Capital gains tax calculator UK 2026/27
This capital gains tax calculator UK works out the Capital Gains Tax on shares, a second home, a buy-to-let or other assets you sell in the 2026/27 tax year. Enter your gains, your income and any losses: the calculator deducts the £3,000 tax-free allowance, checks how much of your basic rate band is left and splits the gain between 18% and 24%.
Example: Total gains in 2026/27 20,000 £ · What did you sell: shares, funds or crypto · Your income in 2026/27 40,000 £ · Losses in 2026/27 0 £ · Unused losses from earlier years 0 £ · Gains qualifying for Business Asset Disposal Relief 0 £ → Capital Gains Tax 2026/27: £3,463.80. Source: TCGA 1992 s. 1H, GOV.UK – Capital Gains Tax: rates and allowances 2026 to 2027: £3,000 tax-free allowance, 18% within and 24% above the basic rate band of £37,700, worked examples (read 08.10.2026). Updated: .
How it is calculated
In 2026/27 you pay 18% Capital Gains Tax on the part of your gains that fits into your unused basic rate band and 24% on the rest – for shares, property and other assets alike. The first £3,000 of gains each year is tax-free.
How the calculator works
- Add up your gains and deduct losses from the same tax year.
- Deduct the £3,000 tax-free allowance (Annual Exempt Amount). Unused losses from earlier years are only used to bring the gain down to the allowance; the rest is carried forward.
- Work out your taxable income: income minus the Personal Allowance of £12,570 (reduced by £1 for every £2 over £100,000).
- The basic rate band is £37,700. The part of the gain that fits into what is left of it is taxed at 18%, everything above at 24%.
2026/27 rates
| Gain | Rate |
|---|---|
| Inside the unused basic rate band | 18% |
| Above the basic rate band, or if you are a higher or additional rate taxpayer | 24% |
| Business Asset Disposal Relief (from 6 April 2026) | 18% (14% in 2025/26, 10% before) |
| Trustees and personal representatives | 24% |
Since 30 October 2024 residential property and other assets such as shares are taxed at the same rates.
Examples for 2026/27
- Basic rate taxpayer: income £32,570 (taxable income £20,000), gains £12,600. After the £3,000 allowance £9,600 is taxable; £20,000 + £9,600 = £29,600 stays below £37,700, so the tax is 18% = £1,728.
- Gain crossing the band: same income, gains £52,600. Taxable gain £49,600: 18% on £17,700 (£3,186) and 24% on £31,900 (£7,656) = £10,842.
- Higher rate taxpayer: income £60,000, shares sold with a £10,000 gain: 24% of £7,000 = £1,680.
- Losses carried forward: £10,000 gain and £20,000 of earlier losses: £7,000 of the losses are used, the gain falls to the allowance and no tax is due; £13,000 of losses carry forward.
- Default values: income £40,000 leaves £10,270 of the basic rate band. A £20,000 gain gives £17,000 taxable: 18% on £10,270 (£1,848.60) and 24% on £6,730 (£1,615.20) = £3,463.80.
Business Asset Disposal Relief
Gains on qualifying business disposals are taxed at 18% up to a lifetime limit of £1 million. They use up the basic rate band first, so other gains are more likely to fall into 24%. Example: income £32,570, gains £50,000 of which £30,000 qualify for relief – £30,000 × 18% = £5,400, and the other £17,000 is taxed at 24% = £4,080, total £9,480.
Your take-home pay after Income Tax: UK take-home pay calculator. Buying a property in England? Stamp duty calculator.
Limits
Not included: private residence relief for your main home (usually no tax), letting relief, gifts and hold-over relief, investors’ relief, non-residents and trusts. Income is reduced only by the Personal Allowance; pension contributions and Gift Aid extend the basic rate band and would lower the tax. The result is an estimate, not tax advice.
Frequently asked questions
What is the capital gains tax allowance for 2026/27?
£3,000 for individuals and £1,500 for most trusts. Only gains above it are taxed.
What are the capital gains tax rates in 2026/27?
18% on gains that fit into your unused basic rate band and 24% on the rest. Residential property and shares are taxed at the same rates; Business Asset Disposal Relief is 18%.
How much tax on a £20,000 gain on shares?
With an income of £40,000: £17,000 is taxable after the allowance, £10,270 at 18% and £6,730 at 24% – £3,463.80. As a higher rate taxpayer it is 24% of £17,000 = £4,080.
Do I pay capital gains tax when I sell my house?
Not usually on your main home, thanks to private residence relief. A second home or buy-to-let is taxable; you must report the sale and pay within 60 days.
Is capital gains tax different in Scotland?
No. Scottish Income Tax rates only apply to earnings, pensions and rent. Capital Gains Tax uses the UK rates of 18% and 24% and the UK basic rate band of £37,700.
How do losses reduce capital gains tax?
Losses in the same tax year are deducted in full. Losses from earlier years are used only to bring the gain down to the £3,000 allowance; the rest carries forward. Losses must be reported within 4 years.
Sources and legal basis
- TCGA 1992 s. 1H: GOV.UK – Capital Gains Tax: rates and allowances 2026 to 2027: £3,000 tax-free allowance, 18% within and 24% above the basic rate band of £37,700, worked examples (read 08.10.2026)
- TCGA 1992 s. 1I: Taxation of Chargeable Gains Act 1992, section 1I: 24% on gains exceeding the unused part of the basic rate band; gains at 18% relief rates use the band first – version up to date 07.10.2026 (read 08.10.2026)
- TCGA 1992 s. 169N: GOV.UK – Business Asset Disposal Relief: 18% from 6 April 2026, 14% in 2025/26, 10% until 5 April 2025 (read 08.10.2026)
- TCGA 1992 s. 169N: Taxation of Chargeable Gains Act 1992, section 169N: rate of 18% and £1 million lifetime limit – version up to date 07.10.2026 (read 08.10.2026)
- HMRC guidance: CGT losses: GOV.UK – Capital Gains Tax: losses – same-year losses first, earlier losses only down to the tax-free allowance, claim within 4 years (read 08.10.2026)
- HMRC guidance: Income Tax rates 2026/27: GOV.UK – Income Tax rates and Personal Allowances 2026/27: £12,570, reduced by £1 for every £2 over £100,000 (read 08.10.2026)
- HMRC manual STTG1000: HMRC – Scottish taxpayer technical guidance STTG1000: Scottish rates apply to non-savings, non-dividend income only (read 08.10.2026)
As of: · Editorial policy
Related tools
- UK take-home pay calculator 2026/27Work out your UK take-home pay for 2026/27: income tax (incl. Scotland), National Insurance, student loan and pension, checked against HMRC’s own calculator.
- Stamp duty calculator (SDLT) for England and Northern IrelandStamp duty calculator for England and Northern Ireland: SDLT on a home, first-time buyer relief, second homes (+5%) and non-UK buyers (+2%), band by band.
- UK VAT Calculator: add or remove VATAdd or remove UK VAT at 20%, 5% or 0% in one step. Works from the net price, the gross price or the VAT amount, with the 1/6 VAT fraction shown.
- Child benefit calculator (UK)UK child benefit calculator 2026/27: weekly and yearly Child Benefit for your children and the High Income Child Benefit Charge if you earn over £60,000.
- Statutory redundancy pay calculator (UK)Redundancy pay calculator for England, Scotland and Wales: statutory redundancy pay from age, full years of service and weekly pay, capped at £751 a week.
- Mortgage calculatorMortgage calculator: monthly payment with taxes, insurance, PMI and HOA from home price, down payment and rate – extra payments, 15 vs 30 years, amortization.
- Mortgage Rate Reset CalculatorMortgage rate reset calculator: enter your balance and the new rate to see the new payment, the payoff time and the extra interest compared with the old rate.
- Social Security spousal benefit calculatorSocial Security spousal benefit calculator: up to 50% of your spouse’s PIA, reduced if you claim before full retirement age – with your own benefit.
- Estate tax calculator 2026 (US federal)Estate tax calculator for 2026: $15 million exemption per person, 40% on the excess, marital and charitable deductions, lifetime gifts and portability.