Congress extends $1B+ biodiesel subsidy through 2029, narrowly benefiting fuel producers.

What it does

This bill extends federal tax credits for biodiesel and renewable diesel fuel through 2029 (currently set to expire after 2024), and adds a rule preventing companies from claiming both the biodiesel credit and a separate clean-fuel credit (section 45Z) on the same fuel. The extension benefits biodiesel and renewable diesel producers and blenders by preserving their tax incentives for five additional years.

Why we flagged it

The bill's operative mechanism is a straightforward extension of existing tax credits for biodiesel and renewable diesel producers. The anti-double-benefit rule is a technical safeguard, not the primary purpose. The bill is functionally a targeted tax expenditure renewal for a specific fuel industry.

What the text implies

• The 2029 expiration date creates a new cliff for biodiesel producers; absent further legislative action, credits will lapse again, creating cyclical uncertainty in the renewable diesel market.
• The anti-double-benefit rule (new §40A(g)) prevents fuel from qualifying for both the traditional biodiesel credit AND the newer clean-fuel credit under 45Z, potentially steering producers toward one incentive pathway over another depending on fuel composition and use.
• Five-year extension represents approximately $1–2 billion in foregone federal revenue (based on historical biodiesel credit costs), reducing funds available for other priorities or deficit reduction.

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

Who it affects

Citizens benefit from extended renewable fuel incentives that may lower fuel costs and support domestic energy production, but the primary beneficiaries are biodiesel producers and blenders (a narrow industry), not the general public. The anti-double-benefit rule is sound policy (preventing subsidy stacking), but the core mechanism is a targeted tax expenditure—foregone federal revenue—that flows to a specific sector rather than a broad public good.

Who stands to gain

• biodiesel producers
• renewable diesel producers
• fuel blenders
• agricultural feedstock suppliers

Named in the bill

Internal Revenue Code of 1986, Section 40A (biodiesel fuel credit), Section 45Z (clean fuel production credit), Section 6426 (excise tax credit for fuels), Section 6427 (fuel tax payments), biodiesel industry, renewable diesel industry

Where it stands

17 cosponsors: 12 Republicans, 5 Democrats.

• Apr 27, 2026 — Introduced · Congress.gov: “Introduced in House”
• Apr 27, 2026 — 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

6 lobbying clients named this bill on 6 disclosure filings across 1 quarter, Jun 2026 to Jun 2026. Those filings disclosed $1,120,000 in lobbying spend. A filing names 10 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 82% 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
• Pilot Travel Centers LLC — $160,000 on 1 filing
• National Association of Convenience Stores — $110,000 on 1 filing
• Pilot Travel Centers, LLC — $50,000 on 1 filing
• Racetrac, Inc. — $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.