UK Capital Gains Tax Calculator
Estimate your UK Capital Gains Tax after the annual exempt amount, based on how much of your basic rate band remains.
Capital Gains Tax
£2,418.00
- Taxable gain (after allowance)
- £12,000.00
- Tax year
- 2025/26
Assumptions
- Uses the standard (non-property) CGT rates — residential property gains are taxed at different rates
- Does not model Business Asset Disposal Relief or other reliefs
How it's calculated
Taxable gain = gain − annual exempt amount. Taxed at the basic rate up to any remaining basic rate band, then at the higher rate above it.
Worked example
A £15,000 gain on top of £30,000 of other income is taxed after the annual exempt amount, shown live above.
Frequently asked questions
Does this apply to selling a second property?
No — residential property gains are taxed at different rates. This calculator covers standard (non-property) assets like shares.