City business license guide
Last updated: October 3, 2026
Starting in Seattle means checking several layers. The main city step is the Seattle business license tax certificate. The City also calls it a business license or general business license. That certificate does not cover every permit.
This guide explains the city, county, state, and federal steps in plain English. Use it before you open, lease space, sell from home, hire, add a sign, sell food, or use public space.
Bottom line
Most businesses doing business in Seattle need a Seattle business license tax certificate. Seattle directs owners to apply or renew through FileLocal, where the city certificate is called a general business license. The certificate expires December 31 and is renewed each year.
A narrow 2026 exemption can apply when a person or business has $4,000 or less in annual Seattle-sourced value, sales proceeds, or gross income and has no place of business in Seattle. That exemption does not erase regulatory licenses or special permits. Also check zoning, activity permits, Washington State registration, and any federal steps that fit your business.
Quick start: what to check first
- Describe the business. Note what you sell, the exact address or service area, customer visits, employees, and any food, alcohol, signs, vehicles, construction, or regulated work.
- Check the Seattle certificate. Most businesses doing business in Seattle need it unless an exemption or safe harbor applies.
- Check the address before a lease. Review zoning, permit history, and the last legally permitted use.
- Check King County activity permits. Food, mobile food, temporary food, plumbing, gas-piping, and health approvals may apply inside Seattle.
- Check Washington State. You may need a Business License Application, tax registration, trade name, employer accounts, entity filing, or industry license.
- Check federal steps when relevant. Many employers and entities need an EIN; some industries need federal permits.
For the basic decision first, see do you need a business license, then return here for Seattle-specific steps.
Seattle business changes: April 1–October 1, 2026
Washington entity-filing rules changed June 11, 2026. The Secretary of State says a Washington-based remote worker, by itself, no longer makes a foreign entity “doing business” in Washington for entity-registration purposes. The same law package also lets nonprofit corporations and limited liability partnerships file an initial report at formation without an added initial-report fee. These are state filing changes; they do not replace Seattle licensing, tax, zoning, or permit rules.
Washington contractor and related trade-program fees increased July 1, 2026. Labor & Industries adopted a 6.51% fee increase for contractor registration and several trade programs. The current contractor registration issuance/renewal amount is $150.20. A Seattle contractor should check the current L&I registration page before budgeting or renewing.
Seattle business license facts box
| Topic | Seattle detail | What to check |
|---|---|---|
| Main city requirement | Seattle business license tax certificate, also called a business license or general business license | Apply or renew through FileLocal or by mail using the current city process. |
| City office | Seattle Office of City Finance, License and Tax Administration | Use the official business license page for current rules and fees. |
| Renewal | Annual renewal | The City says certificates expire December 31 and are renewed each year. |
| Small out-of-city exemption | Possible certificate exemption | Effective 2026, the threshold is $4,000 or less in annual Seattle-sourced value, sales proceeds, or gross income, with no place of business in Seattle. Regulatory permits can still apply. |
| City tax layer | Seattle business and occupation tax | Seattle B&O tax is separate from Washington State B&O tax. In 2026, the general city tax threshold is $2 million, but filing can still be required below it. |
| County layer | King County activity permits | Seattle businesses may still need county food, plumbing, gas-piping, or health approvals depending on the activity. |
What does this mean for me?
If you do business in Seattle, check the city license early. A freelancer at home, a Ballard shop, a contractor working at customer sites, a nonprofit, and an online seller can have different extra steps, but many start with the same Seattle business license tax certificate.
The city certificate does not approve zoning, food, signs, fire, trade names, state taxes, professional work, alcohol, contractor registration, or federal permits. For a fixed site, use SDCI’s property and permit research tools and address lookup. Home businesses should also check Seattle’s current home-business rules and our wider guide on whether you can run a business from home.
City, county, state, and federal license layers
City of Seattle requirements
Seattle says people doing business in the city need a business license tax certificate unless an exemption or safe harbor applies. It covers many retail, service, wholesale, professional, manufacturing, home-based, and nonprofit activities. The owner needs the certificate, not each employee, and an out-of-city business can still need it for Seattle activity.
For 2026, the small out-of-city exemption is $4,000 or less in annual Seattle-sourced value, sales proceeds, or gross income and no place of business in Seattle. Specialized permits can still apply.
Seattle B&O tax is a separate city layer. The Seattle Shield guidance says the 2026 general B&O threshold is $2 million and a separate $2 million standard deduction can apply above it. Businesses below the tax threshold may still have to file a city return.
King County requirements
King County’s listed business licenses focus on regulated activities in unincorporated King County. A business inside Seattle should not assume it needs a general county license. County activity permits still matter: Public Health handles food businesses, including mobile food and temporary food, plus certain plumbing and gas-piping permits.
Washington State requirements
Washington may require a Business License Application. Current triggers include needing an endorsement, using a name other than your full legal name, planning to hire within 90 days, collecting sales tax, having gross income of $12,000 or more per year, or owing DOR taxes or fees. Use the DOR licensing FAQs and My DOR application instructions.
LLCs, corporations, and other entities that must file with the Secretary of State should do that before the state Business License Application. Use the current entity filing page. Public names that differ from the legal name may also need a Washington trade name.
If you hire, the Business License Application registers key employer accounts with L&I and ESD. Then follow quarterly reporting instructions and report new or rehired Washington workers to DSHS within 20 days through new-hire reporting. Contractors should use L&I’s registration path. Alcohol businesses should use the LCB liquor-license guide.
Federal requirements
Many employers and entities need an EIN, which the IRS provides directly for free. Federal permits apply only to certain regulated industries; the SBA licenses and permits page can route you to the right agency.
FinCEN currently exempts U.S.-created entities and U.S. persons from BOI reporting. Certain foreign entities registered to do business in the United States can still be reporting companies. Use FinCEN’s current BOI page.
Private platform rules
Marketplaces, apps, landlords, and insurers may ask for license, tax, or insurance proof, but their rules do not replace government requirements. See our online business license guide for more context.
Costs you can plan for
Official fee pages control. Endorsements, inspections, construction, reviews, and late fees can add to these amounts.
| Cost item | Verified detail as of October 1, 2026 | Where to confirm |
|---|---|---|
| Seattle certificate | 2026 annual fees: $73 for $0-$19,999; $147 for $20,000-$499,999; $667 for $500,000-$1,999,999; $1,604 for $2,000,000-$4,999,999; $3,210 for $5,000,000 or more. Branches are $10. A first-year fee is half when starting July 1 or later. | Seattle fees |
| Seattle late renewal | No license-renewal penalty through January; $10 in February; $20 on March 1 or later. | Seattle license page |
| Washington Business License Application | $50 to open/reopen; $0 to add a location or nonresident city endorsement; $10 for many other purposes; $5 annual renewal processing fee. Other endorsement fees can apply. | DOR fees |
| Washington trade name | $5 per trade name, plus the applicable application processing fee. | Trade names |
| Secretary of State profit entity | Many original profit-entity filings are $180; profit annual reports, including LLCs, are $70. Priority or submission method can add fees. | SOS fees |
| Contractor registration | L&I lists $150.20 for issuance or renewal after the July 1, 2026 increase. | L&I |
Already posted for 2027: Seattle lists January 1, 2027 fees of $76, $154, $697, $1,677, and $3,355 across the same revenue bands; branches remain $10. Recheck when renewing.
Zoning, home occupation, building, fire, sign, and industry permits
Zoning and building use
Zoning comes before the lease. Seattle says a new business may need several permits. SDCI determines a change of use from the last legally permitted use in its records, and a change of use always requires a building permit. Use SDCI’s research tools to check zoning and permit history first. A certificate of occupancy is required for some projects, including certain changes of use.
Home businesses
Seattle’s current Land Use Code treats a resident’s home occupation as an accessory use permitted outright, subject to SMC 23.42.050. The City’s home business rules say the operator must live in the unit, the home must remain residential in character, signs are limited, and noise, odors, or similar impacts cannot be detectable at the property line. Some activities, including child care, follow different rules.
Seattle does not present every home business as needing a separate generic “home occupation permit.” Check whether the activity fits the standards or triggers another permit or license.
Permit trigger table
| Situation | Office | Direct path |
|---|---|---|
| Storefront, office, studio, shop, warehouse, or change of use | SDCI | New Businesses and the Seattle Services Portal. |
| Permanent food business | Public Health – Seattle & King County | Food business permits. |
| Mobile or temporary food | Public Health; SDOT if vending in public right-of-way | Mobile food, temporary food, and Seattle vending permits. |
| Propane, assemblies, hazardous materials, hot work | Seattle Fire | Fire permits. |
| Business sign or awning | SDCI; sometimes SDOT | Sign permit guidance. |
| Alcohol sales or service | Washington LCB | Liquor licensing. |
| Construction contracting | Washington L&I | Contractor registration. |
| Seattle-regulated activity | City regulatory program | Seattle Business Regulations. |
SDOT proposed a vending-rule update in 2026, but as of October 1 its active-rules list still shows SDOT 01-2023 as the active vending rule. Do not treat the draft as final.
Real-world examples
Freelance designer in a Seattle apartment
Check the city certificate, B&O filing, home-business rules, and Washington registration triggers. No storefront does not mean no local rules.
Coffee shop taking over retail space
Check the city certificate, last permitted use, SDCI change-of-use/buildout needs, King County food approval, signs, and fire items. Add liquor licensing if alcohol will be served.
Food truck on private land and public curb space
Separate city licensing, King County mobile-food approval, private-property zoning, and SDOT vending approval. Propane or open flame can add Fire requirements. See our food truck permit guide.
Remodeling contractor at Seattle jobs
Check the Seattle certificate, Washington DOR registration, and L&I contractor registration. Project permits are separate.
Common mistakes to avoid
- Using the old $2,000 Seattle exemption. The 2026 threshold is $4,000 and only applies when the business also has no place of business in Seattle.
- Confusing the Seattle certificate with the Washington State business license. They are different layers.
- Signing a lease before checking the last permitted use. A new activity can trigger a change-of-use or construction permit even when the space already housed a business.
- Assuming every home business needs a generic home occupation permit. Seattle’s current code permits home occupations outright when they meet the standards, but separate approvals can still apply to the activity.
- Thinking the city certificate covers food, alcohol, contractor registration, fire, signs, or street vending. These have separate routes.
- Ignoring employer follow-up. The Business License Application sets up key state employer accounts, but employers still have quarterly reporting duties and a separate 20-day new-hire reporting duty.
- Forgetting annual renewal. Seattle business license tax certificates expire December 31.
A compact compliance checklist
- Business name and owner or entity are clear.
- Secretary of State formation or foreign registration is checked when the entity type requires it.
- Washington Business License Application, tax registration, and trade name are checked through DOR.
- Seattle business license tax certificate is applied for or the exact exemption/safe harbor is confirmed.
- Seattle B&O return filing duties are checked even if no city B&O tax is expected.
- The exact address, zoning, permit history, and last legally permitted use are checked before a lease or buildout.
- Current Seattle home-business standards are checked if work happens at a residence.
- King County permanent, mobile, or temporary food approval is checked if food is involved.
- Seattle fire, sign, street-use, vending, and regulated-business permits are checked when the activity triggers them.
- Alcohol, contractor, professional, or other Washington industry licensing is checked separately.
- If hiring, workers’ compensation, unemployment insurance, quarterly reports, and 20-day new-hire reporting are set up.
- IRS EIN and any truly relevant federal permit are checked.
Phone and email scripts
Have the business name, owner, exact address or service area, start date, activity, customer visits, employee plans, and regulated details ready.
Hello, I am starting a [business type] in Seattle at [address or area]. Does the business license tax certificate apply, does an exemption or safe harbor fit, what B&O return filing will I have, and does my activity need another city regulatory license?
Seattle publishes tax@seattle.gov and 206-684-8484 for license and tax questions.
Hello, I plan to operate a [business type] at [address]. The last permitted use appears to be [prior use]. Does my plan trigger a change of use, construction permit, occupancy approval, or sign review?
Hello, I want to operate a [permanent / mobile / temporary] food business in Seattle. Which plan review and operating permit path applies, and do I need a commissary, pre-opening inspection, or plumbing review?
Hello, I am starting a [business type] in Seattle, expect [revenue], will [hire / not hire], and will [perform / not perform] regulated work. Which business-license, tax, trade-name, employer, or industry-license steps apply?
What to do if this does not work
If a portal does not answer your facts, send a short written question to the agency and save the reply. Include the exact address, activity, customer visits, employee plans, food or alcohol details, contractor or professional work, and any public right-of-way use.
If one office seems to conflict with another, ask which government layer controls that issue. Seattle may control zoning and the city certificate. King County may control food or plumbing. Washington State may control tax registration, trade names, employer accounts, liquor licensing, or contractor registration. A landlord, marketplace, or other private rule does not replace government requirements.
Official resources for Seattle business owners
- Seattle business license tax certificate
- FileLocal – Seattle application, renewal, and city tax filing
- Seattle Shield B&O tax changes
- SDCI property, zoning, and permit research
- Seattle Services Portal
- Seattle home business rules
- King County food business permits
- Washington Business License Application instructions
- Washington hiring-employees registration path
- Washington Secretary of State Corporations & Charities
- Washington contractor registration
- Washington liquor licensing
- Washington new-hire reporting
About BusinessLicenseGuide.com
BusinessLicenseGuide.com is a plain-English licensing guide for ordinary small-business owners. We are not a law firm, CPA firm, filing company, government agency, or permit expediter. We help you map the main license, permit, tax, zoning, and agency layers.
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FAQ
Does Seattle require a business license?
Most businesses doing business in Seattle need a Seattle business license tax certificate. Effective 2026, a narrow exemption can apply when annual Seattle-sourced value, sales proceeds, or gross income is $4,000 or less and the business has no place of business in Seattle. Special permits can still apply.
Where do I apply for a Seattle business license tax certificate?
Seattle directs owners to apply or renew through FileLocal, or by mail using the current city application. FileLocal calls the Seattle certificate a general business license.
Do I need a Washington State business license too?
You may need one if you meet a state trigger, such as needing an endorsement, using a trade name, planning to hire within 90 days, collecting sales tax, having gross income of $12,000 or more per year, or owing DOR taxes or fees.
Does King County issue a general business license for Seattle businesses?
A business inside Seattle should not assume it needs a general King County license. County permits can still apply by activity, including food, plumbing, gas piping, and public health approvals.
Do home businesses in Seattle need to check zoning?
Yes. Seattle permits home occupations when current code standards are met. The operator must live in the unit, the home must stay residential in character, signs are limited, and noise, odors, or similar impacts cannot be detectable at the property line. Some activities follow separate rules.
Do online businesses in Seattle need the city certificate?
They can. An online business operated from Seattle, or otherwise doing business in Seattle, should check the city certificate rules. Selling online does not replace city zoning, tax, or state registration requirements.
Update note
Last updated: October 3, 2026
Next review: January 1, 2027
This review rechecked Seattle licensing, tax, zoning, home-business, use/occupancy, food, vending, state filing, employer, contractor, liquor, portal, fee, and federal starting points. In the April 1–October 1 review period, Washington entity-filing rules changed June 11 and L&I trade-program fees changed July 1. The old $2,000 Seattle exemption was corrected to the $4,000 threshold that took effect before this review period.
Disclaimer
This guide is for general information only. Business license, tax, zoning, permit, and filing rules can change and can depend on your exact address and activity. Confirm current requirements with the official agency before you apply, pay a fee, sign a lease, or begin operating.