Capital Gains Tax · 2023/24
Capital Gains Tax on £100,000 (2023/24) — UK CGT Calculator
On a £100,000 non-residential gain in the 2023/24 tax year, after deducting the £6,000 Annual Exempt Amount, the taxable portion was £94,000. A basic-rate taxpayer paid £9,400 at 10%; a higher-rate taxpayer paid £18,800 at 20%.
Breakdown (2023/24, non-residential)
How CGT worked on £100,000 in 2023/24
Capital Gains Tax is charged on the profit from disposing of an asset that has risen in value. For 2023/24 the Annual Exempt Amount was £6,000 — the first slice of total annual gains was tax-free. Above that, the rate depended on the asset type and where the gain landed when stacked on top of your other taxable income.
Assuming the headline scenario of around £30,000 of other taxable income, most of a £100,000 gain falls within the basic-rate band — giving a 10% non-residential CGT charge of £9,400. If your income plus the gain crosses the basic-rate ceiling, the spill-over slice is taxed at 20% — taking the bill up toward £18,800.
Residential property gains were taxed at 18% / 28.00% in 2023/24 — see the residential row above. Note the October 2024 reform: from 30 October 2024 non-residential CGT rates jumped from 10/20% to 18/24%, aligning with residential. Read the full timeline in the UK CGT allowance history guide.
What was different about 2023/24
2023/24 was the first year of the post-Mini-Budget AEA cut: £12,300 → £6,000. CGT rates themselves were unchanged — 10/20% on non-residential gains and 18/28% on residential — but the smaller exemption pulled many smaller share/crypto disposals into charge for the first time.
Same £100,000 gain across years
On a £100,000 gain at the basic rate you would have paid £17,460 in 2024/25 and £17,460 in 2025/26, compared with £9,400 in 2023/24.