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Low Carbon Fuel Standard (LCFS): Driving Clean Energy With Carbon Limits

Onye Dike
Written by Onye Dike
Updated on June 30th, 2025
4 min read
Published Mar 20, 25

Summary

California's Low Carbon Fuel Standard (LCFS) is a market-based program launched in 2011 and administered by the California Air Resources Board (CARB) to reduce greenhouse gas emissions from transportation fuels. It sets progressively lower carbon intensity (CI) targets, encouraging fuel producers to adopt cleaner technologies. Among other requirements, affected entities must report their emissions quarterly and annually through the LCFS Reporting Tool and Credit Bank & Transfer System (LRT-CBTS), with compliance verified through CARB-approved methods. The program applies to entities including refiners, biofuel producers, and electricity suppliers.
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Details

Jurisdictions
  • California
Mandatory for

Producers or importers of liquid fuels and gaseous fuels as defined in the regulation.

Deep dive


Background

The California Low Carbon Fuel Standard (LCFS) is a market-based regulatory program designed to reduce greenhouse gas emissions in the transportation sector under the California Global Warming Solutions Act of 2006. The LCFS has been implemented in California since 2011 by the California Air Resources Board (CARB) following its approval in 2009. The LCFS aims to promote the use and production of cleaner, low-carbon transportation fuels in California, thereby reducing greenhouse gas (GHG) emissions and decreasing reliance on petroleum in the transportation sector. The LCFS sets standards based on the Carbon Intensity (CI) of gasoline, diesel, and their alternatives, measuring the total life cycle greenhouse gas emissions associated with each fuel. This life cycle assessment accounts for emissions of Carbon dioxide (CO₂), Methane (CH₄), Nitrous oxide (N₂O), and other GHGs generated during the fuel's production, transportation, and consumption. The carbon intensity (CI) scores assigned to each fuel are evaluated against an annually declining CI benchmark. Fuels with a CI below the benchmark generate credits, while those above the benchmark generate deficits. For each annual compliance period, the LCFS requires transportation fuel providers to show that the mix of fuels they supply in California complies with the LCFS carbon intensity standards or benchmarks. The LCFS is part of California's broader climate strategy which includes the Mandatory Greenhouse Gas Reporting Program (MRR) and more recently the Climate Corporate Data Accountability Act (CCDAA). The LCFS incentivizes fuel producers to lower the carbon footprint of their products by earning credits for low-carbon fuel production or purchasing credits from other compliant entities.

Reporting Requirements

Under the LCFS, carbon emissions reporting is a major requirement to ensure compliance. Fuel suppliers, including refiners, importers, and blenders, must submit detailed life cycle emissions data to CARB through the LCFS Reporting Tool and Credit Bank & Transfer System (LRT-CBTS). This data must be reported quarterly and annually to verify compliance with CI reduction targets. An Annual Compliance Report, due by April 30 of each year, is a key document in which regulated entities show their compliance with the program. Fuel producers must track and report their emissions from production, transportation, and end-use consumption, using CARB-approved methodologies, tools, and verification procedures. For each annual compliance period, fuel providers are required to show that the mix of fuels they supply in California complies with the LCFS carbon intensity standards or benchmarks.

Penalties for Noncompliance

Enforcement of the LCFS is strict, with penalties for noncompliance ranging from financial fines to legal actions. As stated in the LCFS regulations, if a regulated entity fails to meet its CI reduction targets, it must buy additional LCFS credits or face penalties under California Health and Safety Code Section 38580. CARB has the authority to impose fines of up to $10,000 per day per violation for noncompliance. Moreover, companies that misrepresent emissions data may be subject to audits, increased penalties, and possible suspension from the program. According to enforcement data provided by the CARB, there have been 25 settlements between April 2017 and June 2025 in relation to LCFS violations. For instance, BP Products North America, Inc. (BP), and AltAir Paramount LLC (AltAir) were respectively fined $188,000 and $132,500 for violating section 95494 of the LCFS regulation which requires quarterly and annual reports to be submitted completely and accurately.

Current Status

As of June 2025, the LCFS remains in full effect, with updates taking effect from July 1, 2025. The Office of Administrative Law officially approved CARB’s revised rule package on June 27, 2025, confirming a 9 percent tightening of the 2025 carbon-intensity targets for gasoline and diesel and reinstating the July 1 effective date CARB requested. Once delayed for six months due to clarity concerns, the resubmitted amendments now apply to all fuels supplied from July 1 onward, aligning the first half of the year with the prior standards and marking a clear transition point into the new regime. This reinstatement provides regulatory consistency and renewed certainty to suppliers navigating compliance obligations under the strengthened LCFS framework.

Resources


Onye Dike
Written by:
Onye Dike
Sustainability Research Analyst
Onye Dike is a Sustainability Research Analyst at Net Zero Compare, where he contributes to research and analysis on environmental regulations, carbon accounting, and emerging sustainability trends.