Attention! As you may be aware, WSDOT will permanently close the Alaskan Way Viaduct on Jan. 11, 2019, beginning the Seattle Squeeze. As the ability to travel to the Seattle Municipal Tower to conduct business will be constrained during the SR 99 shutdown and beyond, we highly encourage our customers take advantage of our online portal, FileLocal, which allows businesses to apply for a new license, renew an existing license, file taxes and make business information changes. Our office will be open during normal business hours, Monday-Friday, 8 a.m.-5 p.m. If you must come in, plan for potential travel delays, especially during the typical peak morning and afternoon commute times. 

Seattle business licenses and taxes

If you do business in Seattle, you must:

You can manage all your needs online, including applying and renewing your license and filing and paying your taxes.

Regulatory endorsements

The City of Seattle regulates taxis, adult entertainment, towing companies and some other business types. These businesses require both a standard business license tax certificate and a regulatory endorsement added to the license tax certificate. For more information, see businesses that require a regulatory endorsement.

Supporting business in Seattle

In addition to the helpful information on these pages, the Office of Economic Development's Small Business team offers resources and assistance for starting and growing a business in Seattle.


City tax laws
City tax rules

Contact us

Business license tax certificates and taxes

Visit us

Seattle Municipal Tower
700 Fifth Ave.
42nd floor
Seattle, WA 98124

Open Monday through Friday
8 a.m. to 5 p.m.

Mailing Address
P.O. Box 34214
Seattle, WA 98124-4214