diff --git a/budget/models.py b/budget/models.py
index 8f57ffd..1f3fa4f 100644
--- a/budget/models.py
+++ b/budget/models.py
@@ -45,21 +45,19 @@ class Project(db.Model):
 
         for person in self.members:
             balance = should_receive[person] - should_pay[person]
-            balances[person] = round(balance, 2)
+            balances[person.id] = round(balance, 2)
 
         return balances
 
-    def settle_bill(self):
+    def settle_bills(self):
         """Return a list of transactions that could be made to settle the bill"""
-        balances = self.balance
-        credits, debts = list(), list()
-        transactions = list()
+        credits, debts, transactions = [],[],[]
         # Create lists of credits and debts
-        for person in balances.keys():
-            if balances[person] > 0:
-                credits.append({"person": person, "balance": balances[person]})
-            elif balances[person] < 0:
-                debts.append({"person": person, "balance": -balances[person]})
+        for person in self.members:
+            if self.balance[person.id] > 0:
+                credits.append({"person": person, "balance": self.balance[person.id]})
+            elif self.balance[person.id] < 0:
+                debts.append({"person": person, "balance": -self.balance[person.id]})
         # Try and find exact matches
         for credit in credits:
             match = self.exactmatch(credit["balance"], debts)
@@ -83,7 +81,7 @@ class Project(db.Model):
     def exactmatch(self, credit, debts):
         """Recursively try and find subsets of 'debts' whose sum is equal to credit"""
         if not debts:
-            return []
+            return None
         if debts[0]["balance"] > credit:
             return self.exactmatch(credit, debts[1:])
         elif debts[0]["balance"] == credit:
diff --git a/budget/templates/list_bills.html b/budget/templates/list_bills.html
index a39a78a..ee97624 100644
--- a/budget/templates/list_bills.html
+++ b/budget/templates/list_bills.html
@@ -61,20 +61,20 @@
     <div id="table_overflow">
     <table class="balance table">
     {% set balance = g.project.balance %}
-    {% for member in g.project.members | sort(attribute='name') if member.activated or balance[member] != 0 %}
-    <tr id="bal-member-{{ member }}" action={% if member.activated %}delete{% else %}reactivate{% endif %}>
+    {% for member in g.project.members | sort(attribute='name') if member.activated or balance[member.id] != 0 %}
+    <tr id="bal-member-{{ member.id }}" action={% if member.activated %}delete{% else %}reactivate{% endif %}>
         <td class="balance-name">{{ member.name }}</td>
         {% if member.activated %}
         <td>
-            <form class="action delete" action="{{ url_for(".remove_member", member_id=member) }}" method="POST">
+            <form class="action delete" action="{{ url_for(".remove_member", member_id=member.id) }}" method="POST">
                 <button type="submit">{{ _("delete") }}</button></form></td>
         {% else %}
         <td>
-            <form class="action reactivate" action="{{ url_for(".reactivate", member_id=member) }}" method="POST">
+            <form class="action reactivate" action="{{ url_for(".reactivate", member_id=member.id) }}" method="POST">
                 <button type="submit">{{ _("reactivate") }}</button></form></td>
         {% endif %}
-        <td class="balance-value {% if balance[member] > 0 %}positive{% elif balance[member] < 0 %}negative{% endif %}">
-            {% if balance[member] > 0 %}+{% endif %}{{ balance[member] }}
+        <td class="balance-value {% if balance[member] > 0 %}positive{% elif balance[member.id] < 0 %}negative{% endif %}">
+            {% if balance[member.id] > 0 %}+{% endif %}{{ balance[member.id] }}
         </td>
     </tr>
     {% endfor %}
diff --git a/budget/templates/settle_bill.html b/budget/templates/settle_bills.html
similarity index 71%
rename from budget/templates/settle_bill.html
rename to budget/templates/settle_bills.html
index d04ff63..309642a 100644
--- a/budget/templates/settle_bill.html
+++ b/budget/templates/settle_bills.html
@@ -5,7 +5,7 @@
 {% endblock %}
 {% block navbar %}
     <li><a href="{{ url_for(".list_bills") }}">{{ _("Bills") }}</a></li>
-    <li class="active"><a href="{{ url_for(".settle_bill") }}">{{ _("Settle") }}</a></li>
+    <li class="active"><a href="{{ url_for(".settle_bills") }}">{{ _("Settle") }}</a></li>
 {% endblock %}
 
 {% block sidebar %}
@@ -14,11 +14,11 @@
     <div id="table_overflow">
     <table class="balance table">
     {% set balance = g.project.balance %}
-    {% for member in g.project.members | sort(attribute='name') if member.activated or balance[member] != 0 %}
-    <tr id="bal-member-{{ member }}" action={% if member.activated %}delete{% else %}reactivate{% endif %}>
+    {% for member in g.project.members | sort(attribute='name') if member.activated or balance[member.id] != 0 %}
+    <tr id="bal-member-{{ member.id }}" action={% if member.activated %}delete{% else %}reactivate{% endif %}>
         <td class="balance-name">{{ member.name }}</td>
-        <td class="balance-value {% if balance[member] > 0 %}positive{% elif balance[member] < 0 %}negative{% endif %}">
-            {% if balance[member] > 0 %}+{% endif %}{{ balance[member] }}
+        <td class="balance-value {% if balance[member.id] > 0 %}positive{% elif balance[member.id] < 0 %}negative{% endif %}">
+            {% if balance[member.id] > 0 %}+{% endif %}{{ balance[member.id] }}
         </td>
     </tr>
     {% endfor %}
diff --git a/budget/tests.py b/budget/tests.py
index d848112..983b352 100644
--- a/budget/tests.py
+++ b/budget/tests.py
@@ -436,9 +436,9 @@ class BudgetTestCase(TestCase):
 
         balance = models.Project.query.get("raclette").balance
         result = {}
-        result[models.Project.query.get("raclette").members[0]] = 8.12
-        result[models.Project.query.get("raclette").members[1]] = 0.0
-        result[models.Project.query.get("raclette").members[2]] = -8.12
+        result[models.Project.query.get("raclette").members[0].id] = 8.12
+        result[models.Project.query.get("raclette").members[1].id] = 0.0
+        result[models.Project.query.get("raclette").members[2].id] = -8.12
         self.assertDictEqual(balance, result)
 
     def test_edit_project(self):
@@ -472,7 +472,7 @@ class BudgetTestCase(TestCase):
 
     def test_settle_page(self):
         self.post_project("raclette")
-        response = self.app.get("/raclette/settle_bill")
+        response = self.app.get("/raclette/settle_bills")
         self.assertEqual(response.status_code, 200)
 
     def test_settle(self):
@@ -510,7 +510,7 @@ class BudgetTestCase(TestCase):
             'amount': '10',
         })
         project  = models.Project.query.get('raclette')
-        transactions = project.settle_bill()
+        transactions = project.settle_bills()
         members = defaultdict(int)
         #We should have the same values between transactions and project balances
         for t in transactions:
@@ -518,7 +518,7 @@ class BudgetTestCase(TestCase):
             members[t['payer']]+=t['amount']
         balance = models.Project.query.get("raclette").balance
         for m, a in members.items():
-            self.assertEqual(a, balance[m])
+            self.assertEqual(a, balance[m.id])
         return
         
 
diff --git a/budget/web.py b/budget/web.py
index a9f70cb..f975587 100644
--- a/budget/web.py
+++ b/budget/web.py
@@ -383,11 +383,11 @@ def change_lang(lang):
     return redirect(request.headers.get('Referer') or url_for('.home'))
 
 
-@main.route("/<project_id>/settle_bill")
+@main.route("/<project_id>/settle_bills")
 def settle_bill():
     """Compute the sum each one have to pay to each other and display it"""
-    bills = g.project.settle_bill()
-    return render_template("settle_bill.html", bills=bills)
+    bills = g.project.settle_bills()
+    return render_template("settle_bills.html", bills=bills)
 
 
 @main.route("/<project_id>/archives/create", methods=["GET", "POST"])