diff --git a/shop/models.py b/shop/models.py
index 1fac3efd..e0b36d42 100644
--- a/shop/models.py
+++ b/shop/models.py
@@ -295,7 +295,7 @@ class CreditNote(CreatedUpdatedModel):
 
     @property
     def vat(self):
-        return Decimal(self.total*Decimal(0.2))
+        return Decimal(self.amount*Decimal(0.2))
 
     @property
     def filename(self):