Where this comes from
Primary sources unless labelled secondary.
There is no federal rule. California’s two laws are the requirement that counts, and the first SB 253 emissions reports are due on 10 November 2026 if CARB’s regulation is approved.[3]
California’s laws reach any US company over the revenue thresholds that does business in the state, wherever it is headquartered. That captures much of corporate America.
The federal picture runs the other way: the SEC’s 2024 rule never took effect and is now proposed for rescission.[10]
The Climate Corporate Data Accountability Act requires an annual greenhouse gas inventory: Scope 1 and 2 from 2026 on the prior fiscal year, and Scope 3 from 2027 on a schedule CARB sets.[1]
Limited assurance on Scope 1 and 2 follows the first year, moving to reasonable assurance in 2030, when Scope 3 also gets limited assurance.[1] CARB estimated annual fees at $3,106 per entity.[5]
*CARB’s September 2026 guidance says the regulation applies “if approved by OAL”. We had not seen approval by 6 October 2026.
| Topic | SB 253: emissions | SB 261: climate risk |
|---|---|---|
| Who | US-organised entities with total revenue over $1bn that do business in California | US-organised entities with total revenue over $500m that do business in California; insurers exempt |
| What | Scope 1 and 2 greenhouse gas emissions every year; Scope 3 from 2027 | A climate-related financial risk report every two years, following TCFD, IFRS S2 or an equivalent framework |
| First due | 10 November 2026 (proposed), covering the prior fiscal year | Was 1 January 2026; not enforced while the injunction stands |
| Assurance | None for the 2026 report; limited from 2027; reasonable on Scope 1 and 2 from 2030 | None |
| Status | Statute in force; CARB's regulation awaits approval | Enjoined by the Ninth Circuit pending appeal |
SB 261 asks for a climate-related financial risk report every two years, prepared under TCFD, IFRS S2 or an equivalent, from US companies with more than $500m revenue doing business in California.[2]
On 18 November 2025 the Ninth Circuit granted an injunction pending appeal in Chamber of Commerce v. Sanchez, covering SB 261 only.[6] CARB said it would not enforce the 1 January 2026 deadline and ran a voluntary filing docket from 1 December 2025 to 1 July 2026.[7]
Oral argument was heard on 9 January 2026. As of early October 2026 there was no ruling.[8]
The SEC adopted its climate disclosure rule 3–2 on 6 March 2024 and stayed it a month later while challenges were heard in the Eighth Circuit. On 27 March 2025 it voted to stop defending the rule. The court put the case on hold in September 2025.
On 29 May 2026 the Commission voted unanimously to propose rescinding the rule in full. Comments closed on 3 August 2026; a final vote is the remaining step.[10],[11]
For US-listed companies, no federal rule requires greenhouse gas disclosure. Where a requirement exists, it comes from California, or from abroad through the EU, UK and ISSB regimes.
Filter by status. Bills modelled on SB 253 have moved furthest in New York.
S9072A passed the Senate 40–22 on 10 February 2026 and sits with the Assembly Codes committee. As drafted: Scope 1 and 2 from 2028, Scope 3 from 2029.[12]
S679 was reported from Senate committee on 12 February 2026; reporting would start three years after enactment.[13]
Entities organised in the United States with total annual revenue over $1bn that do business in California.[1] Under CARB’s regulation, revenue is the lesser of the two previous fiscal years. “Doing business” includes being organised or commercially domiciled in California, or California sales above $757,070 (the 2025 figure) or 25% of total sales.[4]
Penalties are capped at $500,000 per reporting year. Scope 3 misstatements made in good faith have a safe harbour, and from 2027 to 2030 Scope 3 penalties apply only to failing to file.[1]
Primary sources unless labelled secondary.