Programs › United States — federal (nationwide)

Section 45Z Clean Fuel Production Credit

activeUS Federalfederaltax creditRenewable natural gas (RNG)

ValueUp to $1.00/gal (transport fuel, with prevailing wage/apprenticeship; base $0.20/gal) x emissions factor; OBBBA (7/4/2025) cut SAF premium from $1.75 to $1.00/gal for fuel produced after 12/31/2025 and extended credit through 2029

Deadlines2029-12-31 — Applies to clean fuel produced 1/1/2025 through 12/31/2029 (OBBBA 2-year extension)

RequirementsProducer registered on IRS Form 637 (Activity Letter CN for non-SAF, CA for SAF) before production; fuel produced at qualifying US facility and sold; lifecycle emissions below threshold per emissions rate table; feedstocks must be sourced from US/Mexico/Canada for fuel produced after 12/31/2025; claim on Form 7218

Caveatsproposed regs (REG-121244-23) issued 2/3/2026 implementing OBBBA changes; public hearing held May 2026; final regs targeted ~Nov 2026 per Unified Agenda; credit covers fuel sold 1/1/2025-12/31/2029; post-2025 fuel must use US/Mexico/Canada feedstocks; Form 637 registration required before claiming

Official sourcehttps://www.irs.gov/credits-deductions/clean-fuel-production-credit

Last verified2026-08-12

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