Skip to main content
Partner
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.

Read the UK guide

No credit card required · 4.8/5 on SourceForge · SOC 2 Type II

Explore Kryptos

Kryptos for everyone in UK

Filing your own return, running a company’s books, or building on our data. Start where you fit.

IndividualsTrack your portfolio and file your crypto taxes in UK.BusinessesOn-chain accounting, treasury, and compliance for companies.AccountantsManage client crypto books and filings in one place.DevelopersCrypto tax and portfolio data through the Kryptos Connect API.

Trusted by leading investors and partners

Binance LabsGATE VENTURESBitstampHyperliquidLedgerTrezorTelosRocketXSwedish Blockchain AssociationMEMBER OF INATBABinance LabsGATE VENTURESBitstampHyperliquidLedgerTrezorTelosRocketXSwedish Blockchain AssociationMEMBER OF INATBA
Explore

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 software

UK crypto tax calculator

Estimate your gains and what you owe before you file.

Open the calculator

UK crypto tax guide

How crypto is taxed in UK: the rates, the deadlines, and the edge cases that trip people up.

Read the guide

CARF and DAC8 reporting

For exchanges and custodians that report under CARF in UK.

See CARF reporting

Find a crypto accountant

Vetted crypto tax accountants and CPAs who work in UK.

Browse accountants

Get started in 3 simple steps

  1. 1

    Sign in / sign up

    Create an account and sync your wallets, exchanges and DeFi positions in one place.

  2. 2

    Connect your accounts

    5,500+ integrations across CEXs, DEXs, wallets and chains. Kryptos auto-classifies every transaction.

  3. 3

    Generate your HMRC report

    Pick your report, download SA100 and SA108-ready outputs, and file. Most users hand the export to their accountant.

Not sure if you owe crypto tax?

Answer a few quick questions and see which of your crypto activities are taxable, and whether it counts as capital gains or income.

Check in 30 seconds

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.

See pricing