Cryptoassets remain a topic that divides opinion. Some see them as an exciting investment opportunity, while others view them as highly speculative.
Whatever your perspective, one thing is becoming increasingly clear – HMRC is paying much closer attention to crypto transactions and taxpayers need to understand the rules.
Recent research suggests that crypto ownership in the UK continues to grow, with more people holding larger investments than ever before.
As a result, more individuals are finding themselves with tax reporting obligations, often without realising it.
HMRC has recently highlighted several common mistakes that taxpayers make when dealing with cryptoassets.
Understanding these pitfalls can help avoid unexpected tax bills, penalties and unnecessary stress.
- Crypto is not treated like money
One of the most common misunderstandings is the belief that cryptoassets are simply another form of currency.
From a UK tax perspective, HMRC does not generally view cryptoassets as money or foreign currency.
Instead, they are treated as assets. This means that many of the tax exemptions available for traditional currencies do not apply to cryptocurrency holdings.
The practical impact is significant. If the value of your bitcoin, Ethereum or other tokens increases and you dispose of them, there may be a taxable capital gain to report.
There is one important development to watch. The Government has announced plans to introduce special tax treatment for certain stablecoins from April 2027, but until the legislation is enacted, the existing rules continue to apply.
- Swapping one cryptocurrency for another can trigger tax
Many investors assume that tax only becomes relevant when crypto is converted back into pounds sterling.
Unfortunately, this is not the case.
Exchanging one cryptocurrency for another is usually treated as a disposal for Capital Gains Tax (CGT) purposes. For example:
- Bitcoin exchanged for Ethereum
- Ethereum exchanged for Solana
- Bitcoin used to purchase an NFT
Each of these transactions may create a taxable gain or loss, even though no cash has changed hands.
This is one of the biggest surprises for crypto investors and often results in reporting obligations being overlooked.
- Keeping funds on an exchange does not avoid tax
A related misconception is that gains are not taxable until money is withdrawn from a trading platform.
The reality is that tax consequences can arise while assets remain entirely within an exchange account.
It is the transaction itself that creates the tax event, not the transfer of funds back to your bank account.
By contrast, moving your own cryptoassets between wallets that you own will generally not trigger a disposal, provided beneficial ownership remains unchanged.
- The share pooling rules still apply
Calculating crypto gains is not always as simple as comparing the purchase and sale price of a specific coin.
For many commonly traded cryptocurrencies, HMRC applies the same share pooling rules used for shares and securities.
Broadly speaking, purchases and disposals are matched using a specific order:
- Acquisitions made on the same day.
- Acquisitions made within the following 30 days.
- The main pooled holding.
This can become complex where transactions take place across multiple exchanges or wallets. Investors often assume each platform is treated separately, but HMRC generally expects all holdings of the same cryptocurrency to be considered together.
For active traders, accurate record keeping is essential if gains are to be calculated correctly.
- Some crypto receipts are subject to income tax
While many crypto transactions fall within the Capital Gains Tax regime, that is not always the case.
Income Tax may apply where cryptoassets are received through:
- Mining activities
- Staking rewards
- Certain airdrops
- Employment income paid in cryptoassets
The distinction between Income Tax and Capital Gains Tax can have a significant effect on the amount of tax due.
In some situations, both taxes may become relevant at different stages of the transaction lifecycle.
This is an area where professional advice can be particularly valuable.
- Cryptoassets can be relevant for Inheritance Tax
Cryptoassets are also part of an individual’s estate for Inheritance Tax (IHT) purposes.
This means that holdings may need to be valued and disclosed when administering an estate.
HMRC has expressed concerns that some taxpayers and advisers may be overlooking crypto holdings entirely, particularly where family members are unaware of digital wallets or exchange accounts.
Estate planning should therefore include consideration of any crypto investments alongside more traditional assets.
- Good record keeping is essential
Tax calculations are only as reliable as the records used to prepare them.
HMRC expects taxpayers to retain details including:
- The type of cryptoasset involved
- Transaction dates
- Amounts bought or sold
- Value in pounds sterling at the transaction date
- Wallet details and exchange records
- Running records of holdings
This can be challenging for active investors using multiple exchanges, decentralised finance platforms or digital wallets.
Another risk is that some exchanges only retain records for limited periods, while others may cease trading altogether. Relying solely on exchange statements may not be sufficient.
Maintaining your own comprehensive records can save considerable time and expense later.
- HMRC is increasingly well informed
Perhaps the most important message is that HMRC’s visibility of crypto transactions is growing rapidly.
New reporting requirements mean that cryptoasset service providers are collecting increasing amounts of customer information.
From 2027, HMRC will receive significantly more data through international reporting systems, making it easier to identify undeclared gains and income.
In addition, self assessment tax returns now include dedicated sections for reporting cryptoasset gains and losses, further increasing HMRC’s ability to review and analyse returns.
The days when investors could assume that crypto transactions would go unnoticed are quickly disappearing.
Final thoughts
Cryptoassets may be digital, but the tax consequences are very real.
Many of the mistakes identified by HMRC arise from understandable assumptions.
Investors often believe that crypto is treated like traditional currency, that tax only applies when funds are withdrawn or that small transactions between different tokens do not matter. Unfortunately, those assumptions can lead to costly errors.
As crypto ownership becomes more widespread and HMRC’s access to transaction data continues to expand, taxpayers should ensure they understand their obligations and keep detailed records.
If you hold cryptoassets and are unsure whether you have reporting obligations, or would like assistance reviewing past transactions, our team would be happy to help, so please get in touch.
Taking advice early can often prevent much bigger tax issues further down the line.
