Trump’s biofuel goals face challenge as US plants lag EPA production targets

Summary

U.S. biodiesel and renewable diesel producers are operating below the pace required to meet the Environmental Protection Agency’s record 2026 biomass-based diesel blending mandates. Slower production, tighter feedstock availability and declining renewable fuel credit inventories are increasing compliance costs for refiners while testing the Trump administration’s efforts to boost domestic biofuel production and support U.S. farmers.

NEW YORK, July 2, 2026 — President Donald Trump’s effort to increase production of bio-based diesel and deliver on promises to farmers and rural communities is running into a market reality: U.S. biodiesel and renewable diesel plants are not producing enough fuel to keep pace with the Environmental Protection Agency’s ambitious blending requirements for 2026.

The production gap is creating challenges across the renewable fuel market. Refiners that must comply with the Renewable Fuel Standard (RFS) are increasingly relying on previously accumulated Renewable Identification Number (RIN) credits, while analysts warn that continued production shortfalls could tighten credit supplies and raise compliance costs later this year.

The situation also presents a political balancing act for the administration. Strong biofuel mandates have been welcomed by farmers and biofuel producers, but refiners argue that higher obligations become more expensive when domestic fuel production fails to keep pace.

Production lags behind EPA targets

The EPA’s final Renewable Fuel Standard rule for 2026 established the highest-ever biomass-based diesel requirements, requiring obligated parties to generate or acquire 7.12 billion D4 Renewable Identification Numbers (RINs).

That obligation is expected to translate into roughly 5.61 billion gallons of biodiesel and renewable diesel after accounting for the agency’s partial reallocation of exempted blending volumes from small refineries.

Industry data, however, shows production is falling short of the pace required to meet those targets.

According to Argus Media, U.S. biodiesel plants operated at about 77% of capacity in May, while renewable diesel facilities averaged approximately 78% capacity utilization.

Some domestic production has also been exported to overseas markets. Because exported biofuels are not eligible to generate Renewable Identification Numbers under the Renewable Fuel Standard, those shipments reduce the supply of compliance credits available within the United States.

Credit shortfall continues to grow

EPA data indicates producers generated 736 million D4 RINs during May, below the pace required to remain on track for the annual compliance target.

Scott Irwin, an agricultural economist at the University of Illinois, estimates the industry accumulated a 1.41 billion D4 RIN deficit during the first four months of 2026.

Irwin said producers would need to achieve record production levels for the remainder of the year to eliminate the deficit, something he considers unlikely under current market conditions.

If production remains below expectations, refiners may increasingly rely on the industry’s bank of carryover RIN credits to satisfy federal compliance obligations.

Feedstock availability adds pressure

The production slowdown has also been influenced by changes surrounding the federal Section 45Z Clean Fuel Production Credit, which generally limits eligibility for tax incentives to fuels produced using feedstocks sourced from the United States, Canada or Mexico.

Industry participants say the new rules have reduced access to some lower-cost imported feedstocks, increasing costs for biodiesel and renewable diesel producers.

Earlier this week, the U.S. Department of Agriculture released long-awaited technical guidance intended to help farmers and biofuel producers qualify for Section 45Z tax credits by measuring greenhouse gas emissions associated with agricultural practices.

The guidance is expected to provide greater certainty for producers, although analysts say it is unlikely to significantly boost production in time to close this year’s supply gap.

Refiners face rising compliance costs

As production remains below required levels, refiners are drawing down previously accumulated Renewable Identification Numbers to meet federal blending obligations.

Paul Niznik, director of energy at Capstone LLC, said he does not expect the EPA to lower its renewable fuel requirements despite the current production challenges.

Meanwhile, refining companies and industry groups continue to argue that higher renewable fuel mandates increase compliance costs, while farm organizations and biofuel producers say stronger blending requirements are essential for supporting rural economies and expanding domestic demand for agricultural products.

The outcome will determine whether the industry can satisfy the EPA’s record biofuel targets without exhausting its existing stockpile of renewable fuel credits or significantly increasing compliance costs for refiners.

Why this matters

• Record biofuel requirements: The EPA has established its highest-ever biomass-based diesel obligations for 2026, increasing demand for biodiesel and renewable diesel production across the United States.
• Shrinking RIN inventories: Lower-than-expected production is forcing refiners to rely more heavily on previously banked Renewable Identification Numbers, reducing the industry’s compliance cushion.
• Feedstock constraints: Section 45Z tax credit rules favor North American feedstocks, limiting access to some imported raw materials and adding cost pressure for biofuel producers.
• Impact on farmers and refiners: Higher renewable fuel mandates are intended to support U.S. agriculture and domestic biofuel production, but slower output could increase compliance costs for refiners and create uncertainty across energy markets.

FAQs

Q1: What is the main challenge facing the Trump administration’s biofuel goals?

U.S. biodiesel and renewable diesel plants are producing below the pace needed to meet the EPA’s record 2026 biomass-based diesel blending requirements. The production gap has increased reliance on Renewable Identification Number (RIN) credits and raised concerns about higher compliance costs for refiners.

Q2: What are D4 Renewable Identification Numbers (RINs)?

D4 RINs are renewable fuel credits generated from biomass-based diesel under the Renewable Fuel Standard. Refiners and fuel importers use these credits to demonstrate compliance with federal biofuel blending requirements.

Q3: Why are biodiesel producers struggling to meet production targets?

Industry analysts point to lower plant utilization, tighter feedstock availability and ongoing adjustments to federal clean fuel tax credit rules as factors limiting production growth.

Q4: What is Section 45Z?

Section 45Z is the federal Clean Fuel Production Credit, which provides tax incentives for qualifying low-carbon transportation fuels. The program generally requires eligible feedstocks to originate from the United States, Canada or Mexico.

Q5: How large is the current renewable fuel credit shortfall?

According to University of Illinois agricultural economist Scott Irwin, the industry accumulated an estimated 1.41 billion D4 RIN deficit during the first four months of 2026.