CAPITALGAINS TAXCALCULATOR
Work out how much Capital Gains Tax you owe on shares, property, or other assets using current 2024/25 UK rates and the £3,000 annual exempt amount.
Asset Type
Your Income Tax Band
Parameters
Annual exempt amount: £3,000 (2024/25 onwards). You only pay CGT on gains above this threshold.
2024/25 CGT Rates
| Asset Type | Basic Rate | Higher Rate |
|---|---|---|
| Shares & Investments | 10% | 20% |
| Residential Property | 18% | 24% |
| Other Assets | 10% | 20% |
| Annual exempt amount: £3,000 per person (2024/25 onwards) | ||
About UK Capital Gains Tax
Shares & Investments
CGT on shares applies when you sell stocks, funds, or other investments at a profit. Basic rate taxpayers pay 10%, while higher rate taxpayers pay 20%. Shares held in an ISA or pension are completely exempt from CGT.
Residential Property
Higher CGT rates apply to residential property that is not your main home. Basic rate taxpayers pay 18% and higher rate taxpayers pay 24%. Your main home is usually exempt thanks to Private Residence Relief.
Reporting & Deadlines
UK property disposals must be reported to HMRC within 60 days. For other assets, report through Self Assessment by 31 January after the tax year ends. Late reporting can result in penalties.
Rates shown are for the 2024/25 tax year onwards. Different rules may apply for business assets (Business Asset Disposal Relief). Always consult a tax professional for specific advice.
What Is Capital Gains Tax?
Capital Gains Tax (CGT) is a tax on the profit you make when you sell or dispose of an asset that has gone up in value. It is the gain that gets taxed, not the total amount you receive. Importantly, you do not pay CGT on your main home (thanks to Private Residence Relief), personal possessions worth £6,000 or less, ISAs and pensions, or UK government gilts. You only pay CGT on gains above your annual exempt amount, which is £3,000 for the 2024/25 tax year onwards. This was slashed from £12,300 just two years ago, so more people than ever are now caught by CGT.
How to Use This Calculator
This calculator works out your Capital Gains Tax liability step by step, using the correct 2024/25 UK rates for your asset type and tax band.
Enter Your Purchase and Sale Prices
Input what you originally paid for the asset and what you sold it for. The difference is your total gain (or loss).
Add Your Allowable Costs
Include buying costs (e.g. broker fees, solicitor fees), selling costs (e.g. estate agent fees), and any improvement costs that enhanced the asset's value. General maintenance does not count.
Select Asset Type and Tax Band
Choose the type of asset you sold and whether you are a basic rate or higher/additional rate taxpayer. Residential property attracts higher CGT rates than shares and other assets.
Review Your Breakdown
See your total gain, deductions, the £3,000 annual exempt amount, taxable gain, CGT due, and your effective tax rate on the gain.
Capital Gains Tax Formula
First, calculate your total gain by subtracting the purchase price from the sale price. Then subtract any allowable costs (buying, selling, and improvement costs). Next, deduct your £3,000 annual exempt amount. The remaining taxable gain is multiplied by the appropriate CGT rate. For example, if you bought shares for £20,000 and sold them for £35,000 with £500 in costs, your gain is £14,500. After costs (£14,000) and the exempt amount (£11,000 taxable), a basic rate taxpayer would pay £1,100 in CGT (10%).
Tips & Best Practices
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Use your ISA allowance to shelter investments from CGT entirely — you can transfer existing shares into an ISA using a 'Bed and ISA' strategy
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Each person has their own £3,000 annual exempt amount — jointly owned assets can be split between partners to use both allowances
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Time your disposals across tax years to use two annual exempt amounts — sell some before 5 April and the rest after
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Keep records of all purchase costs, improvement costs, and selling costs — they all reduce your taxable gain
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Report UK residential property gains to HMRC within 60 days of completion, or face penalties and interest
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If you have losses from other disposals, you can offset them against gains before applying the annual exempt amount
Frequently Asked Questions
Mandeep Singh · 25+ Years UK Financial Services
Important Information
This calculator is for informational purposes only and does not constitute financial advice or a personal recommendation.
Results are estimates based on the information you provide and may not reflect your actual financial position.
You should consider seeking independent professional advice tailored to your specific circumstances before making any financial decision.