Estimate how much Capital Gains Tax you may owe on property, shares or other taxable gains using sale proceeds, purchase cost, allowable expenses, losses and your income.
Calculate CGTAdjust figures — results update instantly.
You get just one £3,000 annual exempt amount across all your disposals in a tax year — not £3,000 for each. Enter the gain on each disposal to see the correct combined Capital Gains Tax. Estimate only — not advice.
Add sale proceeds, purchase cost and allowable expenses such as legal fees, agent fees and improvement costs.
Enter any capital losses to offset the gain. Add taxable income so the calculator can work out whether the gain falls at 18% or 24%.
See CGT at each rate, the exempt amount used, net proceeds after tax, and effective CGT rate on the gross gain.
Bought in 2010 for £185,000. Sold in 2025 for £280,000. Higher-rate taxpayer.
| Gross gain | £95,000 |
| Less allowable costs (agent, legal, improvements) | −£12,000 |
| Less annual exempt amount | −£3,000 |
| Taxable gain | £80,000 |
| CGT at 24% | £19,200 |
Due within 60 days of completion. Try adjusting the figures in the calculator above.
In-depth guides to CGT rules, rates and allowances for 2026/27. Written for UK taxpayers, not accountants.
No Private Residence Relief, 60-day reporting and 18%/24% rates. How CGT works on holiday homes and investment property.
→Probate value as your base cost, allowable deductions and worked example of CGT on an inherited property sale.
→Capital gains tax when selling a buy-to-let property — allowable costs, 2026/27 rates and a worked example.
→How capital losses reduce taxable gains, when losses carry forward and how they interact with the annual exempt amount.
→The 60-day rule for residential property and Self Assessment deadlines for other gains — what you must report and when.
→How CGT is calculated when your income stays within the basic-rate band and why large gains can still hit 24%.
→Business Asset Disposal Relief at 18% for qualifying business sales — who qualifies and how it reduces your CGT bill.
→When your income exceeds £50,270 all your taxable gains are charged at 24% — how that works and what reduces the bill.
→How income interacts with CGT, worked example at £60k income, partial-rate scenarios and planning options.
→Giving an asset can trigger CGT at market value — gifts to children, spouses, charities and when Hold-Over Relief applies.
→What records to keep for HMRC, how long to keep them and what happens if records are lost or incomplete.
→Step-by-step: gross gain, losses, AEA, income band split and 18%/24% rates — with full worked examples.
→18%/24% on all assets since October 2024. What changed, BADR at 18% from April 2026, the AEA and worked rate examples.
→The annual exempt amount is £3,000. How it has been cut, the use-it-or-lose-it rule and how to make the most of it.
→18%/24% on second homes and buy-to-let since October 2024. Allowable costs, 60-day rule and planning strategies.
→18%/24% on shares outside ISAs. Section 104 pooling, the 30-day rule and bed-and-ISA strategy explained.
→The bed-and-breakfast rule: how it works, why it matters for loss crystallisation and the ISA exception.
→Business Asset Disposal Relief at 18% on up to £1m lifetime (from April 2026). Qualifying conditions, worked example and risks.
→CGT rates are the same in Scotland, but the lower Scottish income tax threshold affects which CGT band applies.
Free tools to estimate capital gains tax on different asset types for 2026/27.
Estimate CGT on any disposal — shares, property, crypto or other assets. Enter proceeds, cost, losses and income.
→Estimate capital gains tax on a second home, buy-to-let or inherited property using 2026/27 rates.
→Calculate CGT on shares, funds and other investment assets held outside an ISA or pension for 2026/27.
→Estimate capital gains tax on cryptocurrency disposals for 2026/27, including pooling basics.
→Calculate how much of your £3,000 annual exempt amount remains after your gains for 2026/27.
→Dedicated CGT calculator for UK property sales. Enter purchase price, improvements, sale price and income for a full estimate.
UKCapitalGainsTaxCalculator is part of the UK Money Calculators network — free, independent tools for estimating UK tax and finances.
We calculate the gross gain (sale proceeds minus purchase cost and allowable costs), deduct capital losses and the £3,000 annual exempt amount, then split the taxable gain across the 18% and 24% CGT bands. Your taxable income before the gain determines how much basic-rate band (£37,700) remains.
This calculator does not handle private residence relief, lettings relief, Business Asset Disposal Relief, non-UK residents, trusts, or complex share matching. It is a simplified estimate for standard individual disposals.