diff --git a/src/courseware/data/__factories__/courseMetadata.factory.js b/src/courseware/data/__factories__/courseMetadata.factory.js
index a8ca74a1..3f77e82f 100644
--- a/src/courseware/data/__factories__/courseMetadata.factory.js
+++ b/src/courseware/data/__factories__/courseMetadata.factory.js
@@ -63,4 +63,5 @@ Factory.define('courseMetadata')
     related_programs: null,
     user_needs_integrity_signature: false,
     recommendations: null,
+    username: 'testuser',
   });
diff --git a/src/courseware/data/api.js b/src/courseware/data/api.js
index 941426ef..e05b07ac 100644
--- a/src/courseware/data/api.js
+++ b/src/courseware/data/api.js
@@ -221,6 +221,7 @@ function normalizeMetadata(metadata) {
     relatedPrograms: camelCaseObject(data.related_programs),
     userNeedsIntegritySignature: data.user_needs_integrity_signature,
     isMasquerading: data.original_user_is_staff && !data.is_staff,
+    username: data.username,
   };
 }
 
diff --git a/src/generic/upgrade-button/UpgradeNowButton.jsx b/src/generic/upgrade-button/UpgradeNowButton.jsx
index c262fd4d..127e4370 100644
--- a/src/generic/upgrade-button/UpgradeNowButton.jsx
+++ b/src/generic/upgrade-button/UpgradeNowButton.jsx
@@ -15,7 +15,7 @@ function UpgradeNowButton(props) {
     ...rest
   } = props;
 
-  // Prefer offer's url in case it is ever different (though it is not at time of this writing)
+  // Prefer offer's url in case it is different (might hold a coupon code that the normal does not)
   const url = offer ? offer.upgradeUrl : verifiedMode.upgradeUrl;
 
   return (
diff --git a/src/setupTest.js b/src/setupTest.js
index 2fb761b6..2afe10c9 100755
--- a/src/setupTest.js
+++ b/src/setupTest.js
@@ -123,7 +123,7 @@ export function loadUnit(message = messageEvent) {
 export function logUnhandledRequests(axiosMock) {
   axiosMock.onAny().reply((config) => {
     // eslint-disable-next-line no-console
-    console.log(config.method, config.url.href);
+    console.log(config.method, config.url);
     return [200, {}];
   });
 }
diff --git a/src/shared/data/__factories__/courseMetadataBase.factory.js b/src/shared/data/__factories__/courseMetadataBase.factory.js
index 9c822cfb..9afe8686 100644
--- a/src/shared/data/__factories__/courseMetadataBase.factory.js
+++ b/src/shared/data/__factories__/courseMetadataBase.factory.js
@@ -12,10 +12,10 @@ export default new Factory()
     original_user_is_staff: false,
     number: 'DemoX',
     org: 'edX',
-    verifiedMode: {
-      upgradeUrl: 'test',
+    verified_mode: {
+      upgrade_url: 'test',
       price: 10,
-      currencySymbol: '$',
+      currency_symbol: '$',
     },
   })
   .attr(
diff --git a/src/shared/streak-celebration/StreakCelebrationModal.jsx b/src/shared/streak-celebration/StreakCelebrationModal.jsx
index f8fac945..ec203bc1 100644
--- a/src/shared/streak-celebration/StreakCelebrationModal.jsx
+++ b/src/shared/streak-celebration/StreakCelebrationModal.jsx
@@ -1,11 +1,14 @@
 import React, { useEffect, useState } from 'react';
 import PropTypes from 'prop-types';
+import { camelCaseObject, getConfig } from '@edx/frontend-platform';
+import { sendTrackEvent } from '@edx/frontend-platform/analytics';
+import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 import {
   FormattedMessage, injectIntl, intlShape,
 } from '@edx/frontend-platform/i18n';
 import { Lightbulb, MoneyFilled } from '@edx/paragon/icons';
 import {
-  Alert, Icon, ModalDialog,
+  Alert, Icon, ModalDialog, Spinner,
 } from '@edx/paragon';
 import { layoutGenerator } from 'react-break';
 import { useDispatch } from 'react-redux';
@@ -41,18 +44,31 @@ function getRandomFactoid(intl, streakLength) {
   return factoids[Math.floor(Math.random() * (factoids.length))];
 }
 
+async function calculateVoucherDiscount(voucher, sku, username) {
+  const urlBase = `${getConfig().ECOMMERCE_BASE_URL}/api/v2/baskets/calculate`;
+  const url = `${urlBase}/?code=${voucher}&sku=${sku}&username=${username}`;
+  return getAuthenticatedHttpClient().get(url)
+    .then(res => camelCaseObject(res));
+}
+
 function StreakModal({
   courseId, metadataModel, streakLengthToCelebrate, intl, isStreakCelebrationOpen,
-  closeStreakCelebration, StreakDiscountCouponEnabled, verifiedMode, ...rest
+  closeStreakCelebration, streakDiscountCouponEnabled, verifiedMode, ...rest
 }) {
   if (!isStreakCelebrationOpen) {
     return null;
   }
-  const { org, celebrations } = useModel(metadataModel, courseId);
+  const { org, celebrations, username } = useModel(metadataModel, courseId);
   const factoid = getRandomFactoid(intl, streakLengthToCelebrate);
   // eslint-disable-next-line no-unused-vars
   const [randomFactoid, setRandomFactoid] = useState(factoid); // Don't change factoid on re-render
 
+  // Open edX Folks: if you create a voucher with this code, the MFE will notice and show the discount
+  const discountCode = 'ZGY11119949';
+  // Negative means "we don't know yet" vs zero meaning no discount available
+  const [discountPercent, setDiscountPercent] = useState(-1);
+  const queryingDiscount = discountPercent < 0;
+
   const layout = layoutGenerator({
     mobile: 0,
     desktop: 575,
@@ -68,6 +84,37 @@ function StreakModal({
     }
   }, [isStreakCelebrationOpen, org, courseId]);
 
+  // Ask ecommerce to calculate discount savings
+  useEffect(() => {
+    if (streakDiscountCouponEnabled && verifiedMode && getConfig().ECOMMERCE_BASE_URL) {
+      calculateVoucherDiscount(discountCode, verifiedMode.sku, username)
+        .then(
+          (result) => {
+            const { totalInclTax, totalInclTaxExclDiscounts } = result.data;
+            if (totalInclTaxExclDiscounts && totalInclTax !== totalInclTaxExclDiscounts) {
+              // Just store the percent (rather than using these values directly), because ecommerce doesn't give us
+              // the currency symbol to use, so we want to use the symbol that LMS gives us. And I don't want to assume
+              // ecommerce's currency is the same as the LMS. So we'll keep using the values in verifiedMode, just
+              // multiplied by the calculated percentage.
+              setDiscountPercent(1 - totalInclTax / totalInclTaxExclDiscounts);
+              sendTrackEvent('edx.bi.course.streak_discount_enabled', {
+                course_id: courseId,
+                sku: verifiedMode.sku,
+              });
+            } else {
+              setDiscountPercent(0);
+            }
+          },
+          () => {
+            // ignore any errors - we just won't show the discount to the user then
+            setDiscountPercent(0);
+          },
+        );
+    } else {
+      setDiscountPercent(0);
+    }
+  }, [streakDiscountCouponEnabled, username, verifiedMode]);
+
   function CloseText() {
     return (
       <span>
@@ -82,21 +129,25 @@ function StreakModal({
   let offer;
 
   if (verifiedMode) {
-    upgradeUrl = `${verifiedMode.upgradeUrl}&code=ZGY11119949`;
+    upgradeUrl = `${verifiedMode.upgradeUrl}`;
     mode = {
       currencySymbol: verifiedMode.currencySymbol,
       price: verifiedMode.price,
       upgradeUrl,
     };
 
-    offer = {
-      discountedPrice: `${verifiedMode.currencySymbol}${(mode.price * 0.85).toFixed(2).toString()}`,
-      originalPrice: `${verifiedMode.currencySymbol}${mode.price.toString()}`,
-      upgradeUrl: mode.upgradeUrl,
-    };
+    if (discountPercent > 0) {
+      const discountMultipler = 1 - discountPercent;
+      offer = {
+        discountedPrice: `${verifiedMode.currencySymbol}${(mode.price * discountMultipler).toFixed(2).toString()}`,
+        originalPrice: `${verifiedMode.currencySymbol}${mode.price.toString()}`,
+        upgradeUrl: `${mode.upgradeUrl}&code=${discountCode}`,
+      };
+    }
   }
 
   const title = `${streakLengthToCelebrate} ${intl.formatMessage(messages.streakHeader)}`;
+  const showOffer = offer && streakDiscountCouponEnabled;
 
   return (
     <ModalDialog
@@ -125,7 +176,10 @@ function StreakModal({
             <img src={StreakDesktopImage} alt="" className="img-fluid" />
           </OnDesktop>
         </p>
-        { !StreakDiscountCouponEnabled && (
+        { queryingDiscount && (
+          <Spinner animation="border" variant="primary" role="status" />
+        )}
+        { !queryingDiscount && !showOffer && (
           <div className="d-flex py-3 bg-light-300">
             <Icon className="col-small ml-3" src={Lightbulb} />
             <div className="col-11 factoid-wrapper">
@@ -133,13 +187,15 @@ function StreakModal({
             </div>
           </div>
         )}
-        { StreakDiscountCouponEnabled && (
+        { !queryingDiscount && showOffer && (
           <Alert variant="success" className="px-0">
             <div className="d-flex">
               <Icon className="col-small ml-3 text-success-500" src={MoneyFilled} />
               <div className="col-11 factoid-wrapper">
                 <b>{intl.formatMessage(messages.congratulations)}</b>
-                &nbsp;{intl.formatMessage(messages.streakDiscountMessage)}&nbsp;
+                &nbsp;{intl.formatMessage(messages.streakDiscountMessage, {
+                  percent: (discountPercent * 100).toFixed(0),
+                })}&nbsp;
                 <FormattedMessage
                   id="learning.streakCelebration.streakCelebrationCouponEndDateMessage"
                   defaultMessage="Ends {date}."
@@ -153,7 +209,7 @@ function StreakModal({
         )}
       </ModalDialog.Body>
       <ModalDialog.Footer className="modal-footer d-block">
-        { StreakDiscountCouponEnabled && (
+        { !queryingDiscount && showOffer && (
           <>
             <OnMobile>
               <UpgradeNowButton
@@ -180,7 +236,7 @@ function StreakModal({
             </OnDesktop>
           </>
         )}
-        { !StreakDiscountCouponEnabled && (
+        { !queryingDiscount && !showOffer && (
           <ModalDialog.CloseButton className="px-5" variant="primary"><CloseText /></ModalDialog.CloseButton>
         )}
       </ModalDialog.Footer>
@@ -190,9 +246,9 @@ function StreakModal({
 
 StreakModal.defaultProps = {
   isStreakCelebrationOpen: false,
+  streakDiscountCouponEnabled: false,
   streakLengthToCelebrate: -1,
   verifiedMode: {},
-  StreakDiscountCouponEnabled: false,
 };
 
 StreakModal.propTypes = {
@@ -202,10 +258,11 @@ StreakModal.propTypes = {
   intl: intlShape.isRequired,
   isStreakCelebrationOpen: PropTypes.bool,
   closeStreakCelebration: PropTypes.func.isRequired,
-  StreakDiscountCouponEnabled: PropTypes.bool,
+  streakDiscountCouponEnabled: PropTypes.bool,
   verifiedMode: PropTypes.shape({
     currencySymbol: PropTypes.string,
     price: PropTypes.number,
+    sku: PropTypes.string,
     upgradeUrl: PropTypes.string,
   }),
 };
diff --git a/src/shared/streak-celebration/StreakCelebrationModal.test.jsx b/src/shared/streak-celebration/StreakCelebrationModal.test.jsx
index a89b0b1b..bfabfa18 100644
--- a/src/shared/streak-celebration/StreakCelebrationModal.test.jsx
+++ b/src/shared/streak-celebration/StreakCelebrationModal.test.jsx
@@ -1,26 +1,62 @@
 import React from 'react';
 import { Factory } from 'rosie';
+import { camelCaseObject, getConfig } from '@edx/frontend-platform';
 import { sendTrackEvent } from '@edx/frontend-platform/analytics';
-import { initializeTestStore, render, screen } from '../../setupTest';
+import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
+import MockAdapter from 'axios-mock-adapter';
+
+import {
+  act,
+  initializeMockApp,
+  initializeTestStore,
+  render,
+  screen,
+} from '../../setupTest';
 import StreakModal from './StreakCelebrationModal';
 
+initializeMockApp();
 jest.mock('@edx/frontend-platform/analytics');
 
 describe('Loaded Tab Page', () => {
-  const mockData = { metadataModel: 'coursewareMeta' };
+  let mockData;
+  let testStore;
+  let axiosMock;
+  const calculateUrl = `${getConfig().ECOMMERCE_BASE_URL}/api/v2/baskets/calculate/?code=ZGY11119949&sku=8CF08E5&username=testuser`;
+  const courseMetadata = Factory.build('courseMetadata', { celebrations: { streak_length_to_celebrate: 3 } });
+
+  function setDiscount(percent) {
+    mockData.streakDiscountCouponEnabled = true;
+    axiosMock.onGet(calculateUrl).reply(200, {
+      total_incl_tax: 100 - percent,
+      total_incl_tax_excl_discounts: 100,
+    });
+  }
+
+  function setDiscountError() {
+    mockData.streakDiscountCouponEnabled = true;
+    axiosMock.onGet(calculateUrl).reply(500);
+  }
+
+  async function renderModal() {
+    await act(async () => render(<StreakModal {...mockData} />, { store: testStore }));
+  }
 
   beforeAll(async () => {
-    mockData.isStreakCelebrationOpen = true;
-    mockData.streakLengthToCelebrate = 3;
+    mockData = { // props for StreakModal
+      closeStreakCelebration: jest.fn(),
+      courseId: courseMetadata.id,
+      isStreakCelebrationOpen: true,
+      metadataModel: 'coursewareMeta',
+      streakLengthToCelebrate: 3,
+      verifiedMode: camelCaseObject(courseMetadata.verified_mode),
+    };
+
+    testStore = await initializeTestStore({ courseMetadata }, false);
+    axiosMock = new MockAdapter(getAuthenticatedHttpClient());
   });
 
   it('shows streak celebration modal', async () => {
-    const courseMetadata = Factory.build('courseMetadata', { celebrations: { streakLengthToCelebrate: 3 } });
-    mockData.courseId = courseMetadata.id;
-    mockData.verifiedMode = courseMetadata.verifiedMode;
-    mockData.closeStreakCelebration = jest.fn();
-    const testStore = await initializeTestStore({ courseMetadata }, false);
-    render(<StreakModal {...mockData} courseId={courseMetadata.id} />, { store: testStore });
+    await renderModal();
 
     expect(screen.getByText('3 day streak')).toBeInTheDocument();
     expect(screen.getByText('Keep it up, you’re on a roll!')).toBeInTheDocument();
@@ -32,7 +68,23 @@ describe('Loaded Tab Page', () => {
     });
   });
 
-  it('shows streak celebration discount modal', async () => {
+  it('shows normal streak celebration modal when discount call fails', async () => {
+    setDiscountError();
+    await renderModal();
+
+    // This text is only for the non-discount case
+    expect(screen.getByText('Keep it up')).toBeInTheDocument();
+  });
+
+  it('shows normal streak celebration modal when discount is zero', async () => {
+    setDiscount(0);
+    await renderModal();
+
+    // This text is only for the non-discount case
+    expect(screen.getByText('Keep it up')).toBeInTheDocument();
+  });
+
+  it('shows discount version of streak celebration modal when available', async () => {
     Object.defineProperty(window, 'matchMedia', {
       writable: true,
       value: jest.fn().mockImplementation(query => {
@@ -49,15 +101,17 @@ describe('Loaded Tab Page', () => {
         };
       }),
     });
-    const courseMetadata = Factory.build('courseMetadata', { celebrations: { shouldCelebrateStreak: 3 } });
-    mockData.courseId = courseMetadata.id;
-    mockData.verifiedMode = courseMetadata.verifiedMode;
-    mockData.StreakDiscountCouponEnabled = true;
-    const testStore = await initializeTestStore({ courseMetadata }, false);
-    render(<StreakModal {...mockData} courseId={courseMetadata.id} />, { store: testStore });
+    setDiscount(14);
+    await renderModal();
+
     const endDateText = `Ends ${new Date(Date.now() + 14 * 24 * 60 * 60 * 1000).toLocaleDateString({ timeZone: 'UTC' })}.`;
-    expect(screen.getByText('You’ve unlocked a 15% off discount when you upgrade this course for a limited time only.')).toBeInTheDocument();
+    expect(screen.getByText('You’ve unlocked a 14% off discount when you upgrade this course for a limited time only.')).toBeInTheDocument();
     expect(screen.getByText(endDateText)).toBeInTheDocument();
     expect(screen.getByText('Continue with course')).toBeInTheDocument();
+    expect(screen.queryByText('Keep it up')).not.toBeInTheDocument();
+    expect(sendTrackEvent).toHaveBeenCalledWith('edx.bi.course.streak_discount_enabled', {
+      course_id: mockData.courseId,
+      sku: mockData.verifiedMode.sku,
+    });
   });
 });
diff --git a/src/shared/streak-celebration/messages.js b/src/shared/streak-celebration/messages.js
index dcff6e9f..e137bb2f 100644
--- a/src/shared/streak-celebration/messages.js
+++ b/src/shared/streak-celebration/messages.js
@@ -39,7 +39,7 @@ const messages = defineMessages({
   },
   streakDiscountMessage: {
     id: 'learning.streakCelebration.streakDiscountMessage',
-    defaultMessage: 'You’ve unlocked a 15% off discount when you upgrade this course for a limited time only.',
+    defaultMessage: 'You’ve unlocked a {percent}% off discount when you upgrade this course for a limited time only.',
     description: 'This message describes a discount the user becomes eligible for when they hit their three day streak',
   },
 });
diff --git a/src/tab-page/LoadedTabPage.jsx b/src/tab-page/LoadedTabPage.jsx
index d3df7d20..22a8563f 100644
--- a/src/tab-page/LoadedTabPage.jsx
+++ b/src/tab-page/LoadedTabPage.jsx
@@ -37,7 +37,7 @@ function LoadedTabPage({
   const activeTab = tabs.filter(tab => tab.slug === activeTabSlug)[0];
 
   const streakLengthToCelebrate = celebrations && celebrations.streakLengthToCelebrate;
-  const StreakDiscountCouponEnabled = celebrations && celebrations.streakDiscountEnabled && verifiedMode;
+  const streakDiscountCouponEnabled = celebrations && celebrations.streakDiscountEnabled && verifiedMode;
   const [isStreakCelebrationOpen,, closeStreakCelebration] = useToggle(streakLengthToCelebrate);
 
   return (
@@ -59,7 +59,7 @@ function LoadedTabPage({
         streakLengthToCelebrate={streakLengthToCelebrate}
         isStreakCelebrationOpen={!!isStreakCelebrationOpen}
         closeStreakCelebration={closeStreakCelebration}
-        StreakDiscountCouponEnabled={StreakDiscountCouponEnabled}
+        streakDiscountCouponEnabled={streakDiscountCouponEnabled}
         verifiedMode={verifiedMode}
       />
       <main id="main-content" className="d-flex flex-column flex-grow-1">