Audit a large purchase
Separate included tax on equipment, furniture, or another high-value purchase made in Seattle.
Local reverse-tax guide
Seattle Reverse Sales Tax Calculator
A final price does not reveal how much was charged before tax. This Seattle calculator reverses the 10.35% reference rate and shows the subtotal, included tax, and total side by side.
Reference location: King County. Confirm current address-level rates with Washington State Department of Revenue.
Calculate in seconds
Enter the total you paid and the tax rate
$
The final price you paid%
Seattle, WA combined rateReverse the included tax
Divide the total by 1.1035
The rate was added to the original price. Dividing by the tax multiplier reverses it correctly; subtracting 10.35% from the final total does not.
Seattle pre-tax formula= Total paid / 1.1035Included tax = Total paid - Original price
Worked with 10.35%
Seattle reverse-tax examples
Each amount below is treated as a final price that already includes the 10.35% reference rate. Results are rounded to the nearest cent.
| Total paid | Price before tax | Tax included |
|---|---|---|
| $40.00 | $36.25 | $3.75 |
| $120.00 | $108.74 | $11.26 |
| $300.00 | $271.86 | $28.14 |
| $750.00 | $679.66 | $70.34 |
State and local rate combined
Seattle rate breakdown
Seattle's reference rate combines a 6.5% state portion with 3.85% in local taxes. City, county, transit, and special-district boundaries can affect the exact local mix.
| Rate component | Reference rate | What it represents |
|---|---|---|
| Washington state portion | 6.5% | State-level portion used by this city record |
| Local combined portion | 3.85% | City, county, transit, or district taxes combined |
| Seattle reference total | 10.35% | King County |
City boundaries and special districts can change the exact rate. Use the transaction rate or verify the address with Washington State Department of Revenue.
Use the calculator carefully
Which rate should you use in Seattle?
Reverse-tax math is exact only when the total and percentage describe the same taxable transaction.
Review a multi-item total
Use the calculator after confirming that the same rate applies to the taxable items in the total.
Confirm the location
Check King County or the official address locator when a store sits near a taxing boundary.
Local context
Seattle compared with the Washington average
Seattle's 10.35% reference rate is 0.78 percentage points above Washington's 9.57% average. A statewide average is useful for context, but the transaction location is more useful for checking a receipt.
Seattle ranks #2 by combined rate among the 4 supported Washington city pages.
On a $100 tax-inclusive total$90.62estimated pre-tax price at 10.35%
Questions answered
Seattle Sales Tax Questions
What sales tax rate should I use for Seattle?
Start with the 10.35% combined reference rate shown here, but use the exact rate on the receipt or the official address lookup whenever it is available.
How do I remove Seattle sales tax from a total?
Divide the tax-inclusive total by 1.1035. For example, a total of $110.35 at 10.35% becomes $100.00 before tax.
How is the Seattle reference rate built?
It combines a 6.5% state portion with 3.85% in local taxes. The local total may include more than one taxing jurisdiction.
Why might a Seattle receipt show a different rate?
The purchase may fall outside city limits, use a different local district, involve an exempt or specially taxed item, or follow delivery and sourcing rules. The receipt and official address lookup are the best checks.
Can I use this Seattle calculator for refunds or expenses?
Yes. It can separate a final amount into the estimated pre-tax price and included tax. Keep the original receipt and official rate evidence when documentation is required.
Official rate check
Verify before filing or collecting tax
This page is for receipt checks and estimates. Use the official state authority for current address-level rates, exemptions, sourcing rules, and compliance decisions.
Nearby comparisons