Seattle Sales Tax Calculator
The combined sales tax rate in Seattle, Washington is 10.55% in 2026 — a 6.5% Washington state rate plus 4.05% in local add-ons. That is the 6th highest rate of the 280 Washington cities we track, and it runs above Washington's 9.47% average. On a $100 purchase that's $10.55 in tax for a $110.55 total.
$100.00 total
Before tax: $100.00 · Sales tax: $0.00 (0%)
State & average combined rates: Tax Foundation 2026. Local rates vary by city/county — adjust the rate for an exact figure. How we calculate →
Seattle sales tax rate in 2026
Seattle charges a combined sales tax rate of 10.55%: the Washington statewide base of 6.5% plus 4.05% in city and county add-ons. Seattle is in King County.
That local add-on is set by Seattle and the taxing districts that overlap it, which is why neighboring cities in Washington can charge a different total even a few miles apart.
Seattle vs the rest of Washington
At 10.55%, Seattle runs above Washington's 9.47% statewide average combined rate by 1.08%. Among the 280 Washington cities we track by combined rate, Seattle ranks the 6th highest.
That puts Seattle on the higher end for Washington — worth double-checking against the official lookup tool if you're quoting a price to a customer or filing a return.
Sales tax examples in Seattle
At Seattle's 10.55% combined rate:
$100 → $10.55 tax, $110.55 total · $1,000 → $105.50 tax, $1,105.50 total · $25,000 car purchase → $2,637 tax, $27,637 total.
Working backwards: a $1,110.00 receipt total in Seattle means the pre-tax price was $1,004.07 and $105.93 was tax — use “Remove tax” mode above to reverse any total instantly.
A note on Seattle's exact rate
The 10.55% rate applies within Seattle's official city limits as published by Washington DOR — Tax Rate Lookup. Addresses with a Seattle mailing address but outside the incorporated city line — a common situation on the edges of any city — can fall under a different, usually lower, rate.
For an address-exact rate, use the official lookup tool: Washington DOR — Tax Rate Lookup. This calculator pre-fills the published city-limits rate as a reliable starting point.
Seattle sales tax — frequently asked questions
What is the sales tax rate in Seattle, Washington?
Seattle's combined sales tax rate is 10.55% in 2026 — 6.5% Washington state tax plus 4.05% in local add-ons. That's the 6th highest rate of the 280 Washington cities we track.
How much is sales tax on $100 in Seattle?
At Seattle's 10.55% rate, sales tax on a $100 purchase is $10.55, for a $110.55 total.
How much sales tax will I pay on a $25,000 car in Seattle?
At Seattle's 10.55% combined rate, sales tax on a $25,000 vehicle purchase is about $2,637, for a $27,637 total before any trade-in credit or registration fees.
Is Seattle's sales tax higher or lower than the Washington average?
Seattle runs above Washington's 9.47% statewide average by 1.08%, ranking the 6th highest of the 280 Washington cities we track.
How do I calculate sales tax backwards from a total in Seattle?
Divide the total by 1 plus the rate. A $1,110.00 total in Seattle works back to a $1,004.07 pre-tax price and $105.93 of tax. Use “Remove tax” mode above to do this automatically.
Does Seattle's sales tax rate apply everywhere in the Seattle area?
The 10.55% rate applies within Seattle's official city limits. Nearby addresses outside the incorporated boundary can be taxed at a different rate — check Washington DOR — Tax Rate Lookup for an address-exact figure.
Compare nearby cities in Washington
See all 280 Washington cities ranked by combined sales tax rate, or compare:
Researched & verified by the Calcuris Data & Research Team. How we build and check our tools →