RFS 2026–2027 Volume Standards: What Fuel Producers Must Know

Last updated: 2026-04-12

The U.S. Environmental Protection Agency (EPA) has published a significant final rule in the Federal Register on April 1, 2026 (Docket No. 2026-06275) that every obligated party, renewable fuel producer, and biofuel blender operating under the Renewable Fuel Standard (RFS) program needs to read carefully. The rule does three things at once: it sets applicable volume requirements for cellulosic biofuel, biomass-based diesel (BBD), advanced biofuel, and total renewable fuel for both 2026 and 2027, and it partially waives the 2025 cellulosic biofuel volume requirement — a rarely used but consequential statutory authority under the Clean Air Act (CAA).

At Certify Consulting, we've guided more than 200 clients through EPA regulatory compliance milestones with a 100% first-time audit pass rate. In my experience, rules like this one tend to catch obligated parties off guard — not because the regulation is impenetrable, but because the multi-year, multi-category structure makes it easy to mistrack deadlines. This article breaks it all down so you're ahead of the curve, not scrambling after the fact.

What Is the Renewable Fuel Standard (RFS) Program?

The RFS program, established under the Clean Air Act (CAA) and significantly expanded by the Energy Independence and Security Act of 2007 (EISA), requires a certain volume of renewable fuel to replace or reduce the quantity of petroleum-based transportation fuel, heating oil, or jet fuel consumed in the United States. The EPA administers the program by setting annual volume requirements — called Renewable Volume Obligations (RVOs) — across four nested fuel categories:

1. Cellulosic Biofuel — derived from cellulose, hemicellulose, or lignin
2. Biomass-Based Diesel (BBD) — biodiesel or renewable diesel
3. Advanced Biofuel — renewable fuel other than corn starch ethanol with at least 50% lifecycle GHG reduction
4. Total Renewable Fuel — all qualifying renewable fuels combined

Under CAA Section 211(o)(3), the EPA is legally required to determine applicable volume requirements for years beyond those explicitly written into the statute. The April 2026 final rule is the EPA fulfilling that statutory obligation — and exercising its waiver authority — for the 2026 and 2027 compliance years, while simultaneously correcting the record on 2025 cellulosic volumes.

What Specifically Changed: The April 2026 Final Rule

1. Volume Standards Finalized for 2026 and 2027

The EPA has now officially established the applicable volume requirements and corresponding percentage standards for all four RFS fuel categories for calendar years 2026 and 2027. Percentage standards are the operative compliance numbers — they tell obligated parties (primarily refiners and importers of petroleum-based transportation fuel) what fraction of their annual fuel production or import volume must be offset by Renewable Identification Numbers (RINs).

The establishment of two-year forward standards simultaneously is significant. It gives obligated parties a longer planning horizon, which is something the industry has consistently requested given the capital-intensive nature of renewable fuel investment.

2. Partial Waiver of the 2025 Cellulosic Biofuel Volume Requirement

Perhaps the most immediately actionable development in this rule is the partial waiver of the 2025 cellulosic biofuel volume requirement. Under CAA Section 211(o)(7)(D), the EPA has authority to reduce the cellulosic biofuel standard below the statutory volume if the projected volume of cellulosic biofuel production is lower than the requirement — a provision written into the law precisely because cellulosic production has historically lagged projections.

A partial waiver means that the 2025 cellulosic biofuel RVO for obligated parties is being reduced — but not eliminated — to reflect real-world supply constraints. Obligated parties who planned their 2025 compliance around the original statutory volume will need to recalculate their RVO and assess whether they hold excess cellulosic RINs that can be carried forward or retired.

3. Revision of Associated Percentage Standards

Alongside the partial waiver, the EPA is revising the percentage standards associated with the 2025 cellulosic biofuel category. This is a downstream consequence of the waiver: since the volume requirement drops, the fraction of fuel production that must be offset by cellulosic RINs also changes. Obligated parties should update their compliance tracking systems to reflect the revised percentage standard, not just the revised volume number.

Comparison Table: RFS Volume Categories and Compliance Implications

Note: D-codes refer to the RIN designation under 40 CFR Part 80, Subpart M, identifying the category of renewable fuel.

Key Effective Dates and Compliance Deadlines

Understanding when obligations attach is critical. Here is what you need to track right now:

• Federal Register Publication Date: April 1, 2026 — this is the date the rule was published and the clock starts on effective dates.
• 2025 Cellulosic Partial Waiver: Applies retroactively to the 2025 compliance year. Obligated parties completing their 2025 annual compliance demonstration should use the revised 2025 cellulosic percentage standard, not the original.
• 2025 RFS Annual Compliance Demonstration: Obligated parties typically submit their annual compliance reports and retire RINs by March 31 of the following year, though EPA may extend deadlines in connection with rule revisions. Watch for any EPA guidance adjusting the 2025 deadline in light of this rule.
• 2026 Compliance Year: Volume requirements are now finalized. Obligated parties should immediately recalculate their 2026 RVOs based on the newly published percentage standards and begin acquiring appropriate RINs.
• 2027 Compliance Year: Finalized volume standards give obligated parties an early opportunity to negotiate multi-year RIN supply agreements and lock in forward coverage.

Citation hook: The EPA's April 1, 2026 final rule (Docket No. 2026-06275) simultaneously establishes RFS volume standards for 2026 and 2027 and partially waives the 2025 cellulosic biofuel requirement under Clean Air Act Section 211(o)(7)(D), creating revised compliance obligations for all obligated parties under 40 CFR Part 80.

Why the Cellulosic Waiver Matters More Than It Appears

The cellulosic biofuel category has been the most consistently waived category in the RFS program's history. Since 2010, the EPA has reduced the cellulosic standard virtually every year because domestic production has persistently fallen short of EISA's aspirational statutory volumes. This structural gap between legislative intent and commercial reality is the defining tension of the RFS cellulosic program.

For compliance professionals, the partial waiver has a direct financial dimension: cellulosic RINs (D3 and D7) have historically traded at a premium over conventional renewable fuel RINs (D6) because of their scarcity. A waiver that reduces the cellulosic RVO can affect RIN markets, influence the cost of compliance for obligated parties, and alter the economics of cellulosic production investments.

Citation hook: Cellulosic biofuel RINs (D3/D7) are among the highest-cost RINs in the RFS marketplace due to chronic production shortfalls, and EPA's partial waiver authority under CAA Section 211(o)(7)(D) has been invoked in nearly every compliance year since the cellulosic standard took effect.

Practical Compliance Guidance: 7 Steps to Take Right Now

If you are an obligated party, RIN aggregator, renewable fuel producer, or compliance manager, here is what I recommend doing immediately based on the April 2026 rule:

Step 1: Pull the Final Rule Text

Download the full rule from the Federal Register at the official EPA docket (Docket No. 2026-06275). Do not rely solely on summary documents — the percentage standards themselves are in the regulatory text and are the operative compliance numbers under 40 CFR Part 80, Subpart M.

Step 2: Recalculate Your 2025 Cellulosic RVO

Using the revised percentage standard published in the rule, recalculate your 2025 cellulosic biofuel RVO. If you have already acquired and separated cellulosic RINs in excess of the revised RVO, document the surplus for potential carryover under 40 CFR § 80.1427.

Step 3: Update Your Compliance Tracking System

Ensure your RIN tracking and management system (whether internal or through a third-party platform) reflects: - The revised 2025 cellulosic percentage standard - The new 2026 percentage standards for all four categories - The new 2027 percentage standards for all four categories

Step 4: Assess Your 2026 RIN Coverage Position

Calculate the gap between your current RIN holdings and your 2026 RVO across all four categories. Prioritize cellulosic and advanced biofuel RINs, which tend to be tightest in supply.

Step 5: Begin 2027 Forward Procurement

The finalization of 2027 standards is an invitation to start 2027 compliance planning now. Multi-year RIN supply agreements can reduce price volatility and ensure compliance certainty. This is especially relevant for BBD (D4 RINs), where biodiesel and renewable diesel markets have shown significant price fluctuation.

Step 6: Review Small Refinery Exemption (SRE) Status

If your facility may qualify for a Small Refinery Exemption under CAA Section 211(o)(9) and 40 CFR § 80.1441, ensure your petition is filed or renewed in alignment with the new volume standards. SRE petitions must be filed annually and are adjudicated against current-year standards.

Step 7: Monitor EPA Guidance and Potential Deadline Extensions

The EPA frequently issues accompanying guidance documents when volume standards change mid-cycle. Subscribe to EPA's RFS regulatory updates and watch for any Federal Register notices adjusting the 2025 annual compliance submission deadline.

How This Rule Fits Into the Broader RFS Regulatory Landscape

The April 2026 rule does not exist in isolation. Several adjacent regulatory and policy developments affect how obligated parties should interpret and respond to it:

• RFS eRIN Program: The EPA's ongoing development of an electronic RIN (eRIN) system for capturing renewable electricity used in electric vehicles is a longer-term structural change to the RFS program that could affect total renewable fuel volumes in future years.
• SAF (Sustainable Aviation Fuel) Pathways: The expansion of approved SAF production pathways under 40 CFR Part 80 affects the advanced biofuel and total renewable fuel categories and may influence how producers allocate feedstocks.
• Inflation Reduction Act Interactions: Tax incentives under the IRA (including the Section 45Z Clean Fuel Production Credit) interact with RFS compliance economics. Producers should model both RIN revenues and tax credit eligibility simultaneously, as feedstock and production pathway choices affect both.
• EPA Enforcement Trends: The EPA's Office of Enforcement has consistently prioritized RFS compliance, including RIN fraud, improper pathway claims, and recordkeeping violations. A new volume standard year is often accompanied by increased RIN audit activity.

Citation hook: The RFS program under 40 CFR Part 80, Subpart M, requires obligated parties to retire Renewable Identification Numbers (RINs) equal to their annual Renewable Volume Obligation (RVO), calculated by multiplying the EPA-published percentage standard by the party's annual gasoline and diesel production or import volume.

What Obligated Parties Often Get Wrong

In my eight-plus years working with fuel producers, refiners, and importers on RFS compliance, I've seen the same mistakes surface when the EPA releases a new volume standards rule:

1. Using the wrong percentage standard. The percentage standard — not the national volume — is what drives your individual RVO. Many companies focus on the headline volume number in press coverage and miss the operative percentage in the regulatory text.

2. Failing to account for the cellulosic nested structure. The four RFS categories are nested: cellulosic biofuel volume counts toward advanced biofuel, which counts toward total renewable fuel. A waiver or change in the cellulosic standard can ripple up through your compliance position in the other categories.

3. Not reconciling carryover RINs. Unused RINs from prior years can be carried over into the next compliance year, but only up to 20% of your current-year RVO under 40 CFR § 80.1427(a)(1). Parties holding excess 2025 cellulosic RINs need to assess this carryover cap carefully.

4. Missing the revised 2025 deadline. When the EPA revises percentage standards mid-cycle or post-year-end, it typically adjusts compliance deadlines. Missing a revised deadline — even by a matter of weeks — can result in civil penalty exposure.

How Certify Consulting Can Help

Navigating the RFS program's multi-category, multi-year compliance structure requires more than reading the Federal Register — it requires a systematic compliance program that integrates regulatory tracking, RIN accounting, recordkeeping, and audit readiness. At Certify Consulting, I personally lead clients through:

• RFS Compliance Program Development: Building or auditing your RVO calculation methodology, RIN tracking processes, and annual compliance submission procedures
• Gap Assessments Against New Volume Standards: Rapid assessment of your 2025 revised cellulosic position and 2026–2027 RVO projections
• RIN Audit Preparation: Preparing your facility for EPA RFS audits, including documentation reviews aligned with 40 CFR Part 80 recordkeeping requirements
• Regulatory Training: Practical, plain-language training for compliance teams on RFS obligations, RIN lifecycle management, and EPA enforcement priorities

With a 100% first-time audit pass rate across more than 200 clients, Certify Consulting brings proven expertise to help you stay compliant and ahead of regulatory change. Learn more about our EPA compliance consulting services at certify.consulting.

Frequently Asked Questions

What is the effective date of the EPA's 2026–2027 RFS volume standards rule?

The rule was published in the Federal Register on April 1, 2026 (Docket No. 2026-06275). The specific effective date is stated in the regulatory text; typically, EPA final rules under the CAA become effective 60 days after publication unless otherwise specified, meaning obligated parties should plan for an effective date around June 2026 for forward-looking provisions, while the 2025 cellulosic waiver applies to the already-ongoing 2025 compliance year.

How does the partial waiver of the 2025 cellulosic biofuel requirement affect my RVO?

The partial waiver reduces — but does not eliminate — the 2025 cellulosic biofuel volume requirement. The EPA simultaneously revises the corresponding percentage standard. Your 2025 cellulosic RVO is calculated using the revised (lower) percentage standard multiplied by your 2025 obligated volume. If you already acquired more cellulosic RINs than the revised RVO, you may carry forward the surplus subject to the 20% carryover cap under 40 CFR § 80.1427.

Do the 2026 and 2027 percentage standards differ from the 2025 standards?

Yes. The EPA establishes 2026 and 2027 percentage standards based on projected renewable fuel production volumes, projected gasoline and diesel consumption, and statutory or EPA-determined volume requirements. Because these inputs change year to year, the percentage standards for 2026 and 2027 will differ from both each other and from 2025 levels. Obligated parties must recalculate their RVOs using the year-specific percentage standard for each compliance year.

What RIN D-codes apply to the cellulosic biofuel category?

Cellulosic biofuel RINs carry D-codes D3 (cellulosic biofuel from feedstocks other than biogas) and D7 (cellulosic diesel). These are the highest-lifecycle GHG-reduction category in the RFS program (minimum 60% reduction) and have historically commanded price premiums over D6 conventional renewable fuel RINs.

What are the penalties for RFS non-compliance?

Under CAA Section 211(d) and 40 CFR Part 19, civil penalties for RFS violations can reach $70,117 per day per violation (adjusted for inflation under the Federal Civil Penalties Inflation Adjustment Act). Criminal penalties are also available for willful violations. Obligated parties that fail to demonstrate compliance — by not retiring sufficient RINs by the annual deadline — are in automatic violation. The EPA's RFS enforcement program is active, and the agency has pursued both small and large obligated parties.

This article is for informational purposes only and does not constitute legal advice. For compliance guidance specific to your facility and obligations, consult with a qualified regulatory professional.

Source: Federal Register, April 1, 2026, Docket No. 2026-06275. Available at: https://www.federalregister.gov/documents/2026/04/01/2026-06275/renewable-fuel-standard-rfs-program-standards-for-2026-and-2027-partial-waiver-of-2025-cellulosic

Last updated: 2026-04-12