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Many King County facilities are closed to the public. Learn how to access services remotely or while following social distancing guidelines.  
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Error on Postcard

Did you receive a postcard reminder of unpaid 2020 property taxes? Some postcards have the incorrect parcel number printed. Before making your payment, please check that your name and address match with the account shown online. If you see an error, please use the eReal Property Search button below, email Treasury at, or call 206-263-2890 to speak with a customer service representative.

COVID-19 (coronavirus) Service Changes

To help slow the spread of coronavirus (COVID-19), King County Treasury customer service operations are being provided remotely until further notice.

Taxpayers can still receive services via

  • Email:
  • Phone: Real Property Tax (Real Estate) 206-263-2890
  • Phone: Mobile Homes and Personal Property Commercial Property Tax 206-263-2844
  • Mail: King County Treasury Operations, 500 Fourth Ave., Ste. 600, Seattle, WA 98104

I know my parcel/account number

I do NOT know my parcel/account number

Need help? Check our Frequently Asked Questions (FAQ), call 206-263-2890, or email


Many changes have been made to the property tax exemption and deferral programs for seniors, people with disabilities, and military veterans with a service-connected disability. Instead of a fixed amount, the annual income limit is now indexed at 65% of the median household income in King County, which for 2019 was $58,423. These changes take effect for property taxes collected in 2020. Please visit the Assessor's Office website for detailed eligibility information and how to apply.

Be aware that the accuracy of the information you are accessing may be affected by pending payments or other changes. Therefore, King County Treasury Operations cannot warrant the accuracy, reliability, or timeliness of this information, and shall not be held liable for losses caused by using this information. Any person or entity that relies on any information obtained from this system does so at their own risk.

Sign up for a property tax reminder

Get an email or text message reminder roughly 30 days before the property tax payment deadlines of April 30 and October 31.

Manage your account, or unsubscribe from text or email alerts.

This service is only a reminder of King County property tax payment deadlines. If the message doesn't reach you for any reason, you are still required to pay your property taxes on time. Fees will be added to late property tax payments. King County is not at fault for late payments, even if this notice fails to send, or is never received.

King County Treasury Operations will only use the email address or cell phone number you provide to send you property tax deadline reminders. The King County Privacy Policy explains how we handle the information you give us.

King County Treasury Operations, 500 Fourth Ave., Suite 600 Seattle, WA 98104

Property Tax Information and Customer Service-------------------- 206-263-2890 ----
Mobile Homes/Commercial Personal Property---------------------- 206-263-2844 ----
Tax Foreclosures --------------------------------------------------------------- 206-263-2649 ----
Maintenance Assessment Mgmt Systems/Local Improvement Districts  206-263-1893