Capital Gains Tax Calculator (UK) — 2025/26 Rules
Drop in your sale price, what you originally paid, and your other taxable income for the year. The calculator applies the £3,000 Annual Exempt Amount and splits the remaining gain across the 18% basic-rate and 24% higher-rate CGT bands — using the post-October-2024 Budget rates that now apply to shares and residential property alike.
Related calculators
How UK CGT works in 2025/26
The Annual Exempt Amount (AEA) shields the first £3,000 of gains each tax year. That's a huge cut from the £12,300 you got in 2022/23 — slashed to £6,000 in 2023/24, then £3,000 from 2024/25 onwards. Use it or lose it — there's no carry-forward.
Rates after the October 2024 Budget: 18% on the portion of taxable gain that falls within the basic-rate income band, 24% above. Residential property is now taxed at the same 18%/24% rates as other assets — the Budget equalised them. Disposals of UK residential property still need to be reported and paid within 60 days via HMRC's UK Property service.
Estimates only. Scottish Income Tax bands differ slightly. EIS/SEIS, BADR, principal private residence relief, and other reliefs are not modelled. Talk to an accountant before significant disposals.