Title 26 › Subtitle A — Income Taxes › CHAPTER 1 — NORMAL TAXES AND SURTAXES › Subchapter A — Determination of Tax Liability › PART IV — CREDITS AGAINST TAX › Subpart D — Business Related Credits › § 40B
Gives a tax credit for each gallon of sustainable aviation fuel sold or used in a taxable year. The credit equals the number of gallons times $1.25 plus an extra amount. The extra amount is $0.01 for every percentage point the fuel’s lifecycle greenhouse gas (GHG) reduction is above 50%, but that extra cannot be more than $0.50 (so the credit per gallon cannot exceed $1.75). The fuel must be mixed with kerosene, made in the United States, used or sold for aircraft in the seller’s normal business, and put into the aircraft tank in the United States. “Sustainable aviation fuel” must meet ASTM D7566 or the Fischer–Tropsch part of ASTM D1655 Annex A1, not come from co-processing with non-biomass feedstock, not be made from palm fatty acid distillates or petroleum, and be certified to cut lifecycle GHGs by at least 50%. “Applicable material” means certain fats and esters; “biomass” has the meaning in section 45K(c)(3). The GHG reduction is measured by the latest ICAO CORSIA method agreed with the U.S. or a similar Clean Air Act method. Producers or importers must be registered under section 4101 and give outside certification and other information as required. The credit is reduced if the fuel already got a benefit under sections 6426 or 6427(e). No credit applies to sales or uses after December 31, 2024.
Full Legal Text
Internal Revenue Code, Source: USLM XML via OLRC
Legislative History
Reference
Citation
26 U.S.C. § 40B
Title 26, Internal Revenue Code
Last Updated
Sep 22, 2026
Release point: 119-110