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Capital Gains Tax calculator

Estimate the CGT due when you sell shares, property or other assets β€” using the 2026/27 rules: Β£3,000 allowance, 18% and 24% rates.

Your gain

Β£

Sale proceeds minus what you paid (and qualifying costs).

Β£

Your income minus the personal allowance and reliefs.

Capital Gains Tax due
β€”
Taxable gain
(after Β£3,000 allowance)
β€”
Gain after tax
β€”
2026/27: the tax-free allowance is Β£3,000. You pay 18% on gains within your basic rate band and 24% above it. Residential property and most other assets now share the same rates.

Estimate only β€” not financial advice. Losses, spousal transfers and other reliefs are not modelled here.

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