diff --git a/test/api/v3/integration/groups/POST-groups_groupId_leave.js b/test/api/v3/integration/groups/POST-groups_groupId_leave.test.js
similarity index 86%
rename from test/api/v3/integration/groups/POST-groups_groupId_leave.js
rename to test/api/v3/integration/groups/POST-groups_groupId_leave.test.js
index c4764e3428..fea70d3176 100644
--- a/test/api/v3/integration/groups/POST-groups_groupId_leave.js
+++ b/test/api/v3/integration/groups/POST-groups_groupId_leave.test.js
@@ -2,6 +2,7 @@ import { v4 as generateUUID } from 'uuid';
 import {
   each,
 } from 'lodash';
+import moment from 'moment';
 import {
   generateChallenge,
   checkExistence,
@@ -12,6 +13,7 @@ import {
 } from '../../../../helpers/api-integration/v3';
 import { model as User } from '../../../../../website/server/models/user';
 import payments from '../../../../../website/server/libs/payments/payments';
+import { calculateSubscriptionTerminationDate } from '../../../../../website/server/libs/payments/util';
 
 describe('POST /groups/:groupId/leave', () => {
   const typesOfGroups = {
@@ -338,4 +340,48 @@ describe('POST /groups/:groupId/leave', () => {
       });
     });
   });
+
+  each(typesOfGroups, (groupDetails, groupType) => {
+    context(`Leaving a group with extraMonths left plan when the group is a ${groupType}`, () => {
+      const extraMonths = 12;
+      let groupWithPlan;
+      let member;
+
+      beforeEach(async () => {
+        const { group, members } = await createAndPopulateGroup({
+          groupDetails,
+          members: 1,
+          upgradeToGroupPlan: true,
+        });
+        [member] = members;
+        groupWithPlan = group;
+        await member.update({
+          'purchased.plan.extraMonths': extraMonths,
+        });
+      });
+      it('calculates dateTerminated and sets extraMonths to zero after user leaves the group', async () => {
+        const userBeforeLeave = await User.findById(member._id).exec();
+
+        await member.post(`/groups/${groupWithPlan._id}/leave`);
+        const userAfterLeave = await User.findById(member._id).exec();
+
+        const dateTerminatedBefore = userBeforeLeave.purchased.plan.dateTerminated;
+        const extraMonthsBefore = userBeforeLeave.purchased.plan.extraMonths;
+        const dateTerminatedAfter = userAfterLeave.purchased.plan.dateTerminated;
+        const extraMonthsAfter = userAfterLeave.purchased.plan.extraMonths;
+
+        const expectedTerminationDate = calculateSubscriptionTerminationDate(null, {
+          customerId: payments.constants.GROUP_PLAN_CUSTOMER_ID,
+          extraMonths,
+        }, payments.constants);
+
+        expect(extraMonthsBefore).to.gte(12);
+        expect(extraMonthsAfter).to.equal(0);
+        expect(dateTerminatedBefore).to.be.null;
+        expect(dateTerminatedAfter).to.exist;
+
+        expect(moment(dateTerminatedAfter).diff(expectedTerminationDate, 'days')).to.equal(0);
+      });
+    });
+  });
 });
diff --git a/test/helpers/api-integration/v3/object-generators.js b/test/helpers/api-integration/v3/object-generators.js
index e713c1084c..b48dd862a9 100644
--- a/test/helpers/api-integration/v3/object-generators.js
+++ b/test/helpers/api-integration/v3/object-generators.js
@@ -5,6 +5,8 @@ import { v4 as generateUUID } from 'uuid';
 import { ApiUser, ApiGroup, ApiChallenge } from '../api-classes';
 import { requester } from '../requester';
 import * as Tasks from '../../../../website/server/models/task';
+import payments from '../../../../website/server/libs/payments/payments';
+import { model as User } from '../../../../website/server/models/user';
 
 // Creates a new user and returns it
 // If you need the user to have specific requirements,
@@ -83,14 +85,35 @@ export async function generateGroup (leader, details = {}, update = {}) {
   return apiGroup;
 }
 
+async function _upgradeToGroupPlan (groupLeader, group) {
+  const groupLeaderModel = await User.findById(groupLeader._id).exec();
+
+  // Create subscription
+  const paymentData = {
+    user: groupLeaderModel,
+    groupId: group._id,
+    sub: {
+      key: 'basic_3mo',
+    },
+    customerId: 'customer-id',
+    paymentMethod: 'Payment Method',
+    headers: {
+      'x-client': 'habitica-web',
+      'user-agent': '',
+    },
+  };
+  await payments.createSubscription(paymentData);
+}
+
 // This is generate group + the ability to create
 // real users to populate it. The settings object
 // takes in:
 // members: Number - the number of group members to create.
 // Defaults to 0. Does not include group leader.
-// inivtes: Number - the number of users to create and invite to the group. Defaults to 0.
+// invites: Number - the number of users to create and invite to the group. Defaults to 0.
 // groupDetails: Object - how to initialize the group
 // leaderDetails: Object - defaults for the leader, defaults with a gem balance so the user
+// addGroupPlan: boolean - will add group plan with basic subscription. Defaults to false
 // can create the group
 //
 // Returns an object with
@@ -101,6 +124,7 @@ export async function generateGroup (leader, details = {}, update = {}) {
 export async function createAndPopulateGroup (settings = {}) {
   const numberOfMembers = settings.members || 0;
   const numberOfInvites = settings.invites || 0;
+  const upgradeToGroupPlan = settings.upgradeToGroupPlan || false;
   const { groupDetails } = settings;
   const leaderDetails = settings.leaderDetails || { balance: 10 };
 
@@ -130,6 +154,10 @@ export async function createAndPopulateGroup (settings = {}) {
 
   await Promise.all(invitees.map(invitee => invitee.sync()));
 
+  if (upgradeToGroupPlan) {
+    await _upgradeToGroupPlan(groupLeader, group);
+  }
+
   return {
     groupLeader,
     group,
diff --git a/website/server/controllers/api-v3/groups.js b/website/server/controllers/api-v3/groups.js
index b90b226659..a35a6b8616 100644
--- a/website/server/controllers/api-v3/groups.js
+++ b/website/server/controllers/api-v3/groups.js
@@ -861,11 +861,6 @@ api.leaveGroup = {
       if (guildIndex >= 0) user.guilds.splice(guildIndex, 1);
     }
 
-    const isMemberOfGroupPlan = await user.isMemberOfGroupPlan();
-    if (!isMemberOfGroupPlan) {
-      await payments.cancelGroupSubscriptionForUser(user, group);
-    }
-
     if (group.hasNotCancelled()) await group.updateGroupPlan(true);
     res.respond(200, {});
   },