UK Capital Gains Tax Calculator
Estimate UK Capital Gains Tax on shares or a second property after the annual exempt amount, at basic and higher rates.
Capital Gains Tax due
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Taxable gain —
Rate applied —
Verify the current annual exempt amount and rates at gov.uk — both have changed significantly in recent Budgets.
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How it works
Taxable gain = gain − annual exempt amount; tax at basic (10%/18%) or higher (20%/24%) rateFrequently Asked Questions
How is Capital Gains Tax calculated in the UK?
Subtract your annual tax-free exempt amount (a few thousand pounds — verify the current figure, as it has fallen sharply in recent years) from your total gain, then tax the remainder at 10% (basic-rate taxpayers, shares) or 20% (higher-rate), with residential property taxed higher at 18%/24%.
What is the CGT annual exempt amount?
A tax-free allowance for gains each year, applied before any CGT is owed. It has been cut substantially in recent Budgets — always check the current-year figure at gov.uk before relying on an estimate.
Does CGT apply to my main home?
No — Private Residence Relief generally exempts gains on your only or main home. CGT mainly applies to second properties, buy-to-lets, shares outside an ISA, and other investment assets.