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Does HMRC Know About My Crypto Profits? A Beginner’s Guide for UK Investors
Ruby Layram
27th May 2026
Cryptocurrency investing has exploded in popularity over the past few years, as more and more investors uncover the benefits of diversifying with crypto.
From Bitcoin and Ethereum to meme coins and AI tokens, millions of people in the UK now own some form of crypto asset. But as crypto has become more mainstream, one big question keeps coming up.
Does HMRC Know About my Crypto Profits?
The short answer? Potentially, yes.
And in 2026, HMRC is paying much closer attention to cryptocurrency activity than ever before. But that does not mean crypto investors need to panic.
In this guide, we’ll explain:
- How HMRC tracks crypto activity
- Whether crypto is taxable in the UK
- What happens if you don’t report profits
- How crypto tax actually works
- What UK investors should know in 2026
If you’re new to crypto investing, don’t worry, we’ll cover everything you need to know.
Is Crypto Taxed in the UK?
Yes.
In the UK, cryptocurrency is generally treated as an investment asset by HMRC, rather than as currency.
Also read: Are crypto gains taxable in the UK?
That means you may need to pay tax when you:
- Sell crypto for profit
- Swap one cryptocurrency for another
- Spend crypto
- Gift crypto to someone other than your spouse, civil partner or a charity
The most common tax involved is usually Capital Gains Tax (CGT). But Income Tax can also apply if you earn crypto through mining, staking, DeFi rewards, airdrops linked to an action, or being paid in crypto for work.
CGT applies when you make a profit from disposing of crypto assets.
For example:
- Buying Bitcoin at £5,000 and selling at £10,000
- Swapping Ethereum into Solana after a price increase
- Selling crypto for pounds sterling
Even if you never move money back into your bank account, taxable events can still occur.
That’s something many beginners don’t realise.
So, Does HMRC Actually Know About My Crypto?
Potentially yes.
Many crypto investors still assume crypto is completely anonymous.
But in reality, most major crypto platforms now operate under strict regulations and compliance rules.
Also read: 3 Common Crypto Tax Mistakes Beginners Make
This means exchanges may collect information including:
- Your identity
- Transaction history
- Trading activity
- Wallet information
And in some situations, that information can be shared with regulators and tax authorities.
Crypto Exchanges Are Becoming More Transparent
Large crypto platforms increasingly operate under:
- Know Your Customer (KYC) rules
- Anti-money laundering regulations
- Financial reporting requirements
This means users are often required to provide:
- Photo ID
- Address verification
- Personal information
As regulation around crypto tightens globally, governments are becoming much more focused on improving tax reporting and compliance.
HMRC Has Increased Its Focus on Crypto
HMRC has become far more active in monitoring cryptocurrency activity in recent years.
This includes:
- Sending warning letters to investors. Almost 65,000 “nudge” letters were sent in 2024/25 alone, a 134% jump on the previous year
- Requesting data from exchanges
- Increasing crypto compliance activity
- Expanding guidance around crypto taxation
In 2026, crypto is no longer operating in a “wild west” environment.
Tax authorities around the world are paying increasing attention to digital assets.
What’s Changing in 2026?
This is the big one. From 1 January 2026, the UK has implemented the Cryptoasset Reporting Framework (CARF). This a new set of international rules designed to give tax authorities much better visibility over crypto activity.
In practice, this means UK-based crypto firms must now:
- Collect tax residency and identity information from their users
- Record details of their users’ crypto transactions
- Report all of that data to HMRC each year
The first report to HMRC is due by 31 May 2027, covering activity during 2026. HMRC will also share this data with tax authorities in other countries that have signed up to the framework.
In short: from 2026 onwards, assuming you use a regulated UK exchange, the question of whether HMRC “knows” about your crypto is becoming less of an “if” and more of a “when.”
What Happens If You Don’t Report Crypto Profits?
This really depends on the situation.
Mistakes can happen, especially because crypto tax rules can be confusing for beginners.
However, deliberately failing to report taxable gains could potentially lead to:
- Penalties
- Interest charges
- Investigations
- Additional tax liabilities
That’s why many investors now use crypto tax software, accountants or portfolio tracking tools to help them stay organised.
Common Crypto Tax Mistakes Beginners Make
Many new investors accidentally misunderstand how crypto tax works.
Here are some common examples.
“I only owe tax if I cash out to my bank”
Not necessarily.
In the UK, swapping one cryptocurrency for another can still create a taxable event.
For example:
- Bitcoin → Ethereum
- Ethereum → Solana
Even if no cash is involved.
“Small trades don’t matter”
Frequent trading can actually make tax reporting more complicated.
Every trade may need to be tracked! So, only make trades that are necessary for your strategy!
“Crypto is anonymous”
Blockchain transactions are publicly recorded.
And many crypto exchanges now operate with strict identity verification processes.
How to Stay Organised as a Crypto Investor
If you invest in crypto, good record-keeping is incredibly important.
That includes tracking:
- Purchase prices
- Sale prices
- Dates of transactions
- Wallet transfers
- Fees
Many investors now use crypto tax tools to simplify this process. The earlier you stay organised, the easier tax reporting becomes later.
What About Long-Term Crypto Investors?
Some investors buy crypto and simply hold it long term.
In many cases, simply holding cryptocurrency does not usually create a taxable event on its own.
Tax is generally triggered when assets are disposed of or exchanged.
However, rules can vary depending on:
- Staking rewards
- Airdrops
- DeFi activity
- NFT transactions
Crypto taxation can become more complex as investing activity increases.
Why Regulation Is Increasing in 2026
Governments globally are trying to balance two things:
- Supporting innovation
- Improving consumer protection and tax compliance
As crypto becomes more mainstream, regulation is becoming more sophisticated.
That includes:
- Stablecoin regulation
- Exchange oversight
- Investor protection rules
- Tax reporting requirements
For long-term investors, this could eventually help make the crypto industry more mature and trusted.
Final Thoughts
So, does HMRC know about your crypto profits?
Potentially yes, especially if you use major regulated exchanges, and from 2026 onwards, increasingly by default thanks to the new CARF reporting rules.
But that doesn’t mean crypto investing is something to fear.
The key thing is understanding:
- Crypto may be taxable
- Record-keeping matters
- Regulation is increasing
- Transparency is becoming more common across the industry
For beginners, the best approach is usually to stay informed, stay organised, and understand the rules before investing heavily.
As crypto continues moving into the financial mainstream, treating your investments responsibly becomes more important than ever.
Looking for a Beginner-Friendly Crypto Platform?
CoinJar is designed to make buying, selling and managing digital assets simpler for everyday investors.
Whether you’re just getting started or building a long-term crypto portfolio, using a , user-friendly platform can help make navigating the crypto world much easier.
| The above article is not to be read as investment, legal or tax advice and it takes no account of particular personal or market circumstances; all readers should seek independent investment advice before investing in cryptocurrencies. The article is provided for general information and educational purposes only, no responsibility or liability is accepted for any errors of fact or omission expressed therein. Past performance is not a reliable indicator of future results. |
| Standard Risk Statement |
| UK residents are required (in accordance with local legislation) to complete an appropriateness assessment to show they understand the risks associated with what crypto/investment they are about to buy and enabling CoinJar to categorize them as an investor. New customers are also required under local regulations to wait 24-hours as a “cooling off” period (from account creation), before their account is active (i.e. to deposit, trade, withdraw etc.). |
| Cryptocurrency is currently not regulated in the UK. It’s vital to understand that once your money is in the crypto ecosystem, there are no rules to protect it, unlike with regular investments. You should not expect to be protected if something goes wrong. So, if you make any crypto-related investments, you’re unlikely to have recourse to the Financial Services Compensation Scheme (FSCS) or the Financial Ombudsman Service (FOS) if something goes wrong. |
| Remember: |
| Don’t invest unless you’re prepared to lose all the money you invest. This is a high‑risk investment and you should not expect to be protected if something goes wrong. Take 2 minutes to learn more: www.coinjar.com/uk/risk-summary. |
| If you use a credit card to buy cryptocurrency, you would be putting borrowed money at a risk of loss. We recommend you obtain financial advice before making a decision to use your credit card to purchase cryptoassets or to invest in cryptoassets. |
| Note the standard risk warning from the CoinJar website. |
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