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Capital Gains Tax Calculator 2026/27
Free UK Capital Gains Tax calculator for 2026/27: your gain after costs and losses, the £3,000 annual exempt amount, and 18% or 24% depending on your income.
What you sold
Capital Gains Tax
£4,423.80
| Gain | £24,000 |
| Annual exempt amount | − £3,000 |
| Taxable gain | £21,000 |
| At 18% (fits in your basic-rate band) | £10,270 |
| At 24% | £10,730 |
| Tax to pay | £4,423.80 |
Good to know
- Your main home is usually free of CGT (Private Residence Relief).
- Selling UK residential property? Report and pay within 60 days of completion.
- Shares in an ISA are free of CGT. Business Asset Disposal Relief has its own rate.
For individuals, 2026/27 rates (18% and 24%). Rules last checked October 2026. Not legal, tax or financial advice. 🔒 Everything stays on your device.
✅ Rules last checked:
📚 Official sources: GOV.UK
We build every tool from the official rules and re-check them when they change. Always confirm with the official source before you rely on a result.
🛠️ Spotted a mistake or an out-of-date rule? Tell us
Questions people ask
What are the CGT rates for 2026/27?+
18% on gains that fit in your unused basic-rate band and 24% above it, for shares, crypto and residential property alike.
How much can I gain tax-free?+
£3,000 a year (the annual exempt amount).
When do I pay CGT on a property sale?+
For UK residential property, report and pay within 60 days of completion. Other gains go on your Self Assessment return.