diff --git a/pos/services/pos_engine.py b/pos/services/pos_engine.py
index 619e579..dcc6962 100644
--- a/pos/services/pos_engine.py
+++ b/pos/services/pos_engine.py
@@ -18,6 +18,7 @@ from services.inventory_engine import (
     record_operation,
     get_stock,
 )
+from services.accounting_engine import record_sale_entry, record_cancellation_entry
 
 
 def _to_dec(val):
@@ -369,6 +370,20 @@ def process_sale(conn, sale_data):
 
     cur.close()
 
+    # Auto-generate accounting entry (non-blocking)
+    try:
+        record_sale_entry(conn, {
+            'id': sale_id,
+            'sale_type': sale_type,
+            'total': totals['total'],
+            'tax_total': totals['tax_total'],
+            'subtotal': totals['subtotal'] - totals['discount_total'],
+            'cost_total': sum(item.get('unit_cost', 0) * item['quantity'] for item in enriched_items),
+            'payment_method': payment_method,
+        })
+    except Exception:
+        pass  # Accounting errors never block sales
+
     return {
         'id': sale_id,
         'branch_id': branch_id,
@@ -464,6 +479,19 @@ def cancel_sale(conn, sale_id, reason):
         WHERE id = %s
     """, (f"CANCELADA: {reason}", sale_id))
 
+    # Reverse accounting entry (non-blocking)
+    try:
+        # Fetch tax_total for the reversal entry
+        cur.execute("SELECT tax_total FROM sales WHERE id = %s", (sale_id,))
+        _tax_row = cur.fetchone()
+        record_cancellation_entry(conn, {
+            'id': sale_id,
+            'total': float(s_total),
+            'tax_total': float(_tax_row[0]) if _tax_row else 0.0,
+        })
+    except Exception:
+        pass  # Accounting errors never block cancellations
+
     # Reverse customer credit balance if credit sale
     if s_type == 'credit' and s_cust_id:
         cur.execute("""