diff --git a/.changeset/large-loops-yell.md b/.changeset/large-loops-yell.md
new file mode 100644
index 0000000000000..2b81e428bd614
--- /dev/null
+++ b/.changeset/large-loops-yell.md
@@ -0,0 +1,5 @@
+---
+"@medusajs/core-flows": patch
+---
+
+fix(core-flows): refresh payment collection inside updateCartPromotionsWorkflow
diff --git a/integration-tests/http/__tests__/cart/store/cart.spec.ts b/integration-tests/http/__tests__/cart/store/cart.spec.ts
index 862d40c6c67c3..6e7a072902781 100644
--- a/integration-tests/http/__tests__/cart/store/cart.spec.ts
+++ b/integration-tests/http/__tests__/cart/store/cart.spec.ts
@@ -5299,6 +5299,75 @@ medusaIntegrationTestRunner({
         })
       })
 
+      describe("DELETE /store/carts/:id/promotions", () => {
+        it("should remove promotions and recalculate payment_collection amount", async () => {
+          cart = (
+            await api.post(
+              `/store/carts`,
+              {
+                currency_code: "usd",
+                sales_channel_id: salesChannel.id,
+                region_id: region.id,
+                shipping_address: shippingAddressData,
+                items: [{ variant_id: product.variants[0].id, quantity: 1 }],
+                promo_codes: [promotion.code],
+              },
+              storeHeaders
+            )
+          ).data.cart
+
+          await api.post(
+            `/store/payment-collections`,
+            { cart_id: cart.id },
+            storeHeaders
+          )
+
+          cart = (
+            await api.get(`/store/carts/${cart.id}`, storeHeaders)
+          ).data.cart
+
+          expect(cart).toEqual(
+            expect.objectContaining({
+              id: cart.id,
+              items: expect.arrayContaining([
+                expect.objectContaining({
+                  adjustments: expect.arrayContaining([
+                    expect.objectContaining({
+                      code: "PROMOTION_APPLIED",
+                      promotion_id: promotion.id,
+                      amount: 100,
+                    }),
+                  ]),
+                }),
+              ]),
+            })
+          )
+
+          const paymentCollectionAmount = cart.payment_collection.amount
+          const discountTotal = cart.discount_total
+
+          const cartAfterDeletion = (await api.delete(
+            `/store/carts/${cart.id}/promotions`,
+            { promo_codes: [promotion.code] },
+            storeHeaders
+          )).data.cart
+
+          expect(cartAfterDeletion).toEqual(
+            expect.objectContaining({
+              id: cart.id,
+              items: expect.arrayContaining([
+                expect.objectContaining({
+                  adjustments: []
+                }),
+              ]),
+            })
+          )
+
+          expect(cartAfterDeletion.payment_collection.amount).toEqual(paymentCollectionAmount - discountTotal)
+          expect(cartAfterDeletion.discount_total).toEqual(0)
+        })
+      })
+
       describe("POST /store/carts/:id/customer", () => {
         beforeEach(async () => {
           cart = (
diff --git a/packages/core/core-flows/src/cart/workflows/update-cart-promotions.ts b/packages/core/core-flows/src/cart/workflows/update-cart-promotions.ts
index b16bb996499fb..3f9beb39973eb 100644
--- a/packages/core/core-flows/src/cart/workflows/update-cart-promotions.ts
+++ b/packages/core/core-flows/src/cart/workflows/update-cart-promotions.ts
@@ -22,6 +22,7 @@ import {
 } from "../steps"
 import { updateCartPromotionsStep } from "../steps/update-cart-promotions"
 import { cartFieldsForRefreshSteps } from "../utils/fields"
+import { refreshPaymentCollectionForCartWorkflow } from "./refresh-payment-collection"
 
 /**
  * The details of the promotion updates on a cart.
@@ -153,6 +154,10 @@ export const updateCartPromotionsWorkflow = createWorkflow(
       })
     )
 
+    refreshPaymentCollectionForCartWorkflow.runAsStep({
+        input: { cart },
+    })
+
     releaseLockStep({
       key: cart.id,
     })