Seattle, Washington sales tax rate: 10.55%
Last updated Checked monthly
The sales tax rate in Seattle, Washington is 10.55%. That’s the 6.5% state rate plus 4.05% in local taxes. It’s higher than 105 of the 110 Washington cities we checked.
Calculated by the 
Sales Tax APIThe same engine Zamp customers use.Seattle combined rate
10.55%
- Washington state
- 6.5%
- King CountyCounty
- 1.5%
- SeattleCity
- 0.25%
- King PTBASpecial district
- 0.9%
- Sound Transit RTASpecial district
- 1.4%
Seattle sales tax calculator
Enter a price and what you’re selling.
- WashingtonState · 6.5%$6.50
- King CountyCounty · 1.5%$1.50
- Seattle City (King County)City · 0.25%$0.25
- King PTBASpecial district · 0.9%$0.90
- Sound Transit RTASpecial district · 1.4%$1.40
Charging this at checkout? Zamp calculates it on every order and files the returns.
Book a demoSeattle sales tax rate breakdown
State, county, city and special district taxes add up to 10.55%. District lines don’t follow city limits, so some Seattle addresses pay a different rate.
| Jurisdiction | Type | Rate |
|---|---|---|
| State of Washington | State | 6.5% |
| King County | County | 1.5% |
| Seattle City (King County) | City | 0.25% |
| King PTBA | Special district | 0.9% |
| Sound Transit RTA | Special district | 1.4% |
| Combined rate | 10.55% |
Rate history
- July 202310.25%
- July 202410.35%
- July 202510.35%
- July 202610.55%
- Today10.55%
Changed since July 2023.
Sales tax near Seattle
Closest cities
- Mercer Island7 mi10.3%
- Bainbridge Island7 mi9.2%
- Kirkland9 mi10.4%
- Bellevue9 mi10.3%
- Shoreline10 mi10.5%
- Burien10 mi10.4%
- Lake Forest Park10 mi10.4%
- Kenmore10 mi10.3%
Elsewhere in King County
- Bellevue10.3%
- Kent10.4%
- Renton10.5%
- Federal Way10.4%
- Kirkland10.4%
- Auburn10.5%
- Shoreline10.5%
- Burien10.4%
- Des Moines10.4%
- Maple Valley9.1%
- Mercer Island10.3%
- Kenmore10.3%
Charge the right rate in Seattle, on every order.
Zamp calculates tax at each customer’s address, special districts included, then files and pays every Washington return for you, with a sales tax team you can call.
Seattle sales tax questions.
Still have questions? Call us at 1-866-438-9267 or email us at support@zamp.com.
What is the sales tax rate in Seattle, Washington?
The combined sales tax rate in Seattle is 10.55% as of November 2, 2026. It’s made up of 6.5% Washington state tax, 1.5% King County, 0.25% Seattle City (King County), 0.9% King PTBA, 1.4% Sound Transit RTA.
Why does Seattle pay King PTBA and Sound Transit RTA tax?
Special districts such as King PTBA and Sound Transit RTA levy their own sales tax on top of the state, county and city rates. District lines don’t always follow city limits, so an address a few streets away can have a different rate. This rate was calculated for Seattle’s 98164 ZIP code; the calculator prices any exact address.
Is SaaS taxable in Seattle?
Yes, at the full 10.55%.
Do online sellers have to collect sales tax in Seattle?
Yes, if they have nexus in Washington: more than $100,000 in Washington sales in the previous or current calendar year, or a physical presence in the state. They register with the Washington State Department of Revenue and charge the rate at the buyer’s address.
Sources. Washington State Department of Revenue · Zamp Sales Tax API, for Seattle’s 98164 ZIP code. Rates are checked monthly and are for information, not tax advice.
Sales tax, off your plate.
Zamp registers you, calculates every order at the customer’s address, files every Washington return and handles notices, with a sales tax team you can call.
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