diff --git a/billing/tests.py b/billing/tests.py
index 90d83fd..d5a2b74 100644
--- a/billing/tests.py
+++ b/billing/tests.py
@@ -27,8 +27,10 @@ from payments import get_payment_model, RedirectNeeded, PaymentStatus
 
 from accounts.tests import register_util, login_util
 from dash.tests import create_configurations, create_instance_util
+from dash.models import Instance
 
 from .models import Payment
+from .utils import payment_fullfilled
 
 
 class BillingTest(TestCase):
@@ -49,6 +51,8 @@ class BillingTest(TestCase):
             t=self, c=c, instance_name=instance_name, config=self.instance_config[0]
         )
 
+        instance = Instance.objects.get(name=instance_name)
+
         payment_uri = reverse("billing.invoice.generate", args=(instance_name,))
 
         # generate invoice
@@ -78,11 +82,17 @@ class BillingTest(TestCase):
         resp = c.get(reverse("billing.invoice.pending"))
         self.assertEqual(str.encode(invoice_uri) in resp.content, True)
 
+        self.assertEqual(payment_fullfilled(instance=instance), False)
+
         # simulate payment. There's probably a better way to do this
         payment = get_payment_model().objects.get(paid_by=self.user)
         payment.status = PaymentStatus.CONFIRMED
         payment.save()
 
+        self.assertEqual(payment_fullfilled(instance=instance), True)
+
+        #
+
         # check if paid invoice is listed in paid invoice list view
         resp = c.get(reverse("billing.invoice.paid"))
         self.assertEqual(str.encode(invoice_uri) in resp.content, True)
diff --git a/billing/utils.py b/billing/utils.py
new file mode 100644
index 0000000..9693de7
--- /dev/null
+++ b/billing/utils.py
@@ -0,0 +1,33 @@
+# Copyright © 2022 Aravinth Manivannan <realaravinth@batsense.net>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+from datetime import datetime, timedelta, timezone
+from payments import get_payment_model, RedirectNeeded, PaymentStatus
+from django.contrib.auth.models import User
+from django.shortcuts import get_object_or_404
+
+from dash.models import Instance
+
+
+def payment_fullfilled(instance: Instance) -> bool:
+    Payment = get_payment_model()
+    now = datetime.now(tz=timezone.utc)
+    delta = now - timedelta(seconds=(60 * 60 * 24 * 30))  # one month
+
+    payment = None
+    for p in Payment.objects.filter(date__gt=(delta), instance_name=instance.name):
+        if p.status == PaymentStatus.CONFIRMED:
+            return True
+
+    return False