Retirement benefit cost-of-living adjustments (COLAs) are determined by the consumer price indexes calculated and maintained by the U.S. Bureau of Labor Statistics. The Consumer Price Index (CPI) is a measure of the changes in prices of all goods and services purchased for consumption by urban households. We update this page in early March of each year.
Separate indexes are produced for regional urban areas and the nation as a whole. Indexes are further specified "all urban consumers" (CPI-U), and "urban wage-earners and clerical workers" (CPI-W). The indexes below are used to determine annual benefit increases for Plan 2 and 3, the Washington State Patrol, and a handful of Plan 1 retirees who selected a benefit payment option that provides a Plan 2-style COLA.