Capital Gains Tax Calculator (UK 2025/26)
CGT on shares, crypto and property at the 18% and 24% rates.
✓ 2025/26 rates & £3,000 allowance · updated June 2026
£15,270 taxed at 18% (within your unused basic-rate band of £15,270) and £1,730 at 24%. 2025/26 rules — the £3,000 annual exempt amount and 18%/24% rates apply to disposals from 30 October 2024.
Results are estimates for information only, not financial advice. See how we build and verify our calculators.
Enter your total gain and your taxable income to work out UK capital gains tax for 2025/26. The calculator deducts the £3,000 annual exempt amount, fills your unused basic-rate band at 18%, and taxes the rest at 24% — the rates that have applied to all assets (shares, funds, crypto and property alike) since 30 October 2024.
How to use the Capital Gains Tax Calculator
- Enter your total capital gain for the year (sale proceeds minus costs).
- Enter your taxable income (salary etc.) — it determines how much gain is taxed at 18% vs 24%.
- Read your CGT bill and after-tax gain.
Frequently asked questions
What is the CGT allowance for 2025/26?
£3,000 per person per year (the annual exempt amount). Gains within it are tax-free; couples can use both allowances by holding assets jointly.
What are the CGT rates now?
18% for gains within your unused basic-rate band and 24% above it — the same rates for all asset types since 30 October 2024, including residential property.
What's exempt from CGT?
Your main home (private residence relief), ISAs and pensions, gifts to a spouse, personal possessions sold under £6,000, and your car. Crypto is NOT exempt — disposals are taxable like shares.