UK Capital Gains Tax Calculator 2024-25
Calculate UK Capital Gains Tax (CGT) on shares, property, or other assets for 2024/25. Uses the £3,000 annual exempt amount and correct rates for basic vs higher rate taxpayers.
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How to use this calculator
- 1
Enter your total capital gain — this is the profit from selling the asset (sale price minus purchase cost minus allowable costs).
- 2
Enter your other taxable income for the year — this determines whether some or all of your gain falls in the basic rate band.
- 3
Select the asset type: residential property is taxed at higher CGT rates (18%/24%) than shares and other assets (10%/20%).
- 4
The £3,000 annual exempt amount (CGT allowance) is automatically deducted before tax is calculated.
- 5
Gains are effectively "stacked" on top of your other income, meaning higher earners are more likely to pay the higher CGT rate.
Frequently asked questions
What are the UK capital gains tax rates for 2024/25?
In 2024/25 the CGT rates depend on the type of asset and whether you are a basic or higher rate taxpayer. For shares and most other assets: basic rate taxpayers pay 10%, higher rate taxpayers pay 20%. For residential property (that is not your main home): basic rate taxpayers pay 18%, higher rate taxpayers pay 24%. The rates for residential property increased from 18%/28% to 18%/24% in the October 2024 Autumn Budget. Every individual has a £3,000 annual exempt amount — gains below this are entirely free of CGT. The exempt amount was significantly reduced from £12,300 (2022/23) to £6,000 (2023/24) and then to £3,000 for 2024/25.
Do I pay CGT on selling my main home?
Generally no. Private Residence Relief (PRR) exempts gains on the sale of your main home from CGT, as long as it has been your only or main residence throughout the period of ownership. If you let the property, used part of it for business, or owned it for longer than you lived in it, only a proportion of the gain will be exempt. The final 9 months of ownership always qualify for PRR even if you have moved out. You cannot claim PRR on a second home, rental property, or holiday let. If you own multiple properties, you can elect which one is your principal private residence within two years of acquiring the second property.
How is CGT calculated when I have both a salary and a capital gain?
Capital gains are taxed on top of your other income, not separately. For example, if your taxable income (after the personal allowance) is £30,000 and the basic rate limit is £37,700 above the personal allowance, you have £7,700 of the basic rate band remaining. Your first £7,700 of taxable gain would be taxed at the basic rate (10% for shares, 18% for property), and the rest at the higher rate (20% or 24%). This stacking means that a large capital gain can effectively push you into higher rate territory even if your regular income is modest. Pension contributions that reduce your taxable income can help preserve more of your basic rate band for capital gains.
What costs can I deduct to reduce my capital gain?
You can deduct allowable costs from the sale proceeds to reduce the gain. These include: the original purchase price; solicitor and estate agent fees on purchase and sale; stamp duty paid on purchase; costs of improvements to the property (but not maintenance or repairs); and the annual exempt amount. You cannot deduct mortgage interest, insurance, or general maintenance costs. For shares, you can deduct dealing costs (but not advisory fees). If you make a capital loss on an asset in the same tax year, it can be offset against gains before the annual exempt amount is applied, which can significantly reduce your CGT bill.
UK Capital Gains Tax Calculator 2024/25 — Shares, Property & Annual Exempt Amount
How UK capital gains tax works in 2024/25
Capital Gains Tax (CGT) is charged on the profit you make when you sell or dispose of an asset that has increased in value. CGT is not charged on your total sale proceeds but only on the gain — the difference between what you paid for an asset and what you receive when you sell it, after deducting allowable costs. In 2024/25, every UK individual has an annual CGT exempt amount of £3,000 — down sharply from £12,300 in 2022/23. Only gains above this threshold are taxable. The rates vary: for shares and other assets, basic rate taxpayers pay 10% and higher rate taxpayers pay 20%. For residential property that is not your main home, the rates are 18% (basic) and 24% (higher). CGT must be reported and paid via Self Assessment for most disposals, though residential property gains must be reported within 60 days of completion. Married couples and civil partners can transfer assets between themselves at no gain or loss, effectively doubling the annual exempt amount available to the household.
Strategies to reduce your UK capital gains tax bill
There are several effective ways to minimise capital gains tax in the UK. First, use your annual exempt amount every year — it cannot be carried forward, so if you have gains to realise, timing disposals across two tax years can allow two annual exempt amounts. Second, transfer assets to a spouse or civil partner before sale, as they have their own £3,000 annual exempt amount and may pay at a lower rate if their income is in the basic rate band. Third, hold investments within an ISA or pension — gains within these wrappers are completely free of CGT. Fourth, make pension contributions to reduce your taxable income, which can push more of your gain into the lower CGT rate band. Fifth, offset capital losses from other assets against gains in the same year. Finally, Enterprise Investment Scheme (EIS) and Seed EIS investments offer CGT deferral and exemption reliefs for reinvesting gains into qualifying early-stage companies.
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →