UK tax dates

UK Crypto Tax Deadline 2027

If you sold, swapped, or earned crypto between 6 April 2025 and 5 April 2026, the online Self Assessment deadline is 31 January 2027 - and that is also the day any tax owed must be paid. Here is every date that matters, what HMRC expects you to have on file, and how to pull your wallet records together before the January rush.

Last updated 4 July 2026

Key HMRC Dates for Crypto Holders

5 April 2026

End of the 2025/26 tax year

Every disposal between 6 April 2025 and this date belongs on the return due January 2027.

5 October 2026

Register for Self Assessment

Deadline to register with HMRC if you have crypto gains to report and have never filed before.

31 October 2026

Paper return deadline

Only relevant if you file on paper. Almost everyone files online instead.

31 January 2027

Online return + payment deadline

The big one. File your online Self Assessment and pay any tax owed for 2025/26.

Why the 2027 Deadline Is Different: CARF

From 1 January 2026 the UK operates the Crypto-Asset Reporting Framework (CARF). Exchanges and other crypto service providers must collect customer details and report transaction data to HMRC, with the first reports flowing in during 2027. In practice this means HMRC will hold third-party data about your exchange activity when it reviews returns filed for this deadline.

Exchange reports do not cover what happens in self-custody wallets - but your on-chain history is public and permanent, and it connects to exchanges every time you deposit or withdraw. The safe position is simple: report accurately, and keep a complete wallet-level record that supports the numbers on your return.

The Records HMRC Expects You to Keep

Every disposal - Sales, token-to-token swaps, spending, and gifts (except to a spouse) - each with date, quantity, and GBP value

Every acquisition - Buys, rewards, and airdrops, with the cost basis in pounds at the time

Income events - Staking rewards and mining income are taxed as income at receipt, then CGT applies on later disposal

Wallet-to-wallet transfers - Not taxable, but you need them on record to prove a movement was not a disposal

Transaction references - The on-chain hash or signature for each entry, so any figure can be verified

How to Get Your Wallet Records Ready

1
Export each wallet's full history
Paste each wallet address into the export tool - Solana, Ethereum, and Base are supported - and download the complete CSV. Do this once per wallet and per chain you have used.
2
Import into a crypto tax calculator
Koinly, CoinLedger, and CoinTracker all accept the CSV directly, match transfers between your own wallets, and apply HMRC's share-pooling rules to calculate gains in pounds.
3
File before the January rush
The HMRC portal and every tax tool slow to a crawl in late January. Filing in autumn also means you know your bill months before the payment deadline.

Frequently Asked Questions

When is the UK crypto tax deadline?

For the 2025/26 tax year (6 April 2025 to 5 April 2026), the online Self Assessment deadline is 31 January 2027. That is also the deadline to pay any Capital Gains Tax or Income Tax owed on your crypto. Paper returns are due earlier, by 31 October 2026.

Do I need to report crypto to HMRC?

You need to report if your total gains for the tax year exceed the Capital Gains Tax annual exempt amount (£3,000), or if your total disposal proceeds exceed £50,000, or if you received crypto as income (staking rewards, airdrops connected to a service, or payment for work). Since 2024/25, the Self Assessment form has dedicated boxes for crypto assets.

Does HMRC know about my crypto?

Increasingly, yes. The UK implemented the Crypto-Asset Reporting Framework (CARF) from 1 January 2026, which requires exchanges and other crypto service providers to collect and report customer transaction data to HMRC. HMRC has also been sending nudge letters to suspected crypto holders for years. Self-custody wallet activity is on public blockchains and can be linked to you through exchange withdrawals.

What counts as a taxable crypto disposal in the UK?

Selling crypto for pounds, swapping one token for another (including on a DEX), spending crypto, and gifting crypto to anyone other than your spouse or civil partner are all disposals for Capital Gains Tax. Moving crypto between your own wallets is not a disposal, but you still need records to prove it.

What records does HMRC require for crypto?

HMRC expects records of every transaction: the type of token, date, quantity, value in pounds at the time, and what the transaction was (buy, sell, swap, transfer). Exchanges only cover their own platform - for on-chain activity in wallets like Phantom or MetaMask you need a wallet-level export, which is exactly what this site produces.

What happens if I miss the 31 January deadline?

HMRC charges an automatic £100 penalty the moment the deadline passes, even if you owe no tax. After three months, daily £10 penalties (up to £900) start, with further percentage-based penalties at six and twelve months, plus interest on unpaid tax.

This page is general information, not tax advice. Thresholds and dates are for the 2025/26 UK tax year; check gov.uk or speak to an accountant about your own position.

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Get Your Wallet Records Before the Deadline

Paste your wallet address to preview your transactions free, then download the full Koinly-ready CSV from $4.99. Solana, Ethereum, and Base.

Export Your Transactions

Works with Phantom, MetaMask, Coinbase Wallet, Ledger, and any public wallet address.