Treasury Operations
King County Treasury Operations manages financial services that support county government, cities, special districts, and residents. This office handles property tax billing and collection, tax foreclosure processes, investment pool activities, special taxes, and other treasury functions. This article explains how Treasury Operations works, which services are available, how residents and businesses can complete common tasks, where to find official systems, and what information may be needed when contacting the office.
Treasury Operations Services
King County Treasury Operations provides financial administration services for public funds and tax programs throughout the county. The office supports residents by managing property tax payments and related services while also serving government agencies, cities, and special districts.
The main areas handled by Treasury Operations include property taxes, tax foreclosures, investment pool management, admissions and parking taxes, gambling taxes, mobile home tax services, and debt management. Each service area has separate procedures and contact methods, so selecting the correct department function can help avoid delays.
Property Tax Services
Property taxes are one of the primary services managed by Treasury Operations. The property tax team handles billing, collecting, distributing, and reporting for real property taxes, personal property taxes, gambling taxes, and local improvement district assessments.
Property taxes help fund programs and services provided to King County residents. Property owners can access official property tax information through the county’s property tax services page, which provides payment options and account information.
Property Tax Payment Options
King County provides several ways for property owners to submit tax payments. Available payment methods include online payment, mail, in-person payment, and secure drop box payment.
Online payments: Property owners can use the secure online payment system to pay by credit card, debit card, or electronic check. A service fee applies when using this option.
Mail payments: Payments may be mailed by check, cashier’s check, or money order. The payment must be postmarked no later than the statutory due date. The property tax account number should be included with the payment.
In-person payments: Payments can be made at the King County Customer Service Center. Accepted payment methods include check, money order, credit card, debit card, and cash. Card payments include a service fee.
Secure drop box payments: A secure drop box is available for check or money order payments. Cash payments should not be placed in the drop box.
When submitting a payment, property owners should verify the property tax account number and payment amount. Including incorrect account information or sending payment through an unsuitable method can create processing problems.
Property Tax Accounts
Property tax services include both real property and personal property accounts. Real property generally includes land and structures located on the land. Personal property includes business assets used for conducting business activities. Mobile homes and floating homes may be taxed as personal property when they are not associated with a real property account.
Property owners may need their parcel number or property tax account number when making payments or requesting account information. The official property tax system provides options for users who know their account information and for users who need to search for their property.
Common Payment Issues
Property tax customers may need assistance with payment records, tax statements, account numbers, or online payment questions. The county provides a property tax FAQ covering common topics, including payment deadlines, tax statements, online payments, account numbers, and other property tax questions.
Customers should remember that property tax information may change because of pending payments or other account updates. Users should verify current information through official county systems before relying on account details.
Tax Foreclosure Process
King County Treasury Operations manages tax foreclosure activities for properties with delinquent taxes, assessments, fees, or liens. A real property tax foreclosure process begins when a tax, assessment, fee, or lien becomes three years delinquent.
Properties involved in tax foreclosure may be offered through an annual auction process. The county provides information about the foreclosure process, auction procedures, and related requirements through its property tax foreclosure information.
Removing Property From Foreclosure
To remove a parcel from a foreclosure action, all required amounts must be paid, including taxes, fees, interest, penalties, and foreclosure costs. Property owners should review their account information and contact Treasury Operations for questions about foreclosure-related payments.
Tax foreclosure sales are separate from mortgage or loan foreclosures. Mortgage-related foreclosure matters are handled by lenders or mortgage servicers rather than the county tax foreclosure process.
Investment Pool Management
The King County Investment Pool provides cash management and investment services for county agencies, cities, special districts, and other public entities. Treasury Operations manages the pool to support public fund management while following investment policies and applicable requirements.
The Investment Pool invests public funds and maintains appropriate liquidity for participating entities. The pool may invest in certain approved securities, including certificates of deposit, U.S. Treasury obligations, federal agency obligations, municipal obligations, repurchase agreements, and commercial paper.
Government entities seeking information about investment pool activities can review the official Investment Pool information, which includes reports, policies, agreements, and related documents.
Special Tax Programs
Admissions and Parking Taxes
King County levies admissions and parking taxes on certain events and venues. These taxes primarily apply to events held at specific stadiums and exhibit centers within the county.
Businesses or organizations responsible for these taxes must submit required reports and payments according to county requirements. Payments must be made using certified funds, including cash, cashier’s checks, or money orders payable to King County Treasury. Business and personal checks are not accepted for admissions and parking tax payments.
Gambling Tax Services
King County Treasury collects gambling taxes from businesses, nonprofits, and charities that operate gambling or gaming activities within the county.
Organizations subject to gambling taxes must submit quarterly tax returns. A return is required even when there is no gambling activity during the reporting period. Treasury Operations should be notified when an organization discontinues activity or closes, sells, or transfers a business.
Mobile Home Tax Services
Treasury Operations provides information related to paying property taxes, transferring ownership, or moving a mobile home in King County. Mobile home owners may need to contact the appropriate Treasury Operations service area to address account questions or tax-related requests.
Debt Management Activities
The Debt Management section of Treasury Operations issues and administers King County debt, including long-term and short-term debt instruments such as General Obligation bonds, Lease Revenue bonds, and Sewer Revenue bonds.
Debt proceeds support county capital activities, including public facilities, technology improvements, transportation projects, solid waste programs, water quality projects, and open space acquisitions.
Forms and Treasury Documents
Treasury Operations provides official forms for certain financial transactions. Available forms include the Miscellaneous Cash Receipt Form, Electronic Payment Request Form, and Electronic Payment Request Form Setup or Update Form.
Completed forms must follow the instructions provided by Treasury Operations. The county provides these documents through its Treasury Operations forms page.
Choosing the Right Contact
Treasury Operations has separate contacts for different types of questions. Property tax questions, mobile home issues, personal property matters, commercial property taxes, and foreclosure questions may require different contacts or service areas.
Providing accurate information when contacting the office can help staff identify the correct account or service. Customers should have relevant account numbers, property information, or tax documents available when requesting assistance.
Departments and Offices
King County Treasury Operations
201 S. Jackson St.
Seattle, WA 98104
Property Tax Customer Service
201 S. Jackson St.
Seattle, WA 98104
206-263-2890
Mobile Home, Personal Property, and Commercial Property Taxes
201 S. Jackson St.
Seattle, WA 98104
206-263-2844
Treasury Operations FAQs
How can I find answers to common King County property tax questions?
Property owners can review the official King County property tax FAQ for answers about tax statements, payment deadlines, account numbers, payment records, online payments, overpayments, refunds, and other common property tax concerns. The FAQ also explains differences between real property and personal property, including how business assets and certain mobile homes may be classified for tax purposes.
What happens if a property enters the King County tax foreclosure process?
A property may enter tax foreclosure when any one tax, assessment, fee, or lien becomes three years delinquent. Properties in foreclosure may be offered through a county auction process. Owners who want to remove a parcel from foreclosure must pay the required taxes, fees, interest, penalties, and foreclosure costs. Information about the process, auction procedures, and related requirements is available on the official property tax foreclosure information page.
How does the King County Investment Pool support public agencies?
The Investment Pool provides cash management and investment services for King County agencies, cities, special districts, and other public entities. It invests available funds according to approved investment policies and state requirements. The pool is limited to certain types of approved securities, including certificates of deposit, U.S. Treasury obligations, federal agency obligations, municipal obligations, repurchase agreements, and commercial paper.
What information is available for businesses that owe King County special taxes?
Businesses, nonprofits, and charities that operate gambling or gaming activities may need to submit quarterly gambling tax returns, including returns showing no activity during a reporting period. Organizations responsible for admissions and parking taxes must submit required reports and payments according to county requirements. Official forms and instructions for Treasury Operations transactions are available through the Treasury Operations forms page.