EPA RFS 2026–2027 Volume Standards: What Changes Now

Last updated: 2026-04-08

The U.S. Environmental Protection Agency (EPA) has finalized a significant regulatory update to the Renewable Fuel Standard (RFS) program, publishing new volume requirements for 2026 and 2027 in the Federal Register on April 1, 2026 (Docket No. EPA-HQ-OAR-2025-0218; FRL No. 2026-06275). The rule also partially waives the 2025 cellulosic biofuel volume requirement and revises the associated percentage standards — developments that carry real compliance implications for obligated parties, renewable fuel producers, and any organization operating within the RFS ecosystem.

If your organization generates, blends, imports, or trades Renewable Identification Numbers (RINs), this rule is not background noise — it is a direct compliance obligation. Here is what changed, why it matters, and what you need to do.

What Is the RFS Program and Why Does It Matter?

The Renewable Fuel Standard (RFS) is a federal program established under the Clean Air Act (CAA), specifically under Section 211(o), that requires transportation fuel sold or introduced into commerce in the United States to contain a minimum volume of renewable fuels. The program is administered by the EPA and applies to refiners, blenders, and importers — collectively known as "obligated parties."

Under the CAA, once the statutory volume mandates (which ran through 2022) expired, the EPA assumed authority to determine applicable volumes for subsequent years. This is the legal basis for the April 2026 rulemaking. The EPA's authority to set post-statutory RFS volumes is grounded in Clean Air Act Section 211(o)(2)(B), which grants the agency discretion to establish volumes "based on a review of the implementation of the program."

The RFS covers four nested categories of renewable fuel:

Each category has its own volume requirement expressed in billions of gallons, and a corresponding percentage standard — the share of total fuel volume that must be renewable — which is calculated annually based on projected fuel demand.

What the EPA Finalized: 2026 and 2027 Volume Requirements

The April 2026 final rule establishes applicable volumes and percentage standards across all four RFS fuel categories for compliance years 2026 and 2027. While the EPA has not yet published the full numerical table in all reporting formats, the rule's structure follows the same framework as prior annual rulemakings (e.g., the 2023–2025 rule published in 2023).

Key Regulatory Changes in This Rule

1. New Applicable Volumes for 2026 and 2027 The EPA is setting volume requirements for cellulosic biofuel, biomass-based diesel, advanced biofuel, and total renewable fuel for both compliance years. These volumes become binding obligations for all obligated parties beginning January 1, 2026.

2. Revised Percentage Standards Percentage standards — which translate volume requirements into obligated party-specific RIN obligations — are recalculated based on updated projections of U.S. transportation fuel demand. Any change in the percentage standard directly affects how many RINs an obligated party must retire to demonstrate compliance.

3. Partial Waiver of the 2025 Cellulosic Biofuel Volume Requirement This is arguably the most operationally significant element of the rule. Under CAA Section 211(o)(7)(D)(i), the EPA is authorized to reduce (waive) the cellulosic biofuel volume if projected production is insufficient to meet the statutory or previously established volume. The EPA has exercised this authority for 2025, partially waiving the cellulosic biofuel volume to align with actual projected supply.

The EPA's partial waiver of the 2025 cellulosic biofuel volume requirement reflects a continued structural gap between statutory ambition and commercial-scale cellulosic fuel production — a gap that has persisted since the RFS program's inception. According to the EPA's own tracking data, cellulosic biofuel production has consistently fallen short of originally mandated volumes; EPA has issued cellulosic waivers in every compliance year since 2010.

Why the Partial Cellulosic Waiver Matters for Compliance

When the EPA partially waives the cellulosic biofuel volume, it triggers a cascading set of adjustments:

• The cellulosic percentage standard is revised downward to reflect the waived volume.
• Advanced biofuel and total renewable fuel volumes may also be adjusted proportionally, since cellulosic biofuel is nested within those categories.
• Waiver credits may be available to obligated parties who cannot find sufficient cellulosic RINs (D3 or D7 RINs) to meet their obligation — these are purchased directly from the EPA at a regulated price.

For compliance officers and RIN portfolio managers, the practical implication is clear: if your 2025 compliance strategy was built around retiring D3/D7 cellulosic RINs, you must recalculate your obligation based on the revised percentage standard published in this rule. The partial waiver does not eliminate your cellulosic obligation — it reduces it. You still need to retire the required volume of D3/D7 RINs or purchase EPA waiver credits for the remaining gap.

Effective Dates and Compliance Deadlines

Understanding the timeline is non-negotiable for compliance planning:

Critical note: The 2026 compliance year volume requirements are retroactively applicable from January 1, 2026, even though the rule published on April 1, 2026. This is standard RFS practice, but it means obligated parties must account for Q1 2026 fuel volumes under the newly finalized standards — not the proposed standards. Review your Q1 2026 RIN retirement projections immediately.

Who Is Directly Affected by This Rule?

The RFS program's compliance obligations fall primarily on obligated parties — a defined regulatory term. However, the ripple effects extend broadly:

Obligated Parties (Direct Compliance Obligation)

• Petroleum refiners
• Petroleum importers
• Petroleum blenders (under certain conditions)

These entities must calculate their Renewable Volume Obligation (RVO) using the finalized percentage standards and retire sufficient RINs by the annual deadline.

Indirectly Affected Parties

• Renewable fuel producers and importers — D-code RIN generation volumes will be affected by revised market demand signals
• RIN traders and brokers — Revised percentage standards shift RIN supply/demand dynamics
• Fuel retailers and distributors — While not obligated parties, downstream market pricing reflects RIN compliance costs
• Environmental management professionals — Organizations with sustainability commitments or ISO 14001-aligned environmental programs that track GHG reductions from biofuel use

Practical Compliance Guidance: 5 Steps to Take Now

Based on my work with 200+ clients across regulated industries at Certify Consulting, here is the structured compliance response I recommend for any organization with RFS exposure:

Step 1: Verify Your Obligated Party Status

Confirm whether your organization qualifies as an obligated party under 40 CFR Part 80, Subpart M. This determination drives everything downstream. If you refine, import, or blend covered fuel, you likely have an RVO.

Step 2: Recalculate Your 2025 and 2026 RVOs

Using the revised percentage standards published in the April 1, 2026 rule, recalculate your Renewable Volume Obligation for both 2025 (incorporating the cellulosic waiver) and 2026. Your compliance software or RIN tracking system should be updated to reflect the new standards immediately.

Step 3: Audit Your Current RIN Inventory

Conduct a current-state audit of your RIN holdings by D-code (D3, D4, D5, D6, D7). Compare your holdings against your recalculated RVOs. Identify any gaps, particularly in D3/D7 cellulosic RINs for 2025.

Step 4: Address the 2025 Cellulosic Gap

If your D3/D7 inventory is insufficient to meet even the partially waived 2025 obligation: - Acquire additional D3/D7 RINs from the open market - Purchase EPA-issued cellulosic waiver credits at the EPA's published price (available directly from EPA under 40 CFR §80.1456) - Document your compliance rationale thoroughly for audit purposes

Step 5: Establish a 2026–2027 Compliance Plan

With two years of volume requirements now finalized, develop a 24-month RIN acquisition strategy. Locking in forward RIN purchase agreements or fuel supply contracts with built-in RIN transfer provisions can significantly reduce compliance cost volatility. Document this plan as part of your environmental compliance program — particularly if your organization maintains an ISO 14001 Environmental Management System (EMS), where legal obligation tracking is a core requirement under ISO 14001 clause 6.1.3 (compliance obligations).

The Bigger Picture: RFS Trajectory and Environmental Compliance

Since the RFS program launched, the EPA has never been able to enforce the full statutory cellulosic biofuel volume — it has issued partial or full waivers in every year from 2010 through at least 2025. This is not a criticism of the program; it reflects the technological and commercial reality of scaling cellulosic fuel production. But it does mean that compliance professionals should treat cellulosic volumes as subject to annual revision rather than fixed targets.

The 2026–2027 volumes for biomass-based diesel and advanced biofuel, by contrast, have historically been set at or above statutory minimums, reflecting the commercial maturity of biodiesel and renewable diesel supply chains.

For organizations with sustainability programs, the RFS intersects with broader environmental performance metrics. Tracking RIN retirement data, biofuel blend rates, and GHG displacement credits can directly feed into Scope 1 and Scope 3 emissions inventories — a connection that grows more important as stakeholder expectations and regulatory requirements around environmental disclosure intensify. Organizations using an ISO 14001-compliant Environmental Management System are well-positioned to integrate RFS compliance data into their broader environmental performance tracking.

What to Watch Going Forward

Several developments deserve monitoring as this rule takes effect:

1. Judicial challenges — RFS volume rulemakings have historically attracted litigation from both industry groups and environmental organizations. Monitor the Federal Register and EPA dockets for any stay requests or remand proceedings.

2. EMTS system updates — The EPA's Moderated Transaction System (EMTS) will be updated to reflect the new percentage standards. Confirm your EMTS account settings are accurate before submitting compliance reports.

3. 2027 volume finalization details — The 2027 standards are now finalized, but obligated parties should review the full regulatory text to confirm whether any conditional adjustments (e.g., based on actual 2026 production data) apply to the 2027 percentage standard.

4. Cellulosic waiver credit pricing — EPA typically publishes updated waiver credit prices concurrent with or shortly after the annual volume rule. Confirm current pricing before making procurement decisions.

Summary: Key Takeaways

• The EPA finalized RFS volume requirements for 2026 and 2027 on April 1, 2026, under authority granted by Clean Air Act Section 211(o)(2)(B).
• The rule partially waives the 2025 cellulosic biofuel volume, continuing a pattern of waivers that has persisted since 2010 due to insufficient commercial production.
• Revised percentage standards are now in effect for 2025 (cellulosic), 2026, and 2027 — obligated parties must recalculate their RVOs immediately.
• The 2026 compliance year requirements apply retroactively from January 1, 2026.
• Compliance involves retiring D-code RINs or purchasing EPA waiver credits; the annual deadline is typically March 31 of the following year.

If your organization needs support interpreting how these revised standards affect your specific RVO, RIN strategy, or integrated environmental compliance program, the team at Certify Consulting has the regulatory depth to help — with 200+ clients served and a 100% first-time audit pass rate across complex compliance frameworks.

Last updated: 2026-04-08

Source: U.S. EPA, Federal Register Vol. 91, April 1, 2026 — Docket EPA-HQ-OAR-2025-0218