King County Transfer Tax
King County (all cities, including Seattle) charges 0.5% of the purchase price on top of the Washington state tax (marginal brackets: 1.1% up to $525,000, 1.28% from $525,000 to $1,525,000, 2.75% from $1,525,000 to $3,025,000, 3% above $3,025,000). On a $644,300 home that is $10,524 in total. 0.50% local REET added to the graduated state rate on the ENTIRE sale price (not marginal against the state tiers), applies in every King County city including Seattle.
King County (all cities, including Seattle) transfer tax by purchase price
| Purchase price | State tax | King County (all cities, including Seattle) | Total |
|---|---|---|---|
| $150,000 | $1,650 | $750 | $2,400 |
| $200,000 | $2,200 | $1,000 | $3,200 |
| $250,000 | $2,750 | $1,250 | $4,000 |
| $300,000 | $3,300 | $1,500 | $4,800 |
| $350,000 | $3,850 | $1,750 | $5,600 |
| $400,000 | $4,400 | $2,000 | $6,400 |
| $450,000 | $4,950 | $2,250 | $7,200 |
| $500,000 | $5,500 | $2,500 | $8,000 |
| $600,000 | $6,735 | $3,000 | $9,735 |
| $700,000 | $8,015 | $3,500 | $11,515 |
| $800,000 | $9,295 | $4,000 | $13,295 |
| $1,000,000 | $11,855 | $5,000 | $16,855 |
Transfer tax calculator
Who pays
Seller. 0.50% local REET added to the graduated state rate on the ENTIRE sale price (not marginal against the state tiers), applies in every King County city including Seattle.
Frequently asked questions
How much is the transfer tax in King County (all cities, including Seattle)?
King County (all cities, including Seattle) charges 0.5% of the purchase price, on top of the Washington state tax, so a $644,300 home pays $10,524 in total ($7,302 state, $3,222 local).
Who pays the King County (all cities, including Seattle) transfer tax?
Seller. 0.50% local REET added to the graduated state rate on the ENTIRE sale price (not marginal against the state tiers), applies in every King County city including Seattle.
Sources
- Washington Department of Revenue, Real Estate Excise Tax (REET), graduated state rates
- Who pays
- Washington Department of Revenue, Local REET rates effective May 1, 2026
Rates as the statute or revenue department publishes them, checked 2026-09-22. Figures are computed from those rates and rounded to the dollar; exemptions for first-time buyers or principal residences are noted where they exist and are not applied. All sources.
Washington transfer tax overview → All Washington buyer closing costs →
Figures are computed from the statutes and ordinances cited above and rounded to the dollar. This is general information, not tax or legal advice.
Washington transfer tax