diff --git a/src/sentry/uptime/subscriptions/subscriptions.py b/src/sentry/uptime/subscriptions/subscriptions.py
index 28f5ac75a0a6c8..5aeaf423150a82 100644
--- a/src/sentry/uptime/subscriptions/subscriptions.py
+++ b/src/sentry/uptime/subscriptions/subscriptions.py
@@ -401,6 +401,7 @@ def delete_uptime_subscriptions_for_project(
 
 def delete_project_uptime_subscription(subscription: ProjectUptimeSubscription):
     uptime_subscription = subscription.uptime_subscription
+    quotas.backend.disable_seat(DataCategory.UPTIME, subscription)
     subscription.delete()
     remove_uptime_subscription_if_unused(uptime_subscription)
 
diff --git a/tests/sentry/uptime/subscriptions/test_subscriptions.py b/tests/sentry/uptime/subscriptions/test_subscriptions.py
index 2b13eaf86ef8d8..24638af24e1414 100644
--- a/tests/sentry/uptime/subscriptions/test_subscriptions.py
+++ b/tests/sentry/uptime/subscriptions/test_subscriptions.py
@@ -644,7 +644,8 @@ def test_delete_other_modes(self):
 
 
 class DeleteProjectUptimeSubscriptionTest(UptimeTestCase):
-    def test_other_subscriptions(self):
+    @mock.patch("sentry.quotas.backend.disable_seat")
+    def test_other_subscriptions(self, mock_disable_seat):
         other_project = self.create_project()
         proj_sub = get_or_create_project_uptime_subscription(
             self.project,
@@ -673,8 +674,10 @@ def test_other_subscriptions(self):
             proj_sub.refresh_from_db()
 
         assert UptimeSubscription.objects.filter(id=other_sub.uptime_subscription_id).exists()
+        mock_disable_seat.assert_called_with(DataCategory.UPTIME, proj_sub)
 
-    def test_single_subscriptions(self):
+    @mock.patch("sentry.quotas.backend.disable_seat")
+    def test_single_subscriptions(self, mock_disable_seat):
         proj_sub = get_or_create_project_uptime_subscription(
             self.project,
             self.environment,
@@ -691,6 +694,7 @@ def test_single_subscriptions(self):
 
         with pytest.raises(UptimeSubscription.DoesNotExist):
             proj_sub.uptime_subscription.refresh_from_db()
+        mock_disable_seat.assert_called_with(DataCategory.UPTIME, proj_sub)
 
 
 class RemoveUptimeSubscriptionIfUnusedTest(UptimeTestCase):