WASHINGTON King Property Tax Estimator
Estimate Your Property Tax
Rate Breakdown
Property taxes in King County are calculated by multiplying the assessed value (minus exemptions) by the total local millage rate.
| Authority | Avg. Rate |
|---|---|
| County General Fund | 0.45% |
| School District (Avg) | 1.20% |
| City / Local (Avg) | 0.35% |
How Property Tax Works in King County
Property taxes in King County are based on the assessed value of your property, which is determined by the King County Assessor’s Office. Assessments are conducted annually, reflecting the market value of your property as of January 1st of the tax year. The assessed value is then multiplied by the tax rate, also known as the millage rate, which is expressed in dollars per $1,000 of assessed value. This rate is set by various taxing districts, including cities, school districts, and county governments, to fund local services like schools, roads, and emergency services.
- Assessed Value: Determined annually by the King County Assessor’s Office.
- Millage Rate: Set by taxing districts and applied to the assessed value.
- Tax Calculation: (Assessed Value / 1,000) × Millage Rate = Property Tax.
Available Exemptions
King County offers several exemptions to reduce property tax burdens for eligible homeowners. These include:
- Homestead Exemption: Provides a reduction in the assessed value for primary residences.
- Senior Citizen & Disabled Persons Exemption: Offers significant tax relief for homeowners aged 61+ or those with disabilities, based on income eligibility.
- Veteran Exemption: Provides tax relief for honorably discharged veterans with a service-connected disability.
To apply for these exemptions, homeowners must submit the appropriate forms to the King County Assessor’s Office and meet specific eligibility criteria.
Payment Schedule & Deadlines
Property taxes in King County are due in two installments each year. The first half is due by April 30th, and the second half is due by October 31st. Payments postmarked after these dates are considered late and incur penalties. Late payments are subject to:
- A 1% interest charge for the first month.
- Additional penalties and interest for each subsequent month.
Homeowners can pay online, by mail, or in person at the King County Treasury Office. Payment plans may be available for those facing financial hardship.
Appealing Your Assessment
If you believe your property has been overvalued by the King County Assessor’s Office, you can appeal the assessment. The appeals process involves the following steps:
- File an appeal within 60 days of the assessment notice date.
- Submit evidence supporting your claim, such as recent comparable sales or appraisals.
- Attend a hearing with the King County Board of Equalization to present your case.
If successful, your property’s assessed value will be adjusted, potentially lowering your property tax bill. For detailed instructions, visit the King County Assessor’s website or contact their office directly.