Stable Numbers
Capital Gains Tax Estimator 2025/26
Calculate estimated CGT for the 2025/26 tax year. Choose asset type and enter other taxable income to place your gain into the correct rate.
£
£
Include legal fees and improvement costs where allowed.
£
Use income after personal allowance. This sets how much of your gain is in the basic rate band.
Asset type
Gain before allowance
Annual exempt amount
Chargeable gain
Estimated CGT
How CGT is worked out
- Annual exempt amount assumed £3,000 for 2025/26.
- Basic rate band limit assumed £37,700. Your other taxable income uses that band first.
- Residential property rates 18 percent in basic band and 24 percent above. Other assets 10 percent and 20 percent.
This tool estimates CGT only. It does not include reliefs such as Private Residence Relief, Business Asset Disposal Relief or loss carry forwards. Use figures as guidance.