Robert Gaines-Cooper, the Seychelles-based UK multi-millionaire in a long-running battle with HMRC, has won the right to appeal to the Supreme Court.
Thousands of UK tax exiles could find themselves chased for backdated tax if he loses his case, the Telegraph reports.
The entrepreneur left Britain in 1976 but is being pursued for tax backdated to 1982.
Appeal Court judges ruled against him in February but Gaines-Cooper says he wants to fight on because the case raises important issues of clarity, consistency and fairness that are relevant to all taxpayers.
Gaines-Cooper, 72, says he is not trying to evade tax and his companies pay tax in 16 countries, including the UK and US, Canada, Italy, Australia, Singapore, Germany, Spain, South Africa and Japan.
He says since leaving the UK he has obeyed the rule which gives non-resident status and tax benefits to anyone who spends no more than 90 days a year in the country.
However, Appeal Court judges ruled that because Gaines-Cooper retained significant ties to Britain, HMRC was justified in denying him non-resident tax status and pursuing him for backdated tax on the grounds he was still officially resident.
HMRC said at the time the Appeal Court's decision would "ensure all those who are resident in the UK pay the tax that is due".
It is expected to fight for the appeal judgment to be upheld.
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