The surge in tax intake coincides with an all-time high of 584,000 CGT taxpayers, a 45 per cent increase year-on-year. According to David Little of Evelyn Partners, investors moved to crystallize gains ahead of the October 2024 Budget, fearing that the government would align capital gains rates more closely with income tax bands. This rush to sell was compounded by consecutive cuts to the Annual Exempt Amount, which dropped from £12,300 to £3,000, pulling 163,000 additional taxpayers into the tax net.
UK Capital Gains Tax Surge Driven by Investor Sell-Off
A record £24.2 billion in capital gains tax liabilities was collected by HM Revenue and Customs in the 2024/2025 tax year, an 89 per cent jump from the previous year. The spike reflects a mass investor sell-off triggered by anticipation of rising tax rates and shrinking annual exemptions.
The Risk of Future Fiscal Policy
With the Treasury facing pressure to address public debt, speculation persists regarding further tax alignment. Knight Frank analysts warn that raising the top CGT rate from 24 per cent to 45 per cent could trigger significant capital flight. Liam Bailey, global head of research at the firm, noted that such shifts carry high behavioral uncertainty, with the Office for Budget Responsibility cautioning that a heavy reliance on a small, mobile group of wealthy taxpayers introduces substantial fiscal risk to the UK's long-term economic strategy.
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