Capital Gains Tax Calculator — 2026/27
What is the Capital Gains Tax Calculator?
Capital Gains Tax (CGT) is the tax on the profit when you sell or dispose of an asset that has gained in value. For 2026/27, the annual exempt amount is £3,000. From 30 October 2024, residential-property gains are taxed at 18% (basic rate) and 24% (higher rate); other gains at 18% / 24% from the same date.
Last reviewed: against HMRC rates for 2024/25 & 2025/26.
CGT rates — disposals from 30 October 2024
Worked example
Sell shares for a £15,000 gain in 2025/26 as a higher-rate taxpayer: deduct £3,000 allowance → £12,000 taxable × 24% = £2,880 CGT.
Frequently asked questions
+What is the CGT allowance for 2025/26?
£3,000 per individual (£1,500 for most trustees) — gains within the allowance are tax-free. The allowance has been cut sharply from £12,300 in 2022/23.
+Do I pay CGT on my main home?
Usually no — Private Residence Relief exempts gains on your only or main residence. Restrictions apply if part is let, used for business, or grounds exceed 0.5 hectares.
+How is CGT calculated?
Gain = sale proceeds − cost − allowable expenses. Subtract the £3,000 annual allowance, then apply 18% or 24% depending on whether the gain falls in your basic-rate band when added to taxable income.
+When do I report and pay CGT?
UK residential-property gains: within 60 days of completion via the HMRC Capital Gains on UK Property service. Other gains: through Self Assessment by 31 January after the tax year ends.