diff --git a/packages/graphql/api/orders.test.js b/packages/graphql/api/orders.test.js
index 9ae1511..c08ea58 100644
--- a/packages/graphql/api/orders.test.js
+++ b/packages/graphql/api/orders.test.js
@@ -1282,6 +1282,7 @@ describe('OrdersService', () => {
               order: {
                 ...mockOrder,
                 client: mockCustomer,
+                datetime_start: now.subtract(1, 'hour').toISOString(), // заказ в прошлом
                 slot: { ...mockSlot, master: mockMaster },
               },
             },
@@ -1345,6 +1346,7 @@ describe('OrdersService', () => {
               order: {
                 ...mockOrder,
                 client: mockCustomer,
+                datetime_start: now.subtract(1, 'hour').toISOString(), // заказ в прошлом
                 slot: { ...mockSlot, master: mockMaster },
               },
             },
@@ -1395,14 +1397,14 @@ describe('OrdersService', () => {
     });
 
     it('should throw error when trying to complete order before start time', async () => {
-      const pastOrder = {
+      const futureOrder = {
         ...mockOrder,
-        datetime_start: now.subtract(1, 'hour').toISOString(),
+        datetime_start: now.add(1, 'hour').toISOString(),
       };
 
       const mockQuery = vi.fn().mockResolvedValue({
         data: {
-          order: pastOrder,
+          order: futureOrder,
         },
       });
 
diff --git a/packages/graphql/api/orders.ts b/packages/graphql/api/orders.ts
index 69f4699..5ea36f1 100644
--- a/packages/graphql/api/orders.ts
+++ b/packages/graphql/api/orders.ts
@@ -8,7 +8,7 @@ import { ServicesService } from './services';
 import { SlotsService } from './slots';
 import { type VariablesOf } from '@graphql-typed-document-node/core';
 import { isCustomerMaster } from '@repo/utils/customer';
-import { getMinutes, isBeforeNow } from '@repo/utils/datetime-format';
+import { getMinutes, isBeforeNow, isNowOrAfter } from '@repo/utils/datetime-format';
 import dayjs from 'dayjs';
 
 export const ERRORS = {
@@ -381,7 +381,7 @@ export class OrdersService extends BaseService {
     if (
       state === GQL.Enum_Order_State.Completed &&
       existingOrder?.datetime_start &&
-      isBeforeNow(existingOrder?.datetime_start, 'minute')
+      isNowOrAfter(existingOrder?.datetime_start, 'minute')
     ) {
       throw new Error(ERRORS.CANNOT_COMPLETE_BEFORE_START);
     }
diff --git a/packages/utils/src/datetime-format.ts b/packages/utils/src/datetime-format.ts
index 0703a71..7be0d27 100644
--- a/packages/utils/src/datetime-format.ts
+++ b/packages/utils/src/datetime-format.ts
@@ -106,8 +106,8 @@ export function isBeforeNow(date: Date | string, unit: OpUnitType = 'day') {
   return inputDate.isBefore(now, unit);
 }
 
-export function isNowOrAfter(date: Date | string) {
-  return !isBeforeNow(date);
+export function isNowOrAfter(date: Date | string, unit: OpUnitType = 'day') {
+  return !isBeforeNow(date, unit);
 }
 
 export function sumTime(datetime: DateTime, durationMinutes: number) {