DeFi, Staking and Yield Farming: UK Tax Treatment Explained

The UK tax treatment of cryptocurrency has become progressively more detailed as HMRC has grappled with the extraordinary diversity of blockchain-based activities. Simple "buy and hold" crypto — acquiring Bitcoin or Ethereum and selling at a gain — is reasonably straightforward (CGT on the gain, cost basis tracking required). The far more complex questions arise around the newer activities: DeFi lending, liquidity provision, staking, yield farming, airdrops, hard forks, and algorithmic stablecoins.

This guide sets out the current HMRC position, identifies the genuine grey areas, and explains what UK taxpayers with these activities need to do.

HMRC's Cryptocurrency Guidance: The Framework

HMRC published its consolidated Cryptoassets Manual in March 2021 (building on earlier policy papers from 2018–2019) and has updated it several times since. The core framework distinguishes between capital transactions (producing CGT) and income transactions (producing income tax or potentially trading income).

Capital gains tax (CGT) applies to the disposal of cryptoassets. A disposal includes:

• Selling cryptocurrency for sterling
• Trading one cryptocurrency for another (crypto-to-crypto is a disposal of the first asset)
• Using cryptocurrency to pay for goods or services
• Giving cryptocurrency away (treated as disposal at market value)

The pool rule: HMRC uses a "Section 104 pool" approach — all tokens of the same type are treated as a single pool with a pooled average cost basis. New purchases are added to the pool; disposals are matched against the pool at the average cost. This is different from the specific lot identification used in some other jurisdictions.

Same-day and 30-day rules: to prevent "bed and breakfasting" (selling and immediately repurchasing), disposals are matched first against purchases on the same day, then against purchases in the 30 days following the disposal, and only then against the pool.

Staking: Income or Capital?

Staking involves locking up cryptocurrency to validate blockchain transactions (Proof of Stake networks). In return, the staker receives new tokens as a reward.

HMRC's current position (as set out in the Cryptoassets Manual): staking rewards are generally treated as miscellaneous income if received by individuals not carrying on a trade. The income is assessed at the market value of the tokens on the date of receipt.

The tax consequences:

• Income tax at marginal rates (up to 45%) on receipt of staking rewards
• A second tax charge (CGT) when the received tokens are subsequently sold — the cost base for CGT is the value at the time of income recognition

Example: you stake 10 ETH and receive 0.5 ETH as rewards when ETH is trading at £3,000. Income of £1,500 (0.5 ETH × £3,000) is assessed in the year of receipt. If you subsequently sell the 0.5 ETH at £4,000, you have a CGT gain of £500 (£2,000 proceeds − £1,500 cost base).

Key uncertainty: HMRC's guidance acknowledges that some staking activity might constitute trading (particularly where validators operate a staking-as-a-service business at scale), in which case trading income rules apply. For most individual validators, miscellaneous income is the appropriate treatment.

DeFi Lending: Loan or Disposal?

Decentralised Finance (DeFi) lending involves depositing cryptocurrency into a protocol (like Aave or Compound) in exchange for interest payments and typically receiving a receipt token representing your deposit.

The controversial question: when you deposit crypto into a DeFi lending protocol, have you disposed of it (triggering CGT on any gain in the deposited asset) or merely lent it (no disposal)?

HMRC's published position (2022 update): HMRC's view is that the tax treatment depends on the specific nature of the arrangement. Where the taxpayer retains beneficial ownership of the deposited crypto and can get it back on demand, no disposal occurs on deposit. Where beneficial ownership transfers (as in some automated market maker liquidity provisions), a disposal does occur.

In practice: the distinction is technically complex and the smart contract terms of each protocol matter. Many DeFi arrangements involve transfer of title, triggering a disposal on deposit and a further disposal on withdrawal of different tokens. This creates a complex CGT calculation even where the underlying economic position is a simple loan.

Interest received: interest payments received from DeFi lending (typically in the protocol's native token or in the deposited token) are taxable as income — either as savings income (if analogous to bank interest) or miscellaneous income. HMRC's guidance suggests miscellaneous income is the likely category for most DeFi interest.

Yield Farming and Liquidity Mining

Yield farming involves providing liquidity to decentralised exchanges (like Uniswap or Curve) and receiving fees and governance tokens in return.

The tax treatment involves multiple layers:

1. Depositing into a liquidity pool: treated as a disposal of the deposited assets in most cases (see DeFi lending discussion above)

2. Receiving LP tokens: the LP tokens received in exchange are acquired at the market value of the deposited assets (equal to the deemed disposal proceeds)

3. Receiving yield/governance tokens: new tokens received as yield are income at market value on receipt (similar to staking rewards)

4. Withdrawing from the pool: treated as a disposal of the LP tokens, with the withdrawn assets representing the proceeds. This creates a further CGT calculation.

5. Impermanent loss: this is a real economic cost of liquidity provision but is not separately recognised as a tax deduction in HMRC's current guidance — it is only reflected in the lower value of assets on withdrawal.

The cumulative record-keeping burden for active yield farmers is very high. Each swap, deposit, withdrawal, and token receipt must be tracked with sterling values at the time of the transaction.

Hard Forks and Airdrops

Hard forks: when a blockchain splits into two chains (as happened with Bitcoin/Bitcoin Cash in 2017, for example), holders of the original asset receive an equivalent amount of the new asset. HMRC's position is that receipt of new tokens from a hard fork is generally not an income event — rather, the original cost base is split between the original and new tokens based on their relative market values.

Airdrops: airdrops (gratuitous receipt of tokens without any reciprocal activity) are more variable in treatment:

• If received without any action on the recipient's part: likely not income
• If received in connection with a service, trading activity, or promotional arrangement: likely miscellaneous income at market value on receipt
• In either case, the cost base for future CGT purposes is the value assessed as income (or nil if not income)

The common complication: many airdrops are received as part of "retroactive" reward programmes — where a protocol rewards historical users. HMRC guidance does not specifically address these; the most defensible position is that they represent miscellaneous income at market value on the date the tokens become accessible.

Record-Keeping: The Practical Challenge

HMRC requires taxpayers to keep records sufficient to calculate their tax liability. For cryptocurrency, this means:

• Date of every transaction
• The cryptocurrency involved and amount
• The consideration received (or paid) in sterling
• Any other relevant information (the counterparty where known, the nature of the transaction)

The volume challenge: an active DeFi user might execute hundreds or thousands of transactions per year across multiple chains and protocols. Manual record-keeping is not practical.

Tools: dedicated crypto tax software (CoinTracker, Koinly, TaxBit, CryptoTaxCalculator) can connect to wallets and exchanges via API or CSV import and produce HMRC-compatible calculations. These tools are imperfect — particularly for complex DeFi transactions — but are substantially better than manual approaches.

Which records to keep: in addition to the transaction data, keep records of wallet addresses, exchange account statements, and any contemporaneous evidence of the sterling values applied.

Voluntary Disclosure

HMRC has made it clear that cryptoasset income and gains are within UK tax. The CRS (Common Reporting Standard) does not currently capture crypto held in self-custody wallets, but crypto exchange accounts (Coinbase, Kraken, Binance) are increasingly reporting to HMRC, and the OECD's Crypto-Asset Reporting Framework (CARF) will further extend automatic information exchange.

For UK taxpayers who have not previously declared crypto income and gains, the relevant route is:

• Voluntary disclosure via HMRC's online disclosure service for offshore assets — crypto counts as a foreign asset if held on overseas exchanges
• Direct self-assessment disclosure for UK-held crypto where prior returns were incorrect

Voluntary disclosure before HMRC enquires attracts lower penalties than those applied when HMRC discovers the undisclosed liability. The standard penalty for careless behaviour is 15–30%; for deliberate behaviour, 45–100% of unpaid tax.

Time limits: HMRC can generally look back four years for innocent error, six years for careless failure, and 20 years for deliberate failure. Crypto activities from 2016 onwards may therefore be within scope.

How Global Investments Can Help

Global Investments works with clients who have significant cryptocurrency positions as part of broader wealth planning. We facilitate introductions to specialist crypto-tax advisers who can review historical positions, prepare voluntary disclosures where appropriate, and structure future holdings to minimise unnecessary complexity. We also advise on how crypto assets interact with offshore investment structures and estate planning.

HMRC's guidance on cryptoassets continues to evolve. This article reflects our understanding of the position as of mid-2026 and is intended as general information only — it does not constitute tax advice. Tax rules may differ depending on individual circumstances. Always seek qualified professional advice before acting on information about crypto taxation.