Capital Gains Tax Calculator

CGT on shares or property with the £3,000 exempt amount.

Result

Gain after £3,000 exempt£17,000.00
At 10%£1,700.00
At 20%£0.00
CGT due£1,700.00

Capital Gains Tax Calculator — FAQs

CGT allowance?

£3,000 exempt for 2024/25+ — was £12,300 in 2022/23.

CGT rates?

Shares: 10%/20%. Property: 18%/24%. Applied based on remaining basic-rate band after income.

CGT allowance 2025/26?

£3,000 exempt gains per year — use it or lose it; no carry-forward.

CGT on second homes?

18% basic-rate band, 24% higher — on gains above the £3,000 allowance. Report and pay within 60 days of completion.

Need a Custom Tool Built?

We build calculators, estimators and internal tools for businesses in the UK and North America.

Get a Quote

Embed this Capital Gains Tax Calculator on your site

Free to use — paste this snippet into any webpage. It auto-resizes and includes a small attribution link. Add ?theme=dark to the iframe URL for dark mode.