CryptoTax UK · Guide
How to report your Coinbase activity to HMRC
If you've used Coinbase to buy, sell or swap crypto as a UK resident, HMRC will typically expect you to declare any disposals on your Self Assessment. This guide walks you through exporting your Coinbase history, calculating your gains, and reporting on the SA108 Capital Gains pages. Educational only — always confirm with HMRC or a qualified accountant.
Open the Coinbase-ready calculator →Why HMRC may already know about your Coinbase account
Since 2020, HMRC has been requesting account data from major UK-active exchanges including Coinbase under its information powers. If you've held crypto on Coinbase and haven't yet declared disposals, you may want to bring your reporting up to date — the rules apply whether or not you receive a 'nudge letter'. Penalties may apply for unreported gains, so check your position promptly.
Step 1: Export your Coinbase transaction history
Sign in to Coinbase, go to your profile, choose 'Statements' or 'Taxes & Reports', then download the 'Transaction history (CSV)' for the period you need — typically 6 April to 5 April for a UK tax year. You may also need the 'Gain/Loss' report. Save both files; keep them for at least six years in case HMRC asks.
Step 2: Identify your disposals
A disposal includes selling crypto for GBP, swapping one crypto for another, using crypto to buy something, and gifting it to anyone other than your spouse. Buys and on-chain transfers between your own wallets are not disposals. Coinbase Earn / staking rewards are typically income (declared separately), not capital disposals — see our staking guide.
Step 3: Apply HMRC's matching rules
Each disposal is matched against acquisitions in this order: same-day rule, then the 30-day 'bed-and-breakfast' rule, then your Section 104 pool (the weighted-average cost basis of remaining holdings). Coinbase's own gain/loss report doesn't always apply these UK-specific rules, so you typically need to recalculate. The CryptoTax UK calculator imports your Coinbase CSV and applies all three rules automatically.
Step 4: Apply the annual allowance and report on SA108
For 2025/26, the Capital Gains Tax annual exempt amount is £3,000. Subtract it from your total net gains. The rest is taxed at 10% (basic rate) or 20% (higher rate) on crypto disposals — with rate changes for disposals on or after 30 October 2024 (see our HMRC guide). Report disposals on SA108 boxes 13.1–13.5 (the new Cryptoassets section, introduced from 2024/25).
Common Coinbase reporting mistakes
The biggest mistakes UK users make are: (1) using Coinbase's USD-converted figures instead of GBP at transaction date, (2) ignoring crypto-to-crypto swaps as disposals, (3) treating staking rewards as capital instead of income, and (4) missing internal transfers that look like disposals but aren't. A pooled-basis calculation in GBP avoids all four.
Frequently asked questions
Does Coinbase send a tax form to HMRC?
Coinbase does not currently issue a UK tax form like a P60. HMRC may obtain account data on request and the OECD Crypto-Asset Reporting Framework (CARF) takes effect from 2026 — which is expected to automate exchange-of-information for crypto. You typically remain responsible for declaring your own gains via Self Assessment.
What if my Coinbase trades go back several years?
You may need to file amendments or use HMRC's voluntary disclosure facility. The deadline to amend a Self Assessment is typically 12 months after the original deadline; older years usually require a separate disclosure letter. Consider speaking to a qualified accountant if you have multiple unreported years.
Does the calculator import Coinbase CSV files?
Yes — Premium plans include CSV import for Coinbase, Binance, Kraken and a generic format. Upload your file, the calculator detects the schema and processes it through the HMRC matching engine. Monthly Premium is £2, yearly is £19.99, lifetime is £39.99.
What about Coinbase Pro / Advanced Trade?
Coinbase Pro merged into Coinbase Advanced Trade. The CSV format differs slightly but the calculator handles both. Make sure to export the full date range so the Section 104 pool stays accurate.
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Open the Coinbase-ready calculator →Educational guidance only. CryptoTax UK is not a regulated tax adviser and the information above does not constitute tax, legal or financial advice. Always confirm your specific position with HMRC or a qualified accountant before filing.