Last updated: 29 September 2026.
This page explains how the guides on CryptoTaxCheck are written, checked and corrected. Tax is a subject where mistakes cost people money, so we would rather be plain about our process, including the parts that are not finished yet.
Where our information comes from
Every guide starts from primary sources: GOV.UK guidance and the HMRC Cryptoassets Manual. Rates, allowances, thresholds and deadlines are taken from GOV.UK and HMRC, and each guide lists the pages it relies on in its sources, so you can read the original and check our wording against it.
Guides are written by Andrew Pickett, the founder. See the about page for who is behind the site.
Dates and updates
Each guide shows a "last reviewed" date. That date is when we last checked the guide against the sources it cites. When we find that a rate, allowance, deadline or HMRC position has changed, we update the guide and change the date.
We do not promise a fixed review schedule. If you are relying on a figure for a tax return, check the linked GOV.UK page too.
Corrections
If you think something on the site is wrong, tell us through the contact page. Say which page it is on and, if you can, link to the GOV.UK or HMRC page that shows the correct position. We will check it, fix the guide if you are right and update the last-reviewed date.
How the calculator is tested
The tax engine behind the calculator is tested against worked cases: the pooling example on GOV.UK and the examples in the HMRC Cryptoassets Manual, along with edge cases such as the change in Capital Gains Tax rates part way through 2024/25. The tests are part of the project's automated test suite. Our methodology page sets out the rules the engine applies and where its limits are.
Affiliate links
Some pages carry labelled affiliate links to tax software, and we may earn a commission if you buy through them. Those links do not decide what we write. We say where our own tool is the better fit, and we do not carry links to crypto exchanges or investment promotions. The full details are in our affiliate disclosure.
Reviewer
We plan to have the engine's test cases and our guides reviewed by a qualified UK tax professional. The named reviewer will appear here once confirmed, and on each guide under "Reviewed by". We have not set a date. Until then, guides say the reviewer is not yet confirmed, and nothing on this site should be read as having been signed off by a professional.
What this site is not
CryptoTaxCheck is independent of HMRC and gives general information, not personal tax advice. See the disclaimer.
Sources
Written by Andrew Pickett
Founder of CryptoTaxCheck. Every guide cites GOV.UK and the HMRC Cryptoassets Manual, uses figures consistent with the calculator’s golden tests, and shows when it was last reviewed. An independent, qualified UK tax reviewer will be credited here once confirmed.
Last reviewed About CryptoTaxCheckHow the calculation works
Related reading
- ReadAbout CryptoTaxCheck — Who We Are and Why We Built ItWho runs CryptoTaxCheck, why we built a rule-transparent UK crypto tax calculator that runs in your browser, and how our guides are reviewed.Read
- ReadMethodology: How CryptoTaxCheck Applies HMRC's Crypto RulesHow our calculator works: rates and allowances with sources, taxable events, same-day, 30-day and section 104 matching, valuation, losses and limits.Read
- ReadAffiliate Disclosure: How CryptoTaxCheck Earns MoneyHow CryptoTaxCheck makes money: paid reports and a labelled affiliate relationship with Koinly. What we earn, how links are marked and what we never do.Read
- ReadContact CryptoTaxCheck: Help, Corrections and PrivacyHow to contact CryptoTaxCheck for help with a report, a correction to a guide, a privacy request or a security issue. We cannot give personal tax advice.Read
This is general information, not personal tax advice. You are responsible for your own return; if your situation is complex, speak to a qualified adviser. See our disclaimer.