diff --git a/apps/payment/models.py b/apps/payment/models.py
index a11439c4..4e157d4a 100644
--- a/apps/payment/models.py
+++ b/apps/payment/models.py
@@ -228,8 +228,8 @@ class Payment(PolymorphicModel):
         ]
 
     def save(self, *args, **kwargs):
+        amount_data = Payment.calc_amount(payment=self)
         if not self.is_paid():
-            amount_data = Payment.calc_amount(payment=self)
             if not self.bonus:
                 self.amount = amount_data.get('amount')
             if isinstance(self, SchoolPayment):