WA HB2626

Increases the insurance premium tax rate from 2% to 3% for health maintenance organizations, health care service contractors, and self-funded multiple employer welfare arrangements, effective March 1, 2027

Creates a new 1% premium tax on disability insurers and group stop loss insurers for health care services premiums, including dental and optometry services, effective March 1, 2028

Removes the existing tax exemption for dental-only health care services provided by health care service contractors and health maintenance organizations

Requires quarterly prepayments of tax obligations: 45% by June 15, 25% by September 15, and 25% by December 15

Act takes effect July 1, 2026