Why investing in liquidity pools is often loss-making

Last updated: March 2026 · Reading time: 7 minutes

Liquidity pools are often sold in crypto as a form of "passive income". You deposit two tokens into a pool, earn trading fees, and see an attractive APR percentage on dashboards. It almost sounds like investing with a return on top of your normal position.

For many retail investors, it turns out differently in practice. Not because liquidity pools are inherently bad, but because the actual return is often eaten away by impermanent loss, on-chain costs, repositioning, and tax complexity. What looks like a fee strategy on paper often ends up as a worse result than simply holding the tokens separately.

In this article we explain why "investing" in liquidity pools is often loss-making, when that effect is strongest, and why your net result almost always comes out lower than the headline APR suggests.

The short version

• You do not simply earn a return; you actively take on price and rebalancing risk
• Impermanent loss means you end up holding less of the rising token and more of the falling token
• Fees do not always compensate for that loss, certainly not in crowded or volatile pools
• Uniswap V3 and similar models require active management; outside the range you earn nothing
• Gas, bridging, and claim costs eat up a large part of small or medium-sized positions
• For tax and administration, LP positions are more complex than ordinary spot holdings

1. A liquidity pool is not a savings account

The first misconception is that many investors approach LPs as if they are stablecoin lending or staking: you "lock something up" and get fees in return. But a liquidity pool works fundamentally differently.

When you put ETH and USDC into a pool, for example, you are not simply placing capital into custody. You let an AMM (automated market maker) continuously rebalance your position as other traders use the pool. As a result, you systematically sell part of the rising token and systematically buy part of the falling token.

That means your return depends not only on fees, but also on:

• how strongly the two tokens diverge
• how much volume actually flows through the pool
• how many other LPs are targeting the same fees
• how often you have to adjust or exit yourself

2. Impermanent loss is not a detail, but the core of the problem

Impermanent loss is often explained as a technical side effect. In reality, for many LP positions it is the main reason why the net result disappoints.

Suppose you put ETH and USDC into a 50/50 pool. If ETH rises sharply, the pool will automatically "sell" part of your ETH for USDC to maintain the ratio. So when you exit later, you have:

• less ETH than if you had simply held
• more USDC, but often not enough to compensate for the missed ETH return

That is precisely why LPs are so treacherous for retail investors. You may win fees, but you lose exposure to the strongest performer. In a market where big moves make the difference, that is not a minor drawback but a structural drag on your return.

3. "But I do get fees, right?" Only if they are high enough

The classic objection is fair: liquidity providers receive fees from traders. But the relevant question is not whether you get fees, but whether those fees are large enough to bridge all the other losses.

In practice that often does not work out, especially when:

• the pool faces a lot of competition from other LPs
• volume temporarily collapses
• the price of one of the two tokens moves sharply
• you work with a relatively small position and fixed costs weigh relatively heavily

Dashboards often show an APR based on recent fee income, but that says nothing about future volatility, out-of-range risk, or your real exit position. A pool with "nice fees" can still perform worse than simply holding the two tokens.

4. Uniswap V3 has not made it easier for retail

With concentrated liquidity, such as on Uniswap, the problem becomes even sharper. There you choose a price range in which your liquidity is active. That potentially increases your fee income, but only as long as the market price stays within that range.

As soon as the price moves out of it:

• you no longer earn fees
• you are fully in one of the two assets
• you have to actively reposition if you want to earn a return again

For professional market makers that can make sense. For retail investors it quickly becomes semi-active trading behavior with extra gas fees, extra decisions, and extra opportunities to rebalance at the wrong moment.

5. The hidden costs: gas, bridging, and rebalancing

Even when a pool looks profitable on paper, many investors underestimate the friction costs:

• gas fees to add and remove liquidity
• claim costs for fees or incentives
• bridging fees when you switch chains for a better pool
• extra transactions to shift ranges or rebuild exposure

For smaller positions, those costs are often fatal to the net result. But even for larger positions they systematically eat into your performance. What remains is rarely the headline APR with which the position was opened.

6. Your tax result often feels even worse than your economic result

For Belgian investors, there is an extra layer on top: liquidity pools are not only economically complex, but also administratively annoying.

As we also explain in our knowledge guide on liquidity pool taxation, you have to account for several moments:

• the deposit into the pool and receipt of LP tokens
• the accrual or claim of fees
• the withdrawal and realization of impermanent loss
• any incentive tokens on top of the fees

Even if you are economically "roughly break-even", your tax and administrative reality can feel much more chaotic than with ordinary spot holdings. You have to prove more valuations, reconstruct more transactions, and document more carefully what the principal, fee income, and final result exactly were.

7. Why LPs are often worse than simply holding

For many retail users, the real benchmark is not "did I receive positive fees?", but:

Did I do better with this LP strategy than if I had simply held ETH and USDC separately?

In many cases the answer is no, for three reasons at once:

1. you sell your winner too early because of the AMM rebalancing
2. your fees are not high enough to compensate for that
3. you pay extra costs to open, manage, and close the strategy

That is exactly why LP yield often feels, in hindsight, like "working hard for a worse result". It is not that there was no return, but that the overall structure turned out less favorable than simply doing nothing.

8. When liquidity pools can make sense

That nuance is important: liquidity pools are not automatically bad. They can make sense when:

• you deliberately want market-neutral or range-neutral exposure
• you use a stablecoin-stablecoin pool with lower price divergence
• the fee income and incentives are exceptionally high relative to the risk
• you actively monitor the position and understand what you are doing

But that is a different mindset from "I want my tokens to passively generate a return". For retail users who mainly seek higher returns without active management, LPs are often the wrong product choice.

9. Practical checklist before you open an LP

Before you add liquidity, ask yourself at least these questions:

1. What is my benchmark: earning fees or simply holding the tokens?
2. How volatile is the token pair?
3. How much gas and any bridge costs do I pay to enter and exit?
4. Do I have to actively monitor this position or adjust ranges?
5. Can I afterwards still show exactly what my deposit, fees, and withdrawal were worth?

If you do not have a clear answer to several of those questions, that is usually already a signal that the position is less "passive" than it seems.

10. What does this mean for your Belgian tax return?

The most important thing is not to treat your LP positions as a simple fee machine. For a correct reconstruction you need a clear trail of:

• the original tokens you contributed
• the LP tokens received
• the fees and incentives that accrued or were claimed
• the final tokens you get back on exit

Cryptotax automatically recognizes those transactions for supported protocols such as Uniswap and helps you see the difference between economic return and paper APR. You can read more about evidence and documentation in our guide on supporting documents for your crypto tax return.

Conclusion

For many retail investors, liquidity pools are not a form of passive investing, but a complex trading structure disguised as yield. Once you honestly factor in impermanent loss, costs, and administration, the net result often turns out weaker than simply holding the underlying tokens.

That does not mean LPs never work. It does mean you have to judge them on net result after fees, after rebalancing, and after friction, not on the protocol's APR banner.

Want to know what your liquidity pool positions really earned you? Start for free with Cryptotax and have your LP transactions, fees, and impermanent loss automatically reconstructed into a Belgian report.

Disclaimer: this article is purely informative and not individual tax advice. For concrete cases or borderline situations, we recommend consulting a Belgian tax specialist.