Coinbase Tax Report UK: Export & File With HMRC in Minutes (2026/27)

Coinbase is the most widely used exchange in the UK, but its built-in tax reporting does not give you an HMRC-compliant Capital Gains Tax calculation. You need to export your transaction history and apply UK-specific rules like Section 104 pooling, same-day matching, and the 30-day bed-and-breakfasting rule. This guide is the full Coinbase UK tax report walk-through for the 2026/27 tax year (6 April 2026 to 5 April 2027) and the still-fileable 2025/26 year (deadline 31 January 2027).

Does Coinbase report to HMRC?

Yes — and this matters more than it used to. Coinbase UK is FCA-registered as a cryptoasset business and is in scope for the Crypto-Asset Reporting Framework (CARF), which became active for UK reporting from January 2026. Under CARF, Coinbase shares transaction-level data with HMRC: your account identity, total disposals, gross volume, and reportable crypto transfers. If your Self Assessment does not match what Coinbase reported, expect a nudge letter. The clean fix is to file accurately the first time — every disposal, every staking reward, every Earn credit.

What Coinbase gives you (and what it does NOT)

Coinbase's tax tab lets you download a "Gain/Loss Report" but it uses FIFO or average cost accounting — neither of which match HMRC rules. For UK Self Assessment, you need the raw transaction history as a CSV file and then apply UK share-pooling rules yourself or use a tool like CryptoLens that handles the pooling automatically. The Coinbase report is not HMRC-compliant on its own; the platform is upfront about this in its own tax help docs.

Exporting your Coinbase transaction history (step by step)

Sign in to Coinbase on a desktop browser — the mobile app does not give you the full export. Go to Profile then Statements, or visit coinbase.com/statements directly. Select the relevant tax year period: for 2026/27 that is 6 April 2026 to 5 April 2027, and for 2025/26 it is 6 April 2025 to 5 April 2026. Choose "Transaction history" as the report type and CSV as the format. Click Generate Report. Coinbase emails you a link or shows the CSV ready to download within a few minutes. If you used Coinbase Pro before its merger, you also need the legacy Coinbase Pro export from the same statements page.

What each column in the Coinbase CSV means

The CSV includes Timestamp, Transaction Type, Asset, Quantity Transacted, Spot Price Currency, Spot Price at Transaction, Subtotal, Total (Inclusive of fees), Fees, and Notes. For UK tax purposes the key fields are the timestamp (to apply same-day and 30-day rules correctly), the asset, the quantity, the GBP subtotal, and the transaction type. If your base currency is not GBP — many UK Coinbase accounts default to USD — you must convert every line to GBP at the historical spot rate on the transaction date. HMRC accepts any consistent methodology; end-of-day reference rates are the norm.

Handling Coinbase Earn, staking, and learning rewards

These are crucial for HMRC and the most under-reported items on Coinbase tax returns. Staking rewards (ETH staking, ADA staking, SOL staking) and Coinbase Earn rewards (received after completing educational tasks) are taxed as miscellaneous income at their GBP value on the day they are received. They then take that GBP value as their cost basis for future CGT purposes when you later dispose of them. Many users forget this dual-tax treatment and either overpay CGT (because they forget the income-tax cost basis step-up) or miss the income tax entirely (because they only file disposals). For the deep-dive see our staking tax guide and airdrop tax guide.

Sends, receives and wallet transfers

Moving crypto from your Coinbase account to a self-custody wallet (Ledger, MetaMask, Phantom) is NOT a disposal. It is a transfer of the same asset between your own custody — no gain, no loss. But you must keep the record so the cost basis carries through. Sending crypto to someone else is a different story: a gift to anyone other than your spouse or civil partner is a disposal at the GBP market value at the moment of send. See the crypto gifting tax guide for the spousal exemption mechanics.

Crypto-to-crypto trades on Coinbase

Every token-to-token trade on Coinbase — ETH to SOL, BTC to USDC, USDC to a memecoin — is a UK disposal of the first asset and an acquisition of the second. There is no "wait until I cash out" rule. Coinbase reports the matched legs in your transaction history; HMRC expects you to value the disposal at the GBP price at the timestamp. We have written about this trap repeatedly in the crypto-to-crypto swap tax guide.

Applying UK Section 104 pooling

Once you have the Coinbase CSV, you apply three matching rules in order: same-day rule (sales matched against same-day buys of the same token), 30-day "bed and breakfasting" rule (sales matched against acquisitions in the following 30 days — see the 30-day rule explainer), and finally Section 104 pooling for anything left over. Each token has its own pool. Each pool tracks a running average cost. This is where manual spreadsheets fall apart for anyone with more than a hundred or so transactions.

Importing to CryptoLens

CryptoLens accepts Coinbase's standard CSV directly. Upload the file, confirm the asset mapping, and the platform applies Section 104 pooling, same-day rule, and the 30-day bed-and-breakfasting rule automatically. The output is a complete SA108-ready tax summary with a full audit trail — every pool transaction, every gain calculation, every rule applied, every staking reward classified as income. The same import flow works for Binance, Kraken, and MetaMask — combine all your sources into one return.

Records HMRC expects you to keep

Under UK law you must retain crypto records for at least five years after the 31 January filing deadline. That means your 2025/26 records must be kept until at least January 2032, and your 2026/27 records until January 2033. Keep the original Coinbase CSV, any wallet exports, and the calculated tax summary. Under CARF, HMRC already has the matching data — your records are what defend your figures if an enquiry opens.