Quick answer
Impermanent loss is the value you lose by being in a liquidity pool instead of just holding — and whether you can deduct it for tax is deeply unsettled.
DeFi & Web3
Australia
Canada
Germany
United Kingdom
United States
Impermanent Loss
The temporary loss in value experienced by liquidity providers when the price of deposited tokens changes relative to when they were deposited.
AustraliaCanadaGermanyUnited KingdomUnited StatesUnderstanding Impermanent Loss on crypto
Impermanent loss (IL) occurs when you deposit two tokens into a liquidity pool and the price ratio between them changes after deposit. Automated market makers rebalance continuously, meaning you end up with more of the token that fell in price and less of the one that rose. The loss is 'impermanent' because it reverses if prices return to the original ratio — but becomes permanent when you withdraw during price divergence. The tax treatment of IL is one of the most contested areas in crypto tax. The core questions: does depositing constitute a disposal? Is IL itself deductible? No jurisdiction has issued fully definitive guidance.
Impermanent loss (IL) occurs when you deposit two tokens into a liquidity pool and the price ratio between them changes after deposit. Automated market makers rebalance continuously, meaning you end up with more of the token that fell in price and less of the one that rose. The loss is 'impermanent' because it reverses if prices return to the original ratio — but becomes permanent when you withdraw during price divergence. The tax treatment of IL is one of the most contested areas in crypto tax. The core questions: does depositing constitute a disposal? Is IL itself deductible? No jurisdiction has issued fully definitive guidance.
What this means for your crypto activity
Deposit may trigger CGT
If depositing into a pool is treated as a disposal (likely in US and UK), CGT may arise before any fees are earned.
IL not directly deductible
IL itself is generally not directly deductible as a capital loss — only the net position on withdrawal may create a loss.
Complex LP cost basis
LP token cost basis calculation is complex, especially across continuous rebalancing.
Pool yield taxed separately
Pool yield (fees, reward tokens) is taxable income received separately from the IL calculation.
Withdrawal is disposal
Withdrawing from the pool creates a disposal event on the LP tokens — triggering another gain/loss calculation.
- If depositing into a pool is treated as a disposal (likely in US and UK), CGT may arise before any fees are earned.
- IL itself is generally not directly deductible as a capital loss — only the net position on withdrawal may create a loss.
- LP token cost basis calculation is complex, especially across continuous rebalancing.
- Pool yield (fees, reward tokens) is taxable income received separately from the IL calculation.
- Withdrawing from the pool creates a disposal event on the LP tokens — triggering another gain/loss calculation.
Seeing it in action
Example scenario
Marcus deposits 1 ETH ($2,000) and 2,000 USDC into Uniswap. ETH rises to $4,000. On withdrawal he receives 0.707 ETH ($2,828) and 2,828 USDC — totalling $5,656 vs $6,000 if held. The $344 difference is IL. However, his taxable calculation focuses on the LP token disposal gain/loss, not the IL amount directly. The $344 IL is embedded in the net position rather than directly deductible.
How this works across jurisdictions
- Australia
ATO general CGT principles apply; deposit likely a disposal; IL reduces net gain but is not a standalone deductible loss.
- Canada
LP deposit likely a disposition; IL embedded in net position; 50% inclusion on net capital gain.
- Germany
Deposit likely a disposal; IL not directly recognised; 1-year holding period clock may reset on deposit.
- United Kingdom
HMRC's 2023 DeFi guidance treats deposit as disposal if beneficial ownership transfers; IL not separately deductible.
- United States
No IRS guidance on IL; practitioners treat deposit as disposal and withdrawal as another disposal; IL not separately deductible.
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