This page names no product and links to none. What it does is set out, from HMRC's own words, the output a UK filer needs at the end of a tax year, because the useful way to judge any tool is against the guidance it has to satisfy, and that guidance is short enough to quote in full here.
Two reporting routes, and the tool has to fit one
The selling guidance names them: read guidance on how to report and pay your Capital Gains Tax by either “completing a Self Assessment tax return at the end of the tax year” or “using the Capital Gains Tax real time service”. Those are different workflows with different timing, so an export shaped for one is not automatically usable for the other.
Per-transaction gains, with a 30-day exception
HMRC is explicit that the unit of work is the transaction: “You need to work out your gain for each transaction you make.” Then the exception that breaks naive arithmetic: “the way you work out your gain is different if you sell tokens within 30 days of buying them.” Any tool that matches disposals to acquisitions has to implement that ordering, not just total the year.
Disposals are wider than selling
The same page lists what counts: you may need to pay Capital Gains Tax on a gain when you dispose of cryptoasset tokens by selling them, exchanging them for a different type of cryptoasset, using them to pay for goods or services, or giving them to another person, unless the gift is to a spouse, civil partner or charity. A tool that only imports fiat sales will miss three of the four.
Income is a separate calculation, with its own allowance
Received tokens are not a capital gains question. Where they come from mining, staking or lending, including from DeFi, and the holder is not trading, HMRC treats them as other taxable income. The receiving guidance also names an allowance: up to £1,000 each tax year for trading and miscellaneous income, and cryptoasset income counts towards it.
What the guidance does not give you
It names the Capital Gains Tax tax-free allowance and links onward but states no rate on this page, and it gives the tax year as 6 April to 5 April without a filing date. So the two figures a person most often wants from a tool, the rate applied and the deadline, come from general guidance this site has not read, not from the cryptoasset pages.
Questions people ask about crypto tax software uk
Does HMRC approve or recognise crypto tax software?
Nothing on the two cryptoasset guidance pages read here names, approves or lists a product. This site records that as not published on those pages, and it names no product itself.
What is the 30-day rule a UK tool has to implement?
The selling guidance says the way you work out your gain is different if you sell tokens within 30 days of buying them. It is a matching rule about which acquisitions a disposal is set against, and it changes the gain rather than disallowing anything.
Do staking rewards go through the same calculation as sales?
No. Tokens received from mining, staking or lending, DeFi included, are treated as other taxable income where the recipient is not carrying on a trade, so they sit outside the capital gains computation entirely.
Is there an allowance that covers small crypto income?
The receiving guidance names one: up to £1,000 of allowance each tax year for trading and miscellaneous income, and income earned from cryptoassets counts towards it. It is an allowance against income, not against gains.