diff --git a/api/v1/serializers/payment.py b/api/v1/serializers/payment.py
index 6268a63d..0d4aec8b 100644
--- a/api/v1/serializers/payment.py
+++ b/api/v1/serializers/payment.py
@@ -46,8 +46,30 @@ class AuthorBalanceCreateSerializer(serializers.ModelSerializer):
         return AuthorBalanceSerializer(instance, context=self.context).to_representation(instance)
 
 
+class PaymentSerializer(serializers.ModelSerializer):
+    user = UserSerializer()
+
+    class Meta:
+        model = Payment
+        fields = BASE_PAYMENT_FIELDS
+        read_only_fields = (
+            'id',
+            'user',
+            'created_at',
+            'update_at',
+        )
+
+    def to_representation(self, instance):
+        if isinstance(instance, CoursePayment):
+            return CoursePaymentSerializer(instance, context=self.context).to_representation(instance)
+        elif isinstance(instance, SchoolPayment):
+            return SchoolPaymentSerializer(instance, context=self.context).to_representation(instance)
+
+
 class AuthorBalanceSerializer(serializers.ModelSerializer):
     author = UserSerializer()
+    # payment = PaymentSerializer()
+    payment = serializers.SerializerMethodField()
 
     class Meta:
         model = AuthorBalance
@@ -70,25 +92,23 @@ class AuthorBalanceSerializer(serializers.ModelSerializer):
             'payment',
         )
 
-
-class PaymentSerializer(serializers.ModelSerializer):
-    user = UserSerializer()
-
-    class Meta:
-        model = Payment
-        fields = BASE_PAYMENT_FIELDS
-        read_only_fields = (
-            'id',
-            'user',
-            'created_at',
-            'update_at',
-        )
-
-    def to_representation(self, instance):
-        if isinstance(instance, CoursePayment):
-            return CoursePaymentSerializer(instance, context=self.context).to_representation(instance)
-        elif isinstance(instance, SchoolPayment):
-            return SchoolPaymentSerializer(instance, context=self.context).to_representation(instance)
+    def get_payment(self, instance):
+        try:
+            p = instance.payment
+        except Exception:
+            return None
+        data = {
+            'id': p.id,
+            'created_at': p.created_at,
+            'amount': p.amount,
+            'data': p.data,
+        }
+        if isinstance(instance.payment, CoursePayment):
+            data['course'] = {
+                'id': p.course.id,
+                'title': p.course.title,
+            }
+        return data
 
 
 class CoursePaymentSerializer(serializers.ModelSerializer):
diff --git a/apps/user/models.py b/apps/user/models.py
index 3320adb2..fced16c5 100644
--- a/apps/user/models.py
+++ b/apps/user/models.py
@@ -93,7 +93,7 @@ class User(AbstractUser):
 
     @cached_property
     def balance(self):
-        aggregate = self.balances.filter(
+        income = self.balances.filter(
                 type=0,
                 payment__isnull=False,
                 payment__status__isnull=False
@@ -101,9 +101,13 @@ class User(AbstractUser):
             models.Sum('amount'),
             models.Sum('commission'),
         )
-        amount = aggregate.get('amount__sum') or 0
-        commission = aggregate.get('commission__sum') or 0
-        return amount - commission
+        income_amount = income.get('amount__sum') or 0
+        income_commission = income.get('commission__sum') or 0
+
+        payout = self.balances.filter(type=1, status=1).aggregate(models.Sum('amount'))
+        payout_amount = payout.get('amount__sum') or 0
+
+        return income_amount - income_commission - payout_amount
 
     @cached_property
     def bonus(self):