CAPITAL GAINS TAX ON CRYPTO ASSETS: BITCOIN, ETHEREUM & DIGITAL CURRENCY
Cryptocurrency has moved from the fringes to the mainstream. Whether you’ve invested in Bitcoin, Ethereum, Solana, Cardano, or any other digital asset, HMRC has made one thing clear: crypto is not currency. For tax purposes, it’s treated as a digital asset or property, and disposals trigger potential Capital Gains Tax liabilities.
At Accountancy and Tax Crew, we help crypto investors navigate this rapidly evolving area of tax law, ensuring compliance while identifying planning opportunities to minimise your tax bill.
Does Crypto Trigger Capital Gains Tax?
Yes. Every time you dispose of a crypto asset, you may realise a capital gain or loss. A “disposal” includes:
- Selling crypto for fiat currency (GBP, USD, EUR)
- Exchanging one crypto for another crypto (e.g., Bitcoin to Ethereum)
- Using crypto to pay for goods or services
- Gifting crypto to someone other than your spouse or civil partner
- Transferring crypto to a wallet you do not control (e.g., moving to an exchange for sale)
Mining, staking rewards, and airdrops may be treated as income (subject to Income Tax Self-Assessment Tax Returns) at the point of receipt, with subsequent disposals falling under CGT. We can help you distinguish between the two.
HMRC’s View on Crypto Assets
HMRC does not consider crypto to be currency or money. Instead, it is treated as a “crypto asset“ falling under existing capital gains rules. This means:
- The annual CGT exemption applies
- Losses can be claimed and carried forward
- Same-day and bed & breakfasting rules apply (30-day rule)
- Pooling rules (Section 104 holdings) apply to identical crypto assets
Importantly, crypto exchanges are now required to share data with HMRC. HMRC has access to transaction records from major platforms including Coinbase, Binance, Kraken, and others. If you’ve been trading without reporting, assume HMRC already knows.
How Crypto Gains Are Calculated
Unlike shares, where you can identify specific shares sold, crypto is pooled using Section 104 holdings. This means:
- All identical crypto assets (e.g., all Bitcoin) are pooled together
- The cost basis is the average purchase price across all acquisitions
- When you sell, you use this average cost, not the specific cost of that particular coin
We handle these calculations for you, even across hundreds of transactions and multiple exchanges.
Penalties for non-reporting
HMRC is actively targeting crypto investors. Consequences of failing to report include:
- Late filing penalties (£100 initially, increasing over time)
- Interest on unpaid tax
- Penalties of up to 100% of the tax due for deliberate non-disclosure
- HMRC enquiries which can be intrusive and time-consuming
HMRC has successfully obtained court orders forcing exchanges to disclose customer data. If you have traded crypto and not reported gains, proactive disclosure is far cheaper than waiting for HMRC to find you.
How We Help Crypto Investors
- Transaction analysis: We aggregate your data from exchanges, wallets, and DeFi protocols
- Gain calculations: Accurate computation using HMRC’s pooling rules
- Loss claims: Ensuring you claim capital losses to offset gains
- Income vs. capital distinction: Correctly classifying mining, staking, and airdrop rewards
- Tax return preparation: Filing your Self-Assessment tax return with complete crypto disclosure
- Disclosure to HMRC: If you have unreported gains from previous years, we can make a voluntary disclosure to minimise penalties
Planning Opportunities
Crypto gains can be managed tax-efficiently:
- Utilise your annual exemption each tax year
- Realise losses to offset gains (even if you believe in the asset long-term, a “bed and breakfast” sale can crystalise a loss)
- Transfer assets to a spouse before sale to use both exemptions
- Consider timing of disposals across tax years
We provide proactive planning advice before you transact, not just after.
Traded or invested in cryptocurrency? Whether you’ve made a single trade or hundreds of DeFi transactions, let us ensure your crypto gains are reported correctly and tax-efficiently.