diff --git a/server/models/member.js b/server/models/member.js
index f34abd6..4ba353e 100644
--- a/server/models/member.js
+++ b/server/models/member.js
@@ -40,6 +40,11 @@ const memberSchema = new mongoose.Schema({
   },
   helcimCustomerId: String,
   helcimSubscriptionId: String,
+  billingCadence: {
+    type: String,
+    enum: ['monthly', 'annual'],
+    default: 'monthly',
+  },
   paymentMethod: {
     type: String,
     enum: ["card", "bank", "none"],