The Seattle property tax rate is not a single number. It is expressed in dollars per $1,000 of assessed value, and the total you pay depends on your exact address because different taxing districts overlap different neighborhoods. King County levy codes covering Seattle have historically landed somewhere between roughly $8 and over $10 per $1,000, and the specific rate shifts every year with voter-approved measures, assessed value changes, and state growth limits.1King County. Levy Rate Reports On a home assessed near Seattle’s typical value of $850,000, that range translates into thousands of dollars of annual difference, so pulling your actual levy code from the King County Assessor matters more than relying on a citywide average.
How to Calculate What You Owe
Washington assesses property at 100% of fair market value, with no assessment ratio applied.2Washington State Legislature. RCW 84.40.030 – Manner of Assessment That means the assessed value on your bill should track closely with what your home would actually sell for. If it does not, that gap is worth investigating.
The formula is simple:
(Assessed Value ÷ 1,000) × Levy Rate = Annual Tax
Take a home assessed at $850,000 in a levy code with a $9.50 rate. Divide $850,000 by 1,000 to get 850, then multiply by $9.50. The annual tax comes to $8,075. Your own numbers will differ; the levy rate reports published by the King County Assessor show the exact figure for each code within the city.1King County. Levy Rate Reports
Why the Rate Varies Across Seattle
Your total rate is a stack of individual levies from every taxing district that touches your property. The State of Washington, King County, the City of Seattle, your local school district, the Port of Seattle, fire districts, library districts, and any voter-approved special levies each set their own portion. The Assessor combines them into the single total that appears on your bill.3Washington State Department of Revenue. Homeowners Guide to Property Tax
Because different parts of the city sit inside different combinations of these districts, two houses a few blocks apart can carry slightly different totals. Levies also split into two types. Statutory levies fund ongoing operations under standing state law. Voter-approved levies are time-limited additions Seattle residents authorized at the ballot for schools, libraries, parks, housing, or transit. When those measures expire, that portion of the rate drops, though replacement measures are common.
The 1% Levy Limit and Your Bill
State law caps how fast any single taxing district can grow its total collection. Under RCW 84.55, each district’s total levy can rise no more than 1% per year, plus revenue from new construction, unless voters approve more.4Washington State Legislature. Chapter 84.55 RCW – Limitations Upon Regular Property Taxes This is often called the 1% levy lid.
The cap applies to the district’s total revenue, not to your individual bill. If your home’s assessed value rose faster than the district-wide average, your share of the total grows and your bill can jump well above 1%, even though the district only collected 1% more overall.5Washington Department of Revenue. Property Tax – How the 1% Property Tax Levy Limit Works The reverse also happens: if values in your neighborhood stayed flat while values elsewhere climbed, your bill can drop.
Where Your Tax Dollars Go
Public schools take the biggest slice of a typical Seattle bill. The state collects a dedicated school levy, and the local school district layers its own voter-approved levies on top. Together, education often accounts for more than a third of the total. King County government takes the next-largest share for criminal justice, public health, and roads. The City of Seattle collects its portion for police, fire, parks, and city infrastructure. Smaller amounts flow to the Port of Seattle, library and hospital districts, flood control zones, and other special-purpose districts.
Some commercial parcels also carry a Business Improvement Area assessment. BIAs are mandatory charges on properties inside a designated commercial district and fund supplemental services like sidewalk cleaning, safety patrols, and marketing. The city collects them on behalf of the local BIA board, separate from your standard levies.6City of Seattle. Business Improvement Areas If you own property in downtown, Pioneer Square, or the University District, check whether a BIA applies.
Exemptions That Lower Your Effective Rate
Seniors and Disabled Persons
Homeowners who are 61 or older, or retired due to disability, may qualify for a property tax exemption that meaningfully reduces the bill.7Washington State Legislature. RCW 84.36.381 – Residences of Senior Citizens and Persons With Disabilities For taxes payable in 2026, King County sets the income limit at $84,000 in combined disposable income, including Social Security.8King County. Senior or Disabled Exemptions and Deferrals The threshold is recalculated each year based on 70% of the county’s median household income.
How much you save depends on your income tier. At the lowest tier, you are exempt from regular property taxes on the greater of $60,000 or 60% of assessed value. At a middle tier, the exemption covers the greater of $50,000 or 35% of assessed value, capped at $70,000. At the highest qualifying tier, you are exempt only from voter-approved excess levies and part of the state school levy.7Washington State Legislature. RCW 84.36.381 – Residences of Senior Citizens and Persons With Disabilities Applications go through the Assessor’s office, and you must requalify if your income changes.
Disabled Veterans
Veterans receiving VA disability compensation at a combined rating of 40% or higher, or with a total disability rating regardless of percentage, qualify under the same program.7Washington State Legislature. RCW 84.36.381 – Residences of Senior Citizens and Persons With Disabilities There is no age requirement; the disability rating alone establishes eligibility, and the reduction follows the same income-based tiers.
Home Improvement Exemption
Remodels or additions worth up to 30% of the original structure’s assessed value are exempt from property taxes for the three assessment years after completion.9Washington State Legislature. RCW 84.36.400 – Improvements to Single-Family Dwellings If your home’s building value is $500,000, you can add up to $150,000 of improvements without those improvements raising your tax bill for three years. Accessory dwelling units qualify, whether attached or detached. File a notice of intent with the Assessor before construction begins. You can claim the exemption once every five years.
Appealing Your Assessed Value
The levy rate is set by law and ballot measures, so the piece of your bill you can actually challenge is the assessed value. If comparable homes sold for less, or the Assessor has not accounted for your property’s condition, you can appeal to the King County Board of Appeals and Equalization. The deadline is July 1 of the assessment year, or within 60 days of the date printed on your value change notice, whichever is later.10King County. How to Appeal a Property Tax Assessment
A strong case rests on recent sale prices of similar nearby homes, documentation of physical deficiencies the Assessor may have missed (foundation issues, outdated systems, needed repairs), and dated photos. File a petition online or in person, then present your evidence at a scheduled hearing. A professional appraisal can strengthen your position, though residential appraisals typically run $500 to $1,000, so weigh the cost against potential tax savings. If the board rules against you, you can escalate to the Washington State Board of Tax Appeals.
Keep in mind that assessed values in King County are set at 100% of fair market value, so fair market value is the standard you have to challenge.2Washington State Legislature. RCW 84.40.030 – Manner of Assessment Arguing that your taxes feel too high is not the same as arguing that the valuation is wrong. The board can only adjust the value, not the rate.
Deadlines and the Cost of Paying Late
King County Treasury collects Seattle property taxes in two installments. The first half is due April 30, the second half October 31.11Washington State Department of Revenue. Property Tax Calendar Due Dates If your annual total is under $50, the full amount is due April 30. When a deadline falls on a weekend, it shifts to the following Monday.
Miss a deadline and interest starts immediately. Residential property with four or fewer units accrues interest at 9% per year on delinquent taxes.12Washington Department of Revenue. Legislative Changes to Delinquent Property Taxes Commercial property, multi-unit residential buildings with more than four units, and personal property face 12% interest plus flat penalties of 3% on June 1 and an additional 8% on December 1.11Washington State Department of Revenue. Property Tax Calendar Due Dates Interest is not prorated, so paying on the second day of a month costs the same as paying on the last. After three years of delinquency, the treasurer must begin foreclosure by issuing a certificate of delinquency and filing a lawsuit to sell the property at public auction.13Washington State Legislature. Chapter 84.64 RCW – Lien Foreclosure