This Washington property tax estimator turns your home value into an annual and monthly property tax bill using Washington’s 0.98% average effective tax rate — the typical ratio of tax paid to home value across the state. Enter your assessed or market value and an optional homestead exemption to see what you would owe.
How it works
Washington’s effective property tax rate is about 0.98%. The effective rate is a statewide average — the total property tax actually paid divided by total home value — which folds together the many local mill rates set by counties, cities and school districts into one comparable number.
The estimate is straightforward:
taxable value = home value − homestead exemption
annual tax = taxable value × 0.0098
monthly tax = annual tax ÷ 12If you do not enter an exemption, the full home value is taxed.
Example
Take a $350,000 home in Washington with no homestead exemption. At the 0.98% effective rate the annual tax is $350,000 × 0.0098 = $3,430, which is about $286 per month. Applying a homestead exemption lowers the taxable value first, so a $25,000 exemption would drop the taxable base to $325,000 and the annual tax to about $3,185.
Notes
This is an estimate only and not tax advice. Washington property tax is ultimately set by local mill or millage rates that vary by jurisdiction, so your actual bill may be higher or lower than this statewide-average figure. Confirm the exact rate and any exemptions with your county assessor or your state revenue department before relying on the number.