For crypto operators with UK operations and cross-border group structures, two tax issues consistently generate the greatest exposure: the mischaracterisation of DeFi returns, and the absence of transfer pricing documentation for UK/UAE intra-group charges. Both are filing obligations that apply from the first year of operation. In this chapter, the analysis is limited to two specific areas, which do not, however, exhaust the range of tax issues that may affect crypto businesses.
Part One: DeFi Yield Farming — Income or Capital?
The question of whether returns from DeFi activities constitute income or capital for UK corporation tax purposes is not settled by the nature of the activity alone. It is determined by a combination of the type of DeFi protocol involved, the structure of the position, the nature of the return received, and the taxpayer’s intention and business model.
HMRC Cryptoassets Manual provides a structured framework for analysing crypto transactions, but it does not provide definitive treatment for many of the newer, more complex structures now in common use.
This paper focuses on the tax treatment of DeFi transactions and not on financial‑services regulation[1].
The Core Distinction
The starting point is the distinction between income returns and capital revaluation. In UK tax law, a receipt is income if it is the product of an income-producing activity — a return earned periodically as compensation for the use of value — and capital if it represents an increase in the underlying asset value.
For DeFi activities, HMRC’s guidance distinguishes broadly between:
- Lending and borrowing protocols — where crypto assets are lent against collateral, the yield received is treated as interest and taxed as income at the point of receipt or accrual.
- Liquidity provision to AMMs — where the provider deposits tokens into an automated market maker pool and receives LP tokens, the yield received — whether trading fees or incentive tokens — is typically income. The deposit itself may or may not constitute a disposal of the deposited tokens depending on whether the LP tokens are substantially the same as the original position.
- Yield aggregators and auto-compounders — where the protocol automatically reinvests returns into the underlying position, the income may accrue on each reinvestment event, not only at final withdrawal.
The Impermanent Loss Problem
Under HMRC’s evolving approach, the economic effect of impermanent loss is generally deferred (no allowable expense) until an “economic disposal” of the underlying crypto assets takes place. In practical terms, this means that fluctuations in the pool (including impermanent loss) do not create deductible losses on a standalone basis; instead, CGT is computed only when the LP position is closed, by comparing the sterling value of the crypto assets received with the sterling value of the crypto assets originally deposited[2].
COMMON ERROR
Many crypto operator P&Ls record DeFi yield as a net figure — value received on withdrawal less value deposited — without distinguishing the income element (trading fees and incentive tokens earned during the period) from the capital element (the gain or loss on the underlying position). This produces a single line that is neither correctly taxed as income nor correctly computed as a capital gain.
Protocol Tokens as Incentive Returns
Where DeFi protocols distribute their native governance or utility tokens as an incentive for liquidity provision, HMRC’s position is that these tokens are received as income at the point of receipt, at the market value at that date. This creates a tax liability regardless of whether the tokens are sold. Where the tokens are later sold, the capital gain or loss is computed by reference to the sterling value at the date of receipt (which becomes the base cost) and the sterling proceeds on disposal.
What the Corporation Tax Return Must Show
A crypto operator’s corporation tax computation for a year in which it has conducted DeFi activities must include:
- A schedule of income receipts from lending protocols, disaggregated by protocol and by period
- A schedule of trading fee income from AMM liquidity positions, by pool
- A schedule of incentive token receipts, with sterling value at date of receipt, by protocol and by date
- A capital gains computation for each LP position exited during the year
- A reconciliation of total DeFi-related receipts to the figure in the P&L, with any adjustments noted
This is not a task that can be completed at year-end from a P&L that contains a single ‘DeFi income’ line. The data needs to be captured at source, throughout the year, with enough granularity to support the tax computation.
Part Two: Transfer Pricing in Crypto Groups
The majority of UK-regulated crypto operators with any international dimension have a multitude of business relationships with multi jurisdictions entities.
As an example, a UK company may be connected with a UAE entity in the same group structure. Where a UK entity and a UAE entity within the same group transact with each other, UK transfer pricing rules apply from the first year of operation.
The Legal Basis
UK transfer pricing rules are set out in TIOPA 2010, Part 4. The legislation applies to any transaction between connected persons where the actual terms differ from the arm’s length terms that would have been agreed between independent parties in comparable circumstances. Where the arm’s length result would have produced greater UK taxable profits, the UK entity’s taxable profits are increased accordingly.
The arm’s length standard is defined by reference to the OECD Transfer Pricing Guidelines, which HMRC treats as the authoritative guidance. The Guidelines set out five primary transfer pricing methods — the comparable uncontrolled price method, the resale price method, the cost-plus method, the transactional net margin method, and the profit split method. The choice of the method relies on the taxpayer: in crypto world, the two main approaches are the cost-plus and the comparable uncontrolled price, but it is vital to understand all circumstance of the business and allocation of risks and functions for a proper selection.
Under UK rules, transfer pricing generally applies mandatorily only to large groups; small and medium‑sized enterprises (SMEs) are normally exempt where they have no more than 250 employees and either turnover or balance‑sheet totals below the EU‑style SME thresholds (for a small enterprise: fewer than 50 employees and turnover or balance sheet not exceeding about €10 million).
The UAE Corporate Tax Dimension
From 1 June 2023, the UAE Federal Corporate Tax Law introduced a corporate tax at 9% on taxable income above AED 375,000. The law contains a transfer pricing chapter, closely aligned with the OECD Transfer Pricing Guidelines, which requires all transactions between related parties and connected persons — including dealings between UAE entities and their UK group companies, and payments to owners, directors and officers (extending de facto the scope of transfer pricing not only to members of a group but also to qualified categories) — to satisfy the arm’s length principle.
SMALL AND LARGE GROUPS
The UK SME exemption does not apply where a UK company has related‑party dealings with entities in certain low‑tax or non‑treaty jurisdictions (non-qualifying): for instance, UAE is not regarded for this purpose as non-qualifying but other offshore jurisdictions (as BVI) are.
Unlike the UK, all UAE taxable persons must price related‑party and connected‑person transactions at arm’s length. However, formal disclosure and documentation obligations are driven by materiality thresholds (starting from AED 500,000 per “connected person”).
Common Intra-Group Charges in Crypto Groups
- Management fees — where the UK entity provides management or strategic services. The fee must be set at an amount that an independent party would pay for comparable services.
- Technology licences — where the trading platform, wallet software, or other technology is owned by one entity and licensed to another. The royalty rate must be benchmarked against comparable licences.
- Intercompany loans — where one group entity lends to another. The interest rate must reflect the credit quality of the borrower and the terms of the loan, benchmarked against comparable third-party debt.
- Cost allocation — where shared costs (staff, premises, technology, compliance) are allocated between group entities. The allocation methodology must be reasonable and consistently applied.
As already said, in certain circumstances, a cost-plus methodology can be acceptable.
What Documentation Is Required
HMRC expects contemporaneous documentation — prepared at the time the transaction is entered into. A transfer pricing documentation package for a crypto group typically includes:
- A description of the group structure and the controlled transactions
- A functional analysis — identifying the functions performed, assets used, and risks assumed by each party
- A comparability analysis — identifying comparable uncontrolled transactions or applying a pricing method with supporting benchmarking data
- A conclusion on the arm’s length range and the price actually charged
- Supporting schedules: intercompany agreements, benchmarking data, fee calculations
The Penalty Exposure
Both issues carry meaningful penalty exposure plus interests. For corporation tax filing errors, HMRC applies a behaviour-based penalty regime: careless errors attract penalties of up to 30% of the potential lost revenue; deliberate errors up to 70%; and deliberate errors concealed from HMRC up to 100%.
A transfer pricing policy can support operations and provide a potential relief from HMRC tax penalties, not to mention that corporate governance requires a robust transfer pricing framework.
Conclusion
DeFi tax treatment and transfer pricing apply to most crypto operators with any UK activity and any international group structure, from the first year of operation. The cost of getting them wrong — in terms of tax exposure, penalty risk, the administrative burden of reconstruction after an HMRC information notice and corporate governance — can trigger to material potential losses and affect the stakeholders (including clients) confidence.
[1] In many jurisdictions, DeFi platforms and protocols still operate in a regulatory grey area, with evolving rules on licensing, investor protection, AML/CTF and reporting. The fact that a DeFi position is taxed (should never be read as implying that the platform, the issuer or the token is “regulated” or compliant for securities, banking or investment‑services purposes.
[2] The UK government has accepted, following its 2023–25 consultation on the taxation of DeFi lending and staking, that the existing disposal‑based model is distortive and has committed to introducing a “no gain, no loss” (NGNL) framework for qualifying crypto lending and liquidity‑pool arrangements, with legislation to amend TCGA 1992 expected to apply from 6 April 2027.
