You open an email from your exchange asking you to confirm your tax residence and National Insurance number. You have heard that HMRC may receive crypto data from 2026 or 2027. It is unclear whether the platform’s report means your tax position is already covered.
Crypto exchange reporting is expanding under the UK’s Crypto-Asset Reporting Framework (CARF). Relevant providers collect reportable data from 1 January 2026. The first information exchanges are expected in 2027. This does not replace your tax return. UK taxpayers must still calculate and declare taxable crypto gains, losses and income through Self Assessment where required.
Exchange reports do not file your UK return
An exchange report is a reporting record, not a completed UK tax calculation.
A relevant Cryptoasset Service Provider is often called a CASP or RCASP. It must carry out due diligence. Due diligence means checking who the customer is, their tax residence, and whether their activity is reportable.
The provider may need your name, address, date of birth, and Tax Identification Number (TIN). It may also need details of your tax residence and transactions. A National Insurance number is not always the same as the tax identifier requested. Complete the platform's tax-residence form with care.
A UK taxpayer remains responsible for deciding whether they need Self Assessment. They must calculate gains and losses under UK rules. They must identify taxable income and keep evidence for the figures.
A report received by HMRC can help it spot a mismatch. It cannot automatically apply UK share-pooling rules, allowable costs, losses, or income treatment across every platform you used.
CARF collection starts on 1 January 2026
Relevant providers must collect and check reportable customer information from 1 January 2026.
The practical 2026 to 2027 timeline
From January 2026, platforms may refresh identity details. They may ask customers to self-certify their tax residence. A self-certification states where you are tax resident. It does not state where you are travelling.
A platform can ask for tax details after it has completed Know Your Customer checks. KYC and anti-money laundering checks verify identity. They also help manage financial-crime risk. CARF focuses on tax residence and reportable cryptoasset transactions.
The timetable has several separate steps. From 1 January 2026, new customers may need a tax-residence self-certification. This may happen before they use reportable services. Providers must also review relevant existing customers during 2026.
They must resolve inconsistent information. One example is an address in one country and tax residence declared in another. The first report normally covers 2026 calendar-year activity. It is due to HMRC during 2027. The first automatic CARF exchanges are expected later in 2027.
A 2026 request is a due-diligence step. It does not show that anyone has calculated your tax.
Who reports and what data reaches HMRC
Providers assess and file CARF information where the rules apply. Customers must give accurate information and remain responsible for their UK tax returns.
| Party | Trigger to assess | Action from 2026 | Does it file your tax return? |
|---|
| UK reporting provider | UK reporting status and reportable users | Due diligence and annual CARF report | No |
| Overseas provider | UK nexus, user residence and local rules | Assess the reporting route that applies | No |
| UK tax-resident customer | Own activity, gains, income and filing position | Give accurate details and keep records | The customer files if required |
Data collected from customers
CARF due diligence can include your legal name and residential address. It can include your date of birth, tax residence, and TIN. The provider may record account or wallet identifiers connected with the services it provides.
Data reported and then exchanged
HMRC receives information under the UK reporting rules. It may later share relevant information with another tax authority where an international CARF relationship applies.
How CARF information moves
1. Customer gives data
Identity, address, tax residence, TIN
→
2. Provider checks it
Due diligence and reportable activity review
→
3. HMRC receives report
Annual CARF data for users where it applies
→
4. Authorities exchange
Only where an agreement applies
It helps to separate three layers of information. CASP due diligence starts by identifying the customer. This includes legal name, address, date of birth, tax residence self-certification, and a TIN.
The provider may seek evidence when information seems unreliable. The CARF reporting file can link customers to reportable cryptoasset transactions. These may include exchanges between cryptoassets and fiat currency. They may also include crypto-to-crypto swaps, transfers, and certain payments.
The file can include asset details, value, transaction counts, or fees. The rules decide which details it needs.
HMRC crypto data does not automatically go to every country. HMRC may share the relevant part with another tax authority where an applicable CARF exchange relationship is in force.
Self Assessment remains your tax duty
Self Assessment requires UK taxpayers to calculate and report their full taxable position where they must file.
Selling Bitcoin for pounds is usually a disposal. Swapping Bitcoin for Ether can also be a disposal. The same can apply to exchanging Ether for a stablecoin. Spending crypto on goods can also be a disposal. No cash needs to reach your bank account.
One report cannot see every cost
UK Capital Gains Tax calculations need acquisition cost, disposal proceeds, and allowable costs. They also need the UK matching rules. These include share-pooling for tokens of the same type.
Income needs its own record
Staking rewards, mining receipts, and some airdrops can create Income Tax issues. Certain lending returns can do the same. The facts decide the treatment. Their value when received may matter. A later sale can create a separate capital gains calculation.
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A UK-focused Bitcoin tax book can help beside your transaction records. It is useful if you need to separate disposals from simple wallet transfers. It should support your record review. It cannot replace current HMRC guidance or tailored advice.
- Explains the difference between a crypto sale, token swap, and transfer between wallets you own
- Helps create a transaction checklist before preparing a Self Assessment return
- Gives a desk reference when checking exchange exports against personal records
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Wallet transfers can break the tax trail
Moving crypto between wallets with the same beneficial owner is usually not a taxable disposal. But the ownership and cost trail must be clear.
A transaction hash is a unique blockchain reference. Think of it like a parcel tracking number. Keep it with the sending and receiving addresses. Keep the date, time, asset amount, and sterling value where relevant. Keep platform statements from both sides.
Evidence that a move was your transfer
A transfer record should show that the same beneficial owner controlled both sides. Screenshots can help, but CSV exports are stronger evidence. Wallet addresses and transaction hashes also create a stronger evidence trail.
Network fees need attention too. They may be small in token terms. Paying a fee can have its own tax effects because crypto is used to pay it.
Records for unusual crypto activity
Keep records for stablecoin swaps, DeFi transactions, NFT purchases, and NFT sales. Keep records for airdrops, staking receipts, and platform fees. Do not assume an app label of “transfer” settles UK tax treatment.
CARF-focused guidance matters less if you never used a cryptoasset service provider. It also matters less if you do not have UK tax residence or a reportable UK connection. It may not help if you only need help with a filed return. It does not replace advice on residence status, DeFi treatment, trading treatment, penalties, or an HMRC enquiry.
Before relying on an exchange report, compare it with your own records. A UK crypto tax specialist can help test the figures. This may help before you submit Self Assessment, particularly where several platforms, wallets, or token swaps are involved.
Questions & answers
Do crypto exchanges report to HMRC?
Some crypto exchanges and providers may report information to HMRC under UK CARF rules where they have reportable users. The answer depends on the legal entity, services, reporting connection, and customer tax residence. It does not depend only on the exchange brand name.
What are the new HMRC crypto rules in 2026?
Relevant providers begin CARF due diligence and data collection on 1 January 2026. They report applicable 2026 calendar-year information during 2027. UK users still calculate their own taxable gains and income.
Does Binance report my crypto transactions to HMRC?
Binance reporting has no universal yes or no answer. The entity serving you and the rules that apply may differ. Keep full records even if the platform is outside the United Kingdom, or if it has not asked for new tax details.
Is there a minimum amount before crypto is reported?
CARF has no simple universal minimum balance or profit threshold for every user. A provider's reportability test is separate from your UK tax position. Your Self Assessment position depends on your transactions and circumstances.
Keep records before HMRC needs answers
Build records as each transaction happens. Do not rebuild them years later.
A workable record-keeping checklist
- Save CSV or PDF histories before a platform changes its export format or closes your account.
- Record the date, time, asset, quantity, sterling value, fees, and transaction type for each purchase, sale, swap, or reward.
- Match each wallet withdrawal to its later deposit with addresses and transaction hashes.
- Keep tax-residence declarations and messages requesting a TIN or CARF self-certification.
- Check that you captured losses, income, and disposals before preparing Self Assessment.
If HMRC data differs from yours
Do not change a return merely to match one exchange figure. Check the underlying transactions first. Then correct any real omission with proper evidence.
The essentials:
- CARF data collection starts on 1 January 2026. The first 2026 reporting cycle occurs in 2027.
- An exchange report can reach HMRC. It does not calculate or submit your UK tax position.
- Sales, swaps, stablecoin exchanges, and crypto spending can create tax events without a pound withdrawal.
- Wallet transfers are usually not disposals. They need evidence to preserve acquisition cost and ownership history.
- Accurate records across exchanges and wallets offer strong protection if HMRC asks questions.
For an exchange, compliance involves more than sending an annual file. Its HMRC reporting duties include deciding whether it is a reporting cryptoasset service provider. It must obtain and check customer information. It must keep evidence used for classification.
It must also monitor changes in circumstances. It must correct inaccurate or incomplete reports where required. A provider may face enquiries, notices, and penalties following a late filing, incorrect information, or an ignored valid self-certification request. The facts and reasonable-excuse rules matter.
These duties do not remove the customer's UK crypto tax responsibility. Users should keep their own crypto tax records. They must still apply UK share-pooling rules for Self Assessment.
