WA State Licensing: State tax registration

State tax registration

State tax registration is required if you answer “yes” to any of the questions listed below. A tax registration cannot be transferred to another business.

  • Do you plan to gross over $12,000 per year?
  • Will you be selling at retail any item or product?
  • Will you be repairing, installing, altering, decorating, or improving any item or product for another person (for example, car repair, construction)?
  • Will you engage in a business that is responsible for any other state taxes (for example, timber, fish, litter, public utility, hazardous substance/waste)?

Note: When you register you will receive a state business license and UBI (Unified Business Identifier) number. A business license must be posted at each location where the licensee operates.

How to get tax registration

File online with My DOR.

    Learn how to:

By mail

  1. Complete the Business License Application.
  2. Mail your completed application with a check or money order payable to “Department of Revenue” for the fees to:
    State of Washington
    Business Licensing Service
    PO Box 9034
    Olympia, WA 98507-9034

In person

  1. Complete the Business License Application.
  2. Bring your completed application and fees to any business licensing office.


Transaction Fee
State tax registration No fee
Registering your business name as a trade name $5
Business License Application fee $19 (non-refundable)

Contact information

Business Licensing Service
State of Washington
PO Box 9034
Olympia, WA 98507-9034

Phone: 360-705-6741
Email: BLS@dor.wa.gov
Fax: 360-705-6699

Office hours

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

Mailing information

Please remember to enclose all necessary documents and fees with your completed application. Incomplete submissions will result in a delay in your licensure.

It is important that you contact our office, in writing, with any changes in address.

Regulatory questions

Department of Revenue
Phone: 360-705-6705