Property Tax
King County property taxes support many public programs and services while providing property owners with several ways to review their accounts, make payments, and find assistance. This article explains how King County WA property tax works, where to access official property tax systems, how to identify your account information, payment options, property tax categories, relief programs, payment plans, and the offices responsible for property tax services.
Property Tax Services Overview
King County Treasury Operations manages property tax billing and collection services for property owners. The county provides online tools, payment options, account information, and customer support to help taxpayers handle their property tax responsibilities. The official Property Tax page from King County Treasury Operations provides access to payment information, account services, and other property tax resources.
Property taxes are collected for properties throughout King County and help fund programs and services provided by local governments. Property owners can access their tax information, make payments, and review available options through county-operated systems.
Types of Property Taxes
King County taxes two main categories of property: real property and personal property. Knowing the difference can help property owners use the correct account information and contact the appropriate county office.
Real Property Taxes
Real property includes land and buildings or structures located on that land. Examples include homes, commercial buildings, and other permanent structures. Real property tax accounts use account numbers that are generally 10 or 12 digits.
Residential property taxes are based on the assessed value of the property and other factors established through state and local government requirements. The assessed value does not create a dollar-for-dollar change in the amount of property taxes owed. The county explains that tax calculations involve the assessed value, total taxable property value in the community, voter-approved measures, and local government budgets.
Property owners who want to review property information can use the King County Department of Assessments eReal Property search to look up property details using available property information.
Personal Property Taxes
Personal property taxes apply to certain assets used in business activities. This category can include furniture, fixtures, machinery, equipment, supplies, and materials not held for sale. Floating homes and mobile homes in certain situations may also be taxed as personal property.
Personal property tax accounts generally use eight-digit account numbers. Property owners with questions about mobile home, personal property, or commercial property taxes should use the contact information provided by King County Treasury Operations.
Finding Tax Account Information
Property owners need the correct parcel number or tax account number to access payment information and complete many property tax transactions. The account number may appear on a tax statement or property value notice.
If a property owner does not know the parcel or account number, King County provides a search option through the eReal Property system. Users can search property information by entering an address to locate parcel details.
The county’s online payment system also provides an account search option. Property owners should avoid including dashes when entering a tax account or parcel number into the payment system.
Property Tax Payment Options
King County provides multiple ways to pay property taxes, including online payments, mailed payments, in-person payments, and secure drop box payments. Property owners should make sure payments include the correct account information to avoid processing issues.
Online Tax Payments
The county’s secure online payment system allows property owners to pay using a credit card, debit card, or electronic check. A service fee applies when using online payment options.
To make an online payment, property owners need their tax account or parcel number. The account number can be found on a tax statement or property value notice, or located through the county’s property search system.
The online payment system is available through the official King County property tax payment portal.
Payments By Mail
Property owners may mail payments using a check, cashier’s check, or money order. Payments must be postmarked no later than the statutory due date.
Payments mailed to King County Treasury should include the property tax account number on the check or money order. A tax statement does not need to be included when the payment is for the exact amount due and the account number is provided.
Cash should not be mailed for property tax payments.
In-Person Payments
Property owners can make payments in person at the King County Customer Service Center. Accepted payment methods include check, money order, credit card, debit card, and cash. Card payments include a service fee.
The Customer Service Center is open Monday through Friday from 8:30 a.m. to 4:30 p.m. and is closed on King County holidays.
Secure Drop Box Payments
King County provides a secure drop box location for property tax payments. Payments deposited in the drop box must be made by check or money order. Cash payments should not be placed in the drop box.
The secure drop box is available Monday through Friday from 8:30 a.m. to 4:30 p.m.
Property Tax Deadlines
Property owners are responsible for paying property taxes by the required deadlines. King County provides reminder services that allow taxpayers to receive email or text message reminders before property tax payment deadlines.
The reminder service is only a notification tool. Property owners remain responsible for paying taxes on time even if a reminder message is not received. Late charges may apply to late property tax payments.
Tax Statements and Account Questions
King County provides answers to common questions about tax statements, payments, account balances, assessments, exemptions, and other property tax topics through the Property Tax Frequently Asked Questions page.
Property owners may have questions about receiving tax statements, mortgage lender payments, payment posting, refunds for overpayments, changing the name or address on a tax statement, or finding parcel and account numbers.
The accuracy of online property tax information may be affected by pending payments or other account changes. King County advises users that information accessed through county systems should be reviewed with those limitations in mind.
Property Tax Relief Programs
Some property owners may qualify for property tax relief programs administered through the King County Department of Assessments. These programs include options related to seniors, people with disabilities, military veterans with service-connected disabilities, limited-income property owners, and certain property damage situations.
Eligibility requirements and application procedures are provided through the county’s property tax relief information. Property owners should review the requirements for each program before applying.
Payment Plans For Delinquent Taxes
King County offers a property tax payment plan program for certain taxpayers experiencing economic hardship. Payment plans are available for delinquent prior-year taxes for eligible real property homes, commercial businesses, land, and mobile homes.
To participate, property owners must sign agreements with King County Treasury and the payment plan administrator. Plans are calculated using taxes, interest, and statutory penalties through the end of the plan and are divided into monthly payments for six or 12 months.
Payment plans do not remove applicable late charges or interest required under state law. Property owners should review the payment plan terms before entering an agreement.
Payment Plan Requirements
Property owners interested in a payment plan should provide their contact information, tax account number, the tax year requiring the plan, and the desired plan length. Payment plan agreements must be completed before monthly payments begin.
Monthly payments for approved plans must be sent to the payment plan administrator rather than King County Treasury. Property owners with mortgages should notify their lender about an established payment plan.
Assessed Property Values
The King County Department of Assessments determines property values used for taxation. Residential property is assessed each year at market value, which the county defines as the amount a willing buyer would pay to a willing seller.
Residential property assessments generally use methods such as comparing similar property sales and estimating replacement costs while accounting for depreciation and land value.
Property owners who disagree with an assessed value can access county information about property assessments and appeals through official county property assessment services.
Common Payment Mistakes
Property owners can avoid many payment problems by checking account details before submitting a payment and using the correct payment method for their situation.
Include the correct tax account number when mailing payments.
Do not send cash through the mail.
Do not place cash payments in the secure drop box.
Confirm whether the payment is for real property or personal property before using account information.
Remember that online card payments include service fees.
Keep payment records and verify account information when needed.
Relevant Property Tax Offices
King County Treasury Operations
201 S. Jackson St.
Seattle, WA 98104
206-263-2890
King County Department of Assessments
201 South Jackson Street
Seattle, WA 98104
206-296-7300
Property Tax FAQs
How can I find my King County property tax account number?
If you need your tax account or parcel number before making a payment, check your tax statement or property value notice. You can also use the King County Department of Assessments eReal Property search to look up parcel information by entering available property details. When using the online payment system, enter the account or parcel number without dashes.
What should I do if I cannot pay my property taxes on time?
Property owners who are unable to pay certain delinquent prior-year real property taxes may be able to apply for a payment plan through King County Treasury. Eligible plans can include real property homes, commercial businesses, land, and mobile homes. Approved agreements divide the amount due into monthly payments for six or 12 months, while applicable interest and penalties required by law may still apply. Review the King County property tax payment plans information for requirements and application details.
Where can I check property tax payment status or account details?
King County provides online access for reviewing property tax information and making payments. Property owners can use the official payment system to search accounts, view payment options, and complete eligible transactions. The county notes that online information may change when payments are pending or account updates are being processed.
Can I apply for property tax relief programs in King County?
Some property owners may qualify for tax relief programs based on eligibility requirements. King County provides information about programs for seniors, people with disabilities, disabled veterans with service-connected disabilities, limited-income property owners, and certain damaged properties. Visit the King County tax relief information page to review available programs and application requirements.
How do I get answers to common property tax questions?
King County provides answers about tax statements, payment deadlines, refunds, online payments, assessed values, exemptions, and other account-related topics through its property tax frequently asked questions page. This resource can help property owners find guidance for common account and payment issues.