diff --git a/code/haitiwater/apps/api/get_table.py b/code/haitiwater/apps/api/get_table.py
index d74b6ef..04e26bf 100644
--- a/code/haitiwater/apps/api/get_table.py
+++ b/code/haitiwater/apps/api/get_table.py
@@ -187,14 +187,13 @@ def get_payment_elements(request):
 
 def get_payment_details(request):
     consumer_id = request.GET.get("id", None)
-    balance = 0  # TODO balance in view to optimize
+    from ..consumers.models import Consumer
+    consumer = Consumer.objects.filter(id=consumer_id).first()
+    balance = consumer.get_balance()
     validity = None
     for elem in Invoice.objects.filter(consumer_id=consumer_id):
-        balance -= elem.amount
         if not validity or elem.expiration > validity:
             validity = elem.expiration
-    for elem in Payment.objects.filter(consumer_id=consumer_id):
-        balance += elem.amount
 
     return balance, str(validity)
 
diff --git a/code/haitiwater/apps/consumers/models.py b/code/haitiwater/apps/consumers/models.py
index 14ab627..8697129 100644
--- a/code/haitiwater/apps/consumers/models.py
+++ b/code/haitiwater/apps/consumers/models.py
@@ -22,12 +22,15 @@ class Consumer(models.Model):
         return self.first_name + " " + self.last_name
 
     def descript(self):
-        view = VirtualConsumersBalance.objects.filter(relevant_model=self.id).first()
         tab = [self.id, self.last_name, self.first_name, self.get_gender_display(),
                self.location, self.get_phone_number(),
-               self.household_size, self.water_outlet.name, view.balance, self.water_outlet.zone.name]
+               self.household_size, self.water_outlet.name, self.get_balance(), self.water_outlet.zone.name]
         return tab
 
+    def get_balance(self):
+        view = VirtualConsumersBalance.objects.filter(relevant_model=self.id).first()
+        return view.payed - view.due
+
     def get_phone_number(self):
         return self.phone_number if self.phone_number != "0" else "Non spécifié"
 
@@ -61,7 +64,9 @@ class Consumer(models.Model):
 
 class VirtualConsumersBalance(models.Model):
     relevant_model = models.BigIntegerField("Id", primary_key=True)
-    balance = models.FloatField("Balance", null=False, default=0)
+    payed = models.FloatField("Total payé", null=False, default=0)
+    due = models.FloatField("Total dû", null=False, default=0)
+
 
     class Meta:
         managed = False
diff --git a/code/haitiwater/views.sql b/code/haitiwater/views.sql
index 61461f9..d9597d3 100644
--- a/code/haitiwater/views.sql
+++ b/code/haitiwater/views.sql
@@ -45,5 +45,8 @@ CREATE OR REPLACE VIEW public.consumer_virtualtotalbalance AS
     c.id AS "relevant_model",
     ( SELECT COALESCE(SUM(p.amount), 0)
       FROM financial_payment p
-      WHERE p.consumer_id = c.id) AS "balance"
+      WHERE p.consumer_id = c.id) AS "payed",
+    ( SELECT COALESCE(SUM(i.amount), 0)
+      FROM financial_invoice i
+      WHERE i.consumer_id = c.id) AS "due"
   FROM consumers_consumer c;
\ No newline at end of file