• California regulators proposed moving the first corporate greenhouse gas reporting deadline from August 10 to November 10.
• The delay applies to companies with more than $1 billion in annual revenue that do business in California.
• The rule remains legally contested as federal climate disclosure policy also shifts away from mandatory reporting.

California Gives Companies More Time Before First Reports

California’s air pollution regulator is preparing to delay a major corporate climate reporting deadline by three months. The move gives large companies more time before filing their first mandatory greenhouse gas emissions reports under the state’s landmark disclosure rules.

The California Air Resources Board, known as CARB, said it plans to move the reporting deadline from August 10 to November 10. The change would apply to companies with more than $1 billion in annual revenue that do business in California.

The regulator said the delay follows its decision to make “limited proposed changes” to the rule package. Those changes may slow final approval by the California Office of Administrative Law.

CARB said: “A new proposed reporting deadline of November 10 will help ensure reporting entities have additional clarity following approval of the final regulation before reporting is due.”

The delay matters beyond California. The state’s climate laws could affect thousands of U.S. companies, including many headquartered elsewhere. CARB has already issued a preliminary list of more than 4,000 companies likely to fall under the rules.

What the Rules Require

California’s corporate climate reporting framework comes from two laws: SB 253 and SB 261. Both were signed into law in October 2024.

SB 253, the Climate Corporate Data Accountability Act, requires large companies to report greenhouse gas emissions each year. Covered entities include U.S.-organized companies doing business in California with annual revenue above $1 billion.

The law covers Scope 1, Scope 2, and Scope 3 emissions. That includes direct operations, energy use, supply chains, business travel, employee commuting, procurement, waste, and water usage.

However, the first reporting year focuses only on Scope 1 and Scope 2 emissions. Scope 3 reporting is scheduled to begin in 2027.

SB 261 creates a separate climate-related financial risk reporting requirement. It applies to companies doing business in California with annual revenue above $500 million. Those companies must disclose climate-related financial risks and explain how they are reducing or adapting to those risks.

Together, the laws would create one of the most significant climate disclosure regimes in the U.S. They also reach far beyond state borders because California’s economy touches nearly every major corporate sector.

RELATED ARTICLE: California Regulators Approve Plan to Slash Emissions 85% by 2045

Regulatory Changes and Legal Pressure

CARB approved the initial regulation for SB 253 and SB 261 earlier this year. It then submitted the rule package to the California Office of Administrative Law on May 20 for final review.

The agency has since withdrawn that submission. CARB said it will release limited changes for a 15-day public comment period before resubmitting the package.

The new step creates a timing issue. Without a delay, companies would face an August 10 reporting deadline soon after final approval. CARB said the proposed November deadline gives reporting entities more certainty before their first filings.

Legal pressure adds another layer of uncertainty. Litigation over California’s climate reporting requirements remains pending at the U.S. Ninth Circuit Court of Appeals.

The court has already paused enforcement of SB 261 while an appeal proceeds. That means the climate risk reporting requirement remains on hold, even as CARB continues work on the emissions disclosure rule.

Federal Retreat Raises California’s Profile

California’s delay comes as federal climate disclosure policy moves in the opposite direction. The U.S. Securities and Exchange Commission has been seeking to formally end Biden-era climate disclosure rules for publicly traded companies.

That split increases the importance of state-led disclosure mandates. If the SEC retreats, California could become the most consequential climate reporting jurisdiction for U.S. companies.

For C-suite leaders, the message is clear. The compliance calendar may shift, but the reporting direction has not disappeared.

Large companies with California exposure still need emissions data systems, internal controls, governance oversight, and board-level accountability. Investors will also watch how firms prepare for Scope 3 reporting, which remains the most complex part of the law.

The three-month delay offers breathing room, not a reset. It gives companies more time to prepare for California’s first filings while regulators finalize the rule.

For global investors and sustainability leaders, California’s decision keeps one of the world’s largest economies at the center of the climate disclosure debate. The deadline may move to November, but the policy fight over corporate climate transparency is still accelerating.

ESG News Editorial Team

The ESG News Editorial Team is comprised of veteran financial journalists and sustainability analysts dedicated to providing real-time, objective reporting on global ESG regulations, climate finance, and corporate governance. Our desk monitors daily developments from the SEC, IFRS, CSRD and international regulatory bodies to ensure our 1M+ readers receive accurate, data-driven insights into the evolving sustainable investment landscape. Follow the ESG News Editorial Team for expert reporting on global sustainability standards, ESG disclosures, and climate policy. Access over 10,000 investigative reports and real-time updates.