Capital Gains Tax Calculator 2025/26

Calculate your UK Capital Gains Tax for 2025/26 on shares, property and other assets. Includes the £3,000 annual exempt amount and rate stacking.

HMRC 2025/26 rates
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Your Asset Sale

Your Capital Gains Tax

CGT Payable
£0
Effective CGT rate: 0%
Total Gain
£0
Annual Exempt Amount
£0
Taxable Gain
£0
Lower Band CGT
£0
Higher Band CGT
£0
Effective Rate
0%
Net Proceeds
£0

Based on 2025/26 HMRC CGT rates. This is an estimate — seek professional advice for complex disposals.

How Capital Gains Tax Works in the UK

Capital Gains Tax (CGT) is charged on the profit you make when you sell or dispose of an asset that has increased in value. It applies to assets such as shares, investment property, business assets, and valuable personal possessions worth over £6,000.

Calculating Your Gain

Your capital gain is calculated as the sale price minus the purchase price, minus any allowable costs. Allowable costs include buying and selling fees (solicitor, estate agent, broker fees), stamp duty on purchase, and the cost of improvements (but not maintenance).

The Annual Exempt Amount

For 2025/26, the annual exempt amount is £3,000. This is the amount of gains you can make tax-free each year. It was significantly reduced from £12,300 in 2022/23 to £6,000 in 2023/24 and then to £3,000 from 2024/25 onwards.

2025/26 CGT Rates

Asset TypeBasic Rate TaxpayerHigher/Additional Rate
Shares & other assets10%20%
Residential property18%24%
Carried interest18%28%

Annual Exempt Amount History

Tax YearAnnual Exempt Amount
2025/26£3,000
2024/25£3,000
2023/24£6,000
2022/23£12,300
2021/22£12,300
2020/21£12,300

Reporting Deadlines

How and when you report CGT depends on the asset type:

  • Residential property: You must report and pay CGT within 60 days of completion using HMRC's CGT on UK property service. This applies even if you also need to file a Self Assessment return.
  • Shares and other assets: Report via your Self Assessment tax return by 31 January following the end of the tax year.
60-day property reporting rule: If you sell a residential property (that is not your main home) you must report the gain and pay any CGT due within 60 days of completion. Late filing can result in penalties and interest charges.

How Your Income Affects the CGT Rate

Your taxable gain is "stacked" on top of your taxable income. If your income plus gain stays within the basic rate band (up to £50,270 for 2025/26), you pay the lower CGT rate. If the gain pushes you above this threshold, the portion above is taxed at the higher rate.

Capital Gains Tax Examples

Selling Shares (Basic Rate)

Sale proceeds£50,000
Purchase cost£30,000
Broker fees£500
Total gain£19,500
Annual exempt amount-£3,000
Taxable gain£16,500
Annual income£30,000
CGT at 10%£1,650

Buy-to-Let Property

Sale proceeds£350,000
Purchase cost£200,000
Allowable costs£15,000
Total gain£135,000
Annual exempt amount-£3,000
Taxable gain£132,000
Annual income£45,000
CGT (18% & 24%)£30,828

Higher Rate Share Sale

Sale proceeds£200,000
Purchase cost£80,000
Costs£2,000
Total gain£118,000
Annual exempt amount-£3,000
Taxable gain£115,000
Annual income£60,000
CGT at 20%£23,000

Frequently Asked Questions

What is the Capital Gains Tax annual exempt amount for 2025/26?

The CGT annual exempt amount for 2025/26 is £3,000. This was reduced from £6,000 in 2023/24 and £12,300 in 2022/23. The reduction means more people now have a CGT liability when disposing of assets.

What are the CGT rates for 2025/26?

For shares and other assets: basic rate taxpayers pay 10%, higher and additional rate taxpayers pay 20%. For residential property: basic rate taxpayers pay 18%, higher and additional rate taxpayers pay 24%. The rate you pay depends on your total taxable income plus the gain.

How do I report capital gains to HMRC?

For residential property, you must report and pay CGT within 60 days of completion using HMRC's "Report and pay Capital Gains Tax on UK property" service. For shares and other assets, you report via your Self Assessment tax return by 31 January following the end of the tax year.

Can I offset capital losses against gains?

Yes. Capital losses in the same tax year must be offset against gains before applying the annual exempt amount. Unused losses can be carried forward indefinitely to offset against future gains. You must register losses with HMRC within 4 years of the end of the tax year in which they arose.

Is my main home subject to CGT?

Your main home (principal private residence) is usually exempt from CGT due to Private Residence Relief (PRR). However, CGT may apply if you have let part of it out, used part exclusively for business, have grounds exceeding 0.5 hectares, or if you have been absent for extended periods without qualifying exemptions.

How does my income affect my CGT rate?

Your taxable gain is stacked on top of your taxable income to determine which CGT rate applies. If your income uses up the basic rate band (£50,270 for 2025/26), the entire gain is taxed at the higher rate. If there is basic rate band remaining, the portion of your gain within that band is taxed at the lower rate, with the remainder at the higher rate.

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