diff --git a/.changeset/old-sites-clean.md b/.changeset/old-sites-clean.md
new file mode 100644
index 00000000..09af110a
--- /dev/null
+++ b/.changeset/old-sites-clean.md
@@ -0,0 +1,5 @@
+---
+"@labdigital/commercetools-mock": minor
+---
+
+Add removeQuantity action for inventory entries
diff --git a/src/repositories/inventory-entry/actions.ts b/src/repositories/inventory-entry/actions.ts
index b7f41cbd..4ef8e638 100644
--- a/src/repositories/inventory-entry/actions.ts
+++ b/src/repositories/inventory-entry/actions.ts
@@ -1,6 +1,7 @@
 import type {
 	InventoryEntry,
 	InventoryEntryChangeQuantityAction,
+	InventoryEntryRemoveQuantityAction,
 	InventoryEntrySetCustomFieldAction,
 	InventoryEntrySetCustomTypeAction,
 	InventoryEntrySetExpectedDeliveryAction,
@@ -26,6 +27,17 @@ export class InventoryEntryUpdateHandler
 		resource.availableQuantity = quantity;
 	}
 
+	removeQuantity(
+		context: RepositoryContext,
+		resource: Writable<InventoryEntry>,
+		{ quantity }: InventoryEntryRemoveQuantityAction,
+	) {
+		const newQuantity = Math.max(0, resource.quantityOnStock - quantity);
+		resource.quantityOnStock = newQuantity;
+		// don't know active reservations so just set to same value
+		resource.availableQuantity = newQuantity;
+	}
+
 	setCustomField(
 		context: RepositoryContext,
 		resource: InventoryEntry,
diff --git a/src/services/inventory-entry.test.ts b/src/services/inventory-entry.test.ts
index 58c88193..adf2bf38 100644
--- a/src/services/inventory-entry.test.ts
+++ b/src/services/inventory-entry.test.ts
@@ -93,6 +93,21 @@ describe("Inventory Entry Update Actions", () => {
 		expect(response.body.quantityOnStock).toBe(300);
 	});
 
+	test("removeQuantity", async () => {
+		assert(inventoryEntry, "inventory entry not created");
+
+		const response = await supertest(ctMock.app)
+			.post(`/dummy/inventory/${inventoryEntry.id}`)
+			.send({
+				version: 1,
+				actions: [{ action: "removeQuantity", quantity: 15 }],
+			});
+		expect(response.status).toBe(200);
+		expect(response.body.version).toBe(2);
+		expect(response.body.availableQuantity).toBe(85);
+		expect(response.body.quantityOnStock).toBe(85);
+	});
+
 	test("set custom type", async () => {
 		assert(inventoryEntry, "inventory entry not created");
 		assert(customType, "custom type not created");