Rates updated for 2025/26 tax year
Shares Capital Gains Tax Calculator
Calculate CGT on shares, ETFs, investment trusts and other securities. Rates rose from 10%/20% to 18%/24% from October 2024.
18% Basic rate (was 10%)·24% Higher rate (was 20%)
Shares CGT Notes
- • Shares in an ISA or SIPP are completely sheltered from CGT — use this calculator only for shares held outside a wrapper.
- • UK HMRC uses Share Identification Rules (same-day, bed & breakfast 30-day, then Section 104 pool) for calculating your cost basis.
- • Allowable costs include broker commissions and stamp duty on purchase.
- • Report gains via Self Assessment by 31 January following the tax year end.
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Used to determine your CGT rate band
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Other CGT gains already realised in 2025/26
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2025/26 Rates: 18% (basic rate) · 24% (higher rate) · £3,000 annual allowance
Enter your purchase and sale prices
Your CGT breakdown will appear here instantly
Shares CGT Rates 2025/26 — What Changed?
The October 2024 Autumn Budget significantly raised CGT rates for shares and other non-property assets. The basic rate doubled from 10% to 18%, and the higher rate increased from 20% to 24%, effective 30 October 2024. If you made disposals before that date in 2024/25, you may benefit from split-year calculations — check with your accountant. The annual CGT allowance of £3,000 is unchanged.