Important Dates for UK
Crypto Tax Season (2025-2026)
Stay ahead of these critical deadlines. Plan early to ensure compliance with crypto tax UK deadlines.
October 5, 2025
Register for self-assessment if you're a first-time filer.
January 31, 2026
Deadline for filing online self-assessment tax returns for 2024-2025.
January 1, 2026
CARF data collection begins - RCASPs start tracking all crypto transactions.
Free Checklist UK Crypto
Tax Filing Checklist
Download your checklist of required documents for UK Crypto Tax Filing:
UK Crypto Tax Forms
Stay ahead of these critical deadlines. Plan early to ensure compliance with crypto tax UK deadlines.
| Form | Who is this for? | What does this include? | View form |
|---|---|---|---|
| SA100 (Self Assessment Tax Return) | For individuals in the UK who need to report income and capital gains from crypto transactions as part of their annual tax return. | Includes sections for declaring various types of income, including crypto-related earnings such as mining, staking, and other income sources. | View |
| SA108 (Capital Gains Summary) | For taxpayers who have made capital gains from selling, trading, or disposing of crypto assets that exceed the £3,000 annual allowance. | Includes detailed capital gains calculations, disposals, acquisition costs, and allowable expenses for crypto transactions. | View |
| Cryptoassets Section (SA100) | For all UK crypto holders reporting transactions in the 2024-25 tax year onwards. | New dedicated section within SA100 for reporting crypto disposals, exchanges, and transfers. Simplifies reporting for standard crypto activities. | View |
How Kryptos Solves
Your Crypto Tax Challenges
Simplified UK Tax Filing
Automatically import and categorize transactions for effortless compliance with HMRC rules and Section 104 pooling.
Advanced Tax Strategies
Maximize savings with tax loss harvesting (30-day rule compliant) and personalized tax insights.
Tailored for UK Compliance
Generate HMRC-ready SA100 and SA108 reports, and stay ahead of the UK's evolving crypto tax laws and CARF requirements.
Data Security at Its Best
End-to-end encryption ensures your financial data is safe and compliant with UK GDPR regulations.
Get started in 3 simple steps
Step 0
1
Sign in or Sign up
Effortlessly connect all your wallets, exchanges, and digital assets in one unified platform. Gain complete visibility and control over your Web3 financial portfolio.
Get started
Step 0
2
Connect your accounts
Automatically categorise all your crypto transactions with precision, ensuring seamless compliance with UK tax regulations. Stay ahead with accurate reporting.
Get started
Step 0
3
Generate reports in secs
Generate HMRC-ready reports with ease, including detailed insights into when and how to pay taxes on your crypto holdings in the UK.
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KEY FEATURES
Faster, Smarter.
Unlike any tool you’ve used before.
Experience unparalleled efficiency with Kryptos, a unique tool designed to enhance your web3 finance management.
HMRC-Compliant Reports
Generate detailed reports adhering to cryptocurrency tax UK regulations, including the Average Cost-Basis method, to avoid penalties.
5000+ Integrations support
Sit back and relax as we offer custom integration support as well.
Kraken
Bitcoin
Ethereum
Coinbase
MetaMask
Kraken
Bitcoin
Ethereum
Coinbase
MetaMask
Kraken
Bitcoin
Ethereum
Coinbase
MetaMask
SafePal
1inch
Avalanche
Polygon
Kucoin
SafePal
1inch
Avalanche
Polygon
Kucoin
SafePal
1inch
Avalanche
Polygon
Kucoin
Uniswap
Binance
Crypto.com
Gate.io
Nexo
Uniswap
Binance
Crypto.com
Gate.io
Nexo
Uniswap
Binance
Crypto.com
Gate.io
Nexo
Solana
Helium
Bitstamp
MEXC
Crypto.com
Solana
Helium
Bitstamp
MEXC
Crypto.com
Solana
Helium
Bitstamp
MEXC
Crypto.com
Real-Time Portfolio Insights
Track your investments in real-time, ensuring informed decisions while staying compliant with tax on cryptocurrency UK regulations.
Harvest Losses
Kryptos Tax Loss Harvesting feature helps you "turn losses into gains"
Comprehensive Tax Support: SA100 and SA108 Reporting
Generate HMRC-ready reports for SA100 and SA108 with Kryptos. Accurately calculate income, capital gains, and losses to make your Self Assessment seamless.
Get your reports now
Seamlessly Migrate from Other
Crypto Tax Software
Export Your Data
Download your transaction data or reports from your current crypto tax software in a common format like CSV or API.
Import to Kryptos
Upload your data or connect wallets and exchanges directly. Kryptos auto-organizes everything for accurate tracking and reporting.
Optimize and Start
Review your imported data, optimize for tax savings, and start managing your crypto taxes effortlessly with Kryptos.
Switch to Kryptos now
Feel free to reach out via live chat.
CARF-Ready
Get CARF-Ready Before 2026
From January 2026, all UK-serving crypto platforms must report your
transactions to HMRC. Kryptos helps you prepare.
transactions to HMRC. Kryptos helps you prepare.
What is CARF?
he Crypto-Asset Reporting Framework means automatic exchange of your crypto transaction data between platforms and tax authorities starting 2026.
What Gets Reported?
Personal details (name, address, NI number)
All crypto-to-fiat and crypto-to-crypto trades
Transfers to external wallets
Fair market values at transaction time
How Kryptos Helps
Ensure your historical compliance is perfect before CARF reporting begins. Identify gaps, file corrections, and optimize your tax position now.
Comprehensive Tax Support:
SA100 and SA108 Reporting
Generate HMRC-ready reports for SA100 and SA108 with Kryptos. Accurately calculate income, capital gains, and losses using Section 104 pooling to make your Self Assessment seamless.
What We Calculate:
Capital gains and losses using Section 104 pooling
Same-day and 30-day matching rules automatically
Allowable costs (exchange fees, wallet fees, gas fees)
Split tax year calculations (2024-25)
Income tax on staking, mining, and earning rewards
£3,000 CGT allowance tracking in real-time
Export Formats:
PDF reports for accountants
CSV transaction logs
Pre-filled SA108 capital gains summary
Detailed transaction history with GBP conversions
Tax year summaries
Built Specifically for UK Tax Rules
Generate HMRC-ready reports for SA100 and SA108 with Kryptos. Accurately calculate income, capital gains, and losses using Section 104 pooling to make your Self Assessment seamless.
Section 104 Pooling
Automatically calculates average cost basis for each crypto asset using HMRC's Section 104 method.
Same-Day Matching
Identifies and matches purchases and sales made on the same day, as required by HMRC.
30-Day Rule Compliance
Tracks repurchases within 30 days and applies the "Bed and Breakfast" rule correctly.
Split Tax Year 2024-25
Handles the October 30, 2024 rate change automatically, applying 10%/20% before and 18%/24% after.
Don't Wait Until HMRC Comes Knocking
With CARF reporting starting in 13 months and HMRC sending record numbers of warning letters, now is the time to get your crypto tax affairs in order.
Join thousands of UK crypto investors who trust Kryptos for accurate,
HMRC-compliant tax reporting.
Join thousands of UK crypto investors who trust Kryptos for accurate,
HMRC-compliant tax reporting.
No credit card required • 30-day money-back guarantee • GDPR compliant
Frequently asked questions
Do I need to pay tax on crypto in the UK?
Yes. HMRC treats crypto as property, subject to Capital Gains Tax when you sell, trade, spend, or gift it (except to spouse). Income Tax applies to mining, staking, and other crypto earnings.
What's the UK crypto tax-free allowance for 2025-26?
The Capital Gains Tax allowance is £3,000 for the 2025-26 tax year. Only gains above this threshold are taxable at 18% (basic rate) or 24% (higher rate).
When does CARF reporting start?
CARF data collection begins January 1, 2026. Reporting Crypto-Asset Service Providers (RCASPs) will track all transactions throughout 2026. The first reports will be exchanged between tax authorities in 2027.
What information will platforms report under CARF?
RCASPs must report your personal details (name, address, DOB, NI number) plus all crypto-to-fiat exchanges, crypto-to-crypto trades (with fair market values), transfers to external wallets, and retail payments over £50,000.
How does Kryptos handle Section 104 pooling?
Kryptos automatically calculates your average cost basis for each crypto asset using HMRC's Section 104 pooling method, applies same-day and 30-day matching rules, and generates accurate SA108 reports.
Can I still use tax loss harvesting in the UK?
Yes, but you must follow HMRC's same-day and 30-day matching rules. Kryptos automatically accounts for these rules when calculating your tax optimization strategies, ensuring full compliance.
What happens if I received an HMRC nudge letter?
Don't ignore it. Use Kryptos to calculate your accurate tax position, then file a voluntary disclosure if needed. This typically results in lower penalties (0-10%) than waiting for HMRC investigation.
Do I need to report crypto even if I didn't sell?
You must report when you dispose of crypto (sell, trade, spend, gift). You need to file if total disposals exceed £50,000 OR gains exceed £3,000. However, HMRC expects you to keep records of all transactions, even if just holding.