Washington business filing due dates

The Washington deadlines Ordexly tracks for Oct 2026 to Oct 2027. Every date links to the agency page it was checked against (last checked Oct 14, 2026). Which ones apply to a business depends on its registrations and filing frequency, so confirm with the agency.

Annual report based on formation date

Washington Annual Report (anniversary month). Due by the last day of the anniversary month of formation/registration (WA CCFS). Official source.

Ordexly works out this date for each business from its formation month.

Excise tax

Due	Deadline	Source
Mon, Oct 26, 2026	Washington Combined Excise Tax (monthly filers) September 2026 return	official source
Mon, Nov 2, 2026	Washington Combined Excise Tax (quarterly filers) Q3 2026	official source
Wed, Nov 25, 2026	Washington Combined Excise Tax (monthly filers) October 2026 return	official source
Mon, Dec 28, 2026	Washington Combined Excise Tax (monthly filers) November 2026 return	official source
Mon, Jan 25, 2027	Washington Combined Excise Tax (monthly filers) December 2026 return	official source
Mon, Feb 1, 2027	Washington Combined Excise Tax (quarterly filers) Q4 2026	official source
Thu, Feb 25, 2027	Washington Combined Excise Tax (monthly filers) January 2027 return	official source
Thu, Mar 25, 2027	Washington Combined Excise Tax (monthly filers) February 2027 return	official source
Thu, Apr 15, 2027	Washington Annual Combined Excise Tax 2027	official source
Mon, Apr 26, 2027	Washington Combined Excise Tax (monthly filers) March 2027 return	official source
Fri, Apr 30, 2027	Washington Combined Excise Tax (quarterly filers) Q1 2027	official source
Tue, May 25, 2027	Washington Combined Excise Tax (monthly filers) April 2027 return	official source
Fri, Jun 25, 2027	Washington Combined Excise Tax (monthly filers) May 2027 return	official source
Mon, Jul 26, 2027	Washington Combined Excise Tax (monthly filers) June 2027 return	official source
Mon, Aug 2, 2027	Washington Combined Excise Tax (quarterly filers) Q2 2027	official source
Wed, Aug 25, 2027	Washington Combined Excise Tax (monthly filers) July 2027 return	official source
Mon, Sep 27, 2027	Washington Combined Excise Tax (monthly filers) August 2027 return	official source
Mon, Oct 25, 2027	Washington Combined Excise Tax (monthly filers) September 2027 return	official source

Unemployment / reemployment

Due	Deadline	Source
Mon, Nov 2, 2026	Washington Unemployment Tax Report Q3	official source
Mon, Feb 1, 2027	Washington Unemployment Tax Report Q4	official source
Fri, Apr 30, 2027	Washington Unemployment Tax Report Q1 2027	official source
Mon, Aug 2, 2027	Washington Unemployment Tax Report Q2 2027	official source

Free: add Washington due dates to your calendar

Subscribe to this public calendar and the Washington deadlines on this page show up in your calendar app, with updates when we publish changes. Free, no account needed.

Subscribe (Apple, Outlook) Add to Google Calendar Download .ics

Nearby: Idaho due dates · Oregon due dates

Get these on your calendar

Ordexly puts the Washington and federal deadlines that apply to each business or client on one calendar feed (Google, Outlook or Apple), with email reminders before each one is due. Every plan starts with a free trial: 60 days on Firm, 14 days on Owner, Solo and Practice. You enter a card at checkout and nothing is charged until the trial ends; cancel in one click before then. Founding members (first 25, on Solo, Firm and Practice) get FOUNDING50: 50% off the first 14 paid months on monthly billing, or the first year on yearly billing.

See plans

Federal due dates · All states · Washington coverage details