Washington property tax at the effective rate real bills actually land at — 0.81% of value at the ACS 2025 medians — applied to your home’s value. Pilot counties included: King.
$304 a month
| Assessed value | $450,000 |
| Homestead exemption | $0 |
| Effective rate | 0.81% |
| Annual tax | $3,645 |
Washington's median homeowner pays $4,911 on a $605,600 home — 0.81% effective (ACS 2025). Nominal rates mislead across states (assessment ratios differ); the effective rate is the honest comparator. Your parcel's bill follows its own assessment and the overlapping local levies.
Source: U.S. Census Bureau, ACS 2025 1-year estimates.
1% levy limit (RCW 84.55 / Initiative 747): each taxing district's regular levy revenue may grow at most 1%/yr plus new construction, absent a voter-approved lid lift - a revenue limit per district, NOT a cap on an individual home's bill or assessed value.
Source: state source in the research file (see hub).
This family is the pilot the plan called for: all 51 state pages plus the 25 most populous counties — not thousands of county pages with rates nobody verified. County figures here are the same ACS medians at county level.
County assessors publish parcel-level figures.
Assessments lag markets, exemptions differ (senior, veteran, disability), and local levies stack differently street by street. The effective-rate model gives the typical bill for the value, not your parcel's bill.
By effective rate, Illinois (1.92%) and New Jersey (1.82%); by median dollars, high-value states like New Jersey ($9,648) and California ($5,537) — the hub table shows both lenses.
Washington Property Tax Calculator for 2026: at Washington's 0.81% effective rate (ACS 2025), a $450,000 home pays about $3,645 a year. The state median bill is $4,911.
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What property tax typically costs in Washington: the ACS 2025 effective rate applied to your home.
Washington’s effective rate is 0.81%; the median bill is $4,911.
On the $450,000 test home the model gives $3,645 a year.
Typically $4,911 a year at the median (0.81% effective).
No — an effective-rate estimate; assessments and exemptions move real bills.
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