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

The UK-based big four spin-off firm has hired Marc Lien, who declared that most AI in professional services today is ‘cosmetic’
Projected revenue losses and exemption requests are harming the project’s capability and viability
HMRC secured lengthy prison sentences in a major payroll VAT fraud case, while law firms announced tax promotions and hires
Significant changes include an update to profit markers and an alteration to how an ‘inbound distributor’ is defined
ITR sat down for a pre-event interview with Tim Zech, WTS Germany, and Jeff Soar, WTS UK, keynote speaker at next week’s ITR AI in Tax Forum 2026 in London
Brazil’s bid to seek US-style exemptions from pillar two is ‘highly advantageous’ for multinationals, ITR has also heard
India is signalling flexibility on expat taxation to attract foreign expertise, though employers will need to navigate disclosure, treaty and scope uncertainties
Brazil is trying to follow in the US’s footsteps and secure its own 'qualified side-by-side status', ITR understands
The surge in probes comes as the UK tax authority seeks to close a VAT gap of £11.4bn from last year, Pinsent Masons’ research has suggested
ITR’s survey data reveals widespread client disappointment with firms’ use of technology but our upcoming AI in Tax event offers advisers a chance to flip the script
Gift this article