The UK’s latest Budget leaves headline crypto tax rules unchanged but tightens the wider environment for traders.
Meanwhile, HMRC signals a major rethink on how it taxes DeFi lending and liquidity provision.
No New “Crypto Tax,” But Pressure Still Rises
Chancellor Rachel Reeves did not introduce any crypto-specific tax in the 2025 Budget. There is no new levy on trading, holding, or spending digital assets.
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However, the Budget extends income-tax threshold freezes for three more years. As wages rise, more taxpayers drift into higher bands, including active crypto traders.
The capital gains tax (CGT) allowance remains very low compared to historic levels. That means more crypto disposals trigger reportable gains, even for modest retail portfolios.
At the same time, the UK is pushing ahead with global data-sharing under new reporting standards.
Exchanges and platforms will supply more detailed customer information to HMRC from 2026.
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HMRC Backs Away From Its Hard Line on DeFi
Alongside the Budget, HMRC published a consultation outcome on DeFi lending and staking. It responds to strong criticism of its 2022 guidance on loans and liquidity pools.
Stakeholders told HMRC that current rules create disproportionate administrative burdens. They warned that treating every DeFi move as a disposal bears little relation to economic reality.
In response, HMRC has dropped its earlier idea of copying repo and stock lending rules. It now prefers a framework based on “no gain, no loss” (NGNL) for many DeFi flows.
Crucially, the department accepts that automated market makers represent a major share of activity. It signals that any new rules should explicitly cover Uniswap-style multi-token liquidity pools.
Proposed NGNL Rules for DeFi Loans and Liquidity Pools
HMRC now outlines a potential NGNL approach for three areas. These are single-token arrangements, crypto borrowing, and automated market makers.
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For single-token lending, entering and exiting a platform could be NGNL for CGT. The real gain or loss would arise only when the user finally sells the token.
For borrowing, posting collateral and taking out tokens would be ignored for CGT. Selling borrowed tokens and later buying them back to repay would crystallise the gain or loss.
For AMMs, HMRC proposes NGNL treatment when users deposit tokens for LP positions. Tax would then focus on differences in the number of tokens received when they exit.
If users receive more of a token than they originally deposited, the extra counts as a gain. But if they receive fewer, the shortfall is treated as a loss against their tax base.
HMRC stresses that this is still a “potential approach,” not enacted law. It will continue consultations before deciding whether to legislate.
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DeFi Rewards: No New “All Income” Rule – For Now
One of the most controversial ideas was to treat all DeFi rewards as income. Respondents warned that this would ignore capital versus revenue distinctions and create dry tax charges.
HMRC now says it is not actively pursuing an “all revenue” deeming rule. Rewards will continue to follow existing principles for now.
What This Means for UK Crypto Traders
For spot traders on centralised exchanges, the Budget brings no direct structural change. CGT still applies on each disposal, and income tax applies where trading amounts to a trade.
However, the combination of frozen thresholds and low CGT allowances increases effective tax pressure.
More active traders will breach reporting thresholds and face higher marginal rates on gains. HMRC expects more users to use portfolio tracking software to support their filings.
Source: https://beincrypto.com/uk-budget-2025-crypto-traders-defi-tax-changes/
