Precision Utility
How Much Capital Gains Tax Will I Pay? UK Calculator
The UK Capital Gains Tax annual exemption is £3,000 per person. Gains above £3,000 on residential property are taxed at 18% (basic) or 24% (higher), and shares/other assets at 18% / 24%.
Annual Exempt Amount
£3,000
Tax Year
2026/27
Estimate your UK capital gains tax on shares, property, crypto and other investments. Enter your purchase price, sale price and taxable income to see how much CGT you owe. The calculator uses 2026/27 HMRC rates with the £3,000 annual exempt amount and automatically splits your gain between basic and higher rate bands, so you can see your total tax liability instantly.
Investment Details
I bought this asset for £ originally.
Estimated Capital Gains Tax
£0
Total Gain
£0
Tax-Free Allowance
£3,000
Taxable Gain
£0
CGT Due
£0
Capital loss: You can offset capital losses against gains in the same tax year. Unused losses can be carried forward to offset against future gains — report them to HMRC within four years.
How the capital gains tax calculator works
Start by entering your purchase price (also called cost basis) — the amount you originally paid for the asset. Then enter the sale price you received or expect to receive. The calculator subtracts the purchase price from the sale price to determine your total capital gain or loss.
Next, enter your annual taxable income after the personal allowance and other Income Tax reliefs. The basic rate band is £37,700 of taxable income. The calculator subtracts your taxable income from £37,700 to determine how much of the band remains for your gain.
Select your asset type. For gains made from 6 April 2026, shares, funds, crypto, other assets and residential property that is not your main home are taxed at 18% within the remaining basic rate band and 24% above it.
The calculator automatically deducts the £3,000 annual exempt amount from your gain before calculating tax. If your gain straddles the basic rate threshold, it splits the gain between the two rates so you see an accurate figure.
What you need to know about UK capital gains tax in 2026/27
Capital gains tax may apply when you sell or dispose of shares, investment property, crypto assets, valuable personal possessions and some business assets. This estimate applies standard 2026/27 rates; it does not assess relief eligibility, including Business Asset Disposal Relief, or its lifetime limit. Check HMRC guidance for qualifying disposals.
Annual exempt amount history: The tax-free allowance has been reduced sharply in recent years. It was £12,300 in 2022/23, cut to £6,000 in 2023/24 and reduced again to £3,000 from 2024/25 onwards. This means more taxpayers now have a CGT liability on relatively modest gains.
When you do not pay CGT: You do not pay capital gains tax when you sell your main home (Private Residence Relief), on gains within ISAs or pensions, on gifts to your spouse or civil partner, on UK government gilts or on personal possessions sold for less than £6,000. Gains on death are also exempt — the assets are revalued at market value for inheritance tax purposes instead.
The 60-day reporting rule: If you sell UK residential property at a gain (and it is not covered by Private Residence Relief), you must report and pay the CGT to HMRC within 60 days of completion. For all other assets, you report gains through your Self Assessment tax return by 31 January following the end of the tax year.
Losses and offsetting: Capital losses can be deducted from gains in the same tax year. If your losses exceed your gains, the excess can be carried forward indefinitely to reduce future gains. You must report losses to HMRC within four years of the end of the tax year in which they arose.
Frequently asked questions
What is the capital gains tax allowance for 2026/27?
The annual exempt amount for 2026/27 is £3,000 per person. This means you can make up to £3,000 in capital gains each tax year before paying any CGT. The allowance was reduced from £6,000 in 2023/24 and £12,300 in 2022/23.
Do I pay capital gains tax on my home?
No, you do not pay CGT when you sell your main home thanks to Private Residence Relief. This applies automatically if the property has been your only or main residence throughout the time you owned it. You may owe CGT on part of the gain if you let the property out or used it for business.
What are the UK capital gains tax rates for 2026/27?
For gains made from 6 April 2026, basic rate taxpayers pay 18% and higher or additional rate taxpayers pay 24% on shares, other assets and residential property. The rate depends on your taxable income plus the taxable gain.
When do I need to report capital gains tax?
Report and pay tax on taxable gains from UK residential property within 60 days of completion. If you file Self Assessment, report your gains by 31 January following the tax year; you must also report asset disposals with total proceeds over £50,000, even if gains are below the annual exempt amount. If taxable gains exceed the allowance and you do not file Self Assessment, check HMRC's real-time reporting service.
Are ISA gains subject to capital gains tax?
No. Any gains made within an Individual Savings Account (ISA) are completely free from capital gains tax. This applies to stocks and shares ISAs, innovative finance ISAs and Lifetime ISAs. This makes ISAs one of the most tax-efficient ways to invest in the UK.
How do I work out which CGT rate applies to me?
Add your taxable income to your taxable gain after deducting the annual exempt amount. The basic rate band is £37,700 of taxable income. The portion of your gain within the remaining band is taxed at 18%; any amount above it is taxed at 24%.
Can I offset capital losses against gains?
Yes. You can deduct allowable capital losses from your gains in the same tax year. If your losses exceed your gains, you can carry the unused losses forward to offset against future gains. You must report losses to HMRC within four years of the end of the tax year in which they occurred.