Antoine Deltour: LuxLeaks whistleblower speaks out

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


Antoine Deltour: LuxLeaks whistleblower speaks out

Deltour-Antoine-c

Antoine Deltour, one of the two whistleblowers at the centre of the LuxLeaks scandal, said that he had “mixed feelings” after his conviction for leaking confidential information was upheld, but his sentence was reduced.

Luxembourg’s Cite Judiciare upheld an earlier judgment against the former PwC employee, as well as his ex-colleague Raphaël Halet , but reduced Deltour’s 12-month suspended prison sentence to six months.

“There was a lot of support outside the court. It is a partial victory that for the first time in Europe that a national judge recognised the whistleblower status for revealing professional secrecy, but a satisfying judgment would have been a full acquittal,” Deltour told International Tax Review.

The Frenchman also revealed to International Tax Review that he is considering appealing the decision.

“I need time to read carefully the judgment and then I will make a decision,” he said. “The last possibility [is] to contest the judgement and it will allow me to go to the European Court of Human Rights, but I haven’t made a decision yet.”

Despite the fact that he was convicted, Deltour is optimistic that his case will have a positive impact and bring greater tax transparency in the future.

“It’s a step forward to whistleblowers in Europe, as my lawyer said it is the first time a European judge recognised whistleblower statues . I think it is step forward for tax justice.”

“Unfortunately, the first trial and the appeal trial gave a lot of attention to the messenger and not to the message, which is about tax competition in Europe and how it is more or a little more transparent thanks to the leak. Tax competition is more intense than ever with the decreasing corporate tax rates everywhere in Europe and I think that is having consequences on budgets and public policing.”

“Today’s decision is a recognition of my role in this story,” he added.

more across site & shared bottom lb ros

More from across our site

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
As global capability centres use AI to deliver services, MNEs face a fresh wave of PE and TP exposure that their existing playbooks weren't built for
The deal for Comtax hands Ryan immediate scale in Brazil, with a near-70-strong team serving clients from São Paulo
The arrivals of Julio Castro and Adam Blakemore mean the firm has added six tax partners to its global practice since the start of 2025
Tax authorities have gained unprecedented transparency through CbCR, but a new study suggests they may not be looking in the right places
The future chief tax officer will be judged not only on compliance, but on their ability to harness data, technology and AI to support strategic decision-making
More than 200 tier promotions reshaped this year's European rankings as several international firms strengthened their positions in key tax markets
Ryosuke Takemura, OECD policy adviser, countered that the organisation’s role is ‘not to solve these issues one by one’ but to prevent tax disputes in general
Awards
ITR is delighted to reveal all the shortlisted nominees for the 2026 Asia-Pacific Tax Awards
Monica Erasmus-Koen and her Taxtimbre team will be responsible for building the firm’s TP capability in the competitive Netherlands market
Gift this article