The deadline to file for the 2025-26 Measure O Senior Exemption was January 31, 2025. 

Next year's exemption form will be available when the 2026-27 tax bills are mailed out. Please stay tuned to Contra Costa County Fire Protection District's website for more information. If you signed up for e-billing you can find your bill by logging in to the Contra Costa County Tax Collector's website.