Crypto tax · UKCrypto tax software for the UK
Kryptos applies HMRC's Section 104 pooling and the 30-day rule automatically, then produces a Self Assessment-ready report with your £3,000 CGT allowance already taken into account.
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INATBA
INATBAHow crypto is taxed
In the UK, HMRC treats most crypto as an asset, so disposing of it triggers Capital Gains Tax, and a disposal is broad: selling for pounds, swapping one coin for another, spending it, and gifting to anyone but your spouse all count. The annual exempt amount has shrunk to £3,000 for 2025/26, down from £12,300 two years earlier. Gains above it are taxed at 18% within your basic rate band and 24% above, the rates that took effect on 30 October 2024. Earned crypto is different: mining, staking, employment tokens and some airdrops are income at their pound value on the day you receive them.
Working out the gain is fiddly because HMRC uses Section 104 pooling, with two matching rules on top: buys on the same day as a disposal match first, then anything bought within the following 30 days under the bed-and-breakfasting rule, before the pool is touched. The tax year ends 5 April, and online returns and payment are due by the following 31 January. HMRC already receives exchange data and sends nudge letters, and CARF reporting begins from January 2026. Kryptos imports your UK exchanges and wallets, applies pooling and the 30-day rule for you, keeps income separate from gains, and produces a Self Assessment-ready report.
File crypto tax in 3 simple steps
- 01
Sign in or sign up
Create your Kryptos account in under a minute. Sign in with email, Google, or your existing wallet. Skip the credit card; the first 100 transactions are free, no trial period to remember.
- 02
Connect your accounts
Bring every wallet, exchange, and chain into one place. Connect via OAuth for exchanges that support it, via API key for the long tail, or by wallet address for any chain we index. 5,500+ integrations out of the box; missing one is a 24-hour support ticket.
- 03
Generate reports in minutes
Download an audit-ready UK tax report. We generate sa100 and sa108 and surface every taxable event HMRC expects to see.
Built for everyone in UK
Whether you're filing your own return or running close for a fund, the same Kryptos data layer sits underneath.
For individuals
Track every wallet, exchange, and chain you've touched. Kryptos pulls your UK transactions automatically, flags taxable events, and generates sa100 and sa108 ready for HMRC. Free for the first 100 transactions.
For accountants
Manage every client's UK crypto activity from one workspace. Onboard in three minutes, white-label PDFs that reconcile to what HMRC expects, free client licences when you bring them in.
For enterprises
Multi-entity UK treasury and accounting, HMRC-ready every month. Map on-chain activity to your existing chart of accounts. SOC 2 Type II, role-based access, real support.
For developers
Ship crypto-financial features without rebuilding the data pipeline. Kryptos Connect: balances, cost basis, and clean transaction history across 5,500+ integrations behind one API.
Smart features to handle your crypto taxes
Automated gain & loss calculations
Track your entire portfolio, PnL and tax liability in one place.
Tax-loss harvesting
Turn losses into gains with real-time harvesting recommendations.
Bank-grade security
End-to-end encryption, multi-factor auth, and SOC 2 Type II compliance.
Flexible data import
API, CSV, and wallet-auth. Connect 5,500+ integrations the way that works for you.
Error reconciliation
Catch discrepancies in your crypto transactions before they reach the tax authority.
Trusted Partner for Crypto Tax Software UK
We've got you covered. Compare crypto tax software today.
| Feature | Kryptos | Koinly | CoinLedger | CryptoTaxCalculator | CoinTracker |
|---|---|---|---|---|---|
| Country-specific tax reports | 35+ | 20+ | 12+ | 20+ | 10+ |
| Supported integrations | 5,000+ | 1,200+ | 500+ | 3,500+ | 500+ |
| DeFi & NFT auto-classification | |||||
| Tax-loss harvesting recommendations | |||||
| Error reconciliation tooling | |||||
| Audit-ready reports | |||||
| API / CSV / wallet-auth import | |||||
| Free tax report preview | |||||
| SOC 2 Type II |
Enterprise-grade platform built to scale
- Advanced end-to-end encryption in place.
- Secure access with multi-factor authentication.
- Regular security audits for the highest level of data protection and privacy.
- Our application only requires read-only access to your data.
Crypto tax in the UK: common questions
- Do I have to pay tax on crypto in UK?
Yes. HMRC treats most crypto disposals as taxable events: selling for fiat, swapping one coin for another, spending on goods, or earning yield. Capital-gains rules apply to trading; income rules apply to staking, mining, and airdrops. The exact rate depends on your holding period and bracket.
- Which crypto activities are taxable in UK?
HMRC considers these taxable: disposing crypto for fiat or another crypto, spending crypto on goods or services, receiving staking or mining rewards, getting airdrops, and earning DeFi yield. Transfers between your own wallets aren't taxable. Kryptos auto-classifies each transaction and applies the right treatment.
- What tax forms do I need to file in UK?
For UK returns, Kryptos generates sa100 and sa108. We export them as PDF for record-keeping, CSV for accountants, and tax-software-compatible files where supported. Every line traces back to the source transaction so HMRC questions are answered by your audit trail.
- Does Kryptos support DeFi, NFTs, and staking?
Yes. We support 150+ blockchains and 5,500+ integrations (across DeFi, CEX, wallets, NFTs and on-chain like Uniswap, Aave, Lido, and Curve, plus the major NFT marketplaces). Each is mapped to the right HMRC treatment: LP-token cost basis, NFT mint and sale events, staking-reward income, governance distributions, perpetual funding rates.
- What happens if HMRC audits me?
Every transaction Kryptos classifies has an audit trail back to the source: the cost-basis method applied, the exact disposal sequence, and the on-chain or exchange reference for each line. SOC 2 Type II certified means our controls are independently verified. Most clarification requests resolve from the report itself.
- How much does Kryptos cost in UK?
Free for your first 100 transactions across every supported jurisdiction. Paid plans start when your activity exceeds that and unlock unlimited transactions, multi-year tax reports, and priority support. See pricing for the current breakdown.
Take Kryptos with you.
Track your portfolio, watch new transactions land, and check your tax position from your phone. Same account, same data, anywhere you are.
Building something on crypto data? Use the same engine.
Kryptos Connect is the API behind Kryptos itself. One call gets you reconciled balances, tax-aware cost basis, and clean transactions across 5,500+ integrations. Embed it in your fintech, accounting product, or wallet.
Start filing your UK crypto taxes in minutes.
No credit card required. Free reports, every supported jurisdiction.