Due to the financial hardships caused by the COVID-19 pandemic, King County Executive Dow Constantine has extended the first-half 2020 property tax deadline to June 1. This executive order only applies to individual residential and commercial taxpayers who pay property taxes themselves, rather than through their mortgage lender. Banks and other financial institutions that pay property taxes on behalf of their lending customers will still need to meet the original April 30 deadline.

The extension applies to both real property taxes (buildings and structures) and personal property taxes (equipment used in business). For those who can do so, King County is encouraging taxpayers to pay by the regular April 30 deadline or as soon thereafter as possible. The county will not add interest charges to the tax bill for individual taxpayers who pay the first half amount of their 2020 property taxes by June 1.

Payments can be made:

  • Online at kingcounty.gov/PropertyTax using a credit or debit card or by eCheck (a processing fee applies to these options)

  • By mail using a check or money order addressed to Treasury Operations, King County Administration Building, 500 Fourth Ave., Suite 600, Seattle, WA 98104 (cash should not be sent through the mail)

  • Via check or money order using the specially marked secure dropbox at the King County Administration Building in Seattle (cash payments may not be deposited in the dropbox)

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