Quick answer
Capital Gains Tax Calculators is an independent UK website. It publishes free calculators and plain-English guides on Capital Gains Tax for UK taxpayers. We are not part of HMRC, GOV.UK or any government body, and we do not give personal tax advice. Every rate and rule we use comes from official UK sources, and the way our calculators work is explained on our methodology page.
Key facts
- Independent, UK-only website about Capital Gains Tax.
- Free calculators for property, shares, crypto, reliefs, inheritance, gifts and more.
- Built on official HMRC and GOV.UK rules, set out on our methodology page.
- Not affiliated with HMRC and not a source of regulated advice.
What this website is for
Capital Gains Tax is a tax that many people pay once or twice in a lifetime, usually when they sell a second home, a rental property, shares or crypto. The rules are detailed, the official guidance is spread over many pages, and a mistake can be expensive. This website exists to make the subject easier to understand and the sum easier to do. We publish calculators that show their working and guides that explain the rules in plain English, with examples that use real figures.
Everything on the site is written for the UK. We use pounds sterling, the UK tax year from 6 April to 5 April, British English and the terms used by HMRC. We do not cover tax in other countries.
What we publish
We publish two kinds of pages. The first is a set of calculators. They cover property, shares, the Section 104 share pool, crypto, Private Residence Relief, Business Asset Disposal Relief, inherited property, gifted property, spouse transfers, the 60-day deadline and the effect of timing a sale. The second is a library of guides on rates, the annual allowance, losses, exemptions, reliefs, trusts, divorce, non-residents and how to report a gain to HMRC. Each guide has worked examples, tables, common mistakes, answers to ten common questions and links to the official GOV.UK pages it relies on.
How we keep our content accurate
Our approach has four parts.
- One source for the numbers. The tax rates, allowances and limits that appear in the guides are the same ones the calculators use. They are held in one place, so a figure cannot say one thing in a guide and another in a calculator.
- Official sources first. We base our content on HMRC and GOV.UK guidance and on the legislation. Each guide lists the official pages it draws on.
- Worked examples are calculated, not estimated. The examples in our guides are produced by the same calculation engine as the calculators, so you can check them by entering the same figures.
- Review. Pages are reviewed for accuracy and clarity by David Mitchell, and corrections are made as soon as we find an error.
You can read the full detail on our methodology page.
What we do not do
We do not give personal tax advice, and we are not a regulated financial adviser. A calculator gives an estimate based on the figures you enter and the rules as we understand them. Your own situation may include facts that we cannot see. For large gains, trusts, businesses or anything unusual, you should check with HMRC or a qualified tax adviser. Please read our disclaimer before relying on any figure.
Independence
This website is independent. It is not run by HMRC, it does not speak for HMRC, and it is not endorsed by HMRC or by any government department. When we describe how HMRC treats something, we link to the official page so that you can read it yourself.
Corrections and feedback
Tax rules change, and we want our pages to be right. If you spot an error, an out-of-date rule or something that is unclear, please tell us at ihosting78@gmail.com. Say which page you were reading and what you think is wrong. We would rather hear about a mistake than leave it on the site. See our contact page for more.