Seattle property tax is one of the most important costs to understand before buying a home in the Emerald City.
It affects your monthly budget, your long-term financing plan, and how much home you can realistically afford. Yet many buyers focus almost entirely on mortgage rates and down payments, and get caught off guard by the tax bill that follows.
Seattle sits in King County, one of the highest property tax markets in the country. The average property tax bill across the Seattle metro area in 2024 was $7,508 — 80% above the national average, according to ATTOM data. That figure has climbed 57% since 2016.
The good news is that the Seattle property tax is a predictable expense. Once you understand how rates are set, how your bill is calculated, and what relief programs are available, it becomes a manageable part of your overall housing budget.
This guide covers current Seattle property tax rates, how assessed value works, available exemptions, payment deadlines, and how to appeal if your assessment is too high.
What Is Seattle Property Tax and How Is It Calculated?
Seattle property tax is based on two factors: the assessed value of your property and the levy rate applied to it. The King County Assessor's Office determines your property's assessed value each year. Under Washington state property tax law, general non-voter-approved tax increases are capped at 1% annually.
Assessed Value vs. Market Value
Assessed value and market value are not the same number. Market value is what a buyer would pay for your home today. Assessed value is the figure the King County Assessor's Office assigns to your property for tax purposes, based on comparable sales data, property size, age, condition, and location.
The assessed value on your tax bill reflects your property's estimated worth as of January 1 of the prior year. This means your 2026 tax bill is based on your home's value as of January 1, 2025, not what you paid for it. Physical inspections happen at least once every five to six years. Annual revaluations use market data to keep assessments current between those inspections.
Overassessment does occur. If your assessed value is higher than what comparable homes are actually selling for, you have grounds to challenge it through a formal property tax appeal.
How The Levy Rate Is Determined
The levy rate is not a single fixed number. It is the combined total of every taxing jurisdiction that applies to your specific property. Your parcel number determines exactly which jurisdictions apply to you.
A home in Seattle carries different overlapping levies than a comparable home in Bellevue or Redmond, which is why there is no single "King County tax rate" that applies to everyone.
Under Washington state property tax law, general taxes cannot increase more than 1% per year without voter approval. However, voters can approve a lid lift, a temporary or permanent measure that raises the levy above the standard cap for a specific purpose.
In 2025, Seattle voters approved an 8-year lid lift for transportation, which is one reason Seattle was among only two cities in King County to see a levy rate increase that year. The taxing jurisdictions that make up your total levy rate typically include:
State levy
Washington State applies a uniform levy across all counties to fund basic education. This portion of your bill is set at the state level and applies regardless of which city you live in.
King County levy
This funds county-wide services including the court system, public health, and regional infrastructure. King County's portion of the levy is separate from city-specific charges.
City of Seattle levy
The city applies its own levy to fund local services. Seattle's levy rate increased in 2025, one of only two cities in King County to see a rise that year.
School district levy
A significant share of your Seattle property tax bill goes to your local school district. Voter-approved school bonds and levies can add to this portion above the standard cap.
Fire district levy
This funds your local fire protection services. Rates vary depending on which fire district covers your property.
Emergency Medical Services (EMS) levy
This dedicated levy funds emergency medical response across King County. It is a separate line item on your tax bill.
Seattle Park District levy
The Seattle Park District is a permanent taxing district, established by voters in 2014, with rates set annually by the Park District Board.
How Seattle Compares to State and National Averages
Understanding where Seattle sits relative to other markets helps homeowners assess whether their bill is in line with what the market supports.
The effective tax rate of 0.98% is higher than the Washington state median of 0.92%. The Seattle metro area ranked 10th highest among 216 U.S. metros for property taxes in 2024. The average Seattle property tax bill in 2024 was $7,508, 80% above the national average. Seattle property tax bills have climbed 57% since 2016.
What a Median-Priced Home Costs in Taxes
The median home value Seattle sits at approximately $872,000. At the current effective tax rate, that translates to roughly $760 per month when broken into monthly figures. Taxes scale directly with assessed value, higher-value homes pay more in dollar terms even when the rate stays the same. Lenders factor this monthly tax cost into your escrow impound account, collecting it alongside your mortgage payment to ensure the bill is covered when it comes due.
What Does Your Seattle Property Tax Bill Pay For?
King County property tax revenue funds a broad range of public services across the region. The county publishes a detailed breakdown of how funds are allocated each year on its official website.
Understanding where your money goes puts the cost in perspective, these are services that directly affect the quality of life for every Seattle resident. The full range of services funded includes:
Local schools and early childhood education
A substantial share of your Seattle property tax bill goes directly to local schools. Early learning programs receive dedicated funding through voter-approved levies that run alongside the standard school district levy.
Secondary and post-secondary education
King County supports secondary schools and contributes to post-secondary education programs. Voter-approved school bonds are a common mechanism for funding capital improvements at the district level.
Public welfare and homelessness response
A portion of King County property tax revenue funds public welfare programs. This includes services aimed at addressing Seattle's ongoing homelessness crisis through housing support and outreach programs.
Public transportation
King County Metro bus services and the regional Light Rail network both receive property tax funding. The 2025 transportation lid lift approved by Seattle voters will direct $1.5 billion over eight years toward a host of transit and infrastructure projects.
Hospital and health resources
Public health programs, regional hospital systems, and behavioral health crisis care centers receive property tax funding. King County voters approved a 9-year lid lift in 2024 to fund a regional network of behavioral health crisis centers.
Police, fire, and public utilities
Emergency services, law enforcement, and essential public utilities are funded through the combined levies that make up your total levy rate. These services represent a core share of what the county and city collect each year.
Seattle Park District levy
Parks, pools, community centers, and recreation programs across Seattle are maintained through this dedicated levy. It was established by voters in 2014 and applies to all properties within Seattle city limits.
Seattle Property Tax Exemptions You May Qualify For
Several property tax exemption programs exist to reduce the burden on eligible homeowners. The King County Assessor's Office administers these programs directly. Tax relief programs cover seniors, disabled veterans, and homeowners with service-connected disabilities.
Who Qualifies for a Property Tax Exemption
Eligibility is based on age, disability status, income, and primary residency. Many homeowners who assume they don't qualify actually do, particularly after factoring in allowable medical expense deductions that can bring household income below the threshold.
The senior exemption applies to homeowners aged 61 or older as of December 31 of the application year, with combined household income below $84,000.
Income limits are subject to change; verify current figures with the King County Assessor's Office before applying. Disabled veterans with an 80% or greater service-connected disability rating may qualify regardless of age. Both programs freeze the assessed value used for tax calculation, reducing the bill by 30% to 90% depending on income tier.
A separate deferral program is available for homeowners with combined disposable income up to $57,000, allowing them to delay the second-half payment rather than receive an outright reduction.
How to Apply Through the King County Assessor's Office
Applications go directly to the King County Assessor's Office. Required documents include proof of age or disability, proof of income, and property ownership details tied to your parcel number. Once approved, the exemption applies to your account for the current year and carries forward into future years. Apply early — deadlines are tied to the annual assessment cycle and missing them means waiting another full year.
How to Budget and Manage Your Seattle Property Tax
Seattle property tax is a predictable expense. Because it follows a fixed two-installment schedule each year, you can plan for it well in advance.
Breaking your expected annual bill into monthly figures makes it easier to assess what you can afford before you buy, and to set aside the right amount if your lender collects taxes through an escrow impound account.
Property Tax Due Dates and Payment Schedule
King County property tax follows a two-installment payment schedule. The first half is due by April 30, penalties apply from May 1. The second half is due by October 31 penalties apply from November 1. Delinquent taxes from prior years must be paid separately and cleared before the current balance.
Most lenders collect property taxes monthly through an escrow impound account as part of your regular mortgage payment, removing the risk of missing a deadline.
How to Appeal Your Property Tax Assessment in King County
Homeowners who believe their property has been subject to overassessment can file a property tax appeal with the Board of Equalization (BOE). The filing deadline is July 1 of the assessment year or within 60 days of receiving your valuation notice, whichever is later.
Evidence must include actual closed comparable sales from your area. Automated estimates like Zestimates are not accepted by the BOE. Hearings typically run 15–30 minutes and can be attended in person at the King County Administration Building in Seattle or by phone.
If the BOE decision does not resolve the issue, homeowners can escalate to the Washington State Board of Tax Appeals within 30 days of receiving the written decision.
Plan Your Home Purchase With the Full Cost in Mind
Seattle property tax is a significant line item in any homeowner's budget. Knowing the rates, exemptions, and payment schedule puts you in a much stronger position when planning your finances.
At Seattle's Mortgage Broker, we factor the true cost of taxes into your monthly budget analysis from the very first conversation.
Property taxes, insurance, and escrow are part of how we structure a financing plan that works for your life in Seattle. Our goal is to make sure you walk into your purchase with a clear picture of what you owe, when you owe it, and how to keep more of your money over time.
If you're ready to plan your home purchase with the full cost in mind, contact Seattle's Mortgage Broker to get started.
Frequently Asked Questions
What Is the Property Tax Rate in Seattle?
The effective tax rate in King County is approximately 0.98% for 2025. The exact rate varies by taxing jurisdiction based on your parcel number.
How Are Seattle Property Taxes Calculated?
Seattle property tax is your property's assessed value multiplied by the combined levy rate from all applicable taxing jurisdictions.
When Are Seattle Property Taxes Due?
The first half is due April 30. The second half is due October 31. Penalties begin May 1 and November 1 respectively.
Why Did My Taxes Go Up Even Though My Home Value Went Down?
Tax bills are driven by the total levy amount needed — not individual home values. In 2024, Seattle's median home value fell $62,000 while the median tax bill increased by $247.
How Do I Appeal My Property Tax Assessment?
File with the Board of Equalization (BOE) by July 1. Bring closed comparable sales as evidence. Hearings run 15–30 minutes in person or by phone.
