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TREAS/IRS RIN: 1545-BR77 Publication ID: 2026 
Title: ●Guidance Related to a United States Shareholder's Pro Rata Share of Subpart F Income and Net CFC Tested Income Under ยงยง 951(a) and 951A. 
Abstract:

Regulations will propose to implement the amendments made to §951(a) and §951A by section 70354 of the One, Big, Beautiful Bill Act (OBBBA) for determining a U.S. shareholder’s pro rata share of a CFC’s subpart F income and Net CFC Tested Income. The regulations will also address the transition rule in section 70354(c)(2) of the OBBBA.

 
Agency: Department of the Treasury(TREAS)  Priority: Other Significant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
EO 14192 Designation: Regulatory 
CFR Citation: 26 CFR 1.951-1 (revision)   
Legal Authority: Pub. L. 119-21, sec. 70354    26 U.S.C. 7805(a)   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  07/00/2026 
Additional Information: REG-115646-25 (NPRM) Drafter attorney: James Kostura (202) 317-3643 Reviewing attorney: Dylan Steiner (202) 317-5477 Treasury attorneys; Brenda Zent (202) 622-6894 and Natalie Punchak (202) 622-1479 INTL
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: None 
Federalism: No 
Included in the Regulatory Plan: No 
International Impacts: This regulatory action will be likely to have international trade and investment effects, or otherwise be of international interest.
RIN Data Printed in the FR: No 
Agency Contact:
James R. Kostura
Attorney
Department of the Treasury
Internal Revenue Service
1111 Constitution Avenue NW , Room 4579,
Washington, DC 20224
Phone:202 317-3643
Fax:855 584-5146
Email: james.r.kostura@irscounsel.treas.gov