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First half Real and Personal Property taxes that were not paid or postmarked by April 30, 2019 are delinquent and must include late charges.  

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

Payment deadline for second half is October 31, 2019

What is Real Property and what is Personal Property?

  • Real Property is residential property, vacant land or commercial zoned land with a structure.
  • Personal Property are assets used in conducting a business.
  • Mobile and Floating Homes are assessed as Personal property if not associated with Real property accounts.

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 Information and Customer Service

Mobile Homes/Commercial Personal Property

Tax Foreclosures

Maintenance Assessment Management Systems
Local Improvement Districts

TTY Relay 711