Mountlake Terrace, Washington sales tax rate: 10.5%
Last updated Checked monthly
The sales tax rate in Mountlake Terrace, Washington is 10.5%. That’s the 6.5% state rate plus 4% in local taxes. It’s higher than 100 of the 110 Washington cities we checked, and 4 other cities pay the same.
Calculated by the 
Sales Tax APIThe same engine Zamp customers use.Mountlake Terrace combined rate
10.5%
- Washington state
- 6.5%
- Snohomish CountyCounty
- 1.4%
- Snohomish PTBASpecial district
- 1.2%
- Sound Transit RTASpecial district
- 1.4%
Mountlake Terrace sales tax calculator
Enter a price and what you’re selling.
- WashingtonState · 6.5%$6.50
- Snohomish CountyCounty · 1.4%$1.40
- Snohomish PTBASpecial district · 1.2%$1.20
- Sound Transit RTASpecial district · 1.4%$1.40
Charging this at checkout? Zamp calculates it on every order and files the returns.
Book a demoMountlake Terrace sales tax rate breakdown
State, county and special district taxes add up to 10.5%. District lines don’t follow city limits, so some Mountlake Terrace addresses pay a different rate.
| Jurisdiction | Type | Rate |
|---|---|---|
| State of Washington | State | 6.5% |
| Snohomish County | County | 1.4% |
| Snohomish PTBA | Special district | 1.2% |
| Sound Transit RTA | Special district | 1.4% |
| Combined rate | 10.5% |
Rate history
- July 202310.5%
- July 202410.5%
- July 202510.5%
- July 202610.5%
- Today10.5%
No change since July 2023.
Sales tax near Mountlake Terrace
Closest cities
- Lake Forest Park2 mi10.4%
- Edmonds3 mi10.7%
- Shoreline3 mi10.5%
- Woodway4 mi10.6%
- Kenmore4 mi10.3%
- Mill Creek6 mi10.6%
- Kirkland8 mi10.4%
- Mukilteo8 mi10.6%
Elsewhere in Snohomish County
- Everett9.9%
- Marysville9.4%
- Edmonds10.7%
- Lake Stevens9.3%
- Arlington9.3%
- Mukilteo10.6%
- Mill Creek10.6%
- Gold Bar9.1%
- Darrington9.1%
- Woodway10.6%
Charge the right rate in Mountlake Terrace, 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.
Mountlake Terrace 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 Mountlake Terrace, Washington?
The combined sales tax rate in Mountlake Terrace is 10.5% as of November 2, 2026. It’s made up of 6.5% Washington state tax, 1.4% Snohomish County, 1.2% Snohomish PTBA, 1.4% Sound Transit RTA.
Why does Mountlake Terrace pay Snohomish PTBA and Sound Transit RTA tax?
Special districts such as Snohomish PTBA and Sound Transit RTA levy their own sales tax on top of the state, county 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 Mountlake Terrace’s 98043 ZIP code; the calculator prices any exact address.
Is SaaS taxable in Mountlake Terrace?
Yes, at the full 10.5%.
Do online sellers have to collect sales tax in Mountlake Terrace?
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 Mountlake Terrace’s 98043 ZIP code. Rates are checked monthly and are for information, not tax advice.
Sales tax, off your plate.
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