UK wealth tax debates intensify as billionaires relocate

The United Kingdom is facing a shift in its tax landscape as wealthy residents relocate to avoid changing tax treatments. Notably, Chris Rokos, once the UK’s third largest individual taxpayer, is moving his tax residency to Greece, where he will face a flat €100,000 annual charge on foreign income.

While a group of 120 UK millionaires has advocated for a 2% annual wealth tax on assets exceeding £10 million, experts have raised concerns regarding its feasibility. The Wealth Tax Commission previously suggested that annual wealth taxes are difficult to administer and prone to behavioral responses, such as emigration. Instead, they recommended one-off levies or structural reforms to existing systems.

This trend of mobile capital has broader implications for other regions. In the United States, California is considering Proposition 40, a proposal for a one-time 5% tax on the net worth of qualifying billionaires. The British experience, where approximately £121 billion in wealth has become less associated with the country since 2024 following non-domiciled tax reforms, serves as a case study for governments attempting to tax concentrated wealth without driving away investors and entrepreneurs.