What should I do if I receive an HMRC cryptocurrency nudge letter?

Full answer

HMRC has been sending 'nudge letters' (also called 'One to Many' letters) to people whose crypto holdings or transactions it has identified via data obtained from exchanges and crypto platforms. Under the OECD's Crypto-Asset Reporting Framework (CARF) and the DAC8 directive for EU exchanges, HMRC receives data from Coinbase, Kraken, Binance (UK users), and others. Receiving a letter does NOT mean you owe tax or that you have done anything wrong. HMRC is asking you to review your position. What to do: 1. Do not panic. The letter is informational, not an investigation notice. You are not under criminal investigation simply because you received it. 2. Gather your transaction history. Use your exchange's export function (CSV download), and if you used multiple wallets or DeFi protocols, use a crypto tax tool (e.g. Koinly, CoinTracker, TaxBit) to aggregate records. You need buy/sell dates and prices, wallet transfers, swap records, airdrop receipts, staking rewards, mining income, and NFT transactions. 3. Apply HMRC's crypto tax rules: - Buying and holding: no tax on purchase. - Selling or swapping: CGT disposal event. Calculate gain = proceeds minus allowable cost (acquisition cost plus fees). Apply pooling rules (Section 104 pool) and same-day and 30-day rules (bed-and-breakfast rules). - Airdrops: if received for doing nothing, likely CGT on disposal. If received for services, income tax on receipt. - Staking/lending rewards: HMRC treats these as income (miscellaneous income or trading income depending on the scale and regularity), taxable at the pound-sterling value on the date received. The cost basis for future disposal is the value at receipt. - Mining: treated as trading income if done commercially; miscellaneous income if not. 4. Check if you owe tax. Apply the Annual Exempt Amount (GBP 3,000 for 2026/27). Offset any capital losses. 5. If you have unpaid tax (from any year back to 2014/15 potentially), make a voluntary disclosure using HMRC's Cryptoassets Disclosure Facility or the Digital Disclosure Service (DDS). Voluntary disclosure reduces penalties significantly -- usually 0-30% of unpaid tax versus 30-100%+ if HMRC discovers the liability first. 6. If you owe nothing, you do not need to respond to the letter. Keep your records for at least 5 years after the relevant Self Assessment deadline. 7. Consider a crypto-specialist tax accountant if your situation is complex (DeFi, multiple chains, large volumes).

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