Capital Gains Tax calculator UK 2026/27
Estimate 2026/27 Capital Gains Tax on ordinary gains. Enter gains, current-year losses and taxable income to apply the exemption and remaining basic band.
Enter your figures
Estimated Capital Gains Tax
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2026/27 ordinary individual gains only. Enter total annual gains and current-year allowable losses. Excludes trusts, carried interest, business reliefs, previous losses and main-home relief. Uses the UK basic band for all UK countries.
How the capital gains tax calculator uk 2026/27 works
Deduct current-year losses, then the £3,000 exemption. Tax gains within the remaining £37,700 basic band at 18%, and the rest at 24%.
UK data and rules
2026/27 data · Checked 16 October 2026. Rules are a dated snapshot, not a live feed.
Read about data coverage and updates
Worked example: capital gains tax
This illustration uses the calculator’s example inputs. It is not a quote or a recommended financial decision.
- Total gains before losses and exemption (£)
- 12,600
- Allowable current-year losses (£)
- 0
- Taxable income after allowances (£)
- 20,000
Estimated Capital Gains Tax: £1,728.00
Deduct current-year losses, then the £3,000 exemption. Tax gains within the remaining £37,700 basic band at 18%, and the rest at 24%.
Capital Gains Tax: questions answered
What does taxable income mean in the CGT calculator?
Enter income after your Personal Allowance and other Income Tax reliefs. This is used to work out how much of the UK basic-rate band remains for gains taxed at the lower CGT rate.
Using your result
Example inputs are a starting point. Replace them with your figures and select Calculate result. Results are rounded for display; calculations use unrounded values.
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