diff --git a/app/cabinet/routes/websocket.py b/app/cabinet/routes/websocket.py
index 8ea04ae1..c9f2ed9e 100644
--- a/app/cabinet/routes/websocket.py
+++ b/app/cabinet/routes/websocket.py
@@ -374,6 +374,25 @@ async def notify_user_subscription_renewed(
     )
 
 
+async def notify_user_devices_purchased(
+    user_id: int,
+    devices_added: int,
+    new_device_limit: int,
+    amount_kopeks: int,
+) -> None:
+    """Уведомить пользователя о покупке устройств."""
+    await cabinet_ws_manager.send_to_user(
+        user_id,
+        {
+            'type': 'subscription.devices_purchased',
+            'devices_added': devices_added,
+            'new_device_limit': new_device_limit,
+            'amount_kopeks': amount_kopeks,
+            'amount_rubles': amount_kopeks / 100,
+        },
+    )
+
+
 # ============================================================================
 # Уведомления об автопродлении
 # ============================================================================
diff --git a/app/services/subscription_auto_purchase_service.py b/app/services/subscription_auto_purchase_service.py
index 9147b5a5..20fe7f1f 100644
--- a/app/services/subscription_auto_purchase_service.py
+++ b/app/services/subscription_auto_purchase_service.py
@@ -1248,6 +1248,22 @@ async def _auto_add_devices(
         price_kopeks,
     )
 
+    # WebSocket уведомление для кабинета
+    try:
+        from app.cabinet.routes.websocket import notify_user_devices_purchased
+
+        await notify_user_devices_purchased(
+            user_id=user.id,
+            devices_added=devices_to_add,
+            new_device_limit=subscription.device_limit,
+            amount_kopeks=price_kopeks,
+        )
+    except Exception as ws_error:
+        logger.warning(
+            '⚠️ Автопокупка устройств: не удалось отправить WebSocket уведомление: %s',
+            ws_error,
+        )
+
     # Уведомление пользователю
     if bot and user.telegram_id:
         texts = get_texts(getattr(user, 'language', 'ru'))