diff --git a/backend/api/admin/adminController.js b/backend/api/admin/adminController.js
index e728fc9..d28b4b0 100644
--- a/backend/api/admin/adminController.js
+++ b/backend/api/admin/adminController.js
@@ -78,4 +78,27 @@ const updatePermissions = async (req, res) => {
     }
 };
 
-module.exports = { getAllBalances, addNewAccount, keysend, updatePermissions };
+// Request body:
+// ```
+// {
+//   accountName: string,
+//   allowance: number,
+// }
+// ```
+const setAccountAllowance = async (req, res) => {
+    try {
+        // TODO: Input verification logic?
+        const accountName = req.body.accountName;
+        const newAllowance = req.body.allowance;
+        const response = await adminService.setAccountAllowance(accountName, newAllowance);
+        debug.info(`Response for updating a family member's permissions: ${JSON.stringify(response)}`);
+
+        if (!response.success) res.status(500).json(response);
+        else res.status(200).json(response);
+    } catch (error) {
+        debug.error(error.stack);
+        res.status(500).json({ message: error.message, error: error.stack });
+    }
+};
+
+module.exports = { getAllBalances, addNewAccount, keysend, updatePermissions, setAccountAllowance };
diff --git a/backend/api/admin/adminService.js b/backend/api/admin/adminService.js
index 4d78bb2..25251c3 100644
--- a/backend/api/admin/adminService.js
+++ b/backend/api/admin/adminService.js
@@ -3,6 +3,9 @@ const collection = require('../../db/collection');
 const senseiAdmin = require('../../sensei/admin');
 const senseiNodes = require('../../sensei/nodes');
 
+const DOC_NAME = 'nicks-family';
+const MEMBERS_SUBCOLLECTION_NAME = 'members';
+
 const getAllBalances = async (req, res) => {
     try {
         const response = await senseiAdmin.listNodes();
@@ -19,9 +22,7 @@ const getAllBalances = async (req, res) => {
 };
 
 const updatePermissions = async (accountName, newPermissions) => {
-    const docName = 'nicks-family';
-    const subcollectionName = 'members';
-    const docRef = await collection.doc(docName).collection(subcollectionName).doc(accountName);
+    const docRef = await collection.doc(DOC_NAME).collection(MEMBERS_SUBCOLLECTION_NAME).doc(accountName);
     const doc = await docRef.get();
     if (!doc.exists) {
         const errMsg = `Firestore document "${docName}/${subcollectionName}/${accountName}" does not exist in the families collection`;
@@ -34,4 +35,18 @@ const updatePermissions = async (accountName, newPermissions) => {
     return { success: true };
 };
 
-module.exports = { getAllBalances, updatePermissions };
+const setAccountAllowance = async (accountName, newAllowance) => {
+    const docRef = await collection.doc(DOC_NAME).collection(MEMBERS_SUBCOLLECTION_NAME).doc(accountName);
+    const doc = await docRef.get();
+    if (!doc.exists) {
+        const errMsg = `Firestore document "${docName}/${subcollectionName}/${accountName}" does not exist in the families collection`;
+        debug.error(errMsg);
+        throw new Error(errMsg);
+    }
+
+    // TODO: Error handling?
+    await docRef.update({ allowance: newAllowance, "permissions.hasAllowance": true });
+    return { success: true };
+};
+
+module.exports = { getAllBalances, updatePermissions, setAccountAllowance };
diff --git a/backend/api/admin/index.js b/backend/api/admin/index.js
index dc9ce00..660491b 100644
--- a/backend/api/admin/index.js
+++ b/backend/api/admin/index.js
@@ -1,11 +1,12 @@
 const express = require('express');
 const router = express();
 
-const { getAllBalances, addNewAccount, keysend, updatePermissions } = require('./adminController');
+const { getAllBalances, addNewAccount, keysend, updatePermissions, setAccountAllowance } = require('./adminController');
 
 router.get('/balances', getAllBalances);
 router.post('/add', addNewAccount);
 router.post('/transfer', keysend);
 router.post('/permissions', updatePermissions)
+router.post('/allowance', setAccountAllowance)
 
 module.exports = router;