Do I Need a Business License in Washington State?

If you’re doing business in Washington, you probably need a state business license. The Department of Revenue requires one whenever a business hits any of several triggers: gross income of $12,000 or more per year, collecting sales tax, hiring employees within 90 days, operating under a name other than your full legal name, needing a city or state endorsement, owing taxes or fees to the DOR, or, for out-of-state sellers, exceeding $100,000 in gross receipts sourced to Washington.¹ Most businesses land on at least one of those, so the practical answer for the majority of readers is yes.

The Triggers That Require a License

The DOR’s list is specific, and hitting any single item on it means you register:¹

Gross annual income of $12,000 or more. This is the broadest trigger and applies even to small or part-time operations.
You collect retail sales tax on goods or services, regardless of revenue.
You plan to hire employees within 90 days. Registration also opens accounts with the Department of Labor & Industries and the Employment Security Department for workers’ compensation and unemployment insurance.
You use any business name other than your full legal name.
Your activity requires a city, county, or state endorsement.
You owe taxes or fees to the DOR, including Business & Occupation (B&O) tax.
You’re an out-of-state business with more than $100,000 in gross receipts sourced to Washington in the current or prior year. Physical presence in the state, such as an employee, warehouse, or inventory stored here, triggers registration on its own regardless of dollar volume.²

When your application is approved, the Business Licensing Service (BLS) assigns you a nine-digit Unified Business Identifier (UBI) number.³ The UBI is your state ID number, and you’ll reference it on every tax return and every interaction with state agencies from there on.

The Narrow Case Where You Can Skip It

A sole proprietor operating under their own full legal name, earning less than $12,000 gross per year, with no employees and no sales tax obligation, can technically operate without registering. That’s a genuinely narrow slot. Add a “doing business as” name, cross the $12,000 line, sell a taxable good, or hire one person, and you’re back on the list above.

LLCs and Corporations File With the Secretary of State First

If you’re forming a limited liability company, corporation, or limited partnership, that entity has to exist before you can license it. Register with the Washington Secretary of State first.⁴ The Secretary of State issues the UBI for the legal entity, and you carry that UBI into the BLS application.

Sole proprietors and general partnerships skip this step and go straight to the BLS, since there’s no entity to form. Missing the Secretary of State step is one of the most common delays for LLC and corporation owners, who often assume the DOR business license is the only filing.

City, County, and Home-Based Rules Are Separate

A state business license does not cover local requirements. Many Washington cities require their own local license, called a city endorsement. Some of these can be added directly to your BLS application; the DOR keeps a list of participating cities.⁵ For cities not on that list, contact the city directly. Counties can also have their own rules.

Home-based businesses have an extra layer to think about. Check with your city or county planning department about home occupation permits. Municipalities often restrict signage, foot traffic, employee counts, and the types of activities allowed in residential zones, and those rules exist independently of any business license.

Industry Endorsements and Professional Licenses

Certain industries require specialized endorsements on top of the base license. Contractors register with the Department of Labor & Industries and meet bonding and insurance requirements. Food service businesses need permits from the Department of Health or a local health district. Regulated professions such as real estate agents, engineers, accountants, and childcare providers have their own licensing boards with education, experience, and exam requirements.

The BLS application asks about your activities and routes specialized selections to the relevant agency for additional review. That review is where processing times stretch, because the reviewing agency sets its own timeline.

Operating without a required professional license carries real consequences. For professions governed by the Department of Health, violations can bring civil fines of up to $1,000 per day and criminal charges classified as a gross misdemeanor.⁶ Penalties for other unlicensed activity vary by statute, but regulators treat them seriously.

What You’ll Need to Apply, Cost, and Timing

The application runs online through the DOR’s Business Licensing Service. The DOR recommends starting with its Business Licensing Wizard, which asks about your business and generates a checklist of required endorsements.¹

Have this information ready before you start:

Your legal structure: sole proprietorship, partnership, LLC, or corporation.
Your Federal Employer Identification Number (EIN). Partnerships, LLCs, and corporations all need one from the IRS. A sole proprietor with no employees can use a Social Security Number, though many get an EIN anyway to keep the SSN off business paperwork.⁷
Names, home addresses, and Social Security Numbers for all owners, partners, or corporate officers.
Physical and mailing addresses. Your physical location determines local jurisdiction for endorsements and B&O reporting.
A description of your business activities. The system uses this to assign B&O tax classifications and identify required endorsements.
Estimated annual gross income, which the DOR uses to set your tax filing frequency.
If you formed an LLC or corporation, the entity’s UBI from the Secretary of State.

The base state processing fee to open a new business license is $50.⁸ City endorsements and specialized licenses carry their own additional fees, calculated based on what you select in the application, and you pay electronically at submission.

A standard application takes roughly 10 business days to process. If it includes city or state endorsements that require approval from another agency, add two to three weeks.³ Plan for that if you need the license in hand before signing a lease or opening your doors.

Renewals and Late Fees

Most city and state endorsements renew annually.⁹ The DOR sends a renewal notice about a month before expiration. To avoid penalties, renew every endorsement, submit required documents, and pay all fees by the expiration date printed on the license.

The annual renewal processing fee is $5, on top of individual endorsement fees.⁸ Miss the deadline and a delinquency fee applies: the lesser of $150 or 50 percent of your renewal fee, after subtracting certain corporate taxes and report fees.¹⁰ The DOR can waive the delinquency fee if you have a clean 24-month renewal history or if the late renewal came from an undisputed DOR error, but the waiver is not automatic.

Report changes to the BLS as they happen. A new address, a change in ownership, or expansion into a newly regulated activity all need to be updated so tax filings route correctly and your endorsements stay current.

1
Washington Department of Revenue. Apply for a Business License
2
Washington Department of Revenue. Out of State Businesses Reporting Thresholds and Nexus
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Washington Department of Revenue. Business Licensing and Renewals FAQs
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Washington Secretary of State. Limited Liability Company and Professional LLC Filing Resource Page
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Washington Department of Revenue. City Endorsements
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Washington State Legislature. RCW 18.130.190 – Practice Without License
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Internal Revenue Service. Employer Identification Number
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Washington Department of Revenue. Variable Business License Processing Fees
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Washington Department of Revenue. Get or Renew Your Business License
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Washington State Legislature. RCW 19.02.085 – Licensing Fees, Business License Delinquency Fee