Washington State Mansion Tax Calculator 2026
Instantly estimate the Washington State Real Estate Excise Tax on your property sale. WA uses a 4-tier marginal system from 1.10% to 3.0%.
WA Real Estate Excise Tax Calculator
Washington State • Instant Estimate
Estimated Real Estate Excise Tax
$45,388
Estimate based on current Washington State tax regulations. Consult a licensed professional for exact figures.
Example: Mansion Tax Calculation for a $3 Million Property in 2026
A property sold for $3,000,000 in Washington State is taxed across three marginal brackets: 1.10% on the first $525k ($5,775), 1.28% on the next $1M ($12,800), and 2.75% on the remaining $1.475M ($40,563), totaling approximately $59,138.
WA Real Estate Excise Tax Brackets — 2026
| Portion of Sale Price | Marginal Rate |
|---|---|
| Up to $525,000 | 1.10% |
| $525,001 – $1,525,000 | 1.28% |
| $1,525,001 – $3,025,000 | 2.75% |
| Over $3,025,000 | 3.00% |
💡 Washington's REET is marginal — each tier's rate only applies to the portion within that bracket, similar to how federal income tax brackets work.
Washington REET FAQ
How is the WA real estate excise tax calculated?
WA uses a 4-tier marginal system: 1.10% up to $525k, 1.28% on $525k–$1.525M, 2.75% on $1.525M–$3.025M, and 3.0% on amounts over $3.025M. Each rate applies only to the portion within that bracket.
Is the WA excise tax marginal or flat?
Marginal. Each rate applies only to the portion within its bracket, similar to income tax brackets. This is more favorable than flat-rate systems like NYC's mansion tax.
Who pays the WA real estate excise tax?
The seller is legally responsible for paying the REET in Washington State. However, the parties may negotiate a different arrangement in the purchase and sale agreement.
Are there any exemptions?
Certain transfers are exempt, including gifts, inheritances, transfers to governmental entities, and court-ordered transfers. There is no minimum price threshold — all sales are subject to REET starting at 1.10%.