Quick Answer
The Crypto-Asset Reporting Framework (CARF) is a global tax reporting system for cryptocurrency transactions. In the UK, CARF rules took effect on 1 January 2026, requiring certain crypto platforms to report user and transaction data to HMRC, with the first reports due in 2027.
Failing to comply can lead to financial penalties, so businesses should maintain accurate records, review their crypto tax reporting, and seek professional advice if needed.
Introduction
Cryptocurrency regulation is tightening, and the UK has now introduced new reporting rules designed to increase transparency around crypto transactions.
The Crypto-Asset Reporting Framework (CARF) introduces new reporting requirements that allow tax authorities to receive information about certain crypto transactions.
For crypto service providers operating in the UK, this means new obligations to collect and report information about users and transactions. For investors and businesses using crypto, it means greater transparency and increased scrutiny from tax authorities.
Preparing early can help businesses avoid compliance issues and ensure they remain aligned with HMRC reporting requirements.
In this guide, we explain what CARF is, how the new UK rules work, how they may affect businesses and investors, and the potential penalties for non-compliance.
What Is CARF?
The Crypto-Asset Reporting Framework (CARF) is an international tax reporting standard developed by the Organisation for Economic Co-operation and Development OECD).
Its purpose is to improve transparency around cryptoasset transactions and help tax authorities such as HMRC ensure that crypto-related income and gains are properly reported.
In simple terms, CARF is designed to reduce opportunities for individuals or businesses to hide crypto gains or avoid tax obligations.
CARF operates similarly to the Common Reporting Standard (CRS), which requires financial institutions to share certain account information with tax authorities internationally. However, CARF is a separate framework specifically designed for crypto.
Under CARF, participating jurisdictions exchange information about certain crypto transactions between tax authorities.
The UK has already implemented CARF-based reporting rules. UK Reporting Cryptoasset Service Providers must collect relevant data from 1 January 2026, with the first reports to HMRC due in 2027.
This means crypto service providers operating in the UK must now prepare to comply with the new reporting and due-diligence requirements.
What Types of Cryptoassets Are Covered?
CARF applies to a broad category of cryptoassets that can be held and transferred using distributed ledger technology and used for investment or payment purposes.
Examples of assets that may fall within scope include:
- Cryptocurrencies such as Bitcoin and Ethereum
- Stablecoins and other payment-focused tokens
- Certain tokenised derivatives or investment assets
- Some NFTs where they are used as investment or payment assets
However, not all digital assets are covered. For example, central bank digital currencies (CBDCs) and certain specified electronic money products are generally excluded and instead fall under other reporting standards.
Who Must Report Under CARF?
Under CARF, businesses that qualify as Reporting Cryptoasset Service Providers (RCASPs) must report. These are entities that facilitate, mediate, or process cryptoasset transactions for or on behalf of users.
These are organisations that transact cryptoassets on behalf of customers or provide platforms that enable trading, exchange, or transfer of cryptoassets.
Examples may include:
- Cryptocurrency exchanges
- Crypto brokers or dealers
- Crypto trading platforms
- Other businesses that facilitate crypto transactions on behalf of customers
While the reporting obligation primarily applies to service providers, individuals and businesses using cryptoassets must still ensure their own tax reporting is accurate and properly documented.
How CARF Impacts UK Business Owners
Even if your business is not directly involved in the crypto industry, the introduction of CARF may still affect you if your business holds, trades, or accepts cryptocurrency.
Greater Reporting Obligations
Businesses that operate crypto platforms or services may now be required to collect, verify, and report customer information and transaction data to HMRC.
This could require updates to internal systems, customer onboarding procedures, and compliance processes.
Increased Transparency for HMRC
One of the key goals of CARF is to provide tax authorities with greater visibility into crypto transactions.
As reporting begins, HMRC will receive information about:
- Certain crypto trades
- Exchange transactions
- Cross-border crypto activity
- Some transfers, including transfers from reporting platforms to external wallets
This increased transparency makes it easier for tax authorities to identify unreported gains.
Increased Scrutiny on Crypto Gains
Individuals and businesses that invest or trade in crypto may face greater scrutiny of their tax reporting.
Profits from crypto investments may be subject to Capital Gains Tax, while certain activities, such as trading, staking rewards, or mining, may fall under income tax rules, depending on the circumstances.
Businesses Accepting Crypto Payments
Businesses that accept cryptocurrency as payment for goods or services must maintain accurate records of these transactions for accounting and tax purposes.
While CARF reporting obligations usually apply to service providers rather than merchants, the increased transparency means HMRC may have greater visibility over crypto transactions used in business activities.
Additional Administrative Burden
For businesses operating in the crypto sector, compliance with the new rules may require:
- Improved transaction tracking
- Enhanced due diligence procedures
- Updated accounting and reporting systems
- More detailed customer information collection
How to Prepare for CARF
Although the UK rules are now in force, many businesses are still adapting to the new reporting requirements. Taking proactive steps now can help ensure your business is ready for ongoing compliance.
Review Your Current Crypto Activity
Start by assessing how your business currently interacts with cryptoassets.
This may include:
- Holding cryptocurrency as an investment
- Trading digital assets
- Accepting crypto payments
- Operating crypto-related services or platforms
Understanding your exposure is the first step toward preparing for compliance.
Strengthen Your Record Keeping
Accurate record keeping is essential when dealing with cryptoassets.
Businesses and investors should maintain clear records of:
- The purchase price of assets
- Acquisition dates
- The GBP value of transactions at the time they occurred
- Wallet addresses and exchanges used
- Details of gains, losses, and transfers
These records will help ensure accurate tax reporting and make it easier to respond to potential HMRC enquiries.
Review Your Tax Reporting
Crypto tax rules in the UK already require individuals and businesses to report relevant gains or income.
Reviewing your current tax reporting processes can help ensure they align with HMRC guidance and reduce the risk of errors.
Consider Crypto Tracking Tools
For businesses or individuals who frequently trade crypto, specialised crypto accounting or tax software can help track transactions more efficiently.
These tools can help monitor gains and losses, generate reports, and integrate with accounting systems.
Seek Professional Advice Early
Crypto tax rules and reporting requirements continue to evolve.
Speaking with an accountant can help ensure your business structure, record-keeping, and tax reporting processes remain compliant.
Potential Penalties for Non-Compliance
Failing to comply with CARF reporting obligations can result in financial penalties and other regulatory consequences.
Financial Penalties
HMRC can impose penalties for failures such as:
- Not registering as a reporting cryptoasset service provider
- Failing to obtain the required customer self-certifications
- Inaccurate or incomplete reporting
- Late reporting
- Poor record keeping
In some circumstances, penalties can reach up to £300 per reportable user.
HMRC Investigations
With increased reporting and transparency under CARF, HMRC may have a greater ability to identify discrepancies in crypto tax reporting.
This could result in additional enquiries or investigations into crypto-related activities.
Backdated Tax Liabilities
If crypto gains or income have not been properly reported, HMRC may seek to recover unpaid tax along with interest and penalties.
Reputational Risks for Businesses
For companies operating in the crypto sector, compliance failures can also create reputational risks, particularly when dealing with investors, partners, and regulators.
How We Can Help
As cryptocurrency regulation evolves, businesses and investors need to stay ahead of new compliance requirements.
At Chapman Robinson & Moore, we help clients:
- Understand their crypto tax obligations
- Maintain accurate records for crypto transactions
- Ensure tax returns correctly reflect crypto activity
- Prepare for regulatory changes such as CARF reporting requirements
Whether you are investing in crypto, accepting digital assets as payment, or operating a crypto-related service, professional guidance can help you remain compliant and avoid unnecessary risk.
Learn more about staying compliant with crypto investments in the UK, or get in touch today to find out how we can help your business succeed.
