Capital Gains Tax Calculator 2024/25. Cgt is calculated on your taxable income. The tax that you have taken from the profit which you have gained from selling or disposing of an asset that has increased in value is called capital.

Use our capital gains tax calculator to work out what tax you owe on your investment profits. For the 2024 to 2025 tax year the allowance is £3,000, which leaves £9,600 to pay tax on.