diff --git a/packages/join-block/readme.txt b/packages/join-block/readme.txt
index 32a623f..e605749 100644
--- a/packages/join-block/readme.txt
+++ b/packages/join-block/readme.txt
@@ -30,6 +30,26 @@ Features:
     2. Mailchimp
     3. Action Network
 
+== ChargeBee setup ==
+
+To use ChargeBee, you must configure the payment plan names in the Join Flow settings
+to match the price IDs in the ChargeBee back-end.
+
+Currently, this requires logging in to the ChargeBee dashboard, creating a
+subscription, and setting a price for the desired currency. The price details
+for the selected currency will have an ID. Copy and paste this ID into the
+name of the membership plan in the Join Flow backend.
+
+To support an additional donation in ChargeBee, create two more products:
+- an addon called "Additional Donation", with a price in the desired
+  currency called "additional_donation_monthly".
+- a charge called "Additional Donation", with a price in the desired
+  currency called "additional_donation_single".
+
+== Contact Us ==
+
+Need help? Contact us at [hello@commonknowledge.coop](mailto:hello@commonknowledge.coop).
+
 == Changelog ==
 
 = 1.0 =
diff --git a/packages/join-block/src/Services/JoinService.php b/packages/join-block/src/Services/JoinService.php
index 0ae60f6..7929951 100644
--- a/packages/join-block/src/Services/JoinService.php
+++ b/packages/join-block/src/Services/JoinService.php
@@ -508,7 +508,8 @@ private static function handleChargebeeSubscription($data, $customer)
         $planId = sanitize_title($data['membership']);
         $chargebeeSubscriptionPayload["subscription_items"] = [
             [
-                "item_price_id" => $planId
+                "item_price_id" => $planId,
+                "unit_price" => (int)$data['membershipPlan']['amount'] * 100
             ]
         ];
 
diff --git a/packages/join-flow/src/services/rest-resource.service.ts b/packages/join-flow/src/services/rest-resource.service.ts
index 7ce0f79..d1221e7 100644
--- a/packages/join-flow/src/services/rest-resource.service.ts
+++ b/packages/join-flow/src/services/rest-resource.service.ts
@@ -1,34 +1,11 @@
 import { get as getEnv } from '../env';
 
-type membershipToChargebeePlanMap = {
-  [key: string]: string;
-};
-
-/*
-  All membership types map exactly to one Chargebee plan, except for suggested.
-  
-  Suggested is a combination of a membership_monthly_individual plan and a £7 donation.
-  
-  See packages/join-block/lib/services/join_service.php for details.
-*/
-const membershipToChargebeePlanMap: membershipToChargebeePlanMap = {
-  suggested: "suggested",
-  standard: "membership_monthly_individual",
-  lowWaged: "membership_annual_individual_low_waged",
-  student: "membership_annual_student",
-  unwaged: "membership_annual_unwaged"
-};
-
-function membershipToPlan(membership: string): string {
-  return membershipToChargebeePlanMap[membership];
-}
-
 export const usePostResource = <Params, Result = {}>(resource: string) => {
   return async (data: Params): Promise<Result> => {
     const endpoint = "join/v1" + resource;
 
     // @ts-ignore
-    data.planId = membershipToPlan(data.membership);
+    data.planId = data.membership;
 
     const baseUrl = getEnv('WP_REST_API').replace(/\/$/, ''); // trim trailing slash
     const res = await fetch(`${baseUrl}/${endpoint}`, {