MSTR Cat

Crypto Law/Level VIII · Around the world/8.2 Europe/Lesson 6

United Kingdom

Outside the EU, the UK is building its own crypto regime and has gone further than most on property law, while HMRC taxes crypto as capital assets with share-style matching rules and its own version of CARF reporting.

Education, not legal, tax or investment advice. Crypto law differs between countries and states and changes often. Check the current rules where you live with a qualified lawyer or tax adviser before you act.

The lean path

The cheapest, lowest-tax, simplest and most private route the law allows, best first. Each step names the rule it rests on and the condition that keeps it lawful.

  1. Holding is not a disposal, and gifts to a spouse or civil partner are not taxable disposals. Each tax year the first GBP 3,000 of total gains is tax-free. Catch: gifts to anyone else count as disposals at market value.
  2. Keep gains within the basic-rate band where possible: since 30 October 2024 crypto gains are taxed at 18% there and 24% above. Catch: swaps and spending crypto are disposals too.
  3. Claim losses: you have up to 4 years after the end of the tax year of the disposal to report them, and unused losses carry forward. Catch: a loss must be reported to HMRC before it can be used.
  4. Do not sell and rebuy within 30 days to harvest a loss: HMRC matches same-day, then 30-day acquisitions before the section 104 pool. Catch: the 30-day rule makes a quick rebuy cancel the loss.
  5. Report gains above the allowance through Self Assessment’s cryptoasset section, or through the real-time service by 31 December after the tax year, paying by 31 January. Catch: from 2027, CARF reports give HMRC your 2026 platform data.

MaterialsHMRC Cryptoassets Manual, especially CRYPTO22200 on poolingThe Property (Digital Assets etc) Act 2025 on legislation.gov.ukHMRC guidance ‘Reporting cryptoasset user and transaction data’ (CARF)Lesson 3.3.4, which sets out the FCA regime and its 2027 start date

Wonder

  1. Is crypto legally ‘property’ in England, and why does that matter if it is stolen?
  2. How does HMRC work out the cost of coins bought at many different prices?
  3. Will UK exchanges report my activity to HMRC even though the UK left the EU?

Explore

  1. The UK sits outside MiCA and DAC8, so it differs from the EU on regulation, property law and tax. Lesson 3.3.4 covers the FCA regime: anti-money-laundering registration since 10 January 2020, financial promotion rules since 8 October 2023, and authorisation under the Financial Services and Markets Act 2000 (Cryptoassets) Regulations 2026, applying in full from 25 October 2027. One retail product changed sooner. The FCA had banned the sale of crypto exchange-traded notes to retail consumers, and lifted that ban with effect from 8 October 2025, provided the notes trade on a UK Recognised Investment Exchange and the financial promotion rules are followed.
  2. English courts moved first on property. In AA v Persons Unknown [2019] EWHC 3556 (Comm), Bryan J granted a proprietary injunction over bitcoin paid as a ransom, holding on 13 December 2019 that bitcoin met the classic criteria for property, drawing on the UK Jurisdiction Taskforce’s November 2019 statement. That mattered because a proprietary claim lets a victim follow and recover the asset itself, not just sue for money. The difficulty was that English law traditionally recognised only two kinds of personal property, things in possession and things in action, and crypto fits neither neatly. Victims, exchanges and insolvency practitioners therefore relied on case-by-case reasoning.
  3. Parliament addressed that gap. The Property (Digital Assets etc) Act 2025 received Royal Assent on 2 December 2025, based closely on Law Commission recommendations. Its section 1 provides that a thing, including one that is digital or electronic in nature, is not prevented from being the object of personal property rights merely because it is neither a thing in possession nor a thing in action. The Act is short on purpose: it confirms a possible third category and leaves the courts to develop the detail, for example on control, transfer and custody. This differs from the EU, where MiCA regulates market activity but leaves the private-law status of crypto to each member state.
  4. For tax, HMRC treats crypto held by individuals as a capital asset. Gains above the annual exempt amount of GBP 3,000 are taxed at 18% within the basic-rate band and 24% above it, the rates that have applied to disposals since 30 October 2024. Disposals include selling for pounds, swapping one token for another, and spending crypto. HMRC’s manual at CRYPTO22200 applies share-style matching: tokens of one type sold are first matched with tokens of that type acquired the same day, then with those acquired in the next 30 days, and only then with a section 104 pool holding the average cost of each token type. Non-fungible tokens are not pooled.
  5. The UK has adopted the OECD’s Crypto-Asset Reporting Framework (lesson 7.2.7) with a domestic twist. Providers offering crypto services in the UK must collect user details from 1 January 2026 and report on users resident for tax in the UK as well as in other CARF countries. HMRC guidance says the first report must be submitted between 1 January and 31 May 2027 for calendar year 2026, then by 31 May each year, with penalties of up to GBP 300 per user for failures. HMRC already writes to holders it suspects of under-reporting: accounting firm UHY Hacker Young, citing HMRC figures, reported 64,982 such ‘nudge’ letters in 2024/25, up from 27,713 a year earlier.
  6. Enforcement shows the stakes. On 11 November 2025 Zhimin Qian was sentenced at Southwark Crown Court to 11 years and 8 months after pleading guilty to possessing illegally obtained cryptocurrency and money laundering; the Metropolitan Police seized more than 60,000 bitcoin, the UK’s largest crypto seizure. The Crown Prosecution Service said the fraud behind it had more than 128,000 victims in China, and that it would pursue confiscation and civil proceedings over assets then worth about GBP 4.8 billion. A practical check for a UK taxpayer: keep a log of every acquisition and disposal by token type and date, so that the same-day, 30-day and pool rules can be applied before filing.

Key facts

  • In AA v Persons Unknown [2019] EWHC 3556 (Comm), Bryan J treated bitcoin as property for the purpose of a proprietary injunction.
  • The Property (Digital Assets etc) Act 2025 received Royal Assent on 2 December 2025.
  • Since 30 October 2024, UK individuals pay Capital Gains Tax at 18% or 24% on gains above the GBP 3,000 annual exempt amount.
  • HMRC matches crypto disposals first with same-day acquisitions, then acquisitions within 30 days, then the section 104 pool.
  • UK crypto providers must submit their first CARF report between 1 January and 31 May 2027, covering UK-resident users as well as residents of other CARF countries.
  • Zhimin Qian was sentenced to 11 years and 8 months on 11 November 2025 in a case involving more than 60,000 seized bitcoin.

Exercise nine, six, three, one

9CollectList up to 9 crypto disposals, swaps or acquisitions from one UK tax year, yours or a published example, with dates and token types.
6ClusterSort them into 6 groups: same-day matches, 30-day matches, pooled disposals, NFT disposals, disposals for goods or services, and items whose cost you cannot yet show.
3DistillReduce the 6 to 3: the items most likely to make your figures differ from what a platform’s CARF report would suggest.
1CrystallizeWrite 1 sentence describing how the UK’s property, tax or reporting rules would change the way you keep crypto records.

Fact check

Dates, figures and claims checked against the published sources listed below.

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