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Capital Gains Tax Calculator 2025-26
Calculate CGT on shares, funds, property and other assets.
📖 What is Capital Gains Tax?
Capital Gains Tax (CGT) is charged on the profit you make when you sell an asset that has risen in value — shares, investment property, crypto, or a business. You only pay tax on the gain, not the full sale price.
2025-26: £3,000 annual tax-free allowance · 18% basic rate · 24% higher rate · Your main home is usually exempt (Private Residence Relief)
£
£
CGT Owed
£3,164
Effective Rate
18.6%
Breakdown
Total Gain£20,000
Annual Allowance-£3,000
Taxable Gain£17,000
Gain at 18% (basic rate)£2,749
Gain at 24% (higher rate)£415
💡 Tax tip: Use your ISA allowance (£20,000/year) — gains inside an ISA are completely free of CGT.
Sources & References