diff --git a/test/api/v3/unit/libs/amazonPayments.test.js b/test/api/v3/unit/libs/amazonPayments.test.js
index e4e593e7d7..a22abb90a1 100644
--- a/test/api/v3/unit/libs/amazonPayments.test.js
+++ b/test/api/v3/unit/libs/amazonPayments.test.js
@@ -383,6 +383,72 @@ describe('Amazon Payments', () => {
         groupId,
       });
     });
+
+    it('subscribes with amazon with price to existing users', async () => {
+      user = new User();
+      user.guilds.push(groupId);
+      await user.save();
+      group.memberCount = 2;
+      await group.save();
+      sub.key = 'group_monthly';
+      sub.price = 9;
+      amount = 12;
+
+      await amzLib.subscribe({
+        billingAgreementId,
+        sub,
+        coupon,
+        user,
+        groupId,
+        headers,
+      });
+
+      expect(amazonSetBillingAgreementDetailsSpy).to.be.calledOnce;
+      expect(amazonSetBillingAgreementDetailsSpy).to.be.calledWith({
+        AmazonBillingAgreementId: billingAgreementId,
+        BillingAgreementAttributes: {
+          SellerNote: amzLib.constants.SELLER_NOTE_SUBSCRIPTION,
+          SellerBillingAgreementAttributes: {
+            SellerBillingAgreementId: common.uuid(),
+            StoreName: amzLib.constants.STORE_NAME,
+            CustomInformation: amzLib.constants.SELLER_NOTE_SUBSCRIPTION,
+          },
+        },
+      });
+
+      expect(amazonConfirmBillingAgreementSpy).to.be.calledOnce;
+      expect(amazonConfirmBillingAgreementSpy).to.be.calledWith({
+        AmazonBillingAgreementId: billingAgreementId,
+      });
+
+      expect(amazongAuthorizeOnBillingAgreementSpy).to.be.calledOnce;
+      expect(amazongAuthorizeOnBillingAgreementSpy).to.be.calledWith({
+        AmazonBillingAgreementId: billingAgreementId,
+        AuthorizationReferenceId: common.uuid().substring(0, 32),
+        AuthorizationAmount: {
+          CurrencyCode: amzLib.constants.CURRENCY_CODE,
+          Amount: amount,
+        },
+        SellerAuthorizationNote: amzLib.constants.SELLER_NOTE_ATHORIZATION_SUBSCRIPTION,
+        TransactionTimeout: 0,
+        CaptureNow: true,
+        SellerNote: amzLib.constants.SELLER_NOTE_ATHORIZATION_SUBSCRIPTION,
+        SellerOrderAttributes: {
+          SellerOrderId: common.uuid(),
+          StoreName: amzLib.constants.STORE_NAME,
+        },
+      });
+
+      expect(createSubSpy).to.be.calledOnce;
+      expect(createSubSpy).to.be.calledWith({
+        user,
+        customerId: billingAgreementId,
+        paymentMethod: amzLib.constants.PAYMENT_METHOD,
+        sub,
+        headers,
+        groupId,
+      });
+    });
   });
 
   describe('cancelSubscription', () => {
diff --git a/test/api/v3/unit/libs/stripePayments.test.js b/test/api/v3/unit/libs/stripePayments.test.js
index 26ce880715..6d1cc31a86 100644
--- a/test/api/v3/unit/libs/stripePayments.test.js
+++ b/test/api/v3/unit/libs/stripePayments.test.js
@@ -395,6 +395,50 @@ describe('Stripe Payments', () => {
         subscriptionId,
       });
     });
+
+    it('subscribes a group with the correct number of group members', async () => {
+      token = 'test-token';
+      sub = data.sub;
+      groupId = group._id;
+      email = 'test@test.com';
+      headers = {};
+      user = new User();
+      user.guilds.push(groupId);
+      await user.save();
+      group.memberCount = 2;
+      await group.save();
+
+      await stripePayments.checkout({
+        token,
+        user,
+        gift,
+        sub,
+        groupId,
+        email,
+        headers,
+        coupon,
+      }, stripe);
+
+      expect(stripeCreateCustomerSpy).to.be.calledOnce;
+      expect(stripeCreateCustomerSpy).to.be.calledWith({
+        email,
+        metadata: { uuid: user._id },
+        card: token,
+        plan: sub.key,
+        quantity: 4,
+      });
+
+      expect(stripePaymentsCreateSubSpy).to.be.calledOnce;
+      expect(stripePaymentsCreateSubSpy).to.be.calledWith({
+        user,
+        customerId: customerIdResponse,
+        paymentMethod: 'Stripe',
+        sub,
+        headers,
+        groupId,
+        subscriptionId,
+      });
+    });
   });
 
   describe('edit subscription', () => {
diff --git a/website/server/libs/amazonPayments.js b/website/server/libs/amazonPayments.js
index 272b8e8445..8c5c88eca7 100644
--- a/website/server/libs/amazonPayments.js
+++ b/website/server/libs/amazonPayments.js
@@ -252,6 +252,17 @@ api.subscribe = async function subscribe (options) {
     if (!result) throw new NotAuthorized(i18n.t('invalidCoupon'));
   }
 
+  let amount = sub.price;
+  let leaderCount = 1;
+  let priceOfSingleMember = 3;
+
+  if (groupId) {
+    let groupFields = basicGroupFields.concat(' purchased');
+    let group = await Group.getGroup({user, groupId, populateLeader: false, groupFields});
+
+    amount = sub.price + (group.memberCount - leaderCount) * priceOfSingleMember;
+  }
+
   await this.setBillingAgreementDetails({
     AmazonBillingAgreementId: billingAgreementId,
     BillingAgreementAttributes: {
@@ -273,7 +284,7 @@ api.subscribe = async function subscribe (options) {
     AuthorizationReferenceId: common.uuid().substring(0, 32),
     AuthorizationAmount: {
       CurrencyCode: this.constants.CURRENCY_CODE,
-      Amount: sub.price,
+      Amount: amount,
     },
     SellerAuthorizationNote: this.constants.SELLER_NOTE_ATHORIZATION_SUBSCRIPTION,
     TransactionTimeout: 0,
diff --git a/website/server/libs/stripePayments.js b/website/server/libs/stripePayments.js
index 3da5d71703..4f8b96aa47 100644
--- a/website/server/libs/stripePayments.js
+++ b/website/server/libs/stripePayments.js
@@ -92,6 +92,9 @@ api.checkout = async function checkout (options, stripeInc) {
 
     if (groupId) {
       customerObject.quantity = sub.quantity;
+      let groupFields = basicGroupFields.concat(' purchased');
+      let group = await Group.getGroup({user, groupId, populateLeader: false, groupFields});
+      customerObject.quantity = group.memberCount + sub.quantity - 1;
     }
 
     response = await stripeApi.customers.create(customerObject);