The complete guide
The UK’s proposed “exit tax” — a potential 20% levy on unrealized gains for individuals leaving the country — represents one of the most significant shifts in the nation’s tax landscape in recent years. This proposed measure aims to tax wealth before it leaves the UK, affecting shares, business ownership, and investments even where no sale has occurred.
Paradigm Shift
Historically, the UK’s appeal to international investors and high-net-worth individuals (HNWIs) rested heavily on its advantageous non-domiciled (non-dom) tax regime. For over 200 years, non-dom residents could live in Britain while being taxed only on UK-sourced income, with foreign income taxable only if brought into the UK. This UK tax regime provided a powerful incentive for global wealth to base itself in London.
However, as of April 2025, this landscape has fundamentally changed. The abolishment of the non-dom regime and the end of the remittance basis mark a decisive shift in UK tax policy. Under the new residence-based system, all UK residents are taxed on worldwide income and gains as they arise. While the Foreign Income and Gains (FIG) regime offers a limited four-year exemption for new arrivals who have been non-resident for at least ten years, the long-term flexibility and planning advantages of the previous system have been lost.
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This dual shift—the proposed UK exit tax and the end of the non-dom regime—has accelerated a broader trend: the relocation of global wealth. With increasing uncertainty, higher fiscal exposure, and diminishing planning tools in the UK, many investors are reassessing their options.
