diff --git a/server/models/member.js b/server/models/member.js
index 4ba353e..489ffae 100644
--- a/server/models/member.js
+++ b/server/models/member.js
@@ -7,7 +7,6 @@ const __dirname = fileURLToPath(new URL(".", import.meta.url));
 
 // Import configs using dynamic imports to avoid build issues
 const getValidCircleValues = () => ["community", "founder", "practitioner"];
-const getValidContributionValues = () => ["0", "5", "15", "30", "50"];
 
 const memberSchema = new mongoose.Schema({
   email: { type: String, required: true, unique: true },
@@ -23,10 +22,14 @@ const memberSchema = new mongoose.Schema({
     enum: getValidCircleValues(),
     required: true,
   },
-  contributionTier: {
-    type: String,
-    enum: getValidContributionValues(),
+  contributionAmount: {
+    type: Number,
     required: true,
+    min: 0,
+    validate: {
+      validator: Number.isInteger,
+      message: 'contributionAmount must be a whole number',
+    },
   },
   role: {
     type: String,