Does Kucoin Report to the HMRC?

As far as we can find, no. KuCoin has no UK entity or branch, so it doesn't fall under the UK's reporting rules. Since January 1, 2026, those rules have required UK crypto platforms to send user and transaction data to HMRC. The first reports, covering 2026, are due by May 31, 2027.

That doesn't mean your KuCoin activity stays out of view. A platform based outside the UK can still report to its own country's tax authority, and if that country exchanges crypto data with the UK, the information can reach HMRC.

Either way, you report your own gains and income. KuCoin's records won't do the calculation for you. HMRC says exchange records don't track the pooled cost of your tokens, so keep your own record of every disposal.

CARF is an OECD standard that the UK put into law starting January 1, 2026. UK crypto providers now collect:

• your name, date of birth, and address

• your National Insurance number or Unique Taxpayer Reference

• your account and transaction data

They report that information to HMRC every year. The first reports cover January 1 to December 31, 2026 and are due by May 31, 2027.

You must provide these details to the crypto providers that request them. A UK provider can fine you up to £300 if you refuse. See HMRC's guidance on information you'll need to give to cryptoasset service providers.

KuCoin transactions are subject to UK tax law, and each type of transaction is treated differently:

• Selling, swapping, spending, or gifting crypto: These are disposals for Capital Gains Tax. Gifts to a spouse, civil partner, or charity are not.

• Crypto-to-crypto trades: Swapping BTC for ETH is a disposal of the BTC, even though you never received pounds.

• Staking and other rewards: These are generally miscellaneous income at their sterling value when you receive them, or trading income if your activity amounts to a trade. Selling the tokens later can create a separate capital gain or loss.

• Moving crypto between your own wallets: This is not a disposal, because you keep beneficial ownership. A fee paid in crypto counts as a disposal of the crypto used.

For 2025/26 and 2026/27, the annual exempt amount for capital gains is £3,000. Gains above it are taxed at 18% within the basic rate band and 24% above it. See HMRC's Capital Gains Tax rates and allowances.

KuCoin doesn't issue UK tax documents, and HMRC doesn't require it to. Users calculate their own gains and income from their transaction history.

KuCoin lets you download transaction records as CSV files, covering trades, deposits, and withdrawals. Use those records as the starting point for your calculations, and add records from any other exchanges and wallets you used.

Export your KuCoin trade, deposit, and withdrawal history, and combine it with records from every other exchange and wallet. Then:

• Match transfers between wallets you own so they aren't treated as disposals.

• Identify sales, swaps, spending, and other disposals.

• Separate staking rewards and other income.

• Convert each transaction to pounds sterling at the time it happened.

• Apply HMRC's matching rules to find your allowable costs:

  1. Same-day rule: tokens of the same type bought and sold on the same day are matched first.

  2. 30-day rule: tokens bought within the 30 days after a sale are matched next.

  3. Section 104 pool: everything else goes into the pool, and disposals use its average cost.

• Calculate your gains, losses, and income for the tax year.

TokenTax can import your KuCoin CSV files and produce these calculations for your Self Assessment.

HMRC doesn't receive an automatic filing from KuCoin today. Its view of crypto activity comes from several sources:

• CARF reports from UK crypto providers, with the first reports due by May 31, 2027, covering 2026

• information from other countries that exchange CARF data with the UK

• information from UK banks and financial institutions

• blockchain analysis

If you missed crypto gains in earlier years, HMRC's Cryptoasset Disclosure Service lets you correct them voluntarily. The penalty for unpaid tax from an inaccurate return can reach 100% of the tax owed plus interest, and more for offshore matters.

Learn more about crypto taxes in the United Kingdom.

UK rules differ from US crypto tax rules. These strategies apply:

• Offsetting gains with losses: A capital loss reduces your capital gains in the same tax year, and you must report it to HMRC to use it. Capital losses don't reduce Income Tax. Under the same-day and 30-day rules, buying the same token back within 30 days of a sale matches the sale to that new purchase. A quick rebuy therefore doesn't lock in a loss.

• Using annual exemptions: The annual exempt amount is £3,000 for 2025/26 and 2026/27. It applies to your total gains from all assets, not just KuCoin. Spreading sales across two tax years lets you use it twice, and transfers to a spouse or civil partner are not disposals.

• Holding assets long-term: The UK has no lower rate for crypto held longer. Holding only delays the tax until you sell, which lets you choose the tax year, and so the allowance and rate band, that apply.

TokenTax can show you the effect of these choices on your calculations.

TokenTax imports your KuCoin history from CSV files. See our guide to importing your KuCoin data.

With your KuCoin data alongside your other exchanges and wallets, TokenTax can:

• match transfers between your own accounts

• apply the UK same-day, 30-day, and Section 104 pooling rules

• calculate your gains, losses, and income for Self Assessment

Accurate results depend on importing your complete transaction history.

For the 2025/26 tax year, the online Self Assessment return and any tax due are both due by January 31, 2027. The return has a dedicated cryptoasset section.

You report crypto gains in any of these cases:

• your total disposals of all assets exceeded £50,000

• your total gains exceeded £3,000

• you want to claim a loss