Lake Forest Park, Washington sales tax rate: 10.4%
Last updated Checked monthly
The sales tax rate in Lake Forest Park, 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.Lake Forest Park combined rate
10.4%
- Washington state
- 6.5%
- King CountyCounty
- 1.5%
- Lake Forest ParkCity
- 0.1%
- King PTBASpecial district
- 0.9%
- Sound Transit RTASpecial district
- 1.4%
Lake Forest Park sales tax calculator
Enter a price and what you’re selling.
- WashingtonState · 6.5%$6.50
- King CountyCounty · 1.5%$1.50
- Lake Forest Park 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 demoLake Forest Park 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 Lake Forest Park addresses pay a different rate.
| Jurisdiction | Type | Rate |
|---|---|---|
| State of Washington | State | 6.5% |
| King County | County | 1.5% |
| Lake Forest Park 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 202310.2%
- July 202410.3%
- July 202510.3%
- July 202610.4%
- Today10.4%
Changed since July 2023.
Sales tax near Lake Forest Park
Closest cities
- Kenmore2 mi10.3%
- Mountlake Terrace2 mi10.5%
- Shoreline3 mi10.5%
- Edmonds5 mi10.7%
- Woodway5 mi10.6%
- Kirkland6 mi10.4%
- Mill Creek8 mi10.6%
- Seattle10 mi10.55%
Elsewhere in King County
- Seattle10.55%
- 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%
Charge the right rate in Lake Forest Park, 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.
Lake Forest Park 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 Lake Forest Park, Washington?
The combined sales tax rate in Lake Forest Park is 10.4% as of November 2, 2026. It’s made up of 6.5% Washington state tax, 1.5% King County, 0.1% Lake Forest Park City (King County), 0.9% King PTBA, 1.4% Sound Transit RTA.
Why does Lake Forest Park 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 the centre of Lake Forest Park; the calculator prices any exact address.
Is SaaS taxable in Lake Forest Park?
Yes, at the full 10.4%.
Do online sellers have to collect sales tax in Lake Forest Park?
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 the centre of Lake Forest Park. Rates are checked monthly and are for information, not tax advice.
Sales tax, off your plate.
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