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Starting October 1: Some business services are now subject to retail sales tax, as required by state law, ESSB 5814. When you buy these services, vendors should add sales tax to your bill. If you sell these services, you should begin collecting retail sales tax. Learn more about Services newly subject to retail sales tax.
2023 Excise tax return due dates
Read the information below to find out when your tax return is due. If the due date falls on a weekend or legal holiday, the due date is extended to the next business day.
Monthly due dates
January 2023 return
- Due date: 02/25/23
- 9% penalty begins: 02/28/23
- 19% penalty begins: 04/01/23
- 29% penalty begins: 05/02/23
February 2023 return
- Due date: 03/25/23
- 9% penalty begins: 03/28/23
- 19% penalty begins: 05/02/23
- 29% penalty begins: 06/01/23
March 2023 return
- Due date: 04/25/23
- 9% penalty begins: 04/26/23
- 19% penalty begins: 06/01/23
- 29% penalty begins: 07/01/23
April 2023 return
- Due date: 05/25/23
- 9% penalty begins: 05/26/23
- 19% penalty begins: 07/01/23
- 29% penalty begins: 08/01/23
May 2023 return
- Due date: 06/25/23
- 9% penalty begins: 06/27/23
- 19% penalty begins: 08/01/23
- 29% penalty begins: 09/01/23
June 2023 return
- Due date: 07/25/23
- 9% penalty begins: 07/26/23
- 19% penalty begins: 09/01/23
- 29% penalty begins: 10/03/23
July 2023 return
- Due date: 08/25/23
- 9% penalty begins: 08/26/23
- 19% penalty begins: 10/03/23
- 29% penalty begins: 11/01/23
August 2023 return
- Due date: 09/25/23
- 9% penalty begins: 09/26/23
- 19% penalty begins: 11/01/23
- 29% penalty begins: 12/01/23
September 2023 return
- Due date: 10/25/23
- 9% penalty begins: 10/26/23
- 19% penalty begins: 12/01/23
- 29% penalty begins: 01/03/24
October 2023 return
- Due date: 11/25/23
- 9% penalty begins: 11/28/23
- 19% penalty begins: 01/03/24
- 29% penalty begins: 02/01/24
November 2023 return
- Due date: 12/25/23
- 9% penalty begins: 12/27/23
- 19% penalty begins: 02/01/24
- 29% penalty begins: 03/01/24
December 2023 return
- Due date: 01/25/24
- 9% penalty begins: 01/26/24
- 19% penalty begins: 03/01/24
- 29% penalty begins: 04/02/24
Quarter 1, 2023 return
- Due date: 04/30/23
- 9% penalty begins: 05/02/23
- 19% penalty begins: 06/01/23
- 29% penalty begins: 07/01/23
Quarter 2, 2023 return
- Due date: 07/31/23
- 9% penalty begins: 08/01/23
- 19% penalty begins: 09/01/23
- 29% penalty begins: 10/03/23
Quarter 3, 2023 return
- Due date: 10/31/23
- 9% penalty begins: 11/01/23
- 19% penalty begins: 12/01/23
- 29% penalty begins: 01/03/24
Quarter 4, 2023 return
- Due date: 01/31/24
- 9% penalty begins: 02/01/24
- 19% penalty begins: 03/01/24
- 29% penalty begins: 04/02/24