CARB Provides New Guidance On SB 253 Reporting

On July 21, the California Air Resources Board (“CARB”) held a public workshop to provide updates on the implementation of SB 253, the Climate Corporate Data Accountability Act, which requires U.S.-based entities doing business in California with more than $1 billion in annual revenue to disclose their Scope 1, 2 and 3 greenhouse gas (“GHG”) emissions. During the workshop, CARB introduced a revised reporting deadline, a phased-in approach to Scope 3 reporting, changes to the treatment of insurance companies, and proposed assurance requirements that would apply from 2027 and beyond.

Key Takeaways

• Reporting Deadline: On February 26, 2026, CARB approved the initial SB 253 regulation which set out an initial reporting deadline of August 10, 2026. However, given the current proposed changes to the regulations, CARB is introducing a new initial reporting deadline of November 10, 2026 for Scope 1 and Scope 2 emission reporting. CARB staff indicated they will share additional guidance