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Capital Gains Tax Allowance 2026: Changes & History | UK

Updated: 20 May 2026

Introduction to Capital Gains Tax Allowance

The capital gains tax allowance, also known as the CGT exempt amount or CGT annual allowance, is the amount of gains that can be made from the sale of assets before capital gains tax (CGT) becomes payable. In the United Kingdom, this allowance has undergone significant changes over the years, and it is essential to understand these changes to navigate the complex world of taxation.

Historical Changes to the CGT Exempt Amount

The CGT exempt amount has fluctuated over the years, with notable changes in 2008, 2010, and 2020. Prior to 2008, the CGT exempt amount was £9,200. However, in the 2008-09 tax year, the allowance increased to £9,600. The following year, it rose to £10,100. The exemption amount continued to rise, reaching £11,700 in 2018-19. In the 2020-21 tax year, the CGT exempt amount was £12,000, and it has remained at this level, with a slight increase to £12,300 in the 2022-23 tax year and £12,600 in the 2023-24 tax year, but for the 2026 tax year, the CGT annual allowance will be £6,000 for basic-rate taxpayers and £6,000 for higher and additional-rate taxpayers, but a new regime will be applied where only the first £6,000 of gains are CGT-free for all taxpayers.

CGT Annual Allowance for 2026

For the 2026 tax year, the CGT annual allowance will be significantly reduced. The government has introduced a new regime where only the first £6,000 of gains will be CGT-free for all taxpayers. This change is expected to impact many individuals who have previously relied on the higher CGT exempt amount to manage their tax liabilities.

Impact of the Reduced CGT Exempt Amount

The reduction in the CGT exempt amount is likely to have far-reaching consequences for taxpayers in the United Kingdom. Those who have significant gains from the sale of assets, such as property or investments, may find themselves facing a larger tax bill. It is essential for individuals to plan carefully and consider seeking professional advice to minimize their tax liabilities.

Tax Planning Strategies

In light of the reduced CGT exempt amount, taxpayers may need to adopt new tax planning strategies. One approach could be to consider realizing gains over several tax years, rather than in a single year, to maximize the use of the CGT annual allowance. Additionally, individuals may want to explore other tax-efficient options, such as gifting assets to spouses or using tax-free wrappers like ISAs.

What to Expect Going Forward

As the UK tax landscape continues to evolve, it is crucial to stay informed about future changes to the capital gains tax allowance. The government may introduce further reforms or adjustments to the CGT exempt amount, and taxpayers must be prepared to adapt their tax planning strategies accordingly. For the 2026 tax year, the reduced CGT annual allowance will require careful planning and consideration of tax liabilities.

Future Reforms and Adjustments

While it is difficult to predict with certainty what future changes may be made to the CGT exempt amount, it is likely that the government will continue to review and refine the tax system. Taxpayers should remain vigilant and monitor announcements from HMRC and the UK government to stay up-to-date with the latest developments.

Conclusion

The capital gains tax allowance has undergone significant changes over the years, and the reduction in the CGT exempt amount for the 2026 tax year will have a notable impact on taxpayers. By understanding the historical context and the current regime, individuals can better navigate the complex world of taxation and make informed decisions about their financial planning. As the UK tax landscape continues to evolve, it is essential to stay informed and adapt to changes to the CGT annual allowance to minimize tax liabilities and maximize savings.