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Treasury Operations

Treasury Operations

King County Treasury Operations provides services to King County, cities and special districts in the county, and most importantly, our residents.

The property tax team handles billing, collecting, distributing, and reporting of real and personal property taxes, gambling taxes, and local improvement district assessments.

In 2021, Treasury Operations will have billed, collected, and distributed nearly $6.3 billion in property taxes and $339 million in other assessments and fees to support the County's programs and services.

Real property with at least one year’s tax that is three years past due is subject to foreclosure.  In 2024, would include accounts on which the 2021 (full or part year) is delinquent.   Parcels that are in foreclosure currently are delinquent for 2020 or prior years.

To purchase a property from tax foreclosure, a buyer must participate in the annual online auctions, make the final bid, and make full payment immediately (as per the Terms of Sale).  All sales are final.

The Investment Pool performs accounting and cash management for all revenue funds and deposits for King County, cities, and special taxing districts. It also invests funds for King County and junior taxing districts, following best policies and procedures to maximize return and minimize risk for public funds, and ensures appropriate liquidity for all funds.

The investment pool balance peaked at $10.4 billion and averaged $8.3 billion in 2021.

Debt Management

The Debt Management section issues and administers short and long term King County debt, including such instruments as General Obligation bonds, Lease Revenue bonds, and Sewer Revenue bonds.

Proceeds support such capital activities as Harborview Medical Center, County office space, upgrading King County's technology infrastructure, solid waste, public transportation, water quality, and open space acquisitions.

Municipal Advisor Rule

SEC Rule 15Ba1-1(d)(3)(vi)(B) creates a fiduciary duty upon municipal advisors who provide advice to municipal entities within the scope of the rule.

  • King County uses an Independent Registered Municipal Advisor (IRMA) for its debt management programs in accordance with the exceptions to the SEC Municipal Advisor Rule.
  • King County's investment team manages an approved list of broker/dealers. Refer to the mini Request For Proposal (RFP) in accordance with the exceptions to the SEC Municipal Advisor Rule.

Property Tax Information and Customer Service

Mobile Homes/Commercial Personal Property

Tax Foreclosures

Maintenance Assessment Management Systems
Local Improvement Districts

TTY Relay 711