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Benefits, Payroll and Retirement

Benefits, Payroll and Retirement

Find information about your King County employee benefits, payroll, and retirement.

King County provides comprehensive benefits and services to eligible employees, retirees, and their dependents through strategic planning, negotiation, and implementation of benefit programs. Benefits, Payroll and Retirement Operations is here to help you with your medical, vision, and dental plan options; life and disability insurance; medical and dependent care reimbursement accounts; leave programs; payroll; and retirement planning.


Verify family members’ eligibility for benefits by July 29

King County and its labor partners are collaborating with our trusted vendor Mercer Consulting to conduct an eligibility verification of the dependents enrolled in our health plans. If you cover a family member on your King County medical, dental, or vision plan, you are required to verify the eligibility of each person by completing the process and providing documentation.

On June 18, Mercer sent a mailed letter to your home address and an email with instructions and details explaining the process. Employees are required to review plan eligibility requirements and provide documentation supporting the eligibility of each dependent or indicate removal for any family member who is not eligible.

Documents may include birth certificates; marriage certificates; tax returns; and documents that show relationship status, such as utility bills, bank statements, mortgage or lease, or vehicle registration. A Benefit Access Fee Audit form is also required for spouses and state-registered domestic partners enrolled in the KingCare PPO medical plan.

Complete the verification process and submit documents proving eligibility for each enrolled dependent through the Mercer secure portal by July 29, 2024. Failure to do so will result in the dependent being removed from coverage on Sept. 30, 2024.

For more information, see the FAQ, watch the Dependent Eligibility Verification Website Demo, or watch the overview video in English, KoreanPunjabi, RussianSimplified ChineseSpanishUkrainian, or Vietnamese. You can also call the Mercer Call Center: 866-703-3763.

Benefits and retirement

Phone 206-684-1556
Fax: 206-296-7700

Phone hours:
9 a.m. – 4 p.m. weekdays

Fax: 206-296-7678