For organizations that fall within the scope of CARB reporting, the cost of ignoring these requirements may extend well beyond a regulatory penalty. Weak emissions data, missed reporting timelines, inadequate governance, and poor documentation can create financial exposure while also affecting investor confidence, business relationships, and long-term resilience.
What You’ll Discover
- What is CARB?
- Which Organizations Are In Scope?
- What non-compliance can potentially cost businesses.
- What organizations should do now to strengthen CARB readiness.
- How technology can help create a more reliable and audit-ready reporting process.
What is the California Air Resources Board (CARB)?
The California Air Resources Board (CARB) is the state agency responsible for protecting public health and the environment by addressing air pollution and advancing climate action. Established in 1967, CARB has evolved into one of the most influential environmental regulatory bodies in the United States, with policies that often shape broader developments in climate and emissions regulation.
CARB develops, implements, and enforces regulations aimed at reducing greenhouse gas (GHG) emissions, improving air quality, and accelerating the transition to cleaner technologies. As part of its regulatory process, CARB also develops proposed rules and regulations for public consultation, allowing businesses, stakeholders, and other interested parties to provide feedback before regulations are finalized.
California’s climate disclosure and emissions reporting requirements form part of the state’s broader climate policy framework. These initiatives are designed to improve the availability, consistency, and transparency of corporate climate-related information, while supporting California’s long-term climate ambitions, including its goal of achieving carbon neutrality by 2045.
For businesses subject to California’s climate disclosure requirements, understanding CARB’s role is therefore critical. CARB’s evolving regulatory framework can have a direct impact on what companies report, how emissions data is prepared and substantiated, and the level of assurance expected over time.
Which organizations need to report on CARB
CARB’s reporting requirements apply to organizations and entities that fall within specific emissions, business activity, and revenue thresholds established under California’s climate disclosure and emissions reporting framework. The scope varies depending on the applicable regulation, including the Mandatory Reporting Regulation (MRR) and the requirements introduced under SB 253 and SB 261.
Organizations that may fall within the reporting landscape include:
- Industrial facilities that emit more than 10,000 metric tonnes of CO₂e annually under the applicable MRR requirements.
- Electricity generators and importers subject to California’s GHG reporting requirements.
- Fuel and energy suppliers, including suppliers of natural gas and petroleum-based fuels.
- Large U.S.-based business entities that do business in California and meet the applicable revenue thresholds under SB 253 ($1 billion) or SB 261 ($500 million).
- Organizations that voluntarily disclose climate-related information, driven by ESG commitments, investor expectations, customer requirements, or broader climate-transparency objectives.
It is important to note that CARB reporting obligations are not determined by revenue alone. Applicability can depend on factors such as the entity’s business activities, emissions profile, organizational structure, and whether it meets the specific criteria established under the relevant regulation.
For companies evaluating their obligations, the first step should therefore be to determine which CARB requirement applies to them, whether they meet the relevant thresholds, and what information they will be required to disclose.
Risks of CARB non-compliance
CARB’s climate reporting framework is designed to make corporate emissions and climate-risk information more accurate, transparent, comparable, and decision-useful. As these requirements move from voluntary disclosure toward mandatory reporting, non-compliance can create more than a regulatory concern; it can translate into financial, reputational, and operational risks for affected businesses.
For companies subject to requirements such as SB 253 and SB 261, the consequences of missing reporting obligations, submitting inaccurate information, or failing to meet applicable requirements can extend beyond penalties. Weak climate-data processes can also undermine investor confidence, create challenges during assurance or verification, and make it harder for companies to respond to increasing scrutiny from customers, lenders, regulators, and other stakeholders. CARB’s own regulatory materials emphasize the importance of reliable and comparable climate information for investors, lenders, insurers, consumers, and other stakeholders.
Financial penalties
Non-compliance can expose companies to civil penalties and enforcement action, depending on the applicable requirement and circumstances of the violation. Under SB 253, the statutory framework provides for penalties associated with reporting violations, while CARB has also indicated specific enforcement considerations for the initial reporting period. For example, CARB’s enforcement notice states that no penalties will be assessed in 2026 where companies demonstrate a good-faith effort to comply with the initial reporting requirements.
under SB 253
under SB 261
under CA Health & Safety Code
in certain CARB cases
- Up to $500,000 per reporting year under SB 253 for violations of the GHG emissions reporting requirements. This can include failures or deficiencies relating to required disclosures.
- Up to $37,500 per enforcement action may apply under California Health & Safety Code § 43016 for certain regulatory violations, depending on the specific provision involved.
- Penalties of up to $10,000 per violation per day may apply in certain CARB enforcement cases, with the actual amount depending on the nature, severity, and duration of the violation.
- Up to $50,000 per reporting year under SB 261 for failure to meet applicable climate-related financial risk reporting requirements.
Reputational risk
Regulatory non-compliance can also affect how a company is perceived by investors, customers, lenders, employees, and business partners. Publicly available climate disclosures are increasingly being used to evaluate corporate transparency, climate exposure, and the quality of sustainability governance.
Inaccurate, incomplete, or delayed disclosures can therefore weaken stakeholder confidence and raise questions about the reliability of a company’s broader ESG reporting.
Operational limitations
CARB may suspend permits or restrict business activities for serious violations. Such operational constraints can disrupt supply chains and create uncertainty for lenders and partners.
Best practices for CARB reporting
- Strengthen data collection processes
- Maintain governance and accountability
- Build staff capability
- Leverage technology solutions
- Align with financial and strategic priorities
“CARB compliance is not just about avoiding penalties; it is about building the data, governance, and accountability needed to stand behind every number you report.”
Christo Philip – ESG Consultant, Credibl
Credibl ESG’s take and our offerings
CARB compliance should not be a spreadsheet exercise; it should not be viewed as simply another regulatory disclosure to complete at the end of the reporting cycle.
Organizations that invest in reliable emissions data, clear ownership, standardized methodologies, and strong governance are better positioned to respond not only to CARB requirements but also to the growing landscape of climate-related reporting and assurance expectations.
At Credibl ESG, the focus is on helping organizations move from fragmented sustainability data to a more structured and controlled reporting environment.
Credibl ESG platform can help organizations centralize sustainability data, establish data ownership, standardize emissions calculations, track supporting evidence, apply validation controls, and generate reporting outputs from a consistent data foundation, organizations can confidently manage CARB compliance while aligning with broader ESG and climate disclosure regulations.
Top 5 Frequently Asked Questions
1. Does a company need to calculate all three emissions scopes for CARB reporting?
The requirements depend on the applicable regulation and reporting year. Under SB 253, Scope 1 and Scope 2 reporting begins before Scope 3 reporting, giving organizations an opportunity to strengthen their emissions-data processes before value-chain reporting becomes applicable.
2. Can companies use existing GHG accounting data for CARB reporting?
Existing GHG inventories can provide a useful starting point, but organizations should assess whether their current boundaries, methodologies, emission factors, data quality, and documentation meet the applicable CARB requirements.
3. Who should be responsible for CARB reporting within an organization?
CARB reporting should not sit entirely with the sustainability team. Depending on the organization’s structure, finance, procurement, operations, facilities, EHS, IT, legal, and business-unit teams may all contribute data or controls. Clear ownership and accountability are therefore essential.
4. How can technology reduce the effort involved in CARB reporting?
Technology can centralize data collection, automate calculations, standardize methodologies, apply validation rules, assign data ownership, maintain evidence trails, and streamline reporting. This can reduce dependence on fragmented spreadsheets and manual reconciliation.
5. What should a company look for in a CARB reporting solution?
Companies should consider capabilities such as emissions data collection, Scope 1–3 accounting, data validation, calculation traceability, evidence management, workflow approvals, audit trails, reporting flexibility, and the ability to support evolving regulatory requirements.
