Federal Way, Washington sales tax rate: 10.4%
Last updated Checked monthly
The sales tax rate in Federal Way, Washington is 10.4%. That’s the 6.5% state rate plus 3.9% in local taxes. It’s higher than 94 of the 110 Washington cities we checked, and 5 other cities pay the same.
Calculated by the 
Sales Tax APIThe same engine Zamp customers use.Federal Way combined rate
10.4%
- Washington state
- 6.5%
- King CountyCounty
- 1.5%
- Federal WayCity
- 0.1%
- King PTBASpecial district
- 0.9%
- Sound Transit RTASpecial district
- 1.4%
Federal Way sales tax calculator
Enter a price and what you’re selling.
- WashingtonState · 6.5%$6.50
- King CountyCounty · 1.5%$1.50
- Federal Way City (King County)City · 0.1%$0.10
- 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 demoFederal Way sales tax rate breakdown
State, county, city and special district taxes add up to 10.4%. District lines don’t follow city limits, so some Federal Way addresses pay a different rate.
| Jurisdiction | Type | Rate |
|---|---|---|
| State of Washington | State | 6.5% |
| King County | County | 1.5% |
| Federal Way City (King County) | City | 0.1% |
| King PTBA | Special district | 0.9% |
| Sound Transit RTA | Special district | 1.4% |
| Combined rate | 10.4% |
Rate history
- July 202310.1%
- July 202410.2%
- July 202510.2%
- July 202610.4%
- Today10.4%
Changed since July 2023.
Sales tax near Federal Way
Closest cities
- Des Moines5 mi10.4%
- Fife6 mi10.2%
- Auburn6 mi10.5%
- Tacoma7 mi10.5%
- Sumner8 mi9.7%
- Kent8 mi10.4%
- Ruston8 mi10.2%
- Normandy Park8 mi10.3%
Elsewhere in King County
- Seattle10.55%
- Bellevue10.3%
- Kent10.4%
- Renton10.5%
- Kirkland10.4%
- Auburn10.5%
- Shoreline10.5%
- Burien10.4%
- Des Moines10.4%
- Maple Valley9.1%
- Mercer Island10.3%
- Kenmore10.3%
Charge the right rate in Federal Way, 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.
Federal Way 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 Federal Way, Washington?
The combined sales tax rate in Federal Way is 10.4% as of November 2, 2026. It’s made up of 6.5% Washington state tax, 1.5% King County, 0.1% Federal Way City (King County), 0.9% King PTBA, 1.4% Sound Transit RTA.
Why does Federal Way 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 Federal Way’s 98003 ZIP code; the calculator prices any exact address.
Is SaaS taxable in Federal Way?
Yes, at the full 10.4%.
Do online sellers have to collect sales tax in Federal Way?
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 Federal Way’s 98003 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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