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First half 2018 property tax payments that were not PAID or POSTMARKED by April 30 2018 are now delinquent and must include statutory late charges.  Washington State Law does not allow any exceptions (RCW 84.56.020)

To review current amounts due and avoid further charges, pay taxes online using the safe and secure eCommerce system.

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

I know my parcel/account number

I do NOT know my parcel/account number

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're 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.

Property Tax 206-263-2890
Tax Foreclosure 206-263-2649
Personal Property Tax 206-263-2844

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