HMRC has published detailed guidance on DeFi lending, liquidity pools, and yield farming. The rules are complex but specific — and the income vs capital distinction will determine your tax bill.
Important Risk Warning
This is not financial advice. Cryptocurrency investments are highly volatile. The value of your investment can go down as well as up, and you could lose all the money you invest. Don't invest unless you're prepared to lose all the money you put in.
London — Decentralised finance has a reputation as the wild west of crypto, but HMRC has been quietly building one of the most detailed sets of guidance on DeFi taxation anywhere in the world. It's buried in the Cryptoassets Manual, it runs to dozens of sections, and — unusually for HMRC — it actually makes a reasonable attempt to grapple with how these protocols work in practice.
The key questions for UK DeFi users are two. First: does depositing assets into a lending protocol or liquidity pool constitute a disposal that triggers a capital gain immediately? Second: is the yield you receive on those assets taxed as income or as a capital return? The answers to both have changed recently, and the position is still evolving.
Under traditional CGT principles, transferring crypto to a DeFi protocol in exchange for a different token (say, ETH for Aave's aETH, or a Uniswap LP token) looks like a token-for-token swap — a taxable disposal. For years, that was the de facto position, and it created an obvious problem: investors were potentially triggering CGT simply by depositing assets they had no intention of selling.
HMRC's consultation and internal manual guidance has moved towards what it calls a "no gain, no loss" treatment for certain DeFi lending and staking transactions, where beneficial ownership genuinely transfers back. The idea is that the LP or wrapped token you receive represents a right to reclaim the same underlying assets — so economically, you haven't disposed of them. The transfer is treated as if no CGT event occurred.
The catch is that this treatment doesn't apply universally. It depends on the specific structure of the protocol and whether HMRC accepts that no beneficial ownership of the underlying tokens has genuinely passed. Automated market maker (AMM) protocols like Uniswap are explicitly on HMRC's radar for an extension of this treatment — but it's not yet settled law, so caution is warranted.
When you do earn returns from DeFi — interest on Aave, swap fees from a Uniswap pool, rewards from a lending protocol — HMRC's guidance says the tax treatment depends on the nature of that return.
If the return was agreed in advance and is expressed as a rate — "5% APY for supplying USDC" — HMRC expects to treat it as income, in the same way as interest from a bank. That means income tax at your marginal rate, not CGT at the lower 18 or 24%.
If the return is uncertain and speculative — you're providing liquidity and the fee income is entirely unknown because it depends on trading volume — HMRC leans towards treating it as a capital receipt. That's better news for higher-rate taxpayers, who'd rather pay 24% CGT than 40% income tax.
In practice, most lending protocols publish fixed or advertised rates, and most will be treated as income. Liquidity provision in volatile trading pairs — where your return fluctuates significantly and could be negative — has a stronger argument for capital treatment.
One area where HMRC's guidance is noticeably thin is impermanent loss — the reduction in value liquidity providers suffer when the relative price of the two assets in a pool diverges. If you provide ETH/USDC liquidity and ETH doubles, you end up with less ETH than you started with because the AMM rebalanced your position. The loss relative to simply holding is real and meaningful.
HMRC has not explicitly addressed whether impermanent loss can be claimed as an allowable capital loss. The general position is that if the LP token disposal results in an overall loss compared to the original cost base, that loss should be claimable. But the mechanics of calculating it through LP token positions are not straightforward, and no specific published guidance exists.
Most DeFi protocols distribute governance tokens to liquidity providers and lenders as additional incentives — UNI, COMP, CRV and the like. Each distribution is likely to be treated as miscellaneous income (see HMRC's airdrops guidance) unless received as part of a recognisable service. The value at the date of receipt is the taxable income figure; any subsequent gain on the governance token is a separate CGT event.
HMRC ran a public consultation in 2023 on formalising the no-gain-no-loss approach for DeFi and published its response. The government indicated support for the principle but noted that legislative change would be needed. As of 2025, that legislation has not yet been enacted, meaning the current uncertainty persists. Watch for a Finance Bill clause in the coming year that formally codifies the NGNL treatment — it would significantly reduce the tax drag on legitimate DeFi participation for UK investors.
We use cookies to enhance your experience. By clicking "Accept", you agree to our use of cookies for analytics. See our Privacy Policy.
