diff --git a/__tests__/shared/components/challenge-detail/Header/index.jsx b/__tests__/shared/components/challenge-detail/Header/index.jsx
index 8ffdb6648..9a51b14d5 100644
--- a/__tests__/shared/components/challenge-detail/Header/index.jsx
+++ b/__tests__/shared/components/challenge-detail/Header/index.jsx
@@ -2,9 +2,14 @@ import React from 'react';
 import Renderer from 'react-test-renderer/shallow';
 
 import Header from 'components/challenge-detail/Header';
+import TabSelector from 'components/challenge-detail/Header/TabSelector';
+
+jest.mock('react-responsive', () => ({
+  useMediaQuery: () => true,
+}));
 
 function collectText(node) {
-  if (typeof node === 'string') {
+  if (typeof node === 'string' || typeof node === 'number') {
     return [node];
   }
 
@@ -125,3 +130,40 @@ describe('Challenge detail header actions', () => {
     expect(collectText(output)).toContain('Submit a solution');
   });
 });
+
+describe('Challenge detail tab counts', () => {
+  test('renders the MM submission total independently of loaded attempts', () => {
+    const renderer = new Renderer();
+    renderer.render(
+      <TabSelector
+        challenge={{
+          id: 'challenge-id',
+          legacy: {},
+          metadata: [],
+          tags: [],
+          type: 'Marathon Match',
+        }}
+        checkpointCount={0}
+        hasRegistered
+        isLoggedIn
+        isMM
+        mySubmissions={[{ submissionId: 'latest-submission' }]}
+        mySubmissionsCount={3}
+        numOfCheckpointSubmissions={0}
+        numOfRegistrants={4}
+        numOfSubmissions={4}
+        numWinners={0}
+        onSelectorClicked={jest.fn()}
+        onSort={jest.fn()}
+        selectedView="submissions"
+        trackLower="data science"
+        viewAsTable={false}
+      />,
+    );
+
+    const text = collectText(renderer.getRenderOutput());
+    const mySubmissionsLabelIndex = text.indexOf('My Submissions');
+
+    expect(text[mySubmissionsLabelIndex + 1]).toBe(3);
+  });
+});
diff --git a/__tests__/shared/containers/challenge-detail/index.jsx b/__tests__/shared/containers/challenge-detail/index.jsx
index 5fef65aa9..59b7497c4 100644
--- a/__tests__/shared/containers/challenge-detail/index.jsx
+++ b/__tests__/shared/containers/challenge-detail/index.jsx
@@ -4,6 +4,7 @@ import {
   isGroupedChallenge,
   isGroupedChallengeAccessError,
   isWiproRegistrationBlocked,
+  mapStateToProps,
   shouldLoginForGroupedChallenge,
   shouldLoginForGroupedChallengeError,
 } from 'containers/challenge-detail';
@@ -76,6 +77,64 @@ describe('Challenge detail winners filter', () => {
   });
 });
 
+describe('Challenge detail My Submissions count', () => {
+  test('uses the total attempt count when only the latest MM submission is loaded', () => {
+    const state = {
+      auth: {
+        user: {
+          handle: 'member',
+          userId: '123',
+        },
+      },
+      challenge: {
+        checkpoints: {},
+        details: {
+          id: 'challenge-id',
+          registrants: [{ memberHandle: 'member', memberId: '123' }],
+          submissions: [],
+        },
+        mmSubmissions: {
+          challengeId: 'challenge-id',
+          data: [{
+            member: 'member',
+            memberId: '123',
+            submissionCount: 3,
+            submissions: [{ submissionId: 'latest-submission' }],
+          }],
+        },
+        reviewSummations: [],
+        statisticsData: [],
+      },
+      challengeListing: {},
+      domain: {},
+      lookup: {
+        allCountries: [],
+        reviewTypes: [],
+      },
+      page: {
+        challengeDetails: {
+          feedbackOpen: {},
+        },
+      },
+      tcCommunities: {
+        list: {},
+      },
+      terms: {},
+      topcoderHeader: {},
+    };
+
+    const props = mapStateToProps(state, {
+      challengesUrl: '/challenges',
+      match: {
+        params: { challengeId: 'challenge-id' },
+      },
+    });
+
+    expect(props.mySubmissions).toHaveLength(1);
+    expect(props.mySubmissionsCount).toBe(3);
+  });
+});
+
 describe('Challenge detail grouped challenge login guard', () => {
   beforeEach(() => {
     document.cookie = 'tc_utm=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/';
diff --git a/src/shared/components/challenge-detail/Header/TabSelector/index.jsx b/src/shared/components/challenge-detail/Header/TabSelector/index.jsx
index a02f2177b..6916a4ac9 100644
--- a/src/shared/components/challenge-detail/Header/TabSelector/index.jsx
+++ b/src/shared/components/challenge-detail/Header/TabSelector/index.jsx
@@ -39,6 +39,7 @@ export default function ChallengeViewSelector(props) {
     trackLower,
     hasRegistered,
     mySubmissions,
+    mySubmissionsCount,
     onSort,
     viewAsTable,
   } = props;
@@ -133,6 +134,9 @@ export default function ChallengeViewSelector(props) {
   }
 
   const numOfSub = numOfSubmissions + (numOfCheckpointSubmissions || 0);
+  const mySubmissionsBadgeCount = _.isFinite(mySubmissionsCount)
+    ? mySubmissionsCount
+    : mySubmissions.length;
   const forumId = _.get(challenge, 'legacy.forumId') || 0;
   const discuss = _.get(challenge, 'discussions', []).filter(d => (
     _.toLower(d.type) === 'challenge' && !_.isEmpty(d.url)
@@ -247,7 +251,7 @@ export default function ChallengeViewSelector(props) {
             styleName={getSelectorStyle(selectedView, DETAIL_TABS.MY_SUBMISSIONS)}
           >
             My Submissions
-            <span styleName="num">{mySubmissions.length}</span>
+            <span styleName="num">{mySubmissionsBadgeCount}</span>
           </a>
         ) : null
       }
@@ -358,7 +362,7 @@ export default function ChallengeViewSelector(props) {
                   {
                     currentSelected === DETAIL_TABS.MY_SUBMISSIONS && hasRegistered
                     && isMM && mySubmissions && (
-                      <span styleName="mobile-tab-num">{mySubmissions.length}</span>
+                      <span styleName="mobile-tab-num">{mySubmissionsBadgeCount}</span>
                     )
                   }
                   {
@@ -447,6 +451,7 @@ ChallengeViewSelector.defaultProps = {
   numOfRegistrants: 0,
   numOfCheckpointSubmissions: 0,
   numOfSubmissions: 0,
+  mySubmissionsCount: null,
 };
 
 ChallengeViewSelector.propTypes = {
@@ -477,6 +482,7 @@ ChallengeViewSelector.propTypes = {
   trackLower: PT.string.isRequired,
   hasRegistered: PT.bool.isRequired,
   mySubmissions: PT.arrayOf(PT.shape()).isRequired,
+  mySubmissionsCount: PT.number,
   onSort: PT.func.isRequired,
   viewAsTable: PT.bool.isRequired,
 };
diff --git a/src/shared/components/challenge-detail/Header/index.jsx b/src/shared/components/challenge-detail/Header/index.jsx
index 77c945f40..345ed44c1 100644
--- a/src/shared/components/challenge-detail/Header/index.jsx
+++ b/src/shared/components/challenge-detail/Header/index.jsx
@@ -63,6 +63,7 @@ export default function ChallengeHeader(props) {
     isMenuOpened,
     submissionEnded,
     mySubmissions,
+    mySubmissionsCount,
     openForRegistrationChallenges,
     onSort,
     viewAsTable,
@@ -571,6 +572,7 @@ export default function ChallengeHeader(props) {
           hasRegistered={hasRegistered}
           checkpointCount={checkpointCount}
           mySubmissions={mySubmissions}
+          mySubmissionsCount={mySubmissionsCount}
           onSort={onSort}
           viewAsTable={viewAsTable}
         />
@@ -585,6 +587,7 @@ ChallengeHeader.defaultProps = {
   isMenuOpened: false,
   hasThriveArticles: false,
   hasRecommendedChallenges: false,
+  mySubmissionsCount: null,
 };
 
 ChallengeHeader.propTypes = {
@@ -639,6 +642,7 @@ ChallengeHeader.propTypes = {
   hasFirstPlacement: PT.bool.isRequired,
   isMenuOpened: PT.bool,
   mySubmissions: PT.arrayOf(PT.shape()).isRequired,
+  mySubmissionsCount: PT.number,
   openForRegistrationChallenges: PT.shape().isRequired,
   onSort: PT.func.isRequired,
   viewAsTable: PT.bool.isRequired,
diff --git a/src/shared/containers/challenge-detail/index.jsx b/src/shared/containers/challenge-detail/index.jsx
index dce96908b..8cc7594ed 100644
--- a/src/shared/containers/challenge-detail/index.jsx
+++ b/src/shared/containers/challenge-detail/index.jsx
@@ -564,6 +564,7 @@ class ChallengeDetailPageContainer extends React.Component {
       // expandedTags,
       // expandTag,
       mySubmissions,
+      mySubmissionsCount,
       reviewTypes,
       openForRegistrationChallenges,
       statisticsData,
@@ -710,6 +711,7 @@ class ChallengeDetailPageContainer extends React.Component {
                 isMenuOpened={isMenuOpened}
                 submissionEnded={submissionEnded}
                 mySubmissions={challenge.isRegistered ? mySubmissions : []}
+                mySubmissionsCount={challenge.isRegistered ? mySubmissionsCount : 0}
                 openForRegistrationChallenges={openForRegistrationChallenges}
                 viewAsTable={viewAsTable && isMM}
                 onSort={(currenctSelected, sort) => {
@@ -941,6 +943,7 @@ ChallengeDetailPageContainer.defaultProps = {
   loadingMMSubmissionsForChallengeId: null,
   mmSubmissions: [],
   mySubmissions: [],
+  mySubmissionsCount: 0,
   isLoadingSubmissionInformation: false,
   submissionInformation: null,
   // prizeMode: 'money-usd',
@@ -993,6 +996,7 @@ ChallengeDetailPageContainer.propTypes = {
   reviewTypes: PT.arrayOf(PT.shape()),
   reviewSummations: PT.arrayOf(PT.shape()).isRequired,
   mySubmissions: PT.arrayOf(PT.shape()),
+  mySubmissionsCount: PT.number,
   toggleCheckpointFeedback: PT.func.isRequired,
   unregisterFromChallenge: PT.func.isRequired,
   unregistering: PT.bool.isRequired,
@@ -1269,6 +1273,7 @@ export function mapStateToProps(state, props) {
     ? buildReviewSummationLookup(reviewSummations)
     : null;
   let mySubmissions = [];
+  let mySubmissionsCount = 0;
   if (challenge.registrants) {
     challenge.registrants = challenge.registrants.map(registrant => ({
       ...registrant,
@@ -1516,6 +1521,12 @@ export function mapStateToProps(state, props) {
             ...attempt,
             id: normalizedAttempts.length - index,
           }));
+          const submissionCount = _.isNil(submission.submissionCount)
+            ? null
+            : Number(submission.submissionCount);
+          mySubmissionsCount = Number.isFinite(submissionCount)
+            ? submissionCount
+            : mySubmissions.length;
         }
 
         return ({
@@ -1528,6 +1539,7 @@ export function mapStateToProps(state, props) {
       });
     } else if (loggedInUserId) {
       mySubmissions = _.filter(challenge.submissions, s => (`${s.memberId}` === `${loggedInUserId}`));
+      mySubmissionsCount = mySubmissions.length;
     }
   }
   const { page: { challengeDetails: { feedbackOpen } } } = state;
@@ -1582,6 +1594,7 @@ export function mapStateToProps(state, props) {
     reviewSummations,
     allCountries: state.lookup.allCountries,
     mySubmissions,
+    mySubmissionsCount,
     reviewTypes,
     openForRegistrationChallenges: state.challengeListing.openForRegistrationChallenges,
     statisticsData,