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UK crypto tax calculator
Generate your UK crypto tax return in 10 minutes.
Connect every wallet, exchange and chain. Kryptos applies HMRC's Section 104 pooling rules, generates the right HMRC forms, and gives you an audit trail your accountant will accept.
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Kryptos for everyone in UK
Filing your own return, running a company’s books, or building on our data. Start where you fit.
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Everything for crypto tax in UK
Pick the tool for where you are: work out what you owe, file with the right forms, or hand it to an accountant.
UK crypto tax software
Import every exchange and wallet, then generate a HMRC-ready report in minutes.
See the softwareUK crypto tax calculator
Estimate your gains and what you owe before you file.
Open the calculatorUK crypto tax guide
How crypto is taxed in UK: the rates, the deadlines, and the edge cases that trip people up.
Read the guideCARF and DAC8 reporting
For exchanges and custodians that report under CARF in UK.
See CARF reportingFind a crypto accountant
Vetted crypto tax accountants and CPAs who work in UK.
Browse accountantsGet started in 3 simple steps
- 1
Sign in / sign up
Create an account and sync your wallets, exchanges and DeFi positions in one place.
- 2
Connect your accounts
5,500+ integrations across CEXs, DEXs, wallets and chains. Kryptos auto-classifies every transaction.
- 3
Generate your HMRC report
Pick your report, download SA100 and SA108-ready outputs, and file. Most users hand the export to their accountant.
Built for UK crypto tax filing
Every nuance HMRC expects, encoded in software so you don't have to memorise it.
Section 104 pooling, automatic
Kryptos applies HMRC's share-pooling rules across every disposal so your cost basis is right the first time.
Same-day and 30-day rules
Bed-and-breakfasting rules applied automatically. We flag the events HMRC treats as same-day or 30-day matches so you don't double-count.
SA100 and SA108 ready
Generate a report formatted to drop straight into your self-assessment, capital gains, and miscellaneous income boxes.
CARF-ready (2026)
Transaction-level reporting aligned with the Crypto-Asset Reporting Framework. Wallet transfers and fair-market valuations tracked end to end.
Every tax form HMRC accepts
SA100 (self-assessment)
SA108 (capital gains)
Important UK crypto tax dates (2025 to 2026)
5
Oct2025
Register for self-assessment if you're a first-time filer.
31
Jan2026
Deadline to file your 2024 to 2025 online self-assessment and pay any tax owed.
1
Jan2026
CARF data collection begins. UK-regulated crypto-asset service providers start tracking transactions.
Free download
Free UK crypto tax filing checklist
Every document HMRC expects, listed in the order you'll need it. Built for self-filers and accountants alike.
We email the PDF straight away. No spam, unsubscribe any time.
Start your UK crypto tax return now
Beat the January 31 HMRC deadline. Generate Section 104 compliant reports in minutes.