Congress extends $1B+ biodiesel tax break through 2026

What it does

This bill extends federal tax credits for biodiesel fuels, renewable diesel, and second-generation biofuels by two years (through 2026–2027, depending on the credit type). It also prevents companies from claiming the same credit twice by blocking the older biodiesel credits when a newer clean-fuel production credit (section 45Z) is claimed instead. The primary beneficiaries are biodiesel producers and blenders who can continue to claim tax deductions for fuel sold after December 31, 2024.

Why we flagged it

The bill's operative mechanism is a straightforward extension of existing tax credits for biodiesel and renewable fuel producers. It is not deregulation, not a procedural reform, and not a public-safety measure—it is a targeted tax incentive for a specific fuel sector.

What the text implies

• The anti-double-dipping provisions (denying old credits when section 45Z is claimed) may inadvertently favor larger producers who can navigate multiple credit regimes, while smaller biodiesel makers may face compliance complexity.
• Extension through 2026–2027 locks in tax expenditures without requiring biodiesel producers to demonstrate cost-effectiveness or environmental benefit relative to the subsidy cost.
• The bill does not address whether biodiesel credits remain economically justified as crude oil prices and renewable-fuel mandates evolve.

Section numbers refer to the bill text the analysis read — linked under Primary records below.

Who it affects

The bill extends tax incentives for renewable fuels, which may support domestic biofuel production and energy independence, but the credits are subsidies to a specific industry sector. The anti-double-dipping provisions prevent fraud, but the net public benefit depends on whether the biodiesel industry's tax breaks generate broader economic or environmental returns that exceed their cost to the Treasury.

Who stands to gain

• biodiesel producers
• renewable diesel producers
• second-generation biofuel producers
• fuel blenders claiming mixture credits

Named in the bill

Internal Revenue Code Section 40A, Internal Revenue Code Section 40, Internal Revenue Code Section 45Z, Internal Revenue Code Section 6426, Internal Revenue Code Section 6427, biodiesel industry, renewable diesel industry, second-generation biofuel producers

Where it stands

16 cosponsors: 11 Republicans, 5 Democrats.

• May 1, 2025 — Introduced · Congress.gov: “Introduced in House”
• May 1, 2025 — Referred to House Committee on Ways and Means · Congress.gov: “Referred to the House Committee on Ways and Means”

Dates and quoted wording are Congress.gov's action record; the timeline shows status changes, not every procedural step.

Money around this bill

3 lobbying clients named this bill on 5 disclosure filings across 3 quarters, Dec 2025 to Jun 2026. Those filings disclosed $940,000 in lobbying spend. A filing names 9 bills on average, so that figure is what each filing reported, not a share belonging to this bill.

More lobbying clients named this bill than 61% of bills with at least one filing.

Mike Carey, the sponsor, reported $1,809,017 in PAC receipts in the 2026 cycle.

• American Trucking Associations — $720,000 on 1 filing
• National Energy & Fuels Institute — $170,000 on 3 filings
• Pilot Company — $50,000 on 1 filing

Lobbying Disclosure Act filings through Jul 20, 2026. A filing shows who paid to lobby on a bill it names, not what changed.