diff --git a/.changeset/slimy-seas-join.md b/.changeset/slimy-seas-join.md
new file mode 100644
index 0000000000..0cc841f280
--- /dev/null
+++ b/.changeset/slimy-seas-join.md
@@ -0,0 +1,5 @@
+---
+"@medusajs/core-flows": patch
+---
+
+fix(core-flows): refresh payment collections upon shipping changes
diff --git a/integration-tests/http/__tests__/cart/store/cart.spec.ts b/integration-tests/http/__tests__/cart/store/cart.spec.ts
index 6f3a73444f..8cf153e2fc 100644
--- a/integration-tests/http/__tests__/cart/store/cart.spec.ts
+++ b/integration-tests/http/__tests__/cart/store/cart.spec.ts
@@ -302,7 +302,7 @@ medusaIntegrationTestRunner({
       })
 
       describe("POST /store/carts/:id/line-items", () => {
-        let shippingOption
+        let shippingOption, shippingOptionExpensive
 
         beforeEach(async () => {
           const stockLocation = (
@@ -358,25 +358,63 @@ medusaIntegrationTestRunner({
             adminHeaders
           )
 
+          const shippingOptionPayload = {
+            name: `Shipping`,
+            service_zone_id: fulfillmentSet.service_zones[0].id,
+            shipping_profile_id: shippingProfile.id,
+            provider_id: "manual_test-provider",
+            price_type: "flat",
+            type: {
+              label: "Test type",
+              description: "Test description",
+              code: "test-code",
+            },
+            prices: [
+              { currency_code: "usd", amount: 1000 },
+              {
+                currency_code: "usd",
+                amount: 0,
+                rules: [
+                  {
+                    attribute: "item_total",
+                    operator: "gt",
+                    value: 5000,
+                  },
+                ],
+              },
+            ],
+            rules: [
+              {
+                attribute: "enabled_in_store",
+                value: '"true"',
+                operator: "eq",
+              },
+              {
+                attribute: "is_return",
+                value: "false",
+                operator: "eq",
+              },
+            ],
+          }
+
           shippingOption = (
+            await api.post(
+              `/admin/shipping-options`,
+              shippingOptionPayload,
+              adminHeaders
+            )
+          ).data.shipping_option
+
+          shippingOptionExpensive = (
             await api.post(
               `/admin/shipping-options`,
               {
-                name: `Shipping`,
-                service_zone_id: fulfillmentSet.service_zones[0].id,
-                shipping_profile_id: shippingProfile.id,
-                provider_id: "manual_test-provider",
-                price_type: "flat",
-                type: {
-                  label: "Test type",
-                  description: "Test description",
-                  code: "test-code",
-                },
+                ...shippingOptionPayload,
                 prices: [
-                  { currency_code: "usd", amount: 1000 },
+                  { currency_code: "usd", amount: 10000 },
                   {
                     currency_code: "usd",
-                    amount: 0,
+                    amount: 5000,
                     rules: [
                       {
                         attribute: "item_total",
@@ -386,18 +424,6 @@ medusaIntegrationTestRunner({
                     ],
                   },
                 ],
-                rules: [
-                  {
-                    attribute: "enabled_in_store",
-                    value: '"true"',
-                    operator: "eq",
-                  },
-                  {
-                    attribute: "is_return",
-                    value: "false",
-                    operator: "eq",
-                  },
-                ],
               },
               adminHeaders
             )
@@ -555,6 +581,61 @@ medusaIntegrationTestRunner({
               })
             )
           })
+
+          it("should update payment collection upon changing shipping option", async () => {
+            await api.post(
+              `/store/carts/${cart.id}/shipping-methods`,
+              { option_id: shippingOption.id },
+              storeHeaders
+            )
+
+            await api.post(
+              `/store/payment-collections`,
+              { cart_id: cart.id },
+              storeHeaders
+            )
+
+            const cartAfterCollection = (
+              await api.get(`/store/carts/${cart.id}`, storeHeaders)
+            ).data.cart
+
+            expect(cartAfterCollection).toEqual(
+              expect.objectContaining({
+                id: cart.id,
+                shipping_methods: expect.arrayContaining([
+                  expect.objectContaining({
+                    shipping_option_id: shippingOption.id,
+                  }),
+                ]),
+                payment_collection: expect.objectContaining({
+                  amount: 2398,
+                }),
+              })
+            )
+
+            let cartAfterExpensiveShipping = (
+              await api.post(
+                `/store/carts/${cart.id}/shipping-methods`,
+                { option_id: shippingOptionExpensive.id },
+                storeHeaders
+              )
+            ).data.cart
+
+            expect(cartAfterExpensiveShipping).toEqual(
+              expect.objectContaining({
+                id: cartAfterExpensiveShipping.id,
+                shipping_methods: expect.arrayContaining([
+                  expect.objectContaining({
+                    shipping_option_id: shippingOptionExpensive.id,
+                    amount: 5000,
+                  }),
+                ]),
+                payment_collection: expect.objectContaining({
+                  amount: 6398,
+                }),
+              })
+            )
+          })
         })
 
         it("should add item to cart with tax lines multiple times", async () => {
diff --git a/packages/core/core-flows/src/cart/workflows/add-shipping-method-to-cart.ts b/packages/core/core-flows/src/cart/workflows/add-shipping-method-to-cart.ts
index 7c0f15282f..b5a5e842e6 100644
--- a/packages/core/core-flows/src/cart/workflows/add-shipping-method-to-cart.ts
+++ b/packages/core/core-flows/src/cart/workflows/add-shipping-method-to-cart.ts
@@ -17,8 +17,7 @@ import { validateAndReturnShippingMethodsDataStep } from "../steps/validate-ship
 import { validateCartShippingOptionsPriceStep } from "../steps/validate-shipping-options-price"
 import { cartFieldsForRefreshSteps } from "../utils/fields"
 import { listShippingOptionsForCartWithPricingWorkflow } from "./list-shipping-options-for-cart-with-pricing"
-import { updateCartPromotionsWorkflow } from "./update-cart-promotions"
-import { updateTaxLinesWorkflow } from "./update-tax-lines"
+import { refreshCartItemsWorkflow } from "./refresh-cart-items"
 
 export interface AddShippingMethodToCartWorkflowInput {
   cart_id: string
@@ -132,9 +131,9 @@ export const addShippingMethodToCartWorkflow = createWorkflow(
       }
     )
 
-    const currentShippingMethods = transform({ cart }, ({ cart }) => {
-      return cart.shipping_methods.map((sm) => sm.id)
-    })
+    const currentShippingMethods = transform({ cart }, ({ cart }) =>
+      cart.shipping_methods.map((sm) => sm.id)
+    )
 
     parallelize(
       removeShippingMethodFromCartStep({
@@ -149,16 +148,8 @@ export const addShippingMethodToCartWorkflow = createWorkflow(
       })
     )
 
-    updateTaxLinesWorkflow.runAsStep({
-      input: {
-        cart_id: input.cart_id,
-      },
-    })
-
-    updateCartPromotionsWorkflow.runAsStep({
-      input: {
-        cart_id: input.cart_id,
-      },
+    refreshCartItemsWorkflow.runAsStep({
+      input: { cart_id: cart.id },
     })
   }
 )
diff --git a/packages/medusa/src/api/store/carts/query-config.ts b/packages/medusa/src/api/store/carts/query-config.ts
index d236c198ec..d66d20e424 100644
--- a/packages/medusa/src/api/store/carts/query-config.ts
+++ b/packages/medusa/src/api/store/carts/query-config.ts
@@ -28,16 +28,15 @@ export const defaultStoreCartFields = [
   "original_shipping_subtotal",
   "original_shipping_total",
   "metadata",
+  "sales_channel_id",
   "promotions.id",
   "promotions.code",
   "promotions.is_automatic",
   "promotions.application_method.value",
   "promotions.application_method.type",
   "promotions.application_method.currency_code",
-  "items",
-  "items.thumbnail",
-  "region",
   "items.id",
+  "items.thumbnail",
   "items.product",
   "items.product.id",
   "items.variant",
@@ -118,10 +117,7 @@ export const defaultStoreCartFields = [
   "region.currency_code",
   "region.automatic_taxes",
   "*region.countries",
-  "sales_channel_id",
-
-  "payment_collection.id",
-  "payment_collection.amount",
+  "*payment_collection",
   "*payment_collection.payment_sessions",
 ]