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IRS Newswire




February 3, 2026





Issue Number:    IR-2026-20

Inside This Issue
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*Treasury, IRS issue proposed regulations on the clean fuel production credit under the One, Big, Beautiful Bill *

IR-2026-20, Feb. 3, 2026

WASHINGTON* —* The Department of the Treasury and the Internal Revenue Service today issued proposed regulations [ [link removed] ] for domestic producers of clean transportation fuel to determine their eligibility for and calculate the clean fuel production credit under the One, Big, Beautiful Bill. The new law made important changes to what is often referred to as the 45Z credit.

The clean fuel production credit [ [link removed] ] provides businesses an income tax credit for clean transportation fuel produced domestically after Dec. 31, 2024, and sold by Dec. 31, 2029. To claim the credit, taxpayers must be registered with the IRS using Form 637, Application for Registration (For Certain Excise Tax Activities) [ [link removed] ] at the time of production.

The proposed regulations provide guidance on the determination of clean fuel production credits, emissions rates, and certification and registration requirements. They provide further certainty and clarity for taxpayers and address key issues raised by stakeholders.

*What’s new under the OBBB*

Today’s guidance also proposes rules to implement certain OBBB changes to the clean fuel production credit. OBBB changed the clean fuel production credit to:


* Extend the credit to Dec. 31, 2029;
* Limit feedstocks to those grown or produced in the US, Mexico, or Canada;
* Add prohibited foreign entity restrictions;
* Broaden sale attribution for fuel sold through related intermediaries;
* Eliminate the special rate for sustainable aviation fuel;
* Add an anti-abuse provision to prevent double crediting;
* Prohibit negative emissions rates except for fuels derived from animal manure;
* Require feedstock-specific emissions rates for fuels derived from animal manure; and
* Exclude indirect land use changes from emissions rates.

*Treasury and IRS invite public comments *

Treasury and IRS welcome comments and requests to speak at the public hearing on these proposed regulations. Commenters are encouraged to use the Federal e-Rulemaking portal [ [link removed] ] to submit comments (indicate “IRS” and “REG-121244-23”). A public hearing has been scheduled as described in the “Comments and Public Hearing” section. Paper submissions should be sent to: CC:PA:01:PR (REG-121244-23), Room 5503, Internal Revenue Service, P.O. Box 7604, Ben Franklin Station, Washington, DC 20044. 

For more information, see One, Big, Beautiful Bill Provisions [ [link removed] ] on IRS.gov.

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