Crypto Tax Reporting Requirements and What they Mean for the UK

From 1 January 2026, crypto platforms in the UK and across the EU will start collecting far more tax-relevant customer and transaction data than before. This is not a new “crypto tax”. It is a new crypto tax reporting system that gives tax authorities better visibility of crypto activity, particularly where money moves across borders.

For many people, the impact will feel practical rather than theoretical. You will see tougher onboarding questions, more follow-up requests, and regular reviews of your account information. If you have crypto gains or income, the days of “HMRC will never see it” thinking are ending fast.

What CARF means for the UK

The UK is implementing the Crypto-Asset Reporting Framework (CARF), designed by the OECD, through UK regulations and guidance on how to report crypto tax to HMRC.

In plain terms, CARF requires reporting cryptoasset service providers to:

• identify users
• verify tax residence details
• track reportable transactions
• submit annual reports to HMRC

HMRC has also confirmed domestic reporting will cover UK resident customers using UK-based reporting providers, so the information is not only for non-UK customers. 

What DAC8 means for Europe

Across the EU, DAC8 extends tax transparency to crypto-asset transactions.

Key points from the European Commission:

• rules enter into force on 1 January 2026
• Platforms should start collecting data on reportable transactions from that date on.
• reporting is due within 9 months after the end of the first fiscal year, which puts first reporting deadlines into 2027

Irrespective of whether your platform sits in the UK or the EU, the direction is the same: more data collection, then formal reporting.

The timeline that matters most

Here is the timeline we want clients to focus on:

• 1 January 2026: UK providers begin collecting user and transaction data under HMRC’s CARF rules.
• 1 January to 31 December 2026: first reporting period for many providers. 
• By 31 May 2027: the first UK reports are submitted to HMRC for the 2026 calendar year.
• 2027 onwards: tax authorities begin international data exchanges, depending on jurisdiction commitments.
• EU reporting deadlines: due within 9 months after year-end for the first covered year, pointing to reporting windows into 2027.

What information will platforms collect and report

You should expect platforms to request and verify details that help determine who you are and where you pay tax.

Common items include:

User identity and tax residence

• full name
• address
• country or countries of tax residence
• Tax Identification Number (TIN)
• date of birth (for individuals)

Transaction reporting

• types of cryptoassets involved
• gross proceeds or values for certain transactions
• transfer activity and related values in scope of the reporting rules 

If you do not provide the required information, penalties can apply. HMRC-linked guidance highlights penalties up to £300 in relevant cases for missing or incorrect information. 

What this means for UK crypto users

CARF does not replace your current tax duties. You still need to work out whether activity triggers Capital Gains Tax or Income Tax, then report correctly through self-assessment when required.

What changes is visibility.

HMRC guidance explains the goal is to link reported crypto activity to a taxpayer’s records, so the right tax gets paid.

You will likely notice:

• more questions when you open new accounts
• requests for your TIN and tax residence confirmation
• periodic prompts to reconfirm details
• higher audit risk where figures reported by platforms do not match your tax return

Steps to take before 1 January 2026

If you hold or trade crypto, here are sensible actions you can take now.

1) Get your records in order

• download full transaction histories from every platform you use
• save wallet transfer records and transaction IDs
• keep fee data, since fees can affect gain calculations

2) Reconcile what you did, not only what you remember

• check token-to-token swaps
• check gifts
• check crypto used to pay for goods or services

Many people miss that certain “non-cash” disposals can still trigger a taxable event. HMRC guidance on selling or disposing of cryptoassets covers core principles. 

3) Review whether you need to correct past returns

If you have historic gains or income not reported, voluntary disclosure often provides a better outcome than waiting for HMRC contact. HMRC provides routes for paying unpaid tax on cryptoassets. 

4) Plan for 2025/26 reporting early

If you trade actively, consider quarterly record checks. It reduces the year-end scramble and cuts errors.

What this means for crypto platforms and businesses

If you operate a UK cryptoasset platform, the starting point is simple: data collection and due diligence begin from 1 January 2026 under HMRC guidance. 

The UK framework sits in law through the 2025 regulations, with registration and penalties built in. Practical priorities for providers as per requirements for crypto tax reporting include:

• mapping required data fields
• building tax residence and TIN capture into onboarding
• due diligence processes to validate user information
• reporting file preparation and controls for annual submission 

If you operate in the EU, DAC8 creates similar demands, with collection from 1 January 2026 and reporting timelines into 2027. 

How We Help You Navigate Crypto Tax Reporting

Apex Accountants help individuals and businesses prepare for CARF and DAC8 and report crypto tax to HMRC with practical, tax-led support.

For crypto investors

• Capital Gains Tax calculations for disposals, swaps, gifts, and withdrawals
• income reviews for staking, rewards, airdrops, mining, and employment-linked tokens
• Self-assessment support and report preparation
• record clean-up where histories sit across multiple platforms

For crypto businesses and platform operators

• readiness reviews for HMRC reporting expectations.
• user data and due diligence process design.
• governance, controls, and reporting workflow support
• advisor support for year-end reporting preparation and internal checks

If you want a clear plan before 1 January 2026, book a consultation with Apex Accountants.

FAQs

Does CARF introduce a new UK crypto tax?

No. CARF is a reporting and information-sharing framework. Your existing UK tax duties still apply. 

When will HMRC receive the first reports?

HMRC guidance indicates the first report covers 1 January to 31 December 2026, then it is due by 31 May 2027.

What will platforms ask me for?

Expect tax residence details and a TIN, plus identity data used to verify you. HMRC-linked commentary also notes penalties where required info is not provided. 

Does DAC8 change reporting across the EU?

Yes. DAC8 expands EU automatic exchange rules to crypto-asset transactions, with rules in force from 1 January 2026 and reporting timelines into 2027. 

Conclusion

From 1 January 2026, the requirements for crypto tax reporting move into a new phase in the UK and Europe. Platforms will collect more data, tax authorities will receive more reports, and cross-border information sharing will increase. 

If you invest in crypto, the best move now is simple: tidy your records, confirm your tax position, and then report consistently. If you run a crypto business or platform, treat 2026 data capture like a live compliance project starting on day one.