Capital Gains Tax Calculator: Estimate Your Tax Bill

Capital gains tax applies when you sell investments for more than you paid. But calculating your actual liability involves the annual exempt amount, your income tax band, and different rates for different asset types.

This calculator estimates your CGT bill based on current UK rates. Enter your gain, select your tax band, and see how much you'll owe — plus how much of your annual exempt amount you've used.

Use it for tax planning: model selling in different tax years, splitting gains between spouses, or using your annual allowance strategically before year-end.