diff --git a/code/haitiwater/apps/financial/models.py b/code/haitiwater/apps/financial/models.py
index 71a8362..4b680c5 100644
--- a/code/haitiwater/apps/financial/models.py
+++ b/code/haitiwater/apps/financial/models.py
@@ -1,3 +1,24 @@
 from django.db import models
+from ..consumers.models import Consumer
+from ..water_network.models import Element
 
-# Create your models here.
+
+class Invoice(models.Model):
+
+    consumer = models.ForeignKey(Consumer, verbose_name="Consommateur",
+                                 related_name="invoices", on_delete=models.CASCADE)
+    water_outlet = models.ForeignKey(Element, verbose_name="Sortie d'eau",
+                                     related_name="invoices", on_delete=models.CASCADE)
+    creation = models.DateField("Date de la facture", auto_now=True)
+    expiration = models.DateField("Date d'expiration de la souscription")
+    amount = models.FloatField("Montant")
+
+
+class Payment(models.Model):
+
+    consumer = models.ForeignKey(Consumer, verbose_name="Consommateur",
+                                 related_name="payments", on_delete=models.CASCADE)
+    water_outlet = models.ForeignKey(Element, verbose_name="Sortie d'eau",
+                                     related_name="payments", on_delete=models.CASCADE)
+    date = models.DateField("Date de la facture", auto_now=True)
+    amount = models.FloatField("Montant")
diff --git a/code/haitiwater/apps/water_network/models.py b/code/haitiwater/apps/water_network/models.py
index 90d93d0..e19ab3d 100644
--- a/code/haitiwater/apps/water_network/models.py
+++ b/code/haitiwater/apps/water_network/models.py
@@ -69,6 +69,8 @@ class Element(models.Model):
     status = models.CharField("État", max_length=20, choices=[(i.name, i.value) for i in ElementStatus])
     zone = models.ForeignKey(Zone, verbose_name="Zone de l'élément", related_name="elements", on_delete=models.CASCADE, default=1)
     location = models.CharField("Localisation", max_length=50)
+    price = models.FloatField("Prix de la souscription", default=0)
+    validity = models.IntegerField("Nombre de mois de validité de la souscription", default=12)
 
     def __str__(self):
         return self.name