Capital Gains Tax UK Calculator
Calculate your UK Capital Gains Tax (CGT) liability for the 2024/25 tax year. This calculator includes the annual CGT exemption, basic and higher rate bands, and various reliefs.
CGT Summary
Tax Breakdown
2024/25 CGT Rates
Understanding UK Capital Gains Tax
Capital Gains Tax (CGT) is a tax on the profit when you sell (or 'dispose of') an asset that's increased in value. It's the gain, not the total sale proceeds, that is taxed. CGT applies to most assets, including property, shares, and valuable items.
2024/25 CGT Rates and Allowances
Current CGT Rates
CGT Rates
Basic rate taxpayers: 18%
Higher/additional rate taxpayers: 28%
Trusts: 28%
Some assets have special rates
Annual Exemptions
Individual: £12,300 (2024/25)
Most trusts: £6,150
Settlor-interested trusts: £0
Exemption is per person
Calculating Capital Gains
CGT Calculation Steps
Step 1: Calculate the Gain
Gain = Disposal Proceeds - (Base Cost + Incidental Costs of Disposal)
Step 2: Apply Reliefs and Exemptions
Subtract annual exemption, business asset disposal relief, etc.
Step 3: Calculate Tax Due
Apply appropriate CGT rate to taxable gain
Step 4: Pay Tax
Report and pay within 60 days of completion (property) or 31 January following tax year
Assets Subject to CGT
Taxable Assets
- Shares and securities
- Second homes and buy-to-let properties
- Antiques and collectibles
- Cryptocurrency
- Business assets
- Options and futures
Exempt Assets
- Main residence (with reliefs)
- ISAs and pensions
- Personal belongings worth under £6,000
- Cars (except for business use)
- National Lottery wins
- Government gilts
CGT Reliefs and Exemptions
| Relief/Exemption | Description | Maximum Relief |
|---|---|---|
| Annual Exemption | Tax-free allowance per person | £12,300 (2024/25) |
| Business Asset Disposal Relief | For business owners disposing of business assets | £1 million lifetime limit |
| Investors' Relief | For unlisted shares in trading companies | £10 million lifetime limit |
| Private Residence Relief | For main residence property gains | Unlimited |
Main Residence Relief
If you sell your main home, you may be able to claim Private Residence Relief (PRR) to reduce or eliminate CGT. The relief covers the entire gain if you've lived in the property for the entire ownership period. There are also reliefs for periods when the property wasn't your main home.
Reporting and Payment
CGT must be reported on your Self Assessment tax return. For property disposals, you must report the sale within 60 days. The tax is normally paid by 31 January following the end of the tax year. Late payment can result in penalties and interest.
CGT and Income Tax
Your CGT rate depends on your Income Tax band. If you're a basic rate taxpayer, CGT is charged at 18%. If you're a higher or additional rate taxpayer, CGT is charged at 28%. This creates a 'clawback' effect where large gains can push you into higher tax brackets.
Key Takeaways for UK CGT
- CGT is charged on the gain, not the total sale proceeds
- Annual exemption of £12,300 for 2024/25
- Rates are 18% (basic rate) or 28% (higher/additional rate)
- Main residence relief can eliminate CGT on home sales
- Business assets may qualify for Business Asset Disposal Relief
- Report disposals on Self Assessment tax return
- Payment deadlines vary by asset type
- Professional advice recommended for complex cases