Deloitte, the world's largest accounting firm, helped falsify financial documents to conceal $672 million in assets belonging to Roman Abramovich, BBC Panorama has found. The scheme, which experts are calling "straightforward" tax evasion, ran for nearly two decades and involved backdated paperwork, offshore companies, and some of the most expensive luxury goods on earth: superyachts, private jets, and mansions that simply disappeared from the oligarch's company accounts.

The findings come from a leak of more than 500,000 documents, analysed by the BBC, the Guardian, the Bureau of Investigative Journalism, and other partners as part of the International Consortium of Investigative Journalists' Cyprus Confidential investigation.

How the vanishing act worked

The mechanics were not subtle. Abramovich's fortune, built from a controversial acquisition of Siberian oilfields during the chaotic post-Soviet privatisation era, flowed through a network of offshore companies administered in Cyprus. One of those companies, Kravin Investments, received a $3 billion windfall in 2003. About $2 billion of that sat in accounts accruing interest that was, in theory, taxable in Cyprus.

Rather than pay it, financial advisers began devising plans to "eliminate" the tax liability. When Cyprus passed a new transparency law in 2006 requiring company accounts to be made public, Deloitte Cyprus moved quickly. Draft accounts for 2003 had already been prepared for Abramovich's Cypriot company Amiscan Investments, and those accounts showed $672 million in luxury assets. The solution, according to the leaked documents, was to change them. The assets vanished.

Demetris Ioannides, who chaired Deloitte Cyprus before spinning out his own firm, Meritservus, wrote in an August 2005 email that "it will be necessary to change the financial statements and the accounting records accordingly for 2003 and 2004." The following month, a Deloitte Cyprus partner appeared to agree in a separate email copied to staff at Meritservus and Abramovich's investment vehicle, Millhouse.

Barrister Andrew Mitchell KC, an expert in financial services law, told Panorama the evidence showed the scheme was "straightforward" tax evasion. "It couldn't be more blatant," he said.

Who says what

Abramovich's lawyers deny he evaded tax or concealed his fortune. They say Panorama provided no evidence he knew about, authorised, or directed the falsification of any document, and that it was legitimate to rely on advice from professionals. Eugene Tenenbaum, described as Abramovich's closest aide and a London-based figure who appears in the documents, also denied wrongdoing, saying he relied on specialist advice from Deloitte Cyprus.

Deloitte Cyprus said it "acts in compliance with all applicable laws" and that it can no longer access the relevant material because of how much time has passed.

In Jersey, £5.4 billion of Abramovich's assets remain frozen and a criminal investigation has been running for four years. Abramovich's lawyers told the BBC that investigation was "undertaken for political purposes."

Why this matters beyond the oligarch

The story is not only about one very rich man. It is about the infrastructure that makes this kind of wealth concealment possible. Deloitte is not a shadowy offshore operator. It is one of the four firms that dominate global accounting, auditing the books of major corporations and institutions across the world. If a firm that size can spend years signing off on falsified accounts for a sanctioned oligarch, the structural question is obvious: how many similar arrangements exist across the industry, and who is actually checking?

Meritservus, the firm that emerged from Deloitte's Cyprus operation and served Abramovich for nearly 20 years, was itself sanctioned by the UK in 2023 for helping Russian oligarchs hide their wealth. Ioannides was sanctioned alongside it.

Abramovich has been reported to be living in Turkey, which did not apply Western sanctions.