Estimate Capital Gains Tax Before You Dispose
Calculate gains, losses, allowances, and likely CGT exposure for shares, property, crypto, and other assets.
Built for UK taxpayers, investors, landlords, and business owners by RR Accountants.
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.