Tax

Capital Gains Tax Calculator

CGT on gains with in-year and brought-forward losses, the annual exempt amount and the right rate.

Tax year 2026/27

Total capital gains

Total gains declared for the year, before losses and the allowance.Losses this year

Same-year losses — set against gains first, in full.Losses brought forward

Unused losses from earlier years — used only down to the allowance.Other income (this year)

Gross income excluding the gain — used to see how much basic-rate band is left.

Asset type

Capital Gains Tax

£5,864

Effective 19.5% of the gains

Total gains£30,000

Less annual exempt amount− £3,000

Taxable gain£27,000

At 18% (basic-rate band)£1,849

At 24% (higher rate)£4,015

Total CGT due£5,864

How it works

Gains above the annual exempt amount are taxed by stacking them on top of your income. Any part of the gain that falls within your remaining basic-rate band is taxed at the lower rate; the rest is taxed at the higher rate.

Losses are applied in a set order: same-year losses come off your gains first — in full, even if that wastes the annual exempt amount — then the allowance is applied, and finally losses brought forward from earlier years are used only to bring the remaining gains down to the allowance, preserving it. Anything unused carries forward to future years.

Following the October 2024 changes, the main rates and residential property rates are now aligned at 18% and 24%. Capital Gains Tax is not devolved, so the same UK rates apply to Scottish taxpayers.

← All calculators