
+  authenticate,
+  SubscriptionController.pauseSubscription
+);
+
+// Reanudar suscripción
+router.put(
+  '/subscriptions/:id/resume',
+  authenticate,
+  SubscriptionController.resumeSubscription
+);
+
+// Actualizar método de pago
+router.put(
+  '/subscriptions/payment-method',
+  authenticate,
+  validate(updatePaymentMethodSchema),
+  SubscriptionController.updatePaymentMethod
+);
+
+// Webhook de MercadoPago (público, sin autenticación)
+router.post(
+  '/subscriptions/webhook',
+  SubscriptionController.processWebhook
+);
+
+export default router;
diff --git a/backend/src/services/booking.service.ts b/backend/src/services/booking.service.ts
index 51f27e9..46ba9a4 100644
--- a/backend/src/services/booking.service.ts
+++ b/backend/src/services/booking.service.ts
@@ -3,6 +3,7 @@ import { ApiError } from '../middleware/errorHandler';
 import { BookingStatus } from '../utils/constants';
 import { sendBookingConfirmation, sendBookingCancellation } from './email.service';
 import logger from '../config/logger';
+import { SubscriptionService } from './subscription.service';
 
 export interface CreateBookingInput {
   userId: string;
@@ -87,11 +88,47 @@ export class BookingService {
       throw new ApiError('La cancha no está disponible en ese horario', 409);
     }
     
-    // Calcular precio (precio por hora * número de horas)
+    // Calcular precio base (precio por hora * número de horas)
     const startHour = parseInt(data.startTime.split(':')[0]);
     const endHour = parseInt(data.endTime.split(':')[0]);
     const hours = endHour - startHour;
-    const totalPrice = court.pricePerHour * hours;
+    const basePrice = court.pricePerHour * hours;
+    
+    // Verificar y aplicar beneficios de suscripción
+    let finalPrice = basePrice;
+    let discountApplied = 0;
+    let usedFreeBooking = false;
+    
+    // TODO: Re-activar cuando se implemente Fase 4.3 (Suscripciones)
+    /*
+    try {
+      const benefits = await SubscriptionService.checkAndApplyBenefits(
+        data.userId,
+        {
+          totalPrice: basePrice,
+          courtId: data.courtId,
+          date: data.date,
+          startTime: data.startTime,
+          endTime: data.endTime,
+        }
+      );
+      
+      finalPrice = benefits.finalPrice;
+      discountApplied = benefits.discountApplied;
+      usedFreeBooking = benefits.usedFreeBooking;
+      
+      if (discountApplied > 0) {
+        logger.info(`Descuento aplicado a reserva: ${discountApplied} centavos para usuario ${data.userId}`);
+      }
+      if (usedFreeBooking) {
+        logger.info(`Reserva gratis aplicada para usuario ${data.userId}`);
+      }
+    } catch (error) {
+      logger.error('Error aplicando beneficios de suscripción:', error);
+      // Continuar con precio normal si falla la aplicación de beneficios
+    }
+    */
+    // Fin TODO Fase 4.3
     
     // Crear la reserva
     const booking = await prisma.booking.create({
@@ -102,7 +139,7 @@ export class BookingService {
         startTime: data.startTime,
         endTime: data.endTime,
         status: BookingStatus.PENDING,
-        totalPrice,
+        totalPrice: finalPrice,
         notes: data.notes,
       },
       include: {
@@ -135,7 +172,16 @@ export class BookingService {
       // No fallar la reserva si el email falla
     }
     
-    return booking;
+    // Retornar reserva con información de beneficios aplicados
+    return {
+      ...booking,
+      benefitsApplied: {
+        basePrice,
+        discountApplied,
+        usedFreeBooking,
+        finalPrice,
+      },
+    };
   }
   
   // Obtener todas las reservas (con filtros)
@@ -348,6 +394,51 @@ export class BookingService {
       },
     });
   }
+  
+  // Calcular precio con beneficios de suscripción (preview)
+  static async calculatePriceWithBenefits(
+    userId: string,
+    courtId: string,
+    startTime: string,
+    endTime: string
+  ) {
+    // Obtener información de la cancha
+    const court = await prisma.court.findUnique({
+      where: { id: courtId },
+    });
+    
+    if (!court) {
+      throw new ApiError('Cancha no encontrada', 404);
+    }
+    
+    // Calcular precio base
+    const startHour = parseInt(startTime.split(':')[0]);
+    const endHour = parseInt(endTime.split(':')[0]);
+    const hours = endHour - startHour;
+    const basePrice = court.pricePerHour * hours;
+    
+    // Obtener beneficios de suscripción
+    const subscriptionBenefits = await SubscriptionService.getCurrentBenefits(userId);
+    
+    // Calcular precio final
+    let finalPrice = basePrice;
+    let discountApplied = 0;
+    
+    if (subscriptionBenefits.freeBookingsRemaining > 0) {
+      finalPrice = 0;
+      discountApplied = basePrice;
+    } else if (subscriptionBenefits.discountPercentage > 0) {
+      discountApplied = Math.round((basePrice * subscriptionBenefits.discountPercentage) / 100);
+      finalPrice = basePrice - discountApplied;
+    }
+    
+    return {
+      basePrice,
+      finalPrice,
+      discountApplied,
+      subscriptionBenefits,
+    };
+  }
 }
 
 export default BookingService;
diff --git a/backend/src/services/class.service.ts b/backend/src/services/class.service.ts
new file mode 100644
index 0000000..9515898
--- /dev/null
+++ b/backend/src/services/class.service.ts
@@ -0,0 +1,594 @@
+import prisma from '../config/database';
+import { ApiError } from '../middleware/errorHandler';
+import { ClassType, ClassBookingStatus, ClassLimits } from '../utils/constants';
+
+export interface CreateClassInput {
+  title: string;
+  description?: string;
+  type: string;
+  maxStudents?: number;
+  price: number;
+  duration?: number;
+  levelRequired?: string;
+}
+
+export interface UpdateClassInput {
+  title?: string;
+  description?: string;
+  type?: string;
+  maxStudents?: number;
+  price?: number;
+  duration?: number;
+  levelRequired?: string;
+  isActive?: boolean;
+}
+
+export interface CreateClassBookingInput {
+  classId: string;
+  courtId?: string;
+  date: Date;
+  startTime: string;
+  price?: number;
+}
+
+export interface ClassFilters {
+  coachId?: string;
+  type?: string;
+  isActive?: boolean;
+  minPrice?: number;
+  maxPrice?: number;
+  levelRequired?: string;
+  search?: string;
+}
+
+export class ClassService {
+  // Crear una clase
+  static async createClass(coachUserId: string, data: CreateClassInput) {
+    // Verificar que el usuario es coach
+    const coach = await prisma.coach.findUnique({
+      where: { userId: coachUserId },
+    });
+
+    if (!coach) {
+      throw new ApiError('No tienes perfil de coach', 403);
+    }
+
+    if (!coach.isVerified) {
+      throw new ApiError('Debes estar verificado para crear clases', 403);
+    }
+
+    // Validar tipo de clase
+    if (!Object.values(ClassType).includes(data.type as any)) {
+      throw new ApiError(`Tipo de clase inválido. Opciones: ${Object.values(ClassType).join(', ')}`, 400);
+    }
+
+    // Validar y ajustar maxStudents según el tipo
+    const limits = ClassLimits[data.type as keyof typeof ClassLimits];
+    let maxStudents = data.maxStudents || limits.max;
+    
+    if (maxStudents < limits.min || maxStudents > limits.max) {
+      throw new ApiError(
+        `Para clases ${data.type}, el cupo debe estar entre ${limits.min} y ${limits.max} alumnos`,
+        400
+      );
+    }
+
+    // Validar precio
+    if (data.price < 0) {
+      throw new ApiError('El precio no puede ser negativo', 400);
+    }
+
+    // Validar duración
+    const duration = data.duration || 60;
+    if (duration < 30 || duration > 180) {
+      throw new ApiError('La duración debe estar entre 30 y 180 minutos', 400);
+    }
+
+    return prisma.class.create({
+      data: {
+        coachId: coach.id,
+        title: data.title,
+        description: data.description,
+        type: data.type,
+        maxStudents,
+        price: data.price,
+        duration,
+        levelRequired: data.levelRequired,
+      },
+      include: {
+        coach: {
+          include: {
+            user: {
+              select: {
+                id: true,
+                firstName: true,
+                lastName: true,
+                avatarUrl: true,
+              },
+            },
+          },
+        },
+      },
+    });
+  }
+
+  // Listar clases
+  static async getClasses(filters: ClassFilters = {}) {
+    const where: any = {};
+
+    if (filters.coachId) {
+      where.coachId = filters.coachId;
+    }
+
+    if (filters.type) {
+      where.type = filters.type;
+    }
+
+    if (filters.isActive !== undefined) {
+      where.isActive = filters.isActive;
+    } else {
+      where.isActive = true;
+    }
+
+    if (filters.minPrice !== undefined || filters.maxPrice !== undefined) {
+      where.price = {};
+      if (filters.minPrice !== undefined) where.price.gte = filters.minPrice;
+      if (filters.maxPrice !== undefined) where.price.lte = filters.maxPrice;
+    }
+
+    if (filters.levelRequired) {
+      where.levelRequired = filters.levelRequired;
+    }
+
+    if (filters.search) {
+      where.OR = [
+        { title: { contains: filters.search, mode: 'insensitive' } },
+        { description: { contains: filters.search, mode: 'insensitive' } },
+      ];
+    }
+
+    const classes = await prisma.class.findMany({
+      where,
+      include: {
+        coach: {
+          include: {
+            user: {
+              select: {
+                id: true,
+                firstName: true,
+                lastName: true,
+                avatarUrl: true,
+              },
+            },
+          },
+        },
+        _count: {
+          select: {
+            sessions: {
+              where: {
+                status: { in: ['AVAILABLE', 'FULL'] },
+                date: { gte: new Date() },
+              },
+            },
+          },
+        },
+      },
+      orderBy: { createdAt: 'desc' },
+    });
+
+    return classes;
+  }
+
+  // Obtener clase por ID
+  static async getClassById(id: string) {
+    const classItem = await prisma.class.findUnique({
+      where: { id },
+      include: {
+        coach: {
+          include: {
+            user: {
+              select: {
+                id: true,
+                firstName: true,
+                lastName: true,
+                avatarUrl: true,
+                email: true,
+              },
+            },
+          },
+        },
+        sessions: {
+          where: {
+            status: { in: ['AVAILABLE', 'FULL'] },
+            date: { gte: new Date() },
+          },
+          orderBy: [{ date: 'asc' }, { startTime: 'asc' }],
+          include: {
+            court: {
+              select: {
+                id: true,
+                name: true,
+                type: true,
+              },
+            },
+            _count: {
+              select: {
+                enrollments: {
+                  where: { status: 'CONFIRMED' },
+                },
+              },
+            },
+          },
+        },
+        _count: {
+          select: {
+            sessions: true,
+          },
+        },
+      },
+    });
+
+    if (!classItem) {
+      throw new ApiError('Clase no encontrada', 404);
+    }
+
+    return classItem;
+  }
+
+  // Actualizar clase
+  static async updateClass(id: string, coachUserId: string, data: UpdateClassInput) {
+    // Verificar que el usuario es coach
+    const coach = await prisma.coach.findUnique({
+      where: { userId: coachUserId },
+    });
+
+    if (!coach) {
+      throw new ApiError('No tienes perfil de coach', 403);
+    }
+
+    // Verificar que la clase existe y pertenece al coach
+    const classItem = await prisma.class.findFirst({
+      where: {
+        id,
+        coachId: coach.id,
+      },
+    });
+
+    if (!classItem) {
+      throw new ApiError('Clase no encontrada o no tienes permisos', 404);
+    }
+
+    // Validar tipo si se está actualizando
+    if (data.type && !Object.values(ClassType).includes(data.type as any)) {
+      throw new ApiError(`Tipo de clase inválido. Opciones: ${Object.values(ClassType).join(', ')}`, 400);
+    }
+
+    // Validar maxStudents si se actualiza
+    if (data.maxStudents !== undefined && data.type) {
+      const limits = ClassLimits[data.type as keyof typeof ClassLimits];
+      if (data.maxStudents < limits.min || data.maxStudents > limits.max) {
+        throw new ApiError(
+          `Para clases ${data.type}, el cupo debe estar entre ${limits.min} y ${limits.max} alumnos`,
+          400
+        );
+      }
+    }
+
+    const updateData: any = {};
+    if (data.title !== undefined) updateData.title = data.title;
+    if (data.description !== undefined) updateData.description = data.description;
+    if (data.type !== undefined) updateData.type = data.type;
+    if (data.maxStudents !== undefined) updateData.maxStudents = data.maxStudents;
+    if (data.price !== undefined) updateData.price = data.price;
+    if (data.duration !== undefined) updateData.duration = data.duration;
+    if (data.levelRequired !== undefined) updateData.levelRequired = data.levelRequired;
+    if (data.isActive !== undefined) updateData.isActive = data.isActive;
+
+    return prisma.class.update({
+      where: { id },
+      data: updateData,
+      include: {
+        coach: {
+          include: {
+            user: {
+              select: {
+                id: true,
+                firstName: true,
+                lastName: true,
+              },
+            },
+          },
+        },
+      },
+    });
+  }
+
+  // Eliminar clase (desactivar)
+  static async deleteClass(id: string, coachUserId: string) {
+    // Verificar que el usuario es coach
+    const coach = await prisma.coach.findUnique({
+      where: { userId: coachUserId },
+    });
+
+    if (!coach) {
+      throw new ApiError('No tienes perfil de coach', 403);
+    }
+
+    // Verificar que la clase existe y pertenece al coach
+    const classItem = await prisma.class.findFirst({
+      where: {
+        id,
+        coachId: coach.id,
+      },
+    });
+
+    if (!classItem) {
+      throw new ApiError('Clase no encontrada o no tienes permisos', 404);
+    }
+
+    // Desactivar en lugar de eliminar
+    return prisma.class.update({
+      where: { id },
+      data: { isActive: false },
+    });
+  }
+
+  // Crear sesión de clase (programar una instancia específica)
+  static async createClassBooking(coachUserId: string, data: CreateClassBookingInput) {
+    // Verificar que el usuario es coach
+    const coach = await prisma.coach.findUnique({
+      where: { userId: coachUserId },
+    });
+
+    if (!coach) {
+      throw new ApiError('No tienes perfil de coach', 403);
+    }
+
+    // Verificar que la clase existe y pertenece al coach
+    const classItem = await prisma.class.findFirst({
+      where: {
+        id: data.classId,
+        coachId: coach.id,
+      },
+    });
+
+    if (!classItem) {
+      throw new ApiError('Clase no encontrada o no tienes permisos', 404);
+    }
+
+    // Validar fecha
+    const sessionDate = new Date(data.date);
+    const now = new Date();
+    now.setHours(0, 0, 0, 0);
+    
+    if (sessionDate < now) {
+      throw new ApiError('No puedes programar sesiones en fechas pasadas', 400);
+    }
+
+    // Validar formato de hora
+    const timeRegex = /^([0-1]?[0-9]|2[0-3]):[0-5][0-9]$/;
+    if (!timeRegex.test(data.startTime)) {
+      throw new ApiError('Formato de hora inválido (HH:mm)', 400);
+    }
+
+    // Calcular hora de fin
+    const [hours, minutes] = data.startTime.split(':').map(Number);
+    const endMinutes = hours * 60 + minutes + classItem.duration;
+    const endHours = Math.floor(endMinutes / 60);
+    const endMins = endMinutes % 60;
+    const endTime = `${endHours.toString().padStart(2, '0')}:${endMins.toString().padStart(2, '0')}`;
+
+    // Verificar disponibilidad del coach
+    const dayOfWeek = sessionDate.getDay();
+    const availability = await prisma.coachAvailability.findFirst({
+      where: {
+        coachId: coach.id,
+        dayOfWeek,
+        isAvailable: true,
+        startTime: { lte: data.startTime },
+        endTime: { gte: endTime },
+      },
+    });
+
+    if (!availability) {
+      throw new ApiError('No tienes disponibilidad para este horario', 400);
+    }
+
+    // Verificar que no haya otra sesión en ese horario
+    const existingSession = await prisma.classBooking.findFirst({
+      where: {
+        coachId: coach.id,
+        date: sessionDate,
+        status: { not: 'CANCELLED' },
+        OR: [
+          {
+            startTime: { lte: data.startTime },
+            AND: {
+              NOT: {
+                startTime: {
+                  lt: endTime,
+                },
+              },
+            },
+          },
+          {
+            startTime: { gte: data.startTime },
+            AND: {
+              startTime: { lt: endTime },
+            },
+          },
+        ],
+      },
+    });
+
+    if (existingSession) {
+      throw new ApiError('Ya tienes una sesión programada en este horario', 409);
+    }
+
+    // Verificar cancha si se especificó
+    if (data.courtId) {
+      const court = await prisma.court.findUnique({
+        where: { id: data.courtId },
+      });
+
+      if (!court) {
+        throw new ApiError('Cancha no encontrada', 404);
+      }
+
+      if (!court.isActive) {
+        throw new ApiError('La cancha no está disponible', 400);
+      }
+
+      // Verificar disponibilidad de cancha
+      const courtBooking = await prisma.booking.findFirst({
+        where: {
+          courtId: data.courtId,
+          date: sessionDate,
+          status: { in: ['PENDING', 'CONFIRMED'] },
+          OR: [
+            {
+              startTime: { lte: data.startTime },
+              endTime: { gt: data.startTime },
+            },
+            {
+              startTime: { lt: endTime },
+              endTime: { gte: endTime },
+            },
+          ],
+        },
+      });
+
+      if (courtBooking) {
+        throw new ApiError('La cancha no está disponible en este horario', 409);
+      }
+    }
+
+    return prisma.classBooking.create({
+      data: {
+        classId: data.classId,
+        coachId: coach.id,
+        courtId: data.courtId,
+        date: sessionDate,
+        startTime: data.startTime,
+        maxStudents: classItem.maxStudents,
+        price: data.price || classItem.price,
+        status: ClassBookingStatus.AVAILABLE,
+      },
+      include: {
+        class: true,
+        coach: {
+          include: {
+            user: {
+              select: {
+                firstName: true,
+                lastName: true,
+              },
+            },
+          },
+        },
+        court: {
+          select: {
+            id: true,
+            name: true,
+          },
+        },
+      },
+    });
+  }
+
+  // Obtener sesiones de una clase
+  static async getClassBookings(classId: string) {
+    const classItem = await prisma.class.findUnique({
+      where: { id: classId },
+    });
+
+    if (!classItem) {
+      throw new ApiError('Clase no encontrada', 404);
+    }
+
+    const sessions = await prisma.classBooking.findMany({
+      where: {
+        classId,
+        status: { not: 'CANCELLED' },
+      },
+      include: {
+        court: {
+          select: {
+            id: true,
+            name: true,
+            type: true,
+          },
+        },
+        _count: {
+          select: {
+            enrollments: {
+              where: { status: 'CONFIRMED' },
+            },
+          },
+        },
+      },
+      orderBy: [{ date: 'asc' }, { startTime: 'asc' }],
+    });
+
+    return sessions.map(session => ({
+      ...session,
+      students: session.students ? JSON.parse(session.students) : [],
+    }));
+  }
+
+  // Cancelar sesión de clase
+  static async cancelClassBooking(id: string, coachUserId: string) {
+    // Verificar que el usuario es coach
+    const coach = await prisma.coach.findUnique({
+      where: { userId: coachUserId },
+    });
+
+    if (!coach) {
+      throw new ApiError('No tienes perfil de coach', 403);
+    }
+
+    // Verificar que la sesión existe y pertenece al coach
+    const session = await prisma.classBooking.findFirst({
+      where: {
+        id,
+        coachId: coach.id,
+      },
+      include: {
+        enrollments: true,
+      },
+    });
+
+    if (!session) {
+      throw new ApiError('Sesión no encontrada o no tienes permisos', 404);
+    }
+
+    if (session.status === ClassBookingStatus.CANCELLED) {
+      throw new ApiError('La sesión ya está cancelada', 400);
+    }
+
+    // Cancelar en transacción
+    await prisma.$transaction([
+      // Cancelar sesión
+      prisma.classBooking.update({
+        where: { id },
+        data: { status: ClassBookingStatus.CANCELLED },
+      }),
+      
+      // Cancelar todas las inscripciones
+      prisma.studentEnrollment.updateMany({
+        where: {
+          classBookingId: id,
+          status: { in: ['PENDING', 'CONFIRMED'] },
+        },
+        data: {
+          status: 'CANCELLED',
+          cancelledAt: new Date(),
+        },
+      }),
+    ]);
+
+    return { message: 'Sesión cancelada exitosamente' };
+  }
+}
+
+export default ClassService;
diff --git a/backend/src/services/classEnrollment.service.ts b/backend/src/services/classEnrollment.service.ts
new file mode 100644
index 0000000..93b032a
--- /dev/null
+++ b/backend/src/services/classEnrollment.service.ts
@@ -0,0 +1,528 @@
+import prisma from '../config/database';
+import { ApiError } from '../middleware/errorHandler';
+import { EnrollmentStatus, ClassBookingStatus } from '../utils/constants';
+import { preferenceClient, isMercadoPagoConfigured } from '../config/mercadopago';
+import logger from '../config/logger';
+import config from '../config';
+
+export interface EnrollmentInput {
+  classBookingId: string;
+}
+
+export class ClassEnrollmentService {
+  // Inscribirse en una clase
+  static async enrollInClass(userId: string, data: EnrollmentInput) {
+    const { classBookingId } = data;
+
+    // Verificar que la sesión existe y está disponible
+    const session = await prisma.classBooking.findUnique({
+      where: { id: classBookingId },
+      include: {
+        class: true,
+        coach: {
+          include: {
+            user: true,
+          },
+        },
+        enrollments: {
+          where: { status: { in: ['PENDING', 'CONFIRMED'] } },
+        },
+      },
+    });
+
+    if (!session) {
+      throw new ApiError('Sesión de clase no encontrada', 404);
+    }
+
+    // Verificar estado de la sesión
+    if (session.status === ClassBookingStatus.CANCELLED) {
+      throw new ApiError('Esta sesión ha sido cancelada', 400);
+    }
+
+    if (session.status === ClassBookingStatus.COMPLETED) {
+      throw new ApiError('Esta sesión ya ha finalizado', 400);
+    }
+
+    // Verificar que no se inscriba en su propia clase (si es coach)
+    if (session.coach.user.id === userId) {
+      throw new ApiError('No puedes inscribirte en tu propia clase', 400);
+    }
+
+    // Verificar cupo disponible
+    if (session.status === ClassBookingStatus.FULL) {
+      throw new ApiError('No hay cupos disponibles para esta sesión', 400);
+    }
+
+    const enrolledCount = session.enrollments.filter(
+      e => e.status === EnrollmentStatus.CONFIRMED
+    ).length;
+    
+    if (enrolledCount >= session.maxStudents) {
+      throw new ApiError('No hay cupos disponibles para esta sesión', 400);
+    }
+
+    // Verificar si ya está inscrito
+    const existingEnrollment = await prisma.studentEnrollment.findFirst({
+      where: {
+        classBookingId,
+        userId,
+        status: { in: ['PENDING', 'CONFIRMED'] },
+      },
+    });
+
+    if (existingEnrollment) {
+      throw new ApiError('Ya estás inscrito en esta sesión', 409);
+    }
+
+    // Obtener datos del usuario
+    const user = await prisma.user.findUnique({
+      where: { id: userId },
+    });
+
+    if (!user) {
+      throw new ApiError('Usuario no encontrado', 404);
+    }
+
+    // Crear preferencia de pago en MercadoPago
+    let paymentPreference = null;
+    let paymentRecord = null;
+
+    if (session.price > 0 && isMercadoPagoConfigured()) {
+      try {
+        const preferenceData = {
+          items: [
+            {
+              id: `class_${classBookingId}`,
+              title: `Clase: ${session.class.title}`,
+              description: `Clase con ${session.coach.user.firstName} ${session.coach.user.lastName} - ${session.date.toLocaleDateString()} ${session.startTime}`,
+              quantity: 1,
+              unit_price: session.price / 100, // Convertir centavos a unidades
+              currency_id: 'ARS',
+            },
+          ],
+          payer: {
+            name: user.firstName,
+            surname: user.lastName,
+            email: user.email,
+          },
+          external_reference: `class_enrollment_${userId}_${classBookingId}_${Date.now()}`,
+          notification_url: `${config.API_URL}/api/v1/class-enrollments/webhook`,
+          back_urls: {
+            success: `${config.FRONTEND_URL}/classes/enrollment/success`,
+            failure: `${config.FRONTEND_URL}/classes/enrollment/failure`,
+            pending: `${config.FRONTEND_URL}/classes/enrollment/pending`,
+          },
+          auto_return: 'approved' as const,
+        };
+
+        const preference = await preferenceClient.create({ body: preferenceData });
+        paymentPreference = preference;
+
+        // Crear registro de pago
+        paymentRecord = await prisma.payment.create({
+          data: {
+            userId,
+            type: 'CLASS',
+            referenceId: classBookingId,
+            amount: session.price,
+            currency: 'ARS',
+            provider: 'MERCADOPAGO',
+            providerPreferenceId: preference.id!,
+            status: 'PENDING',
+          },
+        });
+      } catch (error) {
+        logger.error('Error creando preferencia de pago MP:', error);
+        throw new ApiError('Error al procesar el pago', 500);
+      }
+    } else if (session.price > 0 && !isMercadoPagoConfigured()) {
+      // Si no está configurado MP pero hay precio, error
+      throw new ApiError('Sistema de pagos no configurado', 500);
+    }
+
+    // Crear inscripción
+    const enrollment = await prisma.studentEnrollment.create({
+      data: {
+        classBookingId,
+        userId,
+        paymentId: paymentRecord?.id,
+        status: session.price > 0 ? EnrollmentStatus.PENDING : EnrollmentStatus.CONFIRMED,
+      },
+      include: {
+        user: {
+          select: {
+            id: true,
+            firstName: true,
+            lastName: true,
+            email: true,
+          },
+        },
+        classBooking: {
+          include: {
+            class: true,
+            coach: {
+              include: {
+                user: {
+                  select: {
+                    firstName: true,
+                    lastName: true,
+                  },
+                },
+              },
+            },
+          },
+        },
+      },
+    });
+
+    // Si no hay costo, actualizar contador
+    if (session.price === 0) {
+      await this.updateSessionEnrollmentCount(classBookingId);
+    }
+
+    return {
+      enrollment,
+      payment: paymentPreference ? {
+        preferenceId: paymentPreference.id,
+        initPoint: paymentPreference.init_point,
+        sandboxInitPoint: paymentPreference.sandbox_init_point,
+      } : null,
+    };
+  }
+
+  // Procesar webhook de MercadoPago
+  static async processPaymentWebhook(payload: any) {
+    const { type, data } = payload;
+
+    if (type !== 'payment') {
+      return { message: 'Evento ignorado' };
+    }
+
+    const paymentId = data.id;
+
+    try {
+      // Obtener información del pago desde MP (simulado - en producción consultar API)
+      // Aquí deberías hacer la llamada real a MP para obtener el estado
+      const paymentStatus = payload.data?.status || 'approved';
+
+      // Buscar el pago en nuestra base de datos
+      const payment = await prisma.payment.findFirst({
+        where: {
+          OR: [
+            { providerPaymentId: paymentId },
+            { providerPreferenceId: paymentId },
+          ],
+        },
+      });
+
+      if (!payment) {
+        logger.warn(`Pago no encontrado: ${paymentId}`);
+        return { message: 'Pago no encontrado' };
+      }
+
+      if (payment.type !== 'CLASS') {
+        return { message: 'No es pago de clase' };
+      }
+
+      // Buscar inscripción asociada
+      const enrollment = await prisma.studentEnrollment.findFirst({
+        where: { paymentId: payment.id },
+      });
+
+      if (!enrollment) {
+        logger.warn(`Inscripción no encontrada para pago: ${payment.id}`);
+        return { message: 'Inscripción no encontrada' };
+      }
+
+      // Procesar según estado del pago
+      if (paymentStatus === 'approved') {
+        await prisma.$transaction([
+          // Actualizar pago
+          prisma.payment.update({
+            where: { id: payment.id },
+            data: {
+              status: 'COMPLETED',
+              providerPaymentId: paymentId,
+              paidAt: new Date(),
+            },
+          }),
+          
+          // Actualizar inscripción
+          prisma.studentEnrollment.update({
+            where: { id: enrollment.id },
+            data: { status: EnrollmentStatus.CONFIRMED },
+          }),
+        ]);
+
+        // Actualizar contador de la sesión
+        await this.updateSessionEnrollmentCount(enrollment.classBookingId);
+
+        logger.info(`Pago de clase aprobado: ${payment.id}`);
+      } else if (['rejected', 'cancelled'].includes(paymentStatus)) {
+        await prisma.$transaction([
+          prisma.payment.update({
+            where: { id: payment.id },
+            data: { status: paymentStatus === 'cancelled' ? 'CANCELLED' : 'FAILED' },
+          }),
+          prisma.studentEnrollment.update({
+            where: { id: enrollment.id },
+            data: { status: EnrollmentStatus.CANCELLED },
+          }),
+        ]);
+
+        logger.info(`Pago de clase rechazado/cancelado: ${payment.id}`);
+      }
+
+      return { message: 'Webhook procesado' };
+    } catch (error) {
+      logger.error('Error procesando webhook:', error);
+      throw new ApiError('Error procesando webhook', 500);
+    }
+  }
+
+  // Cancelar inscripción
+  static async cancelEnrollment(userId: string, enrollmentId: string) {
+    const enrollment = await prisma.studentEnrollment.findFirst({
+      where: {
+        id: enrollmentId,
+        userId,
+      },
+      include: {
+        classBooking: true,
+      },
+    });
+
+    if (!enrollment) {
+      throw new ApiError('Inscripción no encontrada', 404);
+    }
+
+    if (enrollment.status === EnrollmentStatus.CANCELLED) {
+      throw new ApiError('La inscripción ya está cancelada', 400);
+    }
+
+    // Verificar política de cancelación (24h antes)
+    const sessionDate = new Date(enrollment.classBooking.date);
+    const now = new Date();
+    const hoursUntilSession = (sessionDate.getTime() - now.getTime()) / (1000 * 60 * 60);
+
+    if (hoursUntilSession < 24 && enrollment.status === EnrollmentStatus.CONFIRMED) {
+      throw new ApiError(
+        'No puedes cancelar con menos de 24 horas de anticipación',
+        400
+      );
+    }
+
+    // Cancelar inscripción
+    await prisma.studentEnrollment.update({
+      where: { id: enrollmentId },
+      data: {
+        status: EnrollmentStatus.CANCELLED,
+        cancelledAt: new Date(),
+      },
+    });
+
+    // Si estaba confirmada, actualizar contador
+    if (enrollment.status === EnrollmentStatus.CONFIRMED) {
+      await this.updateSessionEnrollmentCount(enrollment.classBookingId);
+    }
+
+    return { message: 'Inscripción cancelada exitosamente' };
+  }
+
+  // Obtener mis inscripciones
+  static async getMyEnrollments(userId: string, status?: string) {
+    const where: any = { userId };
+    
+    if (status) {
+      where.status = status;
+    }
+
+    const enrollments = await prisma.studentEnrollment.findMany({
+      where,
+      include: {
+        classBooking: {
+          include: {
+            class: true,
+            coach: {
+              include: {
+                user: {
+                  select: {
+                    firstName: true,
+                    lastName: true,
+                    avatarUrl: true,
+                  },
+                },
+              },
+            },
+            court: {
+              select: {
+                id: true,
+                name: true,
+              },
+            },
+          },
+        },
+      },
+      orderBy: { enrolledAt: 'desc' },
+    });
+
+    // Obtener pagos asociados manualmente
+    const enrollmentIds = enrollments.map(e => e.id);
+    const payments = await prisma.payment.findMany({
+      where: {
+        type: 'CLASS',
+        referenceId: { in: enrollmentIds },
+      },
+      select: {
+        id: true,
+        referenceId: true,
+        status: true,
+        amount: true,
+        paidAt: true,
+      },
+    });
+
+    const paymentsMap = new Map(payments.map(p => [p.referenceId, p]));
+
+    return enrollments.map(e => ({
+      ...e,
+      payment: paymentsMap.get(e.id) || null,
+    }));
+  }
+
+  // Obtener inscripción por ID
+  static async getEnrollmentById(id: string, userId: string) {
+    const enrollment = await prisma.studentEnrollment.findFirst({
+      where: {
+        id,
+        userId,
+      },
+      include: {
+        classBooking: {
+          include: {
+            class: true,
+            coach: {
+              include: {
+                user: {
+                  select: {
+                    firstName: true,
+                    lastName: true,
+                    avatarUrl: true,
+                    email: true,
+                  },
+                },
+              },
+            },
+            court: true,
+          },
+        },
+      },
+    });
+
+    if (!enrollment) {
+      throw new ApiError('Inscripción no encontrada', 404);
+    }
+
+    // Obtener pago asociado manualmente
+    const payment = await prisma.payment.findFirst({
+      where: {
+        type: 'CLASS',
+        referenceId: enrollment.id,
+      },
+    });
+
+    return {
+      ...enrollment,
+      payment,
+    };
+  }
+
+  // Marcar asistencia (solo coach)
+  static async markAttendance(enrollmentId: string, coachUserId: string) {
+    // Verificar que el usuario es coach
+    const coach = await prisma.coach.findUnique({
+      where: { userId: coachUserId },
+    });
+
+    if (!coach) {
+      throw new ApiError('No tienes perfil de coach', 403);
+    }
+
+    // Verificar que la inscripción existe y pertenece a una sesión del coach
+    const enrollment = await prisma.studentEnrollment.findFirst({
+      where: { id: enrollmentId },
+      include: {
+        classBooking: true,
+      },
+    });
+
+    if (!enrollment) {
+      throw new ApiError('Inscripción no encontrada', 404);
+    }
+
+    if (enrollment.classBooking.coachId !== coach.id) {
+      throw new ApiError('No tienes permisos para esta inscripción', 403);
+    }
+
+    if (enrollment.status !== EnrollmentStatus.CONFIRMED) {
+      throw new ApiError('Solo se puede marcar asistencia de inscripciones confirmadas', 400);
+    }
+
+    return prisma.studentEnrollment.update({
+      where: { id: enrollmentId },
+      data: { status: EnrollmentStatus.ATTENDED },
+      include: {
+        user: {
+          select: {
+            id: true,
+            firstName: true,
+            lastName: true,
+          },
+        },
+        classBooking: {
+          include: {
+            class: {
+              select: {
+                title: true,
+              },
+            },
+          },
+        },
+      },
+    });
+  }
+
+  // Helper: Actualizar contador de inscripciones de sesión
+  private static async updateSessionEnrollmentCount(classBookingId: string) {
+    const confirmedCount = await prisma.studentEnrollment.count({
+      where: {
+        classBookingId,
+        status: EnrollmentStatus.CONFIRMED,
+      },
+    });
+
+    const session = await prisma.classBooking.findUnique({
+      where: { id: classBookingId },
+    });
+
+    if (!session) return;
+
+    let newStatus = session.status;
+    
+    if (confirmedCount >= session.maxStudents) {
+      newStatus = ClassBookingStatus.FULL;
+    } else if (confirmedCount < session.maxStudents && session.status === ClassBookingStatus.FULL) {
+      newStatus = ClassBookingStatus.AVAILABLE;
+    }
+
+    await prisma.classBooking.update({
+      where: { id: classBookingId },
+      data: {
+        enrolledStudents: confirmedCount,
+        status: newStatus,
+      },
+    });
+  }
+}
+
+export default ClassEnrollmentService;
diff --git a/backend/src/services/coach.service.ts b/backend/src/services/coach.service.ts
new file mode 100644
index 0000000..efa407f
--- /dev/null
+++ b/backend/src/services/coach.service.ts
@@ -0,0 +1,602 @@
+import prisma from '../config/database';
+import { ApiError } from '../middleware/errorHandler';
+import { ClassType } from '../utils/constants';
+
+export interface RegisterCoachInput {
+  bio?: string;
+  specialties?: string[];
+  certifications?: string[];
+  yearsExperience?: number;
+  hourlyRate?: number;
+  photoUrl?: string;
+}
+
+export interface UpdateCoachInput {
+  bio?: string;
+  specialties?: string[];
+  certifications?: string[];
+  yearsExperience?: number;
+  hourlyRate?: number;
+  photoUrl?: string;
+  isActive?: boolean;
+}
+
+export interface AddAvailabilityInput {
+  dayOfWeek: number;
+  startTime: string;
+  endTime: string;
+}
+
+export interface CoachFilters {
+  isActive?: boolean;
+  isVerified?: boolean;
+  minRating?: number;
+  specialty?: string;
+  search?: string;
+}
+
+export interface ReviewInput {
+  rating: number;
+  comment?: string;
+}
+
+export class CoachService {
+  // Registrar usuario como coach
+  static async registerAsCoach(userId: string, data: RegisterCoachInput) {
+    // Verificar que el usuario existe y está verificado
+    const user = await prisma.user.findUnique({
+      where: { id: userId },
+    });
+
+    if (!user) {
+      throw new ApiError('Usuario no encontrado', 404);
+    }
+
+    if (!user.isVerified) {
+      throw new ApiError('Debes verificar tu cuenta para ser coach', 403);
+    }
+
+    // Verificar que no sea coach ya
+    const existingCoach = await prisma.coach.findUnique({
+      where: { userId },
+    });
+
+    if (existingCoach) {
+      throw new ApiError('Ya estás registrado como coach', 409);
+    }
+
+    // Crear perfil de coach
+    const coach = await prisma.coach.create({
+      data: {
+        userId,
+        bio: data.bio,
+        specialties: data.specialties ? JSON.stringify(data.specialties) : null,
+        certifications: data.certifications ? JSON.stringify(data.certifications) : null,
+        yearsExperience: data.yearsExperience || 0,
+        hourlyRate: data.hourlyRate || 0,
+        photoUrl: data.photoUrl,
+      },
+      include: {
+        user: {
+          select: {
+            id: true,
+            firstName: true,
+            lastName: true,
+            email: true,
+            avatarUrl: true,
+          },
+        },
+      },
+    });
+
+    return coach;
+  }
+
+  // Listar coaches
+  static async getCoaches(filters: CoachFilters = {}) {
+    const where: any = {};
+
+    if (filters.isActive !== undefined) {
+      where.isActive = filters.isActive;
+    } else {
+      where.isActive = true; // Por defecto solo activos
+    }
+
+    if (filters.isVerified !== undefined) {
+      where.isVerified = filters.isVerified;
+    }
+
+    if (filters.minRating !== undefined) {
+      where.rating = { gte: filters.minRating };
+    }
+
+    if (filters.specialty) {
+      where.specialties = { contains: filters.specialty };
+    }
+
+    if (filters.search) {
+      where.user = {
+        OR: [
+          { firstName: { contains: filters.search, mode: 'insensitive' } },
+          { lastName: { contains: filters.search, mode: 'insensitive' } },
+        ],
+      };
+    }
+
+    const coaches = await prisma.coach.findMany({
+      where,
+      include: {
+        user: {
+          select: {
+            id: true,
+            firstName: true,
+            lastName: true,
+            email: true,
+            avatarUrl: true,
+            city: true,
+          },
+        },
+        _count: {
+          select: {
+            classes: true,
+            coachReviews: true,
+          },
+        },
+      },
+      orderBy: { rating: 'desc' },
+    });
+
+    return coaches.map(coach => ({
+      ...coach,
+      specialties: coach.specialties ? JSON.parse(coach.specialties) : [],
+      certifications: coach.certifications ? JSON.parse(coach.certifications) : [],
+    }));
+  }
+
+  // Obtener coach por ID
+  static async getCoachById(id: string) {
+    const coach = await prisma.coach.findUnique({
+      where: { id },
+      include: {
+        user: {
+          select: {
+            id: true,
+            firstName: true,
+            lastName: true,
+            email: true,
+            avatarUrl: true,
+            city: true,
+            playerLevel: true,
+          },
+        },
+        classes: {
+          where: { isActive: true },
+          select: {
+            id: true,
+            title: true,
+            type: true,
+            price: true,
+            duration: true,
+            maxStudents: true,
+          },
+        },
+        _count: {
+          select: {
+            classes: true,
+            coachReviews: true,
+          },
+        },
+      },
+    });
+
+    if (!coach) {
+      throw new ApiError('Coach no encontrado', 404);
+    }
+
+    return {
+      ...coach,
+      specialties: coach.specialties ? JSON.parse(coach.specialties) : [],
+      certifications: coach.certifications ? JSON.parse(coach.certifications) : [],
+    };
+  }
+
+  // Obtener mi perfil de coach
+  static async getMyCoachProfile(userId: string) {
+    const coach = await prisma.coach.findUnique({
+      where: { userId },
+      include: {
+        user: {
+          select: {
+            id: true,
+            firstName: true,
+            lastName: true,
+            email: true,
+            avatarUrl: true,
+            phone: true,
+          },
+        },
+        classes: true,
+        availabilities: true,
+        _count: {
+          select: {
+            classBookings: true,
+            coachReviews: true,
+          },
+        },
+      },
+    });
+
+    if (!coach) {
+      throw new ApiError('No tienes perfil de coach', 404);
+    }
+
+    return {
+      ...coach,
+      specialties: coach.specialties ? JSON.parse(coach.specialties) : [],
+      certifications: coach.certifications ? JSON.parse(coach.certifications) : [],
+    };
+  }
+
+  // Actualizar perfil de coach
+  static async updateCoachProfile(userId: string, data: UpdateCoachInput) {
+    const coach = await prisma.coach.findUnique({
+      where: { userId },
+    });
+
+    if (!coach) {
+      throw new ApiError('No tienes perfil de coach', 404);
+    }
+
+    const updateData: any = {};
+
+    if (data.bio !== undefined) updateData.bio = data.bio;
+    if (data.specialties !== undefined) updateData.specialties = JSON.stringify(data.specialties);
+    if (data.certifications !== undefined) updateData.certifications = JSON.stringify(data.certifications);
+    if (data.yearsExperience !== undefined) updateData.yearsExperience = data.yearsExperience;
+    if (data.hourlyRate !== undefined) updateData.hourlyRate = data.hourlyRate;
+    if (data.photoUrl !== undefined) updateData.photoUrl = data.photoUrl;
+    if (data.isActive !== undefined) updateData.isActive = data.isActive;
+
+    const updatedCoach = await prisma.coach.update({
+      where: { userId },
+      data: updateData,
+      include: {
+        user: {
+          select: {
+            id: true,
+            firstName: true,
+            lastName: true,
+            email: true,
+            avatarUrl: true,
+          },
+        },
+      },
+    });
+
+    return {
+      ...updatedCoach,
+      specialties: updatedCoach.specialties ? JSON.parse(updatedCoach.specialties) : [],
+      certifications: updatedCoach.certifications ? JSON.parse(updatedCoach.certifications) : [],
+    };
+  }
+
+  // Verificar coach (solo admin)
+  static async verifyCoach(coachId: string, adminId: string) {
+    const coach = await prisma.coach.findUnique({
+      where: { id: coachId },
+    });
+
+    if (!coach) {
+      throw new ApiError('Coach no encontrado', 404);
+    }
+
+    if (coach.isVerified) {
+      throw new ApiError('El coach ya está verificado', 400);
+    }
+
+    return prisma.coach.update({
+      where: { id: coachId },
+      data: { isVerified: true },
+      include: {
+        user: {
+          select: {
+            id: true,
+            firstName: true,
+            lastName: true,
+            email: true,
+          },
+        },
+      },
+    });
+  }
+
+  // Agregar disponibilidad
+  static async addAvailability(userId: string, data: AddAvailabilityInput) {
+    const coach = await prisma.coach.findUnique({
+      where: { userId },
+    });
+
+    if (!coach) {
+      throw new ApiError('No tienes perfil de coach', 404);
+    }
+
+    // Validar día de la semana
+    if (data.dayOfWeek < 0 || data.dayOfWeek > 6) {
+      throw new ApiError('Día de la semana inválido (0-6)', 400);
+    }
+
+    // Validar formato de hora
+    const timeRegex = /^([0-1]?[0-9]|2[0-3]):[0-5][0-9]$/;
+    if (!timeRegex.test(data.startTime) || !timeRegex.test(data.endTime)) {
+      throw new ApiError('Formato de hora inválido (HH:mm)', 400);
+    }
+
+    // Validar que hora fin sea mayor que hora inicio
+    const startMinutes = this.timeToMinutes(data.startTime);
+    const endMinutes = this.timeToMinutes(data.endTime);
+    if (endMinutes <= startMinutes) {
+      throw new ApiError('La hora de fin debe ser mayor que la hora de inicio', 400);
+    }
+
+    return prisma.coachAvailability.create({
+      data: {
+        coachId: coach.id,
+        dayOfWeek: data.dayOfWeek,
+        startTime: data.startTime,
+        endTime: data.endTime,
+      },
+    });
+  }
+
+  // Eliminar disponibilidad
+  static async removeAvailability(userId: string, availabilityId: string) {
+    const coach = await prisma.coach.findUnique({
+      where: { userId },
+    });
+
+    if (!coach) {
+      throw new ApiError('No tienes perfil de coach', 404);
+    }
+
+    const availability = await prisma.coachAvailability.findFirst({
+      where: {
+        id: availabilityId,
+        coachId: coach.id,
+      },
+    });
+
+    if (!availability) {
+      throw new ApiError('Horario no encontrado', 404);
+    }
+
+    return prisma.coachAvailability.delete({
+      where: { id: availabilityId },
+    });
+  }
+
+  // Obtener disponibilidad de un coach
+  static async getAvailability(coachId: string, date?: Date) {
+    const coach = await prisma.coach.findUnique({
+      where: { id: coachId },
+    });
+
+    if (!coach) {
+      throw new ApiError('Coach no encontrado', 404);
+    }
+
+    if (date) {
+      // Obtener disponibilidad para un día específico
+      const dayOfWeek = date.getDay();
+      const availabilities = await prisma.coachAvailability.findMany({
+        where: {
+          coachId,
+          dayOfWeek,
+          isAvailable: true,
+        },
+        orderBy: { startTime: 'asc' },
+      });
+
+      // Obtener sesiones programadas para esa fecha
+      const sessions = await prisma.classBooking.findMany({
+        where: {
+          coachId,
+          date: {
+            gte: new Date(date.setHours(0, 0, 0, 0)),
+            lt: new Date(date.setHours(23, 59, 59, 999)),
+          },
+          status: { not: 'CANCELLED' },
+        },
+        include: {
+          class: {
+            select: {
+              duration: true,
+            },
+          },
+        },
+      });
+
+      // Filtrar disponibilidad ocupada
+      const availableSlots = availabilities.flatMap(avail => {
+        const slots = [];
+        const startMinutes = this.timeToMinutes(avail.startTime);
+        const endMinutes = this.timeToMinutes(avail.endTime);
+        
+        // Generar slots de 60 minutos
+        for (let time = startMinutes; time + 60 <= endMinutes; time += 60) {
+          const slotStart = this.minutesToTime(time);
+          const slotEnd = this.minutesToTime(time + 60);
+          
+          // Verificar si está ocupado
+          const isOccupied = sessions.some(session => {
+            const sessionStart = this.timeToMinutes(session.startTime);
+            const sessionEnd = sessionStart + session.class.duration;
+            return time < sessionEnd && (time + 60) > sessionStart;
+          });
+
+          if (!isOccupied) {
+            slots.push({
+              startTime: slotStart,
+              endTime: slotEnd,
+            });
+          }
+        }
+        
+        return slots;
+      });
+
+      return {
+        date,
+        dayOfWeek,
+        slots: availableSlots,
+      };
+    } else {
+      // Obtener toda la disponibilidad
+      const availabilities = await prisma.coachAvailability.findMany({
+        where: {
+          coachId,
+          isAvailable: true,
+        },
+        orderBy: [{ dayOfWeek: 'asc' }, { startTime: 'asc' }],
+      });
+
+      return availabilities;
+    }
+  }
+
+  // Agregar reseña
+  static async addReview(userId: string, coachId: string, data: ReviewInput) {
+    // Verificar que el coach existe
+    const coach = await prisma.coach.findUnique({
+      where: { id: coachId },
+    });
+
+    if (!coach) {
+      throw new ApiError('Coach no encontrado', 404);
+    }
+
+    // No puede reseñarse a sí mismo
+    if (coach.userId === userId) {
+      throw new ApiError('No puedes reseñarte a ti mismo', 400);
+    }
+
+    // Validar rating
+    if (data.rating < 1 || data.rating > 5) {
+      throw new ApiError('La calificación debe ser entre 1 y 5', 400);
+    }
+
+    // Verificar que no haya reseñado antes
+    const existingReview = await prisma.coachReview.findUnique({
+      where: {
+        coachId_userId: {
+          coachId,
+          userId,
+        },
+      },
+    });
+
+    if (existingReview) {
+      throw new ApiError('Ya has reseñado a este coach', 409);
+    }
+
+    // Crear reseña en transacción
+    const [review] = await prisma.$transaction([
+      // Crear reseña
+      prisma.coachReview.create({
+        data: {
+          coachId,
+          userId,
+          rating: data.rating,
+          comment: data.comment,
+        },
+        include: {
+          user: {
+            select: {
+              id: true,
+              firstName: true,
+              lastName: true,
+              avatarUrl: true,
+            },
+          },
+        },
+      }),
+      
+      // Actualizar rating del coach
+      prisma.$executeRaw`
+        UPDATE coaches 
+        SET rating = (
+          SELECT AVG(CAST(rating AS REAL)) 
+          FROM coach_reviews 
+          WHERE coachId = ${coachId}
+        ),
+        reviewCount = (
+          SELECT COUNT(*) 
+          FROM coach_reviews 
+          WHERE coachId = ${coachId}
+        ),
+        updatedAt = datetime('now')
+        WHERE id = ${coachId}
+      `,
+    ]);
+
+    return review;
+  }
+
+  // Obtener reseñas de un coach
+  static async getReviews(coachId: string, page = 1, limit = 10) {
+    const coach = await prisma.coach.findUnique({
+      where: { id: coachId },
+    });
+
+    if (!coach) {
+      throw new ApiError('Coach no encontrado', 404);
+    }
+
+    const skip = (page - 1) * limit;
+
+    const [reviews, total] = await Promise.all([
+      prisma.coachReview.findMany({
+        where: { coachId },
+        include: {
+          user: {
+            select: {
+              id: true,
+              firstName: true,
+              lastName: true,
+              avatarUrl: true,
+            },
+          },
+        },
+        orderBy: { createdAt: 'desc' },
+        skip,
+        take: limit,
+      }),
+      prisma.coachReview.count({
+        where: { coachId },
+      }),
+    ]);
+
+    return {
+      reviews,
+      pagination: {
+        page,
+        limit,
+        total,
+        pages: Math.ceil(total / limit),
+      },
+    };
+  }
+
+  // Helpers
+  private static timeToMinutes(time: string): number {
+    const [hours, minutes] = time.split(':').map(Number);
+    return hours * 60 + minutes;
+  }
+
+  private static minutesToTime(minutes: number): string {
+    const hours = Math.floor(minutes / 60);
+    const mins = minutes % 60;
+    return `${hours.toString().padStart(2, '0')}:${mins.toString().padStart(2, '0')}`;
+  }
+}
+
+export default CoachService;
diff --git a/backend/src/services/payment.service.ts b/backend/src/services/payment.service.ts
new file mode 100644
index 0000000..262e3d8
--- /dev/null
+++ b/backend/src/services/payment.service.ts
@@ -0,0 +1,582 @@
+import { MercadoPagoConfig, Preference, Payment as MPPayment } from 'mercadopago';
+import prisma from '../config/database';
+import config from '../config';
+import logger from '../config/logger';
+import { ApiError } from '../middleware/errorHandler';
+
+// Función helper para hacer reembolsos vía API REST
+async function refundPaymentViaAPI(paymentId: string, amount?: number): Promise<any> {
+  const url = `https://api.mercadopago.com/v1/payments/${paymentId}/refunds`;
+  
+  const body: any = {};
+  if (amount) {
+    body.amount = amount / 100; // Convertir centavos a unidades
+  }
+  
+  const response = await fetch(url, {
+    method: 'POST',
+    headers: {
+      'Authorization': `Bearer ${config.MERCADOPAGO.ACCESS_TOKEN}`,
+      'Content-Type': 'application/json',
+    },
+    body: Object.keys(body).length > 0 ? JSON.stringify(body) : undefined,
+  });
+  
+  if (!response.ok) {
+    const error = await response.json() as { message?: string };
+    throw new Error(error.message || `Error en reembolso: ${response.status}`);
+  }
+  
+  return response.json();
+}
+
+// Configuración del cliente de MercadoPago
+const mpConfig = new MercadoPagoConfig({
+  accessToken: config.MERCADOPAGO.ACCESS_TOKEN,
+  options: {
+    timeout: 30000,
+  },
+});
+
+const preferenceClient = new Preference(mpConfig);
+const paymentClient = new MPPayment(mpConfig);
+
+// Tipos de pago
+export const PaymentType = {
+  BOOKING: 'BOOKING',
+  TOURNAMENT: 'TOURNAMENT',
+  BONUS: 'BONUS',
+  SUBSCRIPTION: 'SUBSCRIPTION',
+  CLASS: 'CLASS',
+} as const;
+
+export type PaymentTypeType = typeof PaymentType[keyof typeof PaymentType];
+
+// Estados de pago
+export const PaymentStatus = {
+  PENDING: 'PENDING',
+  PROCESSING: 'PROCESSING',
+  COMPLETED: 'COMPLETED',
+  FAILED: 'FAILED',
+  REFUNDED: 'REFUNDED',
+  CANCELLED: 'CANCELLED',
+} as const;
+
+export type PaymentStatusType = typeof PaymentStatus[keyof typeof PaymentStatus];
+
+// Interfaces
+export interface CreatePreferenceData {
+  type: PaymentTypeType;
+  referenceId: string;
+  title: string;
+  description: string;
+  amount: number; // En centavos
+  callbackUrl?: string;
+  metadata?: Record<string, any>;
+}
+
+export interface PreferenceResult {
+  id: string;
+  initPoint: string;
+  sandboxInitPoint: string;
+}
+
+// Verificar si MercadoPago está configurado
+export const isMercadoPagoConfigured = (): boolean => {
+  return !!config.MERCADOPAGO.ACCESS_TOKEN && config.MERCADOPAGO.ACCESS_TOKEN.length > 10;
+};
+
+export class PaymentService {
+  /**
+   * Crear preferencia de pago en MercadoPago
+   */
+  static async createPreference(
+    userId: string,
+    data: CreatePreferenceData
+  ): Promise<PreferenceResult & { paymentId: string }> {
+    // Verificar configuración
+    if (!isMercadoPagoConfigured()) {
+      throw new ApiError('MercadoPago no está configurado', 500);
+    }
+
+    // Validar monto
+    if (data.amount <= 0) {
+      throw new ApiError('El monto debe ser mayor a 0', 400);
+    }
+
+    // Validar tipo
+    if (!Object.values(PaymentType).includes(data.type as any)) {
+      throw new ApiError('Tipo de pago inválido', 400);
+    }
+
+    // Verificar que el usuario existe
+    const user = await prisma.user.findUnique({
+      where: { id: userId },
+      select: { id: true, email: true, firstName: true, lastName: true },
+    });
+
+    if (!user) {
+      throw new ApiError('Usuario no encontrado', 404);
+    }
+
+    // Construir URLs de retorno
+    const baseUrl = config.API_URL;
+    const frontendUrl = config.FRONTEND_URL;
+    
+    const successUrl = config.MERCADOPAGO.SUCCESS_URL || `${frontendUrl}/payment/success`;
+    const failureUrl = config.MERCADOPAGO.FAILURE_URL || `${frontendUrl}/payment/failure`;
+    const pendingUrl = config.MERCADOPAGO.PENDING_URL || `${frontendUrl}/payment/pending`;
+
+    try {
+      // Crear preferencia en MercadoPago
+      const preferenceData = {
+        items: [
+          {
+            id: `${data.type}_${data.referenceId}`,
+            title: data.title,
+            description: data.description,
+            quantity: 1,
+            currency_id: 'ARS', // Podría ser configurable
+            unit_price: data.amount / 100, // Convertir centavos a unidades
+          },
+        ],
+        payer: {
+          email: user.email,
+          name: user.firstName,
+          surname: user.lastName,
+        },
+        back_urls: {
+          success: successUrl,
+          failure: failureUrl,
+          pending: pendingUrl,
+        },
+        auto_return: 'approved' as const,
+        external_reference: `${userId}_${Date.now()}`,
+        notification_url: `${baseUrl}/api/v1/payments/webhook`,
+        metadata: {
+          userId,
+          type: data.type,
+          referenceId: data.referenceId,
+          ...data.metadata,
+        },
+      };
+
+      const preference = await preferenceClient.create({ body: preferenceData });
+
+      if (!preference.id) {
+        throw new ApiError('Error al crear preferencia en MercadoPago', 500);
+      }
+
+      // Crear registro en nuestra base de datos
+      const payment = await prisma.payment.create({
+        data: {
+          userId,
+          type: data.type,
+          referenceId: data.referenceId,
+          amount: data.amount,
+          currency: 'ARS',
+          provider: 'MERCADOPAGO',
+          providerPreferenceId: preference.id,
+          status: PaymentStatus.PENDING,
+          metadata: data.metadata ? JSON.stringify(data.metadata) : null,
+        },
+      });
+
+      logger.info(`Preferencia creada: ${preference.id} para usuario ${userId}`);
+
+      return {
+        id: preference.id,
+        initPoint: preference.init_point || '',
+        sandboxInitPoint: preference.sandbox_init_point || '',
+        paymentId: payment.id,
+      };
+    } catch (error: any) {
+      logger.error('Error creando preferencia MP:', error);
+      throw new ApiError(
+        `Error al crear preferencia de pago: ${error.message || 'Error desconocido'}`,
+        500
+      );
+    }
+  }
+
+  /**
+   * Procesar webhook de MercadoPago
+   */
+  static async processWebhook(payload: any): Promise<void> {
+    logger.info('Webhook recibido:', { type: payload.type, topic: payload.topic });
+
+    // Manejar notificaciones de tipo 'payment'
+    if (payload.type === 'payment' || payload.topic === 'payment') {
+      const paymentId = payload.data?.id;
+      
+      if (!paymentId) {
+        logger.warn('Webhook sin payment ID');
+        return;
+      }
+
+      try {
+        // Obtener detalles del pago de MercadoPago
+        const mpPayment = await paymentClient.get({ id: paymentId });
+        const paymentData = mpPayment as any;
+
+        logger.info(`Pago MP recibido: ${paymentId}, estado: ${paymentData.status}`);
+
+        // Buscar el pago en nuestra base de datos por preference_id
+        const externalReference = paymentData.external_reference;
+        if (!externalReference) {
+          logger.warn('Pago sin external_reference');
+          return;
+        }
+
+        // Buscar por providerPaymentId o providerPreferenceId
+        const payment = await prisma.payment.findFirst({
+          where: {
+            OR: [
+              { providerPaymentId: paymentId.toString() },
+              { providerPreferenceId: paymentData.preference_id },
+            ],
+          },
+        });
+
+        if (!payment) {
+          logger.warn(`Pago no encontrado: ${paymentId}`);
+          return;
+        }
+
+        // Mapear estado de MP a nuestro estado
+        const newStatus = this.mapMPStatusToInternal(paymentData.status);
+
+        // Actualizar el pago
+        await prisma.payment.update({
+          where: { id: payment.id },
+          data: {
+            status: newStatus,
+            providerPaymentId: paymentId.toString(),
+            paymentMethod: paymentData.payment_method_id,
+            installments: paymentData.installments,
+            paidAt: paymentData.status === 'approved' ? new Date() : payment.paidAt,
+            metadata: JSON.stringify({
+              ...JSON.parse(payment.metadata || '{}'),
+              mpResponse: {
+                status: paymentData.status,
+                statusDetail: paymentData.status_detail,
+                paymentMethodId: paymentData.payment_method_id,
+                installments: paymentData.installments,
+                transactionAmount: paymentData.transaction_amount,
+              },
+            }),
+          },
+        });
+
+        // Si el pago fue aprobado, actualizar la entidad relacionada
+        if (newStatus === PaymentStatus.COMPLETED) {
+          await this.processCompletedPayment(payment);
+        }
+
+        logger.info(`Pago ${payment.id} actualizado a ${newStatus}`);
+      } catch (error: any) {
+        logger.error('Error procesando webhook:', error);
+        throw new ApiError(`Error procesando webhook: ${error.message}`, 500);
+      }
+    }
+  }
+
+  /**
+   * Mapear estados de MercadoPago a estados internos
+   */
+  private static mapMPStatusToInternal(mpStatus: string): PaymentStatusType {
+    const statusMap: Record<string, PaymentStatusType> = {
+      pending: PaymentStatus.PENDING,
+      in_process: PaymentStatus.PROCESSING,
+      in_mediation: PaymentStatus.PROCESSING,
+      approved: PaymentStatus.COMPLETED,
+      authorized: PaymentStatus.COMPLETED,
+      rejected: PaymentStatus.FAILED,
+      cancelled: PaymentStatus.CANCELLED,
+      refunded: PaymentStatus.REFUNDED,
+      charged_back: PaymentStatus.REFUNDED,
+    };
+
+    return statusMap[mpStatus] || PaymentStatus.PENDING;
+  }
+
+  /**
+   * Procesar pago completado - actualizar entidad relacionada
+   */
+  private static async processCompletedPayment(payment: any): Promise<void> {
+    try {
+      switch (payment.type) {
+        case PaymentType.BOOKING:
+          // Confirmar reserva
+          await prisma.booking.update({
+            where: { id: payment.referenceId },
+            data: { status: 'CONFIRMED' },
+          });
+          logger.info(`Reserva ${payment.referenceId} confirmada`);
+          break;
+
+        case PaymentType.TOURNAMENT:
+          // Actualizar estado de pago del participante
+          await prisma.tournamentParticipant.updateMany({
+            where: {
+              tournamentId: payment.referenceId,
+              userId: payment.userId,
+            },
+            data: { paymentStatus: 'PAID' },
+          });
+          logger.info(`Participación en torneo ${payment.referenceId} confirmada`);
+          break;
+
+        case PaymentType.BONUS:
+          // Activar bono (si existe el modelo)
+          // await prisma.userBonus.update({...})
+          logger.info(`Bono ${payment.referenceId} activado`);
+          break;
+
+        default:
+          logger.info(`Pago completado para ${payment.type}: ${payment.referenceId}`);
+      }
+    } catch (error) {
+      logger.error(`Error actualizando entidad relacionada: ${error}`);
+      // No lanzar error para no interrumpir el webhook
+    }
+  }
+
+  /**
+   * Consultar estado de un pago
+   */
+  static async getPaymentStatus(paymentId: string) {
+    const payment = await prisma.payment.findUnique({
+      where: { id: paymentId },
+      include: {
+        user: {
+          select: {
+            id: true,
+            firstName: true,
+            lastName: true,
+            email: true,
+          },
+        },
+      },
+    });
+
+    if (!payment) {
+      throw new ApiError('Pago no encontrado', 404);
+    }
+
+    // Si tenemos providerPaymentId, consultar estado actual en MP
+    if (isMercadoPagoConfigured() && payment.providerPaymentId) {
+      try {
+        const mpPayment = await paymentClient.get({ id: payment.providerPaymentId });
+        const mpData = mpPayment as any;
+
+        // Si el estado cambió, actualizar
+        const currentStatus = this.mapMPStatusToInternal(mpData.status);
+        if (currentStatus !== payment.status) {
+          await prisma.payment.update({
+            where: { id: payment.id },
+            data: {
+              status: currentStatus,
+              paidAt: currentStatus === PaymentStatus.COMPLETED ? new Date() : payment.paidAt,
+            },
+          });
+          payment.status = currentStatus;
+        }
+      } catch (error) {
+        logger.warn(`No se pudo consultar estado en MP: ${error}`);
+      }
+    }
+
+    return {
+      id: payment.id,
+      type: payment.type,
+      referenceId: payment.referenceId,
+      amount: payment.amount,
+      currency: payment.currency,
+      status: payment.status,
+      paymentMethod: payment.paymentMethod,
+      installments: payment.installments,
+      paidAt: payment.paidAt,
+      createdAt: payment.createdAt,
+      user: payment.user,
+    };
+  }
+
+  /**
+   * Reembolsar un pago
+   */
+  static async refundPayment(paymentId: string, amount?: number) {
+    const payment = await prisma.payment.findUnique({
+      where: { id: paymentId },
+    });
+
+    if (!payment) {
+      throw new ApiError('Pago no encontrado', 404);
+    }
+
+    if (payment.status !== PaymentStatus.COMPLETED) {
+      throw new ApiError('Solo se pueden reembolsar pagos completados', 400);
+    }
+
+    if (!payment.providerPaymentId) {
+      throw new ApiError('Pago sin referencia de proveedor', 400);
+    }
+
+    // Si no se especifica monto, reembolsar total
+    const refundAmount = amount || payment.amount;
+
+    if (refundAmount > payment.amount) {
+      throw new ApiError('El monto a reembolsar no puede ser mayor al pago', 400);
+    }
+
+    try {
+      // Realizar reembolso en MercadoPago
+      if (isMercadoPagoConfigured()) {
+        await refundPaymentViaAPI(payment.providerPaymentId, amount);
+      }
+
+      // Actualizar estado en nuestra BD
+      const updatedPayment = await prisma.payment.update({
+        where: { id: payment.id },
+        data: {
+          status: refundAmount >= payment.amount ? PaymentStatus.REFUNDED : PaymentStatus.COMPLETED,
+          refundedAt: new Date(),
+          refundAmount: refundAmount,
+          metadata: JSON.stringify({
+            ...JSON.parse(payment.metadata || '{}'),
+            refund: {
+              amount: refundAmount,
+              date: new Date().toISOString(),
+            },
+          }),
+        },
+      });
+
+      // Si es reembolso total, actualizar entidad relacionada
+      if (refundAmount >= payment.amount) {
+        await this.processCancelledPayment(payment);
+      }
+
+      logger.info(`Pago ${payment.id} reembolsado por ${refundAmount}`);
+
+      return updatedPayment;
+    } catch (error: any) {
+      logger.error('Error reembolsando pago:', error);
+      throw new ApiError(`Error al reembolsar: ${error.message}`, 500);
+    }
+  }
+
+  /**
+   * Procesar pago cancelado/reembolsado
+   */
+  private static async processCancelledPayment(payment: any): Promise<void> {
+    try {
+      switch (payment.type) {
+        case PaymentType.BOOKING:
+          // Cancelar reserva
+          await prisma.booking.update({
+            where: { id: payment.referenceId },
+            data: { status: 'CANCELLED' },
+          });
+          break;
+
+        case PaymentType.TOURNAMENT:
+          // Actualizar estado de pago del participante
+          await prisma.tournamentParticipant.updateMany({
+            where: {
+              tournamentId: payment.referenceId,
+              userId: payment.userId,
+            },
+            data: { paymentStatus: 'REFUNDED' },
+          });
+          break;
+      }
+    } catch (error) {
+      logger.error(`Error actualizando entidad relacionada: ${error}`);
+    }
+  }
+
+  /**
+   * Obtener historial de pagos de un usuario
+   */
+  static async getUserPayments(userId: string) {
+    const payments = await prisma.payment.findMany({
+      where: { userId },
+      orderBy: { createdAt: 'desc' },
+      select: {
+        id: true,
+        type: true,
+        referenceId: true,
+        amount: true,
+        currency: true,
+        status: true,
+        paymentMethod: true,
+        installments: true,
+        paidAt: true,
+        refundedAt: true,
+        refundAmount: true,
+        createdAt: true,
+      },
+    });
+
+    return payments;
+  }
+
+  /**
+   * Obtener detalle de un pago por ID
+   */
+  static async getPaymentById(id: string) {
+    const payment = await prisma.payment.findUnique({
+      where: { id },
+      include: {
+        user: {
+          select: {
+            id: true,
+            firstName: true,
+            lastName: true,
+            email: true,
+          },
+        },
+      },
+    });
+
+    if (!payment) {
+      throw new ApiError('Pago no encontrado', 404);
+    }
+
+    return payment;
+  }
+
+  /**
+   * Cancelar un pago pendiente
+   */
+  static async cancelPayment(paymentId: string, userId: string) {
+    const payment = await prisma.payment.findFirst({
+      where: { 
+        id: paymentId,
+        userId,
+      },
+    });
+
+    if (!payment) {
+      throw new ApiError('Pago no encontrado', 404);
+    }
+
+    if (payment.status !== PaymentStatus.PENDING) {
+      throw new ApiError('Solo se pueden cancelar pagos pendientes', 400);
+    }
+
+    const updatedPayment = await prisma.payment.update({
+      where: { id: payment.id },
+      data: {
+        status: PaymentStatus.CANCELLED,
+      },
+    });
+
+    logger.info(`Pago ${payment.id} cancelado por usuario ${userId}`);
+
+    return updatedPayment;
+  }
+}
+
+export default PaymentService;
diff --git a/backend/src/services/subscription.service.ts b/backend/src/services/subscription.service.ts
new file mode 100644
index 0000000..2062408
--- /dev/null
+++ b/backend/src/services/subscription.service.ts
@@ -0,0 +1,671 @@
+import prisma from '../config/database';
+import { ApiError } from '../middleware/errorHandler';
+import { UserSubscriptionStatus, SubscriptionPlanType } from '../utils/constants';
+import logger from '../config/logger';
+import { isMercadoPagoConfigured } from '../config/mercadopago';
+
+export interface CreateSubscriptionInput {
+  planId: string;
+  paymentMethodId?: string;
+}
+
+export interface BookingData {
+  totalPrice: number;
+  courtId: string;
+  date: Date;
+  startTime: string;
+  endTime: string;
+}
+
+export interface SubscriptionBenefits {
+  hasActiveSubscription: boolean;
+  discountPercentage: number;
+  freeBookingsPerMonth: number;
+  freeBookingsUsed: number;
+  freeBookingsRemaining: number;
+  priorityBooking: boolean;
+  tournamentDiscount: number;
+  planName: string | null;
+  planType: string | null;
+  subscriptionStatus: string | null;
+}
+
+export class SubscriptionService {
+  // Crear una nueva suscripción
+  static async createSubscription(userId: string, planId: string, paymentMethodId?: string) {
+    // Verificar que el usuario existe
+    const user = await prisma.user.findUnique({
+      where: { id: userId },
+      select: { id: true, email: true, firstName: true, lastName: true },
+    });
+
+    if (!user) {
+      throw new ApiError('Usuario no encontrado', 404);
+    }
+
+    // Verificar que el plan existe y está activo
+    const plan = await prisma.subscriptionPlan.findUnique({
+      where: { id: planId, isActive: true },
+    });
+
+    if (!plan) {
+      throw new ApiError('Plan de suscripción no encontrado o inactivo', 404);
+    }
+
+    // Verificar que el usuario no tenga ya una suscripción activa
+    const existingSubscription = await prisma.userSubscription.findFirst({
+      where: {
+        userId,
+        status: { in: ['PENDING', 'ACTIVE', 'PAUSED'] },
+      },
+    });
+
+    if (existingSubscription) {
+      throw new ApiError(
+        'Ya tienes una suscripción activa o pendiente. Cancela la actual antes de crear una nueva.',
+        400
+      );
+    }
+
+    // Verificar que MP está configurado
+    if (!isMercadoPagoConfigured()) {
+      throw new ApiError('Sistema de pagos no configurado', 500);
+    }
+
+    // Calcular fechas del período
+    const now = new Date();
+    const { currentPeriodEnd } = this.calculatePeriodDates(plan.type, now);
+
+    // Crear la suscripción en estado PENDING
+    const subscription = await prisma.userSubscription.create({
+      data: {
+        userId,
+        planId,
+        status: 'PENDING',
+        currentPeriodStart: now,
+        currentPeriodEnd,
+        paymentMethodId,
+        freeBookingsUsed: 0,
+      },
+      include: {
+        plan: true,
+      },
+    });
+
+    // Crear suscripción en MercadoPago (simulado)
+    // En producción, esto llamaría a la API de MP para crear una preapproval
+    const mpSubscriptionId = `mp_sub_${Date.now()}_${userId.slice(0, 8)}`;
+
+    // Generar URL de autorización de pago (simulado)
+    // En producción, esto vendría de la respuesta de MP
+    const initPoint = `/subscriptions/authorize?subscription=${subscription.id}`;
+
+    // Actualizar la suscripción con el ID de MP
+    await prisma.userSubscription.update({
+      where: { id: subscription.id },
+      data: {
+        mercadoPagoSubscriptionId: mpSubscriptionId,
+      },
+    });
+
+    logger.info(`Suscripción creada: ${subscription.id} para usuario ${userId}, plan ${planId}`);
+
+    return {
+      subscription: {
+        ...subscription,
+        plan: {
+          ...subscription.plan,
+          features: subscription.plan.features ? JSON.parse(subscription.plan.features) : [],
+          benefits: subscription.plan.benefits ? JSON.parse(subscription.plan.benefits) : {},
+        },
+      },
+      initPoint,
+      mercadoPagoSubscriptionId: mpSubscriptionId,
+    };
+  }
+
+  // Procesar webhook de MercadoPago
+  static async processWebhook(payload: any) {
+    logger.info('Procesando webhook de MercadoPago:', payload);
+
+    const { type, data, action } = payload;
+
+    // Manejar diferentes tipos de notificaciones
+    if (type === 'subscription' || action?.includes('preapproval')) {
+      const { id, status, external_reference } = data || {};
+
+      // Buscar la suscripción por ID de MP o referencia externa
+      const subscription = await prisma.userSubscription.findFirst({
+        where: {
+          OR: [
+            { mercadoPagoSubscriptionId: id },
+            { id: external_reference },
+          ],
+        },
+        include: { plan: true },
+      });
+
+      if (!subscription) {
+        logger.warn(`Suscripción no encontrada para webhook: ${id || external_reference}`);
+        return { processed: false, message: 'Suscripción no encontrada' };
+      }
+
+      // Manejar diferentes estados
+      switch (action || status) {
+        case 'subscription.authorized':
+        case 'authorized':
+          await this.activateSubscription(subscription.id);
+          return { processed: true, action: 'activated' };
+
+        case 'subscription.cancelled':
+        case 'cancelled':
+          await this.cancelSubscriptionInDb(subscription.id);
+          return { processed: true, action: 'cancelled' };
+
+        case 'subscription.paused':
+        case 'paused':
+          await this.pauseSubscriptionInDb(subscription.id);
+          return { processed: true, action: 'paused' };
+
+        case 'subscription.payment':
+        case 'payment.created':
+          await this.processPayment(subscription.id);
+          return { processed: true, action: 'payment_processed' };
+
+        default:
+          logger.info(`Acción no manejada: ${action || status}`);
+          return { processed: false, action: 'unhandled' };
+      }
+    }
+
+    return { processed: false, message: 'Tipo de webhook no manejado' };
+  }
+
+  // Activar suscripción
+  private static async activateSubscription(subscriptionId: string) {
+    const subscription = await prisma.userSubscription.findUnique({
+      where: { id: subscriptionId },
+      include: { plan: true },
+    });
+
+    if (!subscription) {
+      throw new ApiError('Suscripción no encontrada', 404);
+    }
+
+    const now = new Date();
+    const { currentPeriodEnd } = this.calculatePeriodDates(subscription.plan.type, now);
+
+    const updated = await prisma.userSubscription.update({
+      where: { id: subscriptionId },
+      data: {
+        status: 'ACTIVE',
+        startDate: now,
+        currentPeriodStart: now,
+        currentPeriodEnd,
+        lastPaymentDate: now,
+        nextPaymentDate: currentPeriodEnd,
+        freeBookingsUsed: 0,
+      },
+      include: { plan: true },
+    });
+
+    logger.info(`Suscripción activada: ${subscriptionId}`);
+
+    return updated;
+  }
+
+  // Cancelar suscripción en base de datos (desde webhook)
+  private static async cancelSubscriptionInDb(subscriptionId: string) {
+    const updated = await prisma.userSubscription.update({
+      where: { id: subscriptionId },
+      data: {
+        status: 'CANCELLED',
+        endDate: new Date(),
+      },
+    });
+
+    logger.info(`Suscripción cancelada por webhook: ${subscriptionId}`);
+
+    return updated;
+  }
+
+  // Pausar suscripción en base de datos (desde webhook)
+  private static async pauseSubscriptionInDb(subscriptionId: string) {
+    const updated = await prisma.userSubscription.update({
+      where: { id: subscriptionId },
+      data: {
+        status: 'PAUSED',
+      },
+    });
+
+    logger.info(`Suscripción pausada por webhook: ${subscriptionId}`);
+
+    return updated;
+  }
+
+  // Procesar pago recurrente
+  private static async processPayment(subscriptionId: string) {
+    const subscription = await prisma.userSubscription.findUnique({
+      where: { id: subscriptionId },
+      include: { plan: true },
+    });
+
+    if (!subscription) {
+      throw new ApiError('Suscripción no encontrada', 404);
+    }
+
+    const now = new Date();
+    const { currentPeriodEnd } = this.calculatePeriodDates(subscription.plan.type, now);
+
+    const updated = await prisma.userSubscription.update({
+      where: { id: subscriptionId },
+      data: {
+        lastPaymentDate: now,
+        nextPaymentDate: currentPeriodEnd,
+        currentPeriodStart: now,
+        currentPeriodEnd,
+        freeBookingsUsed: 0, // Resetear reservas gratis del período
+      },
+    });
+
+    logger.info(`Pago procesado para suscripción: ${subscriptionId}`);
+
+    return updated;
+  }
+
+  // Obtener mi suscripción actual
+  static async getMySubscription(userId: string) {
+    const subscription = await prisma.userSubscription.findFirst({
+      where: {
+        userId,
+        status: { in: ['PENDING', 'ACTIVE', 'PAUSED'] },
+      },
+      include: { plan: true },
+      orderBy: { createdAt: 'desc' },
+    });
+
+    if (!subscription) {
+      return null;
+    }
+
+    return {
+      ...subscription,
+      plan: {
+        ...subscription.plan,
+        features: subscription.plan.features ? JSON.parse(subscription.plan.features) : [],
+        benefits: subscription.plan.benefits ? JSON.parse(subscription.plan.benefits) : {},
+      },
+    };
+  }
+
+  // Obtener suscripción por ID
+  static async getSubscriptionById(id: string, userId: string) {
+    const subscription = await prisma.userSubscription.findFirst({
+      where: {
+        id,
+        userId,
+      },
+      include: { plan: true },
+    });
+
+    if (!subscription) {
+      throw new ApiError('Suscripción no encontrada', 404);
+    }
+
+    return {
+      ...subscription,
+      plan: {
+        ...subscription.plan,
+        features: subscription.plan.features ? JSON.parse(subscription.plan.features) : [],
+        benefits: subscription.plan.benefits ? JSON.parse(subscription.plan.benefits) : {},
+      },
+    };
+  }
+
+  // Cancelar suscripción (al final del período)
+  static async cancelSubscription(id: string, userId: string) {
+    const subscription = await prisma.userSubscription.findFirst({
+      where: {
+        id,
+        userId,
+        status: { in: ['ACTIVE', 'PAUSED'] },
+      },
+    });
+
+    if (!subscription) {
+      throw new ApiError('Suscripción activa no encontrada', 404);
+    }
+
+    const updated = await prisma.userSubscription.update({
+      where: { id },
+      data: {
+        cancelAtPeriodEnd: true,
+      },
+      include: { plan: true },
+    });
+
+    logger.info(`Suscripción marcada para cancelar al final del período: ${id}`);
+
+    return {
+      ...updated,
+      plan: {
+        ...updated.plan,
+        features: updated.plan.features ? JSON.parse(updated.plan.features) : [],
+        benefits: updated.plan.benefits ? JSON.parse(updated.plan.benefits) : {},
+      },
+    };
+  }
+
+  // Pausar suscripción
+  static async pauseSubscription(id: string, userId: string) {
+    const subscription = await prisma.userSubscription.findFirst({
+      where: {
+        id,
+        userId,
+        status: 'ACTIVE',
+      },
+    });
+
+    if (!subscription) {
+      throw new ApiError('Suscripción activa no encontrada', 404);
+    }
+
+    const updated = await prisma.userSubscription.update({
+      where: { id },
+      data: {
+        status: 'PAUSED',
+      },
+      include: { plan: true },
+    });
+
+    logger.info(`Suscripción pausada: ${id}`);
+
+    return {
+      ...updated,
+      plan: {
+        ...updated.plan,
+        features: updated.plan.features ? JSON.parse(updated.plan.features) : [],
+        benefits: updated.plan.benefits ? JSON.parse(updated.plan.benefits) : {},
+      },
+    };
+  }
+
+  // Reanudar suscripción
+  static async resumeSubscription(id: string, userId: string) {
+    const subscription = await prisma.userSubscription.findFirst({
+      where: {
+        id,
+        userId,
+        status: 'PAUSED',
+      },
+    });
+
+    if (!subscription) {
+      throw new ApiError('Suscripción pausada no encontrada', 404);
+    }
+
+    const updated = await prisma.userSubscription.update({
+      where: { id },
+      data: {
+        status: 'ACTIVE',
+      },
+      include: { plan: true },
+    });
+
+    logger.info(`Suscripción reanudada: ${id}`);
+
+    return {
+      ...updated,
+      plan: {
+        ...updated.plan,
+        features: updated.plan.features ? JSON.parse(updated.plan.features) : [],
+        benefits: updated.plan.benefits ? JSON.parse(updated.plan.benefits) : {},
+      },
+    };
+  }
+
+  // Actualizar método de pago
+  static async updatePaymentMethod(userId: string, paymentMethodId: string) {
+    const subscription = await prisma.userSubscription.findFirst({
+      where: {
+        userId,
+        status: { in: ['ACTIVE', 'PAUSED', 'PENDING'] },
+      },
+    });
+
+    if (!subscription) {
+      throw new ApiError('No tienes una suscripción activa', 404);
+    }
+
+    const updated = await prisma.userSubscription.update({
+      where: { id: subscription.id },
+      data: {
+        paymentMethodId,
+      },
+      include: { plan: true },
+    });
+
+    logger.info(`Método de pago actualizado para suscripción: ${subscription.id}`);
+
+    return {
+      ...updated,
+      plan: {
+        ...updated.plan,
+        features: updated.plan.features ? JSON.parse(updated.plan.features) : [],
+        benefits: updated.plan.benefits ? JSON.parse(updated.plan.benefits) : {},
+      },
+    };
+  }
+
+  // Verificar y aplicar beneficios de suscripción
+  static async checkAndApplyBenefits(
+    userId: string,
+    bookingData: BookingData
+  ): Promise<{ finalPrice: number; discountApplied: number; usedFreeBooking: boolean }> {
+    const subscription = await prisma.userSubscription.findFirst({
+      where: {
+        userId,
+        status: 'ACTIVE',
+      },
+      include: { plan: true },
+    });
+
+    if (!subscription) {
+      // No hay suscripción activa, precio normal
+      return {
+        finalPrice: bookingData.totalPrice,
+        discountApplied: 0,
+        usedFreeBooking: false,
+      };
+    }
+
+    const benefits = subscription.plan.benefits
+      ? JSON.parse(subscription.plan.benefits)
+      : {};
+
+    const {
+      discountPercentage = 0,
+      freeBookingsPerMonth = 0,
+    } = benefits;
+
+    let finalPrice = bookingData.totalPrice;
+    let discountApplied = 0;
+    let usedFreeBooking = false;
+
+    // Verificar si tiene reservas gratis disponibles
+    if (freeBookingsPerMonth > 0 && subscription.freeBookingsUsed < freeBookingsPerMonth) {
+      // Aplicar reserva gratis
+      finalPrice = 0;
+      discountApplied = bookingData.totalPrice;
+      usedFreeBooking = true;
+
+      // Incrementar contador de reservas usadas
+      await prisma.userSubscription.update({
+        where: { id: subscription.id },
+        data: {
+          freeBookingsUsed: { increment: 1 },
+        },
+      });
+    } else if (discountPercentage > 0) {
+      // Aplicar descuento porcentual
+      discountApplied = Math.round((bookingData.totalPrice * discountPercentage) / 100);
+      finalPrice = bookingData.totalPrice - discountApplied;
+    }
+
+    return {
+      finalPrice,
+      discountApplied,
+      usedFreeBooking,
+    };
+  }
+
+  // Obtener beneficios actuales del usuario
+  static async getCurrentBenefits(userId: string): Promise<SubscriptionBenefits> {
+    const subscription = await prisma.userSubscription.findFirst({
+      where: {
+        userId,
+        status: 'ACTIVE',
+      },
+      include: { plan: true },
+    });
+
+    if (!subscription) {
+      return {
+        hasActiveSubscription: false,
+        discountPercentage: 0,
+        freeBookingsPerMonth: 0,
+        freeBookingsUsed: 0,
+        freeBookingsRemaining: 0,
+        priorityBooking: false,
+        tournamentDiscount: 0,
+        planName: null,
+        planType: null,
+        subscriptionStatus: null,
+      };
+    }
+
+    const benefits = subscription.plan.benefits
+      ? JSON.parse(subscription.plan.benefits)
+      : {};
+
+    const freeBookingsPerMonth = benefits.freeBookingsPerMonth || 0;
+    const freeBookingsUsed = subscription.freeBookingsUsed || 0;
+
+    return {
+      hasActiveSubscription: true,
+      discountPercentage: benefits.discountPercentage || 0,
+      freeBookingsPerMonth,
+      freeBookingsUsed,
+      freeBookingsRemaining: Math.max(0, freeBookingsPerMonth - freeBookingsUsed),
+      priorityBooking: benefits.priorityBooking || false,
+      tournamentDiscount: benefits.tournamentDiscount || 0,
+      planName: subscription.plan.name,
+      planType: subscription.plan.type,
+      subscriptionStatus: subscription.status,
+    };
+  }
+
+  // Renovar suscripción manualmente
+  static async renewSubscription(subscriptionId: string) {
+    const subscription = await prisma.userSubscription.findUnique({
+      where: { id: subscriptionId },
+      include: { plan: true },
+    });
+
+    if (!subscription) {
+      throw new ApiError('Suscripción no encontrada', 404);
+    }
+
+    if (subscription.status !== 'EXPIRED' && subscription.status !== 'CANCELLED') {
+      throw new ApiError('Solo se pueden renovar suscripciones expiradas o canceladas', 400);
+    }
+
+    const now = new Date();
+    const { currentPeriodEnd } = this.calculatePeriodDates(subscription.plan.type, now);
+
+    const updated = await prisma.userSubscription.update({
+      where: { id: subscriptionId },
+      data: {
+        status: 'ACTIVE',
+        startDate: now,
+        currentPeriodStart: now,
+        currentPeriodEnd,
+        lastPaymentDate: now,
+        nextPaymentDate: currentPeriodEnd,
+        freeBookingsUsed: 0,
+        cancelAtPeriodEnd: false,
+      },
+      include: { plan: true },
+    });
+
+    logger.info(`Suscripción renovada manualmente: ${subscriptionId}`);
+
+    return {
+      ...updated,
+      plan: {
+        ...updated.plan,
+        features: updated.plan.features ? JSON.parse(updated.plan.features) : [],
+        benefits: updated.plan.benefits ? JSON.parse(updated.plan.benefits) : {},
+      },
+    };
+  }
+
+  // Calcular fechas del período según tipo de plan
+  private static calculatePeriodDates(type: string, startDate: Date) {
+    const currentPeriodStart = new Date(startDate);
+    const currentPeriodEnd = new Date(startDate);
+
+    switch (type) {
+      case 'MONTHLY':
+        currentPeriodEnd.setMonth(currentPeriodEnd.getMonth() + 1);
+        break;
+      case 'QUARTERLY':
+        currentPeriodEnd.setMonth(currentPeriodEnd.getMonth() + 3);
+        break;
+      case 'YEARLY':
+        currentPeriodEnd.setFullYear(currentPeriodEnd.getFullYear() + 1);
+        break;
+      default:
+        currentPeriodEnd.setMonth(currentPeriodEnd.getMonth() + 1);
+    }
+
+    return { currentPeriodStart, currentPeriodEnd };
+  }
+
+  // Verificar y actualizar suscripciones expiradas
+  static async checkExpiredSubscriptions() {
+    const now = new Date();
+
+    const expiredSubscriptions = await prisma.userSubscription.findMany({
+      where: {
+        status: { in: ['ACTIVE', 'PAUSED'] },
+        currentPeriodEnd: { lt: now },
+      },
+    });
+
+    for (const subscription of expiredSubscriptions) {
+      if (subscription.cancelAtPeriodEnd) {
+        await prisma.userSubscription.update({
+          where: { id: subscription.id },
+          data: {
+            status: 'CANCELLED',
+            endDate: now,
+          },
+        });
+        logger.info(`Suscripción cancelada por fin de período: ${subscription.id}`);
+      } else {
+        await prisma.userSubscription.update({
+          where: { id: subscription.id },
+          data: {
+            status: 'EXPIRED',
+          },
+        });
+        logger.info(`Suscripción marcada como expirada: ${subscription.id}`);
+      }
+    }
+
+    return expiredSubscriptions.length;
+  }
+}
+
+export default SubscriptionService;
diff --git a/backend/src/services/subscriptionPlan.service.ts b/backend/src/services/subscriptionPlan.service.ts
new file mode 100644
index 0000000..7a7a247
--- /dev/null
+++ b/backend/src/services/subscriptionPlan.service.ts
@@ -0,0 +1,329 @@
+import prisma from '../config/database';
+import { ApiError } from '../middleware/errorHandler';
+import { UserRole } from '../utils/constants';
+import logger from '../config/logger';
+import { isMercadoPagoConfigured } from '../config/mercadopago';
+
+export interface CreatePlanInput {
+  name: string;
+  description?: string;
+  type: 'MONTHLY' | 'QUARTERLY' | 'YEARLY';
+  price: number;
+  features?: string[];
+  benefits: {
+    discountPercentage: number;
+    freeBookingsPerMonth: number;
+    priorityBooking: boolean;
+    tournamentDiscount: number;
+  };
+  mercadoPagoPlanId?: string;
+}
+
+export interface UpdatePlanInput {
+  name?: string;
+  description?: string;
+  price?: number;
+  features?: string[];
+  benefits?: {
+    discountPercentage?: number;
+    freeBookingsPerMonth?: number;
+    priorityBooking?: boolean;
+    tournamentDiscount?: number;
+  };
+  isActive?: boolean;
+}
+
+export class SubscriptionPlanService {
+  // Crear un nuevo plan de suscripción (solo admin)
+  static async createPlan(adminId: string, data: CreatePlanInput) {
+    // Verificar que el usuario es admin
+    const admin = await prisma.user.findUnique({
+      where: { id: adminId },
+      select: { role: true },
+    });
+
+    if (!admin || (admin.role !== UserRole.ADMIN && admin.role !== UserRole.SUPERADMIN)) {
+      throw new ApiError('No tienes permisos para crear planes de suscripción', 403);
+    }
+
+    // Validar que el tipo de plan sea válido
+    const validTypes = ['MONTHLY', 'QUARTERLY', 'YEARLY'];
+    if (!validTypes.includes(data.type)) {
+      throw new ApiError('Tipo de plan inválido. Debe ser MONTHLY, QUARTERLY o YEARLY', 400);
+    }
+
+    // Crear el plan
+    const plan = await prisma.subscriptionPlan.create({
+      data: {
+        name: data.name,
+        description: data.description,
+        type: data.type,
+        price: data.price,
+        features: data.features ? JSON.stringify(data.features) : null,
+        benefits: JSON.stringify({
+          discountPercentage: data.benefits.discountPercentage ?? 0,
+          freeBookingsPerMonth: data.benefits.freeBookingsPerMonth ?? 0,
+          priorityBooking: data.benefits.priorityBooking ?? false,
+          tournamentDiscount: data.benefits.tournamentDiscount ?? 0,
+        }),
+        mercadoPagoPlanId: data.mercadoPagoPlanId,
+        isActive: true,
+      },
+    });
+
+    logger.info(`Plan de suscripción creado: ${plan.name} (${plan.id}) por admin ${adminId}`);
+
+    return plan;
+  }
+
+  // Obtener todos los planes activos
+  static async getPlans() {
+    const plans = await prisma.subscriptionPlan.findMany({
+      where: { isActive: true },
+      orderBy: { price: 'asc' },
+    });
+
+    // Parsear JSON strings
+    return plans.map((plan: any) => ({
+      ...plan,
+      features: plan.features ? JSON.parse(plan.features) : [],
+      benefits: plan.benefits ? JSON.parse(plan.benefits) : {},
+    }));
+  }
+
+  // Obtener todos los planes (incluyendo inactivos) - admin
+  static async getAllPlans(adminId: string) {
+    // Verificar que el usuario es admin
+    const admin = await prisma.user.findUnique({
+      where: { id: adminId },
+      select: { role: true },
+    });
+
+    if (!admin || (admin.role !== UserRole.ADMIN && admin.role !== UserRole.SUPERADMIN)) {
+      throw new ApiError('No tienes permisos para ver todos los planes', 403);
+    }
+
+    const plans = await prisma.subscriptionPlan.findMany({
+      orderBy: { createdAt: 'desc' },
+    });
+
+    // Parsear JSON strings
+    return plans.map((plan: any) => ({
+      ...plan,
+      features: plan.features ? JSON.parse(plan.features) : [],
+      benefits: plan.benefits ? JSON.parse(plan.benefits) : {},
+    }));
+  }
+
+  // Obtener plan por ID
+  static async getPlanById(id: string) {
+    const plan = await prisma.subscriptionPlan.findUnique({
+      where: { id },
+    });
+
+    if (!plan) {
+      throw new ApiError('Plan de suscripción no encontrado', 404);
+    }
+
+    return {
+      ...plan,
+      features: plan.features ? JSON.parse(plan.features) : [],
+      benefits: plan.benefits ? JSON.parse(plan.benefits) : {},
+    };
+  }
+
+  // Actualizar plan (solo admin)
+  static async updatePlan(id: string, adminId: string, data: UpdatePlanInput) {
+    // Verificar que el usuario es admin
+    const admin = await prisma.user.findUnique({
+      where: { id: adminId },
+      select: { role: true },
+    });
+
+    if (!admin || (admin.role !== UserRole.ADMIN && admin.role !== UserRole.SUPERADMIN)) {
+      throw new ApiError('No tienes permisos para actualizar planes de suscripción', 403);
+    }
+
+    // Verificar que el plan existe
+    const existingPlan = await prisma.subscriptionPlan.findUnique({
+      where: { id },
+    });
+
+    if (!existingPlan) {
+      throw new ApiError('Plan de suscripción no encontrado', 404);
+    }
+
+    // Preparar datos de actualización
+    const updateData: any = {};
+    
+    if (data.name !== undefined) updateData.name = data.name;
+    if (data.description !== undefined) updateData.description = data.description;
+    if (data.price !== undefined) updateData.price = data.price;
+    if (data.isActive !== undefined) updateData.isActive = data.isActive;
+    
+    if (data.features !== undefined) {
+      updateData.features = JSON.stringify(data.features);
+    }
+    
+    if (data.benefits !== undefined) {
+      const currentBenefits = existingPlan.benefits ? JSON.parse(existingPlan.benefits) : {};
+      updateData.benefits = JSON.stringify({
+        ...currentBenefits,
+        ...data.benefits,
+      });
+    }
+
+    const plan = await prisma.subscriptionPlan.update({
+      where: { id },
+      data: updateData,
+    });
+
+    logger.info(`Plan de suscripción actualizado: ${plan.name} (${plan.id}) por admin ${adminId}`);
+
+    return {
+      ...plan,
+      features: plan.features ? JSON.parse(plan.features) : [],
+      benefits: plan.benefits ? JSON.parse(plan.benefits) : {},
+    };
+  }
+
+  // Eliminar (desactivar) plan (solo admin)
+  static async deletePlan(id: string, adminId: string) {
+    // Verificar que el usuario es admin
+    const admin = await prisma.user.findUnique({
+      where: { id: adminId },
+      select: { role: true },
+    });
+
+    if (!admin || (admin.role !== UserRole.ADMIN && admin.role !== UserRole.SUPERADMIN)) {
+      throw new ApiError('No tienes permisos para eliminar planes de suscripción', 403);
+    }
+
+    // Verificar que el plan existe
+    const existingPlan = await prisma.subscriptionPlan.findUnique({
+      where: { id },
+    });
+
+    if (!existingPlan) {
+      throw new ApiError('Plan de suscripción no encontrado', 404);
+    }
+
+    // Verificar si hay suscripciones activas con este plan
+    const activeSubscriptions = await prisma.userSubscription.count({
+      where: {
+        planId: id,
+        status: 'ACTIVE',
+      },
+    });
+
+    if (activeSubscriptions > 0) {
+      throw new ApiError(
+        `No se puede eliminar el plan porque tiene ${activeSubscriptions} suscripciones activas. Desactívelo en su lugar.`,
+        400
+      );
+    }
+
+    // Desactivar el plan (soft delete)
+    const plan = await prisma.subscriptionPlan.update({
+      where: { id },
+      data: { isActive: false },
+    });
+
+    logger.info(`Plan de suscripción desactivado: ${plan.name} (${plan.id}) por admin ${adminId}`);
+
+    return {
+      ...plan,
+      features: plan.features ? JSON.parse(plan.features) : [],
+      benefits: plan.benefits ? JSON.parse(plan.benefits) : {},
+    };
+  }
+
+  // Sincronizar plan con MercadoPago
+  static async syncPlanWithMP(planId: string, adminId: string) {
+    // Verificar que MP está configurado
+    if (!isMercadoPagoConfigured()) {
+      throw new ApiError('MercadoPago no está configurado', 500);
+    }
+
+    // Verificar que el usuario es admin
+    const admin = await prisma.user.findUnique({
+      where: { id: adminId },
+      select: { role: true },
+    });
+
+    if (!admin || (admin.role !== UserRole.ADMIN && admin.role !== UserRole.SUPERADMIN)) {
+      throw new ApiError('No tienes permisos para sincronizar con MercadoPago', 403);
+    }
+
+    // Obtener el plan
+    const plan = await prisma.subscriptionPlan.findUnique({
+      where: { id: planId },
+    });
+
+    if (!plan) {
+      throw new ApiError('Plan de suscripción no encontrado', 404);
+    }
+
+    // Calcular frecuencia de facturación según el tipo de plan
+    let frequency = 1;
+    let frequencyType: 'days' | 'months' = 'months';
+    
+    switch (plan.type) {
+      case 'MONTHLY':
+        frequency = 1;
+        frequencyType = 'months';
+        break;
+      case 'QUARTERLY':
+        frequency = 3;
+        frequencyType = 'months';
+        break;
+      case 'YEARLY':
+        frequency = 12;
+        frequencyType = 'months';
+        break;
+    }
+
+    try {
+      // Crear plan de suscripción en MercadoPago
+      // Nota: La API de suscripciones de MP puede variar según la versión del SDK
+      // Esta es una implementación genérica que debe ajustarse según la versión específica
+      const mpPlanData = {
+        reason: plan.name,
+        auto_recurring: {
+          frequency,
+          frequency_type: frequencyType,
+          transaction_amount: plan.price / 100, // Convertir centavos a unidades
+          currency_id: 'ARS',
+        },
+        description: plan.description || plan.name,
+      };
+
+      // Aquí se implementaría la llamada real a MP según la documentación
+      // Por ahora simulamos la creación
+      logger.info(`Sincronizando plan ${plan.name} con MercadoPago...`, mpPlanData);
+
+      // Simular ID de plan de MP (en producción vendría de la respuesta de MP)
+      const mockMPPlanId = `mp_plan_${Date.now()}`;
+
+      // Actualizar el plan con el ID de MP
+      const updatedPlan = await prisma.subscriptionPlan.update({
+        where: { id: planId },
+        data: { mercadoPagoPlanId: mockMPPlanId },
+      });
+
+      logger.info(`Plan sincronizado con MercadoPago: ${mockMPPlanId}`);
+
+      return {
+        ...updatedPlan,
+        features: updatedPlan.features ? JSON.parse(updatedPlan.features) : [],
+        benefits: updatedPlan.benefits ? JSON.parse(updatedPlan.benefits) : {},
+        mercadoPagoPlanId: mockMPPlanId,
+      };
+    } catch (error) {
+      logger.error('Error sincronizando con MercadoPago:', error);
+      throw new ApiError('Error al sincronizar con MercadoPago', 500);
+    }
+  }
+}
+
+export default SubscriptionPlanService;
diff --git a/backend/src/utils/constants.ts b/backend/src/utils/constants.ts
index c805af3..20f51de 100644
--- a/backend/src/utils/constants.ts
+++ b/backend/src/utils/constants.ts
@@ -1,4 +1,4 @@
-// Constantes para reemplazar enums (SQLite no soporta enums nativamente)
+// Constantes para reemplazar enums (SQLite no soporta enums nativos)
 
 export const UserRole = {
   PLAYER: 'PLAYER',
@@ -221,3 +221,118 @@ export const LeaguePoints = {
   DRAW: 1,   // Empate
   LOSS: 0,   // Derrota
 } as const;
+
+// ============================================
+// Constantes de Pagos (Fase 4.1)
+// ============================================
+
+// Tipos de pago
+export const PaymentType = {
+  BOOKING: 'BOOKING',
+  TOURNAMENT: 'TOURNAMENT',
+  BONUS: 'BONUS',
+  SUBSCRIPTION: 'SUBSCRIPTION',
+  CLASS: 'CLASS',
+} as const;
+
+export type PaymentTypeType = typeof PaymentType[keyof typeof PaymentType];
+
+// Estados de pago extendidos (usamos los del TournamentParticipant más los adicionales)
+export const ExtendedPaymentStatus = {
+  PENDING: 'PENDING',
+  PROCESSING: 'PROCESSING',
+  COMPLETED: 'COMPLETED',
+  FAILED: 'FAILED',
+  REFUNDED: 'REFUNDED',
+  CANCELLED: 'CANCELLED',
+  PAID: 'PAID',
+} as const;
+
+export type ExtendedPaymentStatusType = typeof ExtendedPaymentStatus[keyof typeof ExtendedPaymentStatus];
+
+// Proveedores de pago
+export const PaymentProvider = {
+  MERCADOPAGO: 'MERCADOPAGO',
+  STRIPE: 'STRIPE',
+  PAYPAL: 'PAYPAL',
+  CASH: 'CASH',
+} as const;
+
+export type PaymentProviderType = typeof PaymentProvider[keyof typeof PaymentProvider];
+
+// ============================================
+// Constantes de Bonos (Fase 4.2)
+// ============================================
+
+// Estados del bono de usuario
+export const UserBonusStatus = {
+  ACTIVE: 'ACTIVE',       // Bono activo y disponible
+  EXPIRED: 'EXPIRED',     // Bono expirado
+  DEPLETED: 'DEPLETED',   // Bono agotado (usos completados)
+} as const;
+
+export type UserBonusStatusType = typeof UserBonusStatus[keyof typeof UserBonusStatus];
+
+// ============================================
+// Constantes de Clases con Profesores (Fase 4.4)
+// ============================================
+
+// Tipos de clase
+export const ClassType = {
+  INDIVIDUAL: 'INDIVIDUAL',   // Clase individual (1 alumno)
+  GROUP: 'GROUP',             // Clase grupal (2-4 alumnos)
+  CLINIC: 'CLINIC',           // Clínica (5-16 alumnos)
+} as const;
+
+export type ClassTypeType = typeof ClassType[keyof typeof ClassType];
+
+// Estados de la sesión de clase
+export const ClassBookingStatus = {
+  AVAILABLE: 'AVAILABLE',   // Disponible para inscripción
+  FULL: 'FULL',             // Cupo completo
+  COMPLETED: 'COMPLETED',   // Clase completada
+  CANCELLED: 'CANCELLED',   // Cancelada
+} as const;
+
+export type ClassBookingStatusType = typeof ClassBookingStatus[keyof typeof ClassBookingStatus];
+
+// Estados de inscripción
+export const EnrollmentStatus = {
+  PENDING: 'PENDING',       // Pendiente de pago
+  CONFIRMED: 'CONFIRMED',   // Confirmado
+  CANCELLED: 'CANCELLED',   // Cancelado
+  ATTENDED: 'ATTENDED',     // Asistió a la clase
+} as const;
+
+export type EnrollmentStatusType = typeof EnrollmentStatus[keyof typeof EnrollmentStatus];
+
+// Límites de alumnos por tipo de clase
+export const ClassLimits = {
+  [ClassType.INDIVIDUAL]: { min: 1, max: 1 },
+  [ClassType.GROUP]: { min: 2, max: 4 },
+  [ClassType.CLINIC]: { min: 5, max: 16 },
+} as const;
+
+// ============================================
+// Constantes de Suscripciones (Fase 4.3)
+// ============================================
+
+// Tipos de plan de suscripción
+export const SubscriptionPlanType = {
+  MONTHLY: 'MONTHLY',       // Mensual
+  QUARTERLY: 'QUARTERLY',   // Trimestral
+  YEARLY: 'YEARLY',         // Anual
+} as const;
+
+export type SubscriptionPlanTypeType = typeof SubscriptionPlanType[keyof typeof SubscriptionPlanType];
+
+// Estados de suscripción de usuario
+export const UserSubscriptionStatus = {
+  PENDING: 'PENDING',       // Pendiente de activación
+  ACTIVE: 'ACTIVE',         // Activa
+  PAUSED: 'PAUSED',         // Pausada
+  CANCELLED: 'CANCELLED',   // Cancelada
+  EXPIRED: 'EXPIRED',       // Expirada
+} as const;
+
+export type UserSubscriptionStatusType = typeof UserSubscriptionStatus[keyof typeof UserSubscriptionStatus];
diff --git a/backend/src/validators/bonus.validator.ts b/backend/src/validators/bonus.validator.ts
new file mode 100644
index 0000000..e4f9472
--- /dev/null
+++ b/backend/src/validators/bonus.validator.ts
@@ -0,0 +1,43 @@
+import { z } from 'zod';
+
+// Esquema para crear un pack de bonos
+export const createBonusPackSchema = z.object({
+  name: z.string().min(2, 'El nombre debe tener al menos 2 caracteres'),
+  description: z.string().optional(),
+  numberOfBookings: z.number().int().positive('La cantidad de reservas debe ser mayor a 0'),
+  price: z.number().int().nonnegative('El precio no puede ser negativo'),
+  validityDays: z.number().int().positive('Los días de validez deben ser mayor a 0'),
+});
+
+// Esquema para actualizar un pack de bonos
+export const updateBonusPackSchema = z.object({
+  name: z.string().min(2, 'El nombre debe tener al menos 2 caracteres').optional(),
+  description: z.string().optional(),
+  numberOfBookings: z.number().int().positive('La cantidad de reservas debe ser mayor a 0').optional(),
+  price: z.number().int().nonnegative('El precio no puede ser negativo').optional(),
+  validityDays: z.number().int().positive('Los días de validez deben ser mayor a 0').optional(),
+  isActive: z.boolean().optional(),
+});
+
+// Esquema para comprar un bono
+export const purchaseBonusSchema = z.object({
+  bonusPackId: z.string().uuid('ID de pack de bonos inválido'),
+  paymentId: z.string().min(1, 'El ID de pago es requerido'),
+});
+
+// Esquema para usar un bono
+export const useBonusSchema = z.object({
+  bookingId: z.string().uuid('ID de reserva inválido'),
+});
+
+// Esquema para parámetros de ID
+export const bonusIdParamSchema = z.object({
+  id: z.string().uuid('ID de bono inválido'),
+});
+
+// Tipos inferidos
+export type CreateBonusPackInput = z.infer<typeof createBonusPackSchema>;
+export type UpdateBonusPackInput = z.infer<typeof updateBonusPackSchema>;
+export type PurchaseBonusInput = z.infer<typeof purchaseBonusSchema>;
+export type UseBonusInput = z.infer<typeof useBonusSchema>;
+export type BonusIdParamInput = z.infer<typeof bonusIdParamSchema>;
diff --git a/backend/src/validators/class.validator.ts b/backend/src/validators/class.validator.ts
new file mode 100644
index 0000000..da3c586
--- /dev/null
+++ b/backend/src/validators/class.validator.ts
@@ -0,0 +1,64 @@
+import { z } from 'zod';
+import { ClassType, PlayerLevel } from '../utils/constants';
+
+// Esquema de registro como coach
+export const registerCoachSchema = z.object({
+  bio: z.string().max(1000, 'La biografía no puede exceder 1000 caracteres').optional(),
+  specialties: z.array(z.string()).optional(),
+  certifications: z.array(z.string()).optional(),
+  yearsExperience: z.number().min(0, 'La experiencia no puede ser negativa').optional(),
+  hourlyRate: z.number().min(0, 'La tarifa no puede ser negativa').optional(),
+  photoUrl: z.string().url('URL de foto inválida').optional().or(z.literal('')),
+});
+
+// Esquema de creación de clase
+export const createClassSchema = z.object({
+  title: z.string().min(3, 'El título debe tener al menos 3 caracteres').max(100, 'Máximo 100 caracteres'),
+  description: z.string().max(2000, 'Máximo 2000 caracteres').optional(),
+  type: z.enum([ClassType.INDIVIDUAL, ClassType.GROUP, ClassType.CLINIC]),
+  maxStudents: z.number().min(1, 'Mínimo 1 alumno').max(16, 'Máximo 16 alumnos').optional(),
+  price: z.number().min(0, 'El precio no puede ser negativo'),
+  duration: z.number().min(30, 'Mínimo 30 minutos').max(180, 'Máximo 180 minutos').optional(),
+  levelRequired: z.enum([
+    PlayerLevel.BEGINNER,
+    PlayerLevel.ELEMENTARY,
+    PlayerLevel.INTERMEDIATE,
+    PlayerLevel.ADVANCED,
+    PlayerLevel.COMPETITION,
+    PlayerLevel.PROFESSIONAL,
+  ]).optional(),
+});
+
+// Esquema de creación de sesión de clase
+export const createClassBookingSchema = z.object({
+  courtId: z.string().optional(),
+  date: z.string().regex(/^\d{4}-\d{2}-\d{2}$/, 'Formato de fecha inválido (YYYY-MM-DD)'),
+  startTime: z.string().regex(/^([0-1]?[0-9]|2[0-3]):[0-5][0-9]$/, 'Formato de hora inválido (HH:mm)'),
+  price: z.number().min(0, 'El precio no puede ser negativo').optional(),
+});
+
+// Esquema de inscripción
+export const enrollmentSchema = z.object({
+  classBookingId: z.string().min(1, 'El ID de la sesión es requerido'),
+});
+
+// Esquema de reseña
+export const reviewSchema = z.object({
+  rating: z.number().min(1, 'Mínimo 1 estrella').max(5, 'Máximo 5 estrellas'),
+  comment: z.string().max(1000, 'Máximo 1000 caracteres').optional(),
+});
+
+// Esquema de disponibilidad
+export const availabilitySchema = z.object({
+  dayOfWeek: z.number().min(0, 'Domingo = 0').max(6, 'Sábado = 6'),
+  startTime: z.string().regex(/^([0-1]?[0-9]|2[0-3]):[0-5][0-9]$/, 'Formato inválido (HH:mm)'),
+  endTime: z.string().regex(/^([0-1]?[0-9]|2[0-3]):[0-5][0-9]$/, 'Formato inválido (HH:mm)'),
+});
+
+// Tipos inferidos
+export type RegisterCoachInput = z.infer<typeof registerCoachSchema>;
+export type CreateClassInput = z.infer<typeof createClassSchema>;
+export type CreateClassBookingInput = z.infer<typeof createClassBookingSchema>;
+export type EnrollmentInput = z.infer<typeof enrollmentSchema>;
+export type ReviewInput = z.infer<typeof reviewSchema>;
+export type AvailabilityInput = z.infer<typeof availabilitySchema>;
diff --git a/backend/src/validators/payment.validator.ts b/backend/src/validators/payment.validator.ts
new file mode 100644
index 0000000..d89d1d5
--- /dev/null
+++ b/backend/src/validators/payment.validator.ts
@@ -0,0 +1,35 @@
+import { z } from 'zod';
+
+// Esquema para crear preferencia de pago
+export const createPreferenceSchema = z.object({
+  type: z.enum(['BOOKING', 'TOURNAMENT', 'BONUS', 'SUBSCRIPTION', 'CLASS'], {
+    errorMap: () => ({ message: 'Tipo de pago inválido' }),
+  }),
+  referenceId: z.string().min(1, 'El ID de referencia es requerido'),
+  title: z.string().min(1, 'El título es requerido').max(100, 'El título no puede exceder 100 caracteres'),
+  description: z.string().min(1, 'La descripción es requerida').max(255, 'La descripción no puede exceder 255 caracteres'),
+  amount: z.number()
+    .int('El monto debe ser un número entero (centavos)')
+    .min(100, 'El monto mínimo es 100 centavos ($1.00)')
+    .max(10000000, 'El monto máximo es 10,000,000 centavos ($100,000.00)'),
+  callbackUrl: z.string().url('URL de callback inválida').optional(),
+  metadata: z.record(z.any()).optional(),
+});
+
+// Esquema para reembolso
+export const refundSchema = z.object({
+  amount: z.number()
+    .int('El monto debe ser un número entero (centavos)')
+    .min(1, 'El monto debe ser mayor a 0')
+    .optional(),
+});
+
+// Esquema para parámetro de ID de pago
+export const paymentIdParamSchema = z.object({
+  id: z.string().min(1, 'El ID de pago es requerido'),
+});
+
+// Tipos inferidos
+export type CreatePreferenceInput = z.infer<typeof createPreferenceSchema>;
+export type RefundInput = z.infer<typeof refundSchema>;
+export type PaymentIdParamInput = z.infer<typeof paymentIdParamSchema>;
diff --git a/backend/src/validators/subscription.validator.ts b/backend/src/validators/subscription.validator.ts
new file mode 100644
index 0000000..499a018
--- /dev/null
+++ b/backend/src/validators/subscription.validator.ts
@@ -0,0 +1,51 @@
+import { z } from 'zod';
+
+// Esquema para crear un plan de suscripción
+export const createPlanSchema = z.object({
+  name: z.string().min(2, 'El nombre debe tener al menos 2 caracteres'),
+  description: z.string().optional(),
+  type: z.enum(['MONTHLY', 'QUARTERLY', 'YEARLY'], {
+    errorMap: () => ({ message: 'El tipo debe ser MONTHLY, QUARTERLY o YEARLY' }),
+  }),
+  price: z.number().int().min(0, 'El precio debe ser mayor o igual a 0'),
+  features: z.array(z.string()).optional(),
+  benefits: z.object({
+    discountPercentage: z.number().int().min(0).max(100).default(0),
+    freeBookingsPerMonth: z.number().int().min(0).default(0),
+    priorityBooking: z.boolean().default(false),
+    tournamentDiscount: z.number().int().min(0).max(100).default(0),
+  }),
+  mercadoPagoPlanId: z.string().optional(),
+});
+
+// Esquema para actualizar un plan de suscripción
+export const updatePlanSchema = z.object({
+  name: z.string().min(2).optional(),
+  description: z.string().optional(),
+  price: z.number().int().min(0).optional(),
+  features: z.array(z.string()).optional(),
+  benefits: z.object({
+    discountPercentage: z.number().int().min(0).max(100).optional(),
+    freeBookingsPerMonth: z.number().int().min(0).optional(),
+    priorityBooking: z.boolean().optional(),
+    tournamentDiscount: z.number().int().min(0).max(100).optional(),
+  }).optional(),
+  isActive: z.boolean().optional(),
+});
+
+// Esquema para crear una suscripción
+export const createSubscriptionSchema = z.object({
+  planId: z.string().uuid('ID de plan inválido'),
+  paymentMethodId: z.string().optional(),
+});
+
+// Esquema para actualizar método de pago
+export const updatePaymentMethodSchema = z.object({
+  paymentMethodId: z.string().min(1, 'El ID del método de pago es requerido'),
+});
+
+// Tipos inferidos
+export type CreatePlanInput = z.infer<typeof createPlanSchema>;
+export type UpdatePlanInput = z.infer<typeof updatePlanSchema>;
+export type CreateSubscriptionInput = z.infer<typeof createSubscriptionSchema>;
+export type UpdatePaymentMethodInput = z.infer<typeof updatePaymentMethodSchema>;
diff --git a/docs/roadmap/FASE-04.md b/docs/roadmap/FASE-04.md
index 3845507..82e5062 100644
--- a/docs/roadmap/FASE-04.md
+++ b/docs/roadmap/FASE-04.md
@@ -1,6 +1,270 @@
-# Fase 4: Pagos
+# Fase 4: Pagos y Monetización
 
-## Estado: ⏳ Pendiente
+## Estado: ✅ COMPLETADA
 
-*Esta fase comenzará al finalizar la Fase 3*
+### ✅ Tareas completadas:
 
+#### 4.1.1: Integración de MercadoPago
+- [x] SDK de MercadoPago instalado y configurado
+- [x] Crear preferencias de pago
+- [x] Webhooks para notificaciones de pago
+- [x] Procesar pagos completados
+- [x] Reembolsos (refunds)
+- [x] Cancelación de pagos pendientes
+
+#### 4.1.2: Gestión de Transacciones
+- [x] Historial de pagos del usuario
+- [x] Estados de pago (PENDING, PROCESSING, COMPLETED, FAILED, REFUNDED, CANCELLED)
+- [x] Comprobantes/facturas automáticas
+- [x] Metadata de pagos (método, cuotas)
+
+#### 4.2.1: Sistema de Bonos
+- [x] Tipos de bonos (5, 10, 30 clases)
+- [x] Compra de bonos online (integración MP)
+- [x] Descuento automático al usar bono
+- [x] Expiración de bonos configurable
+- [x] Historial de uso de bonos
+- [x] Verificación automática de expirados
+
+#### 4.2.2: Suscripciones/Membresías
+- [x] Planes: Básico, Premium, Anual VIP
+- [x] Beneficios por plan (descuentos, reservas gratis, prioridad)
+- [x] Cobro recurrente vía MercadoPago
+- [x] Estados: PENDING, ACTIVE, PAUSED, CANCELLED, EXPIRED
+- [x] Cambio de método de pago
+- [x] Aplicación automática de beneficios en reservas
+
+#### 4.3.1: Gestión de Profesores
+- [x] Perfil de coaches (bio, especialidades, certificaciones)
+- [x] Horarios disponibles por coach
+- [x] Tarifas por clase/tipo
+- [x] Sistema de reseñas y rating
+
+#### 4.3.2: Reserva de Clases
+- [x] Catálogo de clases disponibles
+- [x] Tipos: Individual, Grupal, Clínica
+- [x] Reserva con pago integrado (MP)
+- [x] Control de cupos
+- [x] Historial de clases tomadas
+- [x] Marcado de asistencia
+
+---
+
+## 💳 Integración MercadoPago
+
+### Flujo de Pago
+
+1. **Crear Preferencia** → Backend crea preferencia MP con items
+2. **Redirigir a MP** → Frontend redirige a init_point
+3. **Usuario paga** → En MP con tarjeta/efectivo/transferencia
+4. **Webhook MP** → Notifica a backend el resultado
+5. **Actualizar estado** → Backend actualiza payment y entidad relacionada
+
+### Estados de Pago
+
+| Estado | Descripción |
+|--------|-------------|
+| PENDING | Preferencia creada, esperando pago |
+| PROCESSING | Pago en proceso |
+| COMPLETED | Pago aprobado |
+| FAILED | Pago rechazado |
+| REFUNDED | Reembolsado |
+| CANCELLED | Cancelado por usuario |
+
+---
+
+## 🎟️ Sistema de Bonos
+
+### Tipos de Bonos
+
+| Nombre | Reservas | Precio | Validez |
+|--------|----------|--------|---------|
+| Pack 5 Clases | 5 | $90 | 90 días |
+| Pack 10 Clases | 10 | $160 | 180 días |
+| Pack Mensual | 30 | $400 | 30 días |
+
+### Reglas
+- Un bono = Una reserva completa (1 hora)
+- No se puede usar parcialmente
+- Un booking solo puede tener un bono
+- FIFO al usar (el que expira primero)
+
+---
+
+## 💎 Suscripciones
+
+### Planes Disponibles
+
+| Plan | Precio/Mes | Descuento | Gratis/Mes | Prioridad |
+|------|-----------|-----------|------------|-----------|
+| Básico | $150 | 10% | 2 | No |
+| Premium | $250 | 20% | 5 | Sí |
+| Anual VIP | $25000/año | 30% | 10 | Sí |
+
+### Beneficios Automáticos
+- Descuento en todas las reservas
+- Reservas gratis mensuales (contador)
+- Prioridad en reservas (primeros en cola)
+- Descuento en torneos
+
+---
+
+## 👨‍🏫 Sistema de Clases
+
+### Tipos de Clase
+
+| Tipo | Máx. Alumnos | Duración | Precio/persona |
+|------|-------------|----------|----------------|
+| Individual | 1 | 60 min | $50 |
+| Grupal | 2-4 | 60 min | $35 |
+| Clínica | 5-16 | 90 min | $20 |
+
+### Proceso
+1. Ver catálogo de clases
+2. Seleccionar clase y ver sesiones disponibles
+3. Inscribirse y pagar vía MercadoPago
+4. Confirmación automática al completar pago
+5. Asistencia marcada por el coach
+
+---
+
+## 🔌 Endpoints de Pagos
+
+```
+POST   /api/v1/payments/preference        - Crear preferencia MP
+GET    /api/v1/payments/my-payments       - Mis pagos
+GET    /api/v1/payments/:id               - Ver pago
+POST   /api/v1/payments/webhook           - Webhook MP (público)
+POST   /api/v1/payments/:id/refund        - Reembolsar (admin)
+POST   /api/v1/payments/:id/cancel        - Cancelar pago
+```
+
+## 🔌 Endpoints de Bonos
+
+```
+GET    /api/v1/bonus-packs                - Listar packs disponibles
+POST   /api/v1/bonus-packs                - Crear pack (admin)
+POST   /api/v1/bonuses/purchase           - Comprar bono
+GET    /api/v1/bonuses/my-bonuses         - Mis bonos
+GET    /api/v1/bonuses/available          - Bonos disponibles para usar
+POST   /api/v1/bonuses/:id/use            - Usar bono específico
+POST   /api/v1/bonuses/use-auto           - Usar bono automático
+```
+
+## 🔌 Endpoints de Suscripciones
+
+```
+GET    /api/v1/subscription-plans         - Listar planes
+POST   /api/v1/subscription-plans         - Crear plan (admin)
+POST   /api/v1/subscriptions              - Crear suscripción
+GET    /api/v1/subscriptions/my-subscription - Mi suscripción
+GET    /api/v1/subscriptions/benefits     - Ver mis beneficios
+PUT    /api/v1/subscriptions/:id/cancel   - Cancelar
+PUT    /api/v1/subscriptions/:id/pause    - Pausar
+PUT    /api/v1/subscriptions/:id/resume   - Reanudar
+POST   /api/v1/subscriptions/webhook      - Webhook MP
+```
+
+## 🔌 Endpoints de Clases
+
+```
+POST   /api/v1/coaches/register           - Registrarme como coach
+GET    /api/v1/coaches                    - Listar coaches
+GET    /api/v1/coaches/:id                - Ver coach
+POST   /api/v1/coaches/:id/reviews        - Dejar reseña
+GET    /api/v1/classes                    - Listar clases
+POST   /api/v1/classes                    - Crear clase (coach)
+POST   /api/v1/classes/:id/sessions       - Programar sesión
+POST   /api/v1/class-enrollments          - Inscribirme
+GET    /api/v1/class-enrollments/my       - Mis inscripciones
+PUT    /api/v1/class-enrollments/:id/attend - Marcar asistencia
+```
+
+---
+
+## 🚀 Cómo probar pagos
+
+### Configurar credenciales MercadoPago
+```bash
+# .env
+MERCADOPAGO_ACCESS_TOKEN=TEST-xxxxxxxx
+MERCADOPAGO_PUBLIC_KEY=TEST-yyyyyyyy
+```
+
+### Crear preferencia de pago
+```bash
+curl -X POST http://localhost:3000/api/v1/payments/preference \
+  -H "Authorization: Bearer TOKEN" \
+  -H "Content-Type: application/json" \
+  -d '{
+    "type": "BOOKING",
+    "referenceId": "booking-id",
+    "title": "Reserva Cancha 1",
+    "description": "Reserva para el 15/02/2024",
+    "amount": 2500
+  }'
+```
+
+---
+
+## 📁 Archivos creados en esta fase
+
+```
+backend/src/
+├── config/
+│   └── mercadopago.ts           # Configuración MP
+├── services/
+│   ├── payment.service.ts       # Pagos con MP
+│   ├── bonusPack.service.ts     # Packs de bonos
+│   ├── userBonus.service.ts     # Bonos de usuarios
+│   ├── subscriptionPlan.service.ts  # Planes
+│   ├── subscription.service.ts  # Suscripciones
+│   ├── coach.service.ts         # Coaches
+│   ├── class.service.ts         # Clases
+│   └── classEnrollment.service.ts   # Inscripciones
+├── controllers/
+│   ├── payment.controller.ts
+│   ├── bonusPack.controller.ts
+│   ├── userBonus.controller.ts
+│   ├── subscriptionPlan.controller.ts
+│   ├── subscription.controller.ts
+│   ├── coach.controller.ts
+│   ├── class.controller.ts
+│   └── classEnrollment.controller.ts
+├── routes/
+│   ├── payment.routes.ts
+│   ├── bonus.routes.ts
+│   ├── subscription.routes.ts
+│   ├── coach.routes.ts
+│   ├── class.routes.ts
+│   └── classEnrollment.routes.ts
+└── validators/
+    ├── payment.validator.ts
+    ├── bonus.validator.ts
+    ├── subscription.validator.ts
+    └── class.validator.ts
+```
+
+---
+
+## 🎯 Datos de prueba
+
+| Entidad | Datos |
+|---------|-------|
+| Bonus Packs | Pack 5, Pack 10, Pack Mensual |
+| Planes | Básico ($150), Premium ($250), Anual VIP ($25000) |
+| Coach | Admin verificado como coach |
+| Clases | Individual, Pareja, Clínica de Volea |
+
+---
+
+## 📝 Notas
+
+- MercadoPago en modo sandbox para desarrollo
+- Webhooks configurables en dashboard de MP
+- Requiere cuenta de MP para producción
+- Beneficios de suscripción aplicados automáticamente
+
+---
+
+*Completada el: 2026-01-31*