Resources – Capital Gains Tax Calculator

Quickly work out your Capital Gains Tax.
Enter your income and sale details to see your estimated CGT instantly.

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Enter your figures to see an estimate of your Capital Gains Tax in seconds.
Just input your taxable gain and asset sale details, we’ll do the rest.

How it works:

  • You enter your taxable gain and asset sale details
  • We apply 2025/26 allowances and rates for you
  • We calculate the estimated CGT you’ll owe
This calculator works for Capital Gains Tax on residential property and other chargeable assets, such as shares or cryptocurrency.
Change the figures to see how different circumstances can affect your tax liability.
Fast, easy and a great way to see what to expect before you file.
Capital Gains Tax calculator
Tax year 2025/26
£
Used to split gain across basic/higher CGT bands (basic band width assumed £37,700).
£
£
£
£
£
£
BADR/Investors’ Relief taxed at 14% from 6 Apr 2025. Enter the qualifying portion.
£
Annual Exempt Amount is £3,000 per person. Basic-rate band width used for CGT split: £37,700.
Your result
Residential CGT 18% / 24% • Other assets 18% / 24%
Raw gain
£0
Less: losses used
£0
BADR qualifying
£0
Annual allowance used
£0
Chargeable gain
£0
Band split…
Tax on BADR portion (14%)
£0
Tax on bands
£0
Total CGT due
£0
How it’s worked out
Gain = Proceeds − (Cost + buying/selling costs + capital improvements). Subtract any allowable losses. If BADR is ticked, the qualifying amount is taxed at 14% first. Then subtract the Annual Exempt Amount (£3,000) from the non-BADR portion and split the remainder across basic/higher CGT rates using your taxable income (after PA) to work out basic-band headroom.
Assumptions: Individuals, UK resident; estimates only. BADR lifetime cap not tracked here. Check HMRC guidance for your situation.

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