diff --git a/.changeset/easy-paws-kick.md b/.changeset/easy-paws-kick.md
new file mode 100644
index 0000000000..c295af9204
--- /dev/null
+++ b/.changeset/easy-paws-kick.md
@@ -0,0 +1,5 @@
+---
+"@medusajs/types": patch
+---
+
+fix(types): add missing completed_at property for carts
diff --git a/packages/core/types/src/http/cart/common.ts b/packages/core/types/src/http/cart/common.ts
index 3e37a85288..109284c6a5 100644
--- a/packages/core/types/src/http/cart/common.ts
+++ b/packages/core/types/src/http/cart/common.ts
@@ -199,6 +199,11 @@ export interface BaseCart {
    * The sum of all shipping methods' original tax totals before discounts.
    */
   original_shipping_tax_total: number
+
+  /**
+   * The date the cart was completed.
+   */
+  completed_at?: string | Date
 }
 
 export interface BaseCartAddress {