Second half of 2019 property taxes due October 31

Tuesday, October 15, 2019

Property owners in King County have until Thursday, October 31 to pay the second half of their 2019 property taxes if those taxes are not included in a mortgage payment. 

After that date, interest charges and penalties will be added to the tax bill.

To make the process easier, King County provides several ways for property owners to pay their taxes quickly and conveniently. Payments can be made:
  • Online using King County's convenient, secure online eCommerce system. Taxpayers may pay tax accounts with a credit card, debit card, or an electronic check.
  • By mail if postmarked no later than October 31, 2019. Taxpayers should write their property tax account number on their check or money order. Cash should not be sent through the mail. Taxpayers do not need to include a tax statement with the payment as long as the tax account number is on the check or money order and payment is for the exact amount due.
  • At King County Community Service Centers if paid by check for the exact amount due. Taxpayers can find the address, phone number, and operating hours of the center in their area by visiting
  • In person at Treasury Operations, sixth floor of the King County Administration Building, 500 Fourth Ave. in Seattle. Hours are Monday through Friday, 8:30 a.m. to 4:30 p.m. On Thursday, October 31, Treasury Operations will be open until 5 p.m.

The online option provides immediate payment confirmation for current year or delinquent year(s) property tax bills. Pay online or view property tax information here. Get answers to questions about missing tax statements or other tax payment information, here , contact King County Treasury Operations by email, or contact a customer service specialist at 206-263-2890.

Information on senior citizen exemption and deferral programs can be obtained from the King County Assessor's Office by email or 206-296-3920.


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