California climate disclosure laws
California's climate disclosure laws create two reporting tracks for large companies doing business in the state. SB 253 covers greenhouse gas emissions. SB 261 covers climate-related financial risk. GreenKPO helps teams build the data, evidence and reporting process behind those disclosures — without replacing legal counsel.
Check applicability
Screen entity, revenue and California nexus before building a reporting calendar.
Does SB 253 or SB 261 apply? →Prepare SB 253 reporting
Run a readiness review across boundary, Scope 1/2 sources, evidence and controls.
SB 253 readiness review →See the software
Turn finance, facilities and supplier data into a controlled disclosure-ready dataset.
California climate disclosure software →Status note
Last reviewed: 16 September 2026
As reviewed on 16 September 2026, CARB describes a proposed deferral of the first Scope 1 and Scope 2 reporting deadline from 10 August to 10 November 2026. Check CARB’s corporate greenhouse gas reporting program page and rulemaking status page for the approved deadline, filing instructions and first-year requirements before submission. Do not treat a proposed date as a confirmed final deadline.
SB 261 addresses climate-related financial risk reporting. CARB’s published SB 261 enforcement advisory states that it will not enforce the 1 January 2026 reporting deadline following a court injunction. Check current CARB guidance and legal developments before setting a reporting calendar. GreenKPO supports emissions data and evidence that may inform wider disclosure work; it does not replace climate-risk assessment or legal advice.
SB 253 emissions reporting vs SB 261 climate-risk reporting
SB 253 is greenhouse-gas emissions reporting. As described in current primary sources, it generally applies to qualifying US entities with revenue exceeding $1 billion, subject to the applicable entity definitions, California business test and exclusions. Scope 1 and Scope 2 reporting is staged ahead of Scope 3 — do not assume all three scopes share one initial deadline.
SB 261 is climate-related financial risk reporting. As described in current primary sources, it generally applies where revenue exceeds $500 million, again subject to entity definitions, the California business test and exclusions. Validate both laws against current CARB program and rulemaking materials before setting your calendar. Use the applicability guide for operational screening — it does not decide the legal obligation.
What California reporting teams actually need
- Boundary — which legal entity and operations are in scope
- Source data — utilities, fuel, fleet, travel, facilities and supplier inputs
- Calculations — factors, methods and reproducible workbooks
- Evidence — source files, timestamps, owners and change history
- Review & filing support — approvals, reviewer pack and submission trail
Spreadsheets & email vs a structured workflow
Typical spreadsheet approach
Detached source files, unexplained figures, version confusion and last-minute evidence reconstruction when reviewers ask for proof.
GreenKPO structured workflow
Ingest → validate → calculate → evidence → review → report — with owners, timestamps and a reusable process for the next cycle.
SB 253 at a glance
Annual Scope 1, 2 and 3 greenhouse gas emissions reporting for qualifying entities above the statutory revenue threshold. Start with a readiness review, then move into an SB 253 compliance workflow.
SB 261 at a glance
Biennial climate-related financial risk reporting under the statute. Confirm current legal and enforcement status with counsel before setting a calendar. GreenKPO focuses on emissions data, evidence and reporting workflow layers that often feed related disclosure work — it does not replace climate-risk advisory or legal conclusions.
From finance and facilities data to traceable disclosure
GreenKPO, built on KPOData and operated by Global ITN, helps structure activity records so figures stay linked to source files, owners and review history.
Common questions
Does having customers in California automatically mean the laws apply?
Not necessarily. Coverage depends on the governing definition of doing business in California, the applicable revenue test, entity structure and exclusions. Document the analysis — or start with the applicability guide.
What data do we need for SB 253?
Typically facility and energy activity data for Scope 1 and Scope 2, emission factors, boundary decisions and an evidence trail. Scope 3 needs a supplier and category plan — see the supplier data guide.
What does GreenKPO do — and not do?
GreenKPO helps structure data collection, calculations, evidence and reporting workflow. It does not provide legal applicability conclusions, guarantee compliance, or replace assurance providers. Final legal positions belong with qualified counsel.
How long does implementation take?
Most teams start with Scope 1 and Scope 2 source mapping, then add supplier/Scope 3 progressively. Timeline depends on data readiness — a walkthrough can scope your current sources quickly.
Build a controlled California disclosure workflow
Start with applicability, run a readiness review, or book a walkthrough of the reporting workflow.