Home and mortgage
King County, WA Property Tax Calculator
King County homeowners pay a median $7,114 a year in property tax, 0.83% of a median $859,900 home: above Washington's 0.81% but below the national 0.94%.
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Property tax in King County by home value, at 0.83%
| Home value | A year | A month |
|---|---|---|
| $430,000 | $3,556 | $296 |
| $640,000 | $5,293 | $441 |
| $860,000 | $7,112 | $593 |
| $1,290,000 | $10,668 | $889 |
| $1,720,000 | $14,224 | $1,185 |
King County against Washington and the US
| Effective rate | Median tax | Median home value | Median household income | |
|---|---|---|---|---|
| King County | 0.83% | $7,114 | $859,900 | $124,746 |
| Washington | 0.81% | $4,556 | $564,600 | $98,141 |
| United States | 0.94% | $3,119 | $332,700 | $80,734 |
How this calculator works
Median real estate taxes paid ÷ median home value in King County, from the Census Bureau's American Community Survey 2020–2024 5-year estimates. The calculator starts at the county's median home value and rate.
Questions people ask
What is the property tax rate in King County?
The effective rate is 0.83%: a median $7,114 a year on a median $859,900 home. That's the 5th highest of the 21 Washington counties we cover.
How much is property tax on a $400,000 house in King County?
About $3,308 a year, $276 a month, at the county's effective rate, before any exemption.
How does King County compare with the rest of Washington?
Its rate is above the state's 0.81%. Across Washington, covered counties range from 0.67% to 0.91%.
How do I lower my King County property tax?
Apply for every exemption you qualify for, such as a homestead exemption, and appeal your assessment if it is higher than comparable homes sold nearby; the county assessor explains the deadlines.
Other Washington counties
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Sources
Updated by the RateHerald team. The maths is tested against worked examples; report a problem.