From the Department of Retirement Systems:
Cost-of-Living Adjustments (COLAs) for DRS-administered retirement systems and plans that receive a COLA have been established for 2022. LEOFF Plan 1 COLAs will take effect April 1 and will be reflected in end-of-April benefit payments. For all other plans that are eligible for a COLA, the COLA will take effect July 1 and will be reflected in end-of-July benefit payments.