This page estimates UK Capital Gains Tax on any chargeable asset for the 2025-26 tax year. The Capital Gains Tax annual exempt amount for 2025-26 is £3,000 per person. This page shows how much gain you can realise tax-free and what the tax is once you go above the allowance. The calculator above is pre-filled with a realistic example and you can change every figure.
Worked example
On a £8,000 gain with £25,000 of other taxable income, CGT is £900 — £900 at 18% on the £5,000 sitting in the basic-rate band, after the £3,000 allowance.
| Step | Amount |
|---|---|
| Capital gain | £8,000 |
| Less £3,000 annual exempt amount | −£3,000 |
| Taxable gain | £5,000 |
| Taxed at 18% (within basic-rate band) | £5,000 → £900 |
| Taxed at 24% (above basic-rate band) | £0 → £0 |
| CGT due | £900 |
| Net after CGT | £7,100 |
| Effective rate on the gain | 11.3% |
The £3,000 annual exempt amount cannot be carried forward — if you do not use it in the tax year, it is lost. Each individual gets their own £3,000, so a couple holding an asset jointly has a combined £6,000. Most trusts get half the individual amount (£1,500 in 2025-26).
CGT rates & allowance — 2025-26
| Item | 2025-26 figure |
|---|---|
| Annual exempt amount (individuals) | £3,000 |
| Annual exempt amount (most trusts) | £1,500 |
| Main rate — gains within unused basic-rate band | 18% |
| Main rate — gains above basic-rate band | 24% |
| Residential property — basic / higher | 18% / 24% |
| Trustees & personal representatives | 24% |
| Business Asset Disposal Relief | 14% (lifetime limit £1,000,000) |
| Basic-rate band split point (taxable income) | £37,700 |
The main 18% / 24% rates apply to all chargeable assets for disposals on or after 30 October 2024, so they cover the whole 2025-26 tax year. Your gain is stacked on top of your taxable income: the part still within the £37,700 basic-rate band is taxed at 18%, and the rest at 24%.
How CGT is worked out
- Gain = disposal proceeds − cost − allowable expenses.
- Subtract the £3,000 annual exempt amount (per person, can’t be carried forward).
- Stack on income: taxable income up to £37,700 uses the basic-rate band; the unused part is available for the gain at 18%.
- Apply the rates: 18% within the remaining basic-rate band, 24% above.
Sources & as-of
- Annual exempt amount (£3,000) and rates: GOV.UK — Capital Gains Tax rates and allowances.
- 18% / 24% main rates effective 30 October 2024: GOV.UK — Capital Gains Tax rates of tax.
- Business Asset Disposal Relief 14% from 6 April 2025: HMRC CG63515.
- Income Tax thresholds (£12,570 / £37,700 / £50,270): GOV.UK — Personal Allowance and basic rate limit 2022–2026.
- 60-day property reporting: GOV.UK — Report and pay CGT.
- Page data as-of 2026-06-18. This is a planning estimate, not tax advice. Share-matching/pooling, reliefs and losses can change your gain — confirm your position on GOV.UK or with an adviser. Rates can change at fiscal events.