Quick answer
Impermanent loss is the temporary reduction in dollar value that liquidity providers experience when the price ratio of their deposited tokens changes after they've added liquidity to an AMM pool. It is called 'impermanent' because the loss only crystallises if you withdraw while prices have diverged from the entry price — if prices return to the original ratio, the loss disappears. Impermanent loss is the central risk of providing liquidity in DeFi and must be understood before depositing into any AMM pool.
What is impermanent loss?
When you deposit tokens into an AMM liquidity pool — for example, an ETH/USDC pool on Uniswap — you deposit equal values of both tokens. The AMM protocol then uses those tokens to facilitate trades, adjusting the ratio of tokens in the pool as prices change to maintain its pricing formula (typically x × y = k).
Here is the problem: as prices change, arbitrageurs trade against the pool to bring it in line with the market, which shifts the token ratio inside the pool. When you eventually withdraw your liquidity, you receive a different ratio of tokens than you originally deposited — and in terms of total dollar value, this is often less than if you had simply held both tokens outside the pool.
This shortfall — the difference between your LP position value and the value of simply holding the tokens — is called impermanent loss. It is 'impermanent' because if token prices return to their ratio at the time of your deposit, the loss disappears entirely.
How impermanent loss is calculated
The magnitude of impermanent loss depends on how much the price ratio of your two deposited tokens diverges. The formula is based on the ratio of the new price to the old price. Here is a table showing impermanent loss at different price change multiples for a standard 50/50 AMM pool:
| Price change (one token) | Impermanent loss vs holding |
|---|---|
| 1.25× (25% increase) | ~0.6% loss |
| 1.5× (50% increase) | ~2.0% loss |
| 2× (100% increase) | ~5.7% loss |
| 3× (200% increase) | ~13.4% loss |
| 5× (400% increase) | ~25.5% loss |
| 10× (900% increase) | ~42.5% loss |
When impermanent loss becomes permanent
Impermanent loss becomes a realised (permanent) loss the moment you withdraw your liquidity while the price ratio is different from when you deposited. At that point, the difference between your withdrawn value and the hold value is crystallised.
This means timing of withdrawal matters significantly for liquidity providers. If ETH doubles in price while you are providing ETH/USDC liquidity and you withdraw at that peak, you lock in ~5.7% less than if you had simply held ETH and USDC. If ETH then corrects back to the original price, you would have avoided the loss entirely — but you have already withdrawn.
Impermanent loss affects all standard AMM pools. Higher fee tiers (0.3%, 1%) can compensate for impermanent loss in volatile pairs, but concentrated liquidity positions (Uniswap V3) amplify both fee earnings and impermanent loss when prices move outside your selected range.
How trading fees offset impermanent loss
Liquidity providers earn a share of trading fees generated by their pool — typically 0.01%, 0.05%, 0.3%, or 1% of each swap on Uniswap V3. These fees accumulate constantly and can offset impermanent loss over time.
Whether fees actually cover impermanent loss depends on: the fee tier of the pool, the trading volume the pool generates, and the volatility of the token pair. Stablecoin pairs (USDC/USDT) have very low impermanent loss risk but also low fee earnings. Volatile pairs (ETH/altcoin) have high impermanent loss risk but higher fees if volume is sufficient.
- Correlated asset pairs (e.g. stETH/ETH, USDC/USDT) have minimal impermanent loss as the tokens move together
- Higher trading volume generates more fees to offset impermanent loss
- Concentrated liquidity (Uniswap V3) earns more fees per dollar of capital but requires active management
- Check the historic fee APY vs impermanent loss for a pool on platforms like Uniswap Analytics or DefiLlama before depositing
Strategies to manage impermanent loss
Several strategies exist to reduce impermanent loss exposure while still earning DeFi yield. Choosing the right strategy depends on your token holdings, risk tolerance, and willingness to actively manage positions.
- Stable-stable pools
- Providing liquidity to pools of two stablecoins (USDC/USDT, DAI/USDC) eliminates impermanent loss risk almost entirely since the pegged assets maintain a near-1:1 ratio.
- Correlated asset pools
- Pools of liquid staking tokens with their underlying (stETH/ETH, rETH/ETH) have minimal IL because the assets are economically linked and move together.
- Single-sided staking
- Some protocols (Bancor historically, newer designs) allow single-token deposits that shield against IL, though these designs carry additional smart contract complexity.
- Active range management
- For Uniswap V3, actively adjusting your price range as prices move keeps your position in-range and earning fees while controlling IL exposure.
Frequently asked questions
Is impermanent loss guaranteed when providing liquidity?
Not guaranteed, but likely if the prices of your deposited tokens change. The only scenario with zero impermanent loss is when the token price ratio at withdrawal is identical to the ratio at deposit. This is common with stablecoin pairs (USDC/USDT) but rare with volatile assets like ETH paired with altcoins.
What is the difference between impermanent and permanent loss?
Impermanent loss only becomes permanent at withdrawal. If prices return to the original ratio, the loss disappears — hence 'impermanent'. Once you withdraw your liquidity at a divergent price, the loss is realised and cannot be recovered through the AMM position. Re-entering the same pool at the new ratio starts a new IL calculation from scratch.
Can impermanent loss wipe out my entire investment?
Complete loss is extremely unlikely through impermanent loss alone — even at a 10× price move, IL is ~42.5% rather than 100%. However, if one token in the pair collapses to near zero (a rug pull or token failure), your pool position will end up almost entirely in the worthless token. IL does not protect against one-sided token failures.
Do liquidity mining rewards offset impermanent loss?
They can. Many protocols incentivise liquidity providers with additional governance token rewards (often called 'liquidity mining') on top of trading fees. These rewards can make LPing profitable even with significant impermanent loss. However, governance token rewards carry their own price risk — they often decline in value, eroding the apparent yield.
Which platforms show me my real-time impermanent loss?
DefiLlama's liquidity tool, Uniswap Analytics (info.uniswap.org), APY.vision, and DeBank all show real-time P&L for LP positions including impermanent loss vs holding. These tools connect to your wallet address (read-only) and calculate your actual IL based on entry price versus current price.