US Tax Court rules that UK windfall tax is creditable

International Tax Review is part of Legal Benchmarking Limited, 1-2 Paris Garden, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement


US Tax Court rules that UK windfall tax is creditable

Two taxpayers have each won separate, but related, cases in the US Tax Court on whether the UK windfall tax is creditable for US federal tax purposes.

Two taxpayers have each won separate, but related, cases in the US Tax Court on whether the UK windfall tax is creditable for US federal tax purposes.

In 1979, the UK government began to privatise many state-owned companies. In private hands, the companies grew strongly and earned large profits. The Labour Party came to power in 1997, and Parliament approved its plan for a windfall tax in July of that year, imposing the charge on 32 privatised companies in the UK. The IRS position was that the windfall tax on US subsidiaries in the UK was not an income tax and not a creditable foreign tax for US tax purposes. They denied PPL's claim for a refund of $786,804 from its 1997 federal tax bill. The refund also related to a dividend distribution from the company's UK subsidiary, which the parent company repaid after it was rescinded.

In his decision in PPL Corp vs Commissioner on September 9, Judge Halpern determined that the foreign tax does qualify as a creditable tax in accordance with section 901(a) of the Internal Revenue Code. The judge cited section 1.901-2 (a), which he said rejects the IRS's view that the court could not consider anything other than the text of the windfall tax statute when determining whether the foreign tax qualifies as an income tax. The decision in Entergy Corp vs Commissioner followed as a memorandum and directly referred to the legal reasoning in PPL Corp. Entergy's UK subsidiary was called London Electricity, PPL's was South Western Electricity.

Partners Stephen Gardner and William O'Brien of Cooley Godward Kronish represented Entergy. Partners Richard May, Mark Bierbower and associate Timothy Jacobs of Hunton & Williams represented PPL. Hunton & Williams declined to comment on the case.

"It is the nature of the UK tax which is unique," said Gardner. "The nature of the UK statute and the statute's language created some issue of whether or not it was an income tax."

The court's decision to consider factors other than just the text of the statute has significant implications for the international tax community.

"The court's endorsement of a broad scope of interpretation in both cases is important for any taxpayer involved in foreign activities," said Gardner.

more across site & shared bottom lb ros

More from across our site

The big four firm is rightfully prioritising transparency and accountability as it seeks to rebuild from its scandal, but a glaring structural issue remains
A recent hiring flurry has taken the firm’s number of partner appointments this year to 121 and put it on track to hit 160 partner target early
The move brings specialist tax and litigation capability to EY as it seeks to close the gap on Baker McKenzie and Venezuela’s leading local firms
The industry’s response to AI requires an unfamiliar ingredient as firms battle to shape their futures
The ambitious big four challenger firm has also appointed ex-RSM partner Brad Ashton to build out its customs and global trade practice
The big four firm allegedly reviewed backdated documents and signed off on accounts that removed hundreds of millions of dollars of Abramovich’s assets
New Tier 1 entrants and an expanding cohort of established players indicate that law firms are becoming increasingly credible challengers in Europe's TP market
Awards
Leading firms and individuals gathered in Dubai to celebrate standout legal, dealmaking and tax work across the region
Tax authorities want more revenue, have better tools to find it and are increasingly willing to fight for it
Audifina, the sixth-largest firm of its kind in Lithuania, will bring a 90-strong team with offices in Vilnius and Kaunas to RSM’s international platform
Gift this article