UK Capital Gains Tax calculator
Estimate CGT exposure on shares, property, crypto, and other assets for 2026/27. Annual exempt amount and rates by band handled.
How is UK Capital Gains Tax calculated?
CGT is charged on the gain when you dispose of an asset that has increased in value. For 2026/27 the annual exempt amount is £3,000 — gains above that are taxable. For most assets and UK residential property the rates are 18% for basic-rate taxpayers and 24% for higher and additional-rate taxpayers (rates aligned from April 2025). Business Asset Disposal Relief sits at 18% from April 2026 (up from 14%). UK residential-property disposals must be reported and the tax paid within 60 days; other assets are reported via Self Assessment.
Practical guidance for real-world disposals and tax planning.
Tax Year & Asset Type
Disposal Details
Enter the main figures that affect your gain. Include allowable enhancement and disposal costs where relevant.
Tax Context
Used to estimate which CGT rate band applies.
If you have other chargeable gains, the annual allowance may already be partially used.
Reliefs & Special Circumstances
Select any applicable reliefs. Where relief is too nuanced to model precisely, the tool will flag for professional review.
Your estimate will appear here
Enter your asset and disposal details, then press "Calculate CGT" to see your estimated gain and tax exposure.
- Gain or loss on disposal
- Losses and allowance applied
- Estimated CGT and effective rate
- Net proceeds after tax
Disclaimer: This calculator provides general estimates for planning purposes only. Results depend on the assumptions entered and do not constitute tax advice. Actual CGT may vary depending on reliefs, asset history, pooling rules, and other factors.
What this calculator helps you understand
Gain vs Loss
See whether your disposal creates an estimated gain or loss.
Costs and Allowances
Understand how allowable costs, losses, and annual allowance can affect the result.
Asset Type Matters
Property, shares, crypto, and business assets can carry different CGT treatment.
Planning Context
Use the estimate as a planning tool before disposal or filing.
This tool provides a practical estimate based on selected assumptions. Actual outcomes depend on asset history, allowable costs, reliefs, losses, and your wider tax position.
Need help with a disposal, gain, or CGT return?
RR Accountants helps taxpayers, landlords, investors, and business owners review disposals, calculate gains properly, handle self-assessment, and plan around CGT before mistakes become expensive.
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Frequently Asked Questions
Need help with CGT, self-assessment, or tax planning?
RR Accountants supports individuals and businesses with capital gains reporting, self-assessment, property tax, business disposals, and practical tax advice.