● 2026/27 · 18% & 24% · £3,000 allowance

Capital Gains Tax Calculator

Q: How much CGT will I pay on a £20,000 gain?

With £30,000 of income and a £20,000 gain in 2026/27, you pay £3,060 in Capital Gains Tax. The first £3,000 is covered by the annual exempt amount, and the remaining £17,000 falls within your unused basic-rate band, so it is taxed at 18%.

Q: What is the capital gains allowance for 2026/27?

The Capital Gains Tax annual exempt amount for 2026/27 is £3,000. The first £3,000 of total gains in the tax year is tax-free; only gains above £3,000 are charged to CGT.

Q: What are the CGT rates for 2026/27?

For 2026/27 Capital Gains Tax is charged at 18% on gains that fall within your unused basic-rate income band and 24% on gains above it. These rates apply to both shares and other assets and to residential property.

With £30,000 of income and a £20,000 gain you pay £3,060 in Capital Gains Tax for 2026/27 — the first £3,000 is exempt, and the remaining £17,000 sits in your basic-rate band, taxed at 18%. Enter your income and gain to see your own CGT.

🧾 18% / 24% breakdown 💷 £3,000 exemption applied 📅 2026/27 HMRC rates

Calculate your Capital Gains Tax

England, Wales & Northern Ireland · 2026/27

Taxable income (before gains) salary, pension, etc.

Total capital gain profit on the sale

Asset type

Rates are the same (18% / 24%) for both in 2026/27.

Capital Gains Tax for 2026/27

£0

on a gain · exempt

Band	Gain taxed	Tax
Tax-free (annual exempt amount)	£0	£0
Basic-rate band (18%)	£0	£0
Higher-rate band (24%)	£0	£0
Total Capital Gains Tax		£0

CGT only — your Income Tax and National Insurance on other earnings are separate. See those with the income tax calculator.

How Capital Gains Tax works in 2026/27

You pay Capital Gains Tax (CGT) on the profit when you sell an asset for more than you paid, not on the full sale price. Everyone gets an annual exempt amount of £3,000 — the first £3,000 of total gains in the tax year is tax-free. Your remaining gain is then stacked on top of your income to decide which rate applies.

Gains use your income band. The part of your gain that still fits inside your unused basic-rate band is taxed at 18%; anything above the basic-rate threshold is taxed at 24%. For 2026/27 these rates are unified — shares, other assets and residential property all use the same 18% / 24% rates.

Where the gain sits (2026/27)	Shares / other	Residential property
First £3,000 of total gains	0%	0%
Gain within unused basic-rate band	18%	18%
Gain above the basic-rate band	24%	24%

Worked examples for 2026/27

Here is how the calculator arrives at the tax in two common cases:

£30,000 income, £20,000 gain → £3,060. The first £3,000 is exempt, leaving a £17,000 taxable gain. With £30,000 income (£17,430 taxable), there is £20,270 of basic-rate band left — so the whole £17,000 gain is taxed at 18% = £3,060.

£60,000 income, £25,000 gain on shares → £5,280. The £3,000 exemption leaves a £22,000 taxable gain. Income of £60,000 has already used up all of the basic-rate band, so the entire £22,000 gain is taxed at 24% = £5,280.

Because gains stack on top of income, a higher salary leaves less room in the 18% band — so the same gain can cost more CGT for a higher earner than a basic-rate taxpayer.

Ways to reduce Capital Gains Tax

Several legitimate steps reduce the CGT you owe:

Use your £3,000 exemption each year — it cannot be carried forward, so spreading disposals across tax years can save tax.
Hold investments in an ISA — gains inside a Stocks & Shares ISA are CGT-free. Plan with the ISA calculator.
Transfer assets to a spouse or civil partner — transfers between spouses are CGT-free and use a second £3,000 exemption and basic-rate band.
Offset losses — capital losses from other disposals reduce your taxable gains.

Rates and allowances are taken from GOV.UK — Capital Gains Tax rates ↗ and allowances ↗ for 2026/27.

Capital Gains Tax FAQs

How much CGT will I pay on a £20,000 gain?

With £30,000 of income and a £20,000 gain, you pay £3,060 in 2026/27. The first £3,000 is covered by the annual exempt amount, and the remaining £17,000 falls within your unused basic-rate band, so it is taxed at 18%. A higher income would push part of the gain into the 24% band.

What is the capital gains allowance for 2026/27?

The annual exempt amount is £3,000. The first £3,000 of total gains in the tax year is tax-free; only gains above £3,000 are charged to CGT.

What are the CGT rates for 2026/27?

CGT is charged at 18% on gains within your unused basic-rate band and 24% on gains above it. These rates apply to both shares and other assets and to residential property.

Are property and share gains taxed differently?

No — for 2026/27 the rates are unified, so residential property and shares are both taxed at 18% and 24%. The main practical difference is reporting: property gains must usually be reported and paid within 60 days of completion.