Free Capital Gains Tax Calculator 2025/26
Use our capital gains tax calculator to estimate your taxable capital gain and CGT due. Based on current tax year rates and CGT allowance. For guidance only—get professional CGT advice for your situation.
Free Capital Gains Tax Calculator 2025/26
Estimate your capital gains tax based on current rates and the annual exempt amount. This tool is for guidance only; always seek professional advice for your situation.
Results
Enter values and click Calculate.
Rates used: 2025/26 tax year. Annual exempt amount £3,000. Basic rate: 10% (other) / 18% (residential). Higher/Additional: 20% (other) / 24% (residential). Check GOV.UK for latest.
How the CGT Calculation Works
Capital gain = sale price minus purchase price minus allowable costs. You then subtract your annual exempt amount (CGT allowance). The remaining taxable gain is taxed at the rate that applies to your income band and asset type (other assets vs residential property). Our calculator does this step by step.
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