What is the key difference between SB 253 and SB 261?

The key difference is focus: SB 253 requires quantitative greenhouse gas emissions reporting across Scope 1, Scope 2, and Scope 3, while SB 261 requires qualitative climate-related financial risk disclosures explaining how climate change may affect the business.

Which companies must comply with SB 253 vs SB 261?

SB 253 applies to companies doing business in California with more than 1 billion dollars in annual revenue. SB 261 applies to companies doing business in California with more than 500 million dollars in annual revenue, with insurance companies generally exempt.

What reporting frameworks are used for SB 253 and SB 261?

SB 253 is aligned with the Greenhouse Gas Protocol for emissions reporting, while SB 261 follows the TCFD framework or equivalent standards such as IFRS S2 for climate-related financial risk disclosures.

How often do companies need to report under each law?

SB 253 requires annual reporting of greenhouse gas emissions. SB 261 requires a climate-related financial risk report every two years, beginning in 2026.

Does SB 253 require third-party assurance while SB 261 does not?

Yes, SB 253 requires phased third-party assurance, starting with limited assurance for Scope 1 and Scope 2 and moving toward reasonable assurance. SB 261 does not currently mandate third-party assurance.

What penalties differ between SB 253 and SB 261?

SB 253 carries significantly higher penalties, with fines up to 500,000 dollars per reporting year. SB 261 penalties are capped at 50,000 dollars annually for failure to publish or inadequate risk disclosures.

How do SB 253 and SB 261 work together?

The two laws are complementary. SB 253 measures a company’s climate impact through emissions data, while SB 261 evaluates how climate risks affect the company’s financial performance, strategy, and resilience.

SB 253 vs SB 261: Key Differences Explained

3 min. read
Anviksha Mishra

Why Compare SB 253 and SB 261?

SB 253 vs SB 261 is the critical comparison for businesses navigating California’s Climate Accountability Package, which introduced two distinct disclosure laws aimed at making corporate climate risk transparent and investor-grade.

If your business is affected by one, it may very well be affected by the other. Understanding how these laws differ—and where they intersect—is critical to preparing your teams, timelines, and tools.

At a Glance: SB 253 vs SB 261

Here’s a quick SB 253 vs SB 261 side-by-side overview to help companies identify compliance obligations:

Category	SB 253	SB 261
Primary Focus	Greenhouse gas emissions disclosure	Climate-related financial risk disclosure
Threshold	Revenue > $1 billion	Revenue > $500 million
Frequency	Annually	Biennially
Start Year	2026 (Scope 1 & 2), 2027 (Scope 3)	2026
Key Standard	Greenhouse Gas Protocol	TCFD (Task Force on Climate-related Financial Disclosures)
Assurance Requirement	Yes (third-party audit)	No (self-published)
Applies to Private Companies?	Yes	Yes
Reporting Format	Filed to emissions reporting platform	Published on company’s website
Penalty Cap	$500,000/year	$50,000/year

What SB 253 Requires

SB 253, or the Climate Corporate Data Accountability Act, requires large companies to disclose their full greenhouse gas emissions footprint—Scopes 1, 2, and 3.

Scope 1: Direct emissions
Scope 2: Indirect emissions from purchased energy
Scope 3: All other indirect emissions, such as supply chain, product use, commuting, etc.

These disclosures must follow the GHG Protocol and be submitted through a state-designated platform, with third-party assurance required starting in 2026 for Scopes 1 and 2, and in 2030 for Scope 3.

What SB 261 Requires

SB 261 focuses on climate-related financial risks. Companies must disclose:

The risks climate change poses to their operations, supply chains, assets, and financial outcomes
What steps they are taking to reduce or adapt to those risks

Reports must follow the TCFD framework or an equivalent disclosure standard and be published on the company’s own website, not submitted to a central database.

No third-party audit or assurance is required, though incomplete reports must explain the gaps and outline steps toward full disclosure.

Who Needs to Comply with Each Law

Company Type	SB 253	SB 261
Public Companies	✅	✅
Private Companies	✅	✅
Global Companies with CA Operations	✅	✅
Insurance Companies	✅	❌ (Exempt from SB 261)
Companies under $500M Revenue	❌	❌

Important: Both laws apply to any company “doing business in California,” regardless of where it is headquartered.

Timelines and Reporting Frequency

SB 253 Timeline:

2025: CARB adopts final regulations
2026: Scope 1 and 2 emissions reporting begins
2027: Scope 3 emissions reporting begins
2030: Reasonable assurance begins for Scope 1 & 2; limited assurance for Scope 3

SB 261 Timeline:

2026: First report due (Jan 1)
2028, 2030, etc.: Reports required every two years

Reporting Standards and Formats

Requirement	SB 253	SB 261
Standard	Greenhouse Gas Protocol	TCFD or IFRS S2
Format	Numeric emissions inventory	Narrative risk assessment
Delivery	Submit to emissions platform	Publish on company’s website
Scope	Operations + value chain (Scope 1–3)	Financial and operational risk exposure

SB 253 measures quantitative emissions.
SB 261 describes qualitative risks and strategic responses.

Both matter, and both require different teams (ESG, legal, finance, operations) to coordinate internally.

Penalties for Non-Compliance

Penalty Type	SB 253	SB 261
Maximum Annual Fine	$500,000	$50,000
Trigger Events	Non-filing, late filing, misstatements	Failure to publish, insufficient report
Safe Harbor	Good-faith Scope 3 estimates protected (until 2030)	Gaps allowed if explained with roadmap

California’s enforcement approach focuses on timely and transparent disclosure, not perfection. But companies that ignore the requirements altogether will face significant financial and reputational risk.

Do These Laws Overlap?

Yes, but they serve complementary purposes.

SB 253 answers: What are your emissions?
SB 261 asks: How will climate risk affect your business?

One focuses on data. The other focuses on strategy.

Together, they create a dual lens—what your impact is on the climate (emissions), and how climate change impacts you (financial risk).

If you’re already preparing for one, building capacity for the other is a natural next step.

Preparing for SB 253 and SB 261?

Collect and verify Scope 1, 2, 3 data
Align with GHG Protocol and TCFD
Simplify internal coordination across sustainability, finance, and compliance
Publish investor-grade reports that meet California’s climate standards

Sprih helps businesses understand SB 253 vs SB 261 requirements, streamline compliance, and prepare accurate reports that meet California’s climate standards.