diff --git a/ihatemoney/models.py b/ihatemoney/models.py
index 212f8949..8c28c9c0 100644
--- a/ihatemoney/models.py
+++ b/ihatemoney/models.py
@@ -114,12 +114,13 @@ class Project(db.Model):
         balances, should_pay, should_receive = (defaultdict(int) for time in (1, 2, 3))
 
         for bill in self.get_bills_unordered().all():
-            should_receive[bill.payer.id] += bill.converted_amount
-            total_weight = sum(ower.weight for ower in bill.owers)
-            for ower in bill.owers:
-                should_pay[ower.id] += (
-                    ower.weight * bill.converted_amount / total_weight
-                )
+            if not bill.archive:
+                should_receive[bill.payer.id] += bill.converted_amount
+                total_weight = sum(ower.weight for ower in bill.owers)
+                for ower in bill.owers:
+                    should_pay[ower.id] += (
+                        ower.weight * bill.converted_amount / total_weight
+                    )
 
         for person in self.members:
             balance = should_receive[person.id] - should_pay[person.id]