King County Property Tax Calculator
Locality estimate page for King County, Washington. Use this county/locality rate for faster screening, then confirm parcel-specific details with your local tax authority.
County/Locality Effective Rate
0.83%
State Effective Rate
0.75%
Sample Annual Tax Difference
$340
Median Home Value (ACS)
$859,900
Median Annual Tax Bill (ACS)
$7,114
Owner-Occupied Households
521,805
The typical owner-occupied home in King County is valued at $859,900 with a median real estate tax bill of $7,114 per year — an effective rate of 0.83%. Both figures come from the same ACS release, so the ratio is an estimate rather than an aggregate of individual bills.
State Mortgage Context: Washington
Some counties follow standard FHA limits while higher-cost counties may qualify for elevated FHA limits.
State Effective Tax Rate
0.75%
FHA 1-Unit Floor
$541,287
FHA 1-Unit Ceiling
$1,249,125
In King County, Washington, the current county-level estimate is 0.83%, or approximately $3,320 annually on a $400,000 home.
How to Use This County Estimate
Step 1
Enter your property value and assessment assumptions.
Step 2
Apply exemptions that may reduce taxable value.
Step 3
Compare county/locality estimate against statewide fallback.
King County Property Tax Snapshot
Estimated effective rate: 0.83% · vs Washington: 0.75% · vs national benchmark: 0.90%
| Home value | Estimated annual tax | Estimated monthly tax |
|---|---|---|
| $250,000 | $2,075 | $173 |
| $400,000 | $3,320 | $277 |
| $500,000 | $4,150 | $346 |
| $750,000 | $6,225 | $519 |
| $1,000,000 | $8,300 | $692 |
Compare Nearby Property Taxes
- King County0.83%
- Clark County0.82%
- Cowlitz County0.82%
- Spokane County0.84%
- Skagit County0.79%
- Yakima County0.79%
- Benton County0.78%
Source Transparency
Source: U.S. Census Bureau, ACS 5-Year Estimates (B25103 / B25077)
View sourceLast updated: August 2026
Estimates only. Confirm parcel-specific amounts with the official local taxing authority.
Need Statewide Context?
Visit Washington mortgage snapshot or return to the national calculator hub.