Last updated on 7 August 2026
DeFi Liquidity Pools and Impermanent Loss: Why LPs Face Double Tax Risk?
DeFi Liquidity providers can face tax twice, once when entering and once when exiting the pool. That’s because providing and removing liquidity is treated as two separate disposals for tax purposes.
This issue becomes more serious when you consider impermanent loss. You may lose value in your position due to market shifts, but you can’t deduct that loss until it becomes real. This creates a tricky situation where LPs pay tax even when they’ve lost money.
What is a DeFi Liquidity Pool?
A decentralised finance (DeFi) liquidity pool is a type of smart contract that locks in crypto assets to enable seamless token swaps, without relying on the traditional buyer-seller matching system of an order book.
When you join as a liquidity provider (LP), you contribute a pair (or more) of digital tokens… say ETH and USDC, into the pool. In exchange, you’re issued LP tokens, which act as a receipt for your portion of the pool and entitle you to a share of the fees and assets it generates.
According to CoinMarketCap, an LP token (short for Liquidity Provider token) is a crypto token you receive when you provide liquidity to a DeFi liquidity pool.
For example:
- You add 1 ETH and 3,000 USDC to a Uniswap v3 pool.
- You get LP tokens back. These LP tokens give you a cut of trading fees.
Sounds great, right? But it’s not that simple when it comes to tax.
Joining and Exiting LPs = Taxable Events
When you add assets to a pool, it’s treated as a disposal of your original crypto.
When you remove your assets, it’s also treated as another disposal.
Here’s why:
- You’re not holding ETH or USDC anymore.
- Instead, you get a new token (LP token).
- From a tax perspective, this is like swapping one asset for another.
- That swap triggers Capital Gains Tax (CGT).
Let’s look at a simple example:
- You bought 1 ETH for £1,500.
- You added it to a pool when ETH was worth £2,000.
- You gave up your ETH and received an LP token.
- You’re now liable to pay CGT on the £500 gain, even though you didn’t “cash out.”
Same thing happens when you exit the pool.
- You give back your LP tokens.
- You receive ETH and USDC.
- These are new assets, possibly at new prices.
- Any change in value triggers another tax calculation.
A Crypto Tax Accountant will treat both actions as disposals and report the gains accordingly.
What is Impermanent Loss?
Impermanent loss happens when the value of your pooled assets changes compared to simply holding them.
Let’s say:
- You add 1 ETH and 3,000 USDC to a pool.
- ETH’s price doubles.
- Traders swap your ETH for USDC in the pool.
- You now hold more USDC and less ETH.
When you withdraw, your ETH amount is lower than before. You lost potential gains. That’s impermanent loss.
It becomes permanent only when you withdraw from the pool. Until then, you can’t claim it as a loss, even if the market moved against you.
So you might pay CGT when entering the pool, even though your actual value decreases over time.
That’s the double tax risk.
Why Can’t You Deduct Impermanent Loss Immediately?
Because impermanent loss isn’t “realised” yet.
For tax purposes, a loss is only counted when:
- You sell the asset
- Or swap it for something else
- Or otherwise dispose of it
While your portfolio value may go down in the pool, you still hold LP tokens. Those are different assets.
When you finally withdraw from the pool, that’s when the impermanent loss becomes permanent. Only then can you report a real loss.
But here’s the problem:
You already paid tax when you added liquidity.
And now you realise a lower value when you exit.
That’s how LPs face tax twice.
A skilled Crypto Tax Accountant knows how to document this clearly to help you minimise tax where legally possible.
Uniswap v3, Curve, and Balancer: Special Considerations
Each of these platforms has its own way of issuing LP tokens, and this affects how tax is calculated.
Uniswap v3
- It uses a concentrated liquidity model, which means your funds are only active within a defined price range, maximising capital efficiency by allocating liquidity where it’s most likely to be used, rather than across the entire market spectrum.
- LP tokens reflect a non-fungible position (similar to an NFT).
- Every time your position is adjusted or rebalanced, it may count as a disposal.
- More tax events = more reporting.
Curve
- Pools are often stablecoin-based (e.g., USDC/DAI/USDT).
- There’s generally a reduced risk of impermanent loss, but this often comes with the trade-off of earning lower returns compared to more volatile or wide-range liquidity strategies.
- LP tokens are fungible ERC-20 tokens.
- Adding/removing liquidity still counts as a disposal.
Balancer
- Supports multi-token pools (e.g., 80% ETH, 20% BAL).
- When ratios shift, your share of each token changes.
- That creates more complex disposal calculations.
All three platforms require detailed tracking of every transaction. If you make 20 liquidity moves in a year, that could be 40 taxable events. And that’s not even counting other DeFi tools you might use, wrapped tokens like wBTC and stETH can also trigger Capital Gains Tax, even though they appear to be simple swaps.
This is where a Crypto Tax Accountant is essential. Manual tracking isn’t enough anymore.
Real Example
Let’s say:
- You enter a Uniswap v3 ETH/USDC pool in January 2025.
- ETH price is £2,000. You add 1 ETH and 2,000 USDC.
- You get LP tokens worth £4,000.
- ETH rises to £3,000 by June 2025. You exit the pool.
- You receive 0.7 ETH and 2,900 USDC. Total value = £5,000.
What’s the tax situation?
- You report CGT in January when you entered (ETH value: £2,000).
- In June, you report again on your LP token disposal.
- Even though you received fewer ETH tokens back, the rise in price and swap fees make up the difference.
- But if ETH had crashed instead, you’d still pay tax on the entry gain, while exiting at a loss.
That’s the double risk.
Why You Need a Crypto Tax Accountant?
Crypto tax is complex. DeFi makes it harder. You need to:
- Track every transaction
- Know when disposals happen
- Record token prices at the time of the event
- Identify impermanent loss correctly
A Crypto Tax Accountant can:
- Prepare accurate CGT reports
- Avoid overpaying tax
- Keep your records HMRC-ready
- Help you understand what you actually owe
Don’t guess. And don’t rely on exchange CSVs alone. Get expert help because the cost of skipping a Crypto Tax Accountant in 2025 is high.
Final Thoughts
If you’re providing liquidity in DeFi, you’re likely exposed to tax twice, on the way in and on the way out. Impermanent loss makes it even more painful because you can’t claim it right away.
Whether you use Uniswap v3, Curve, or Balancer, these rules apply. Get your records in order. Work with a Crypto Tax Accountant who understands LP tokens, impermanent loss, and DeFi taxation. You might also explore tax-efficient crypto strategies for UK residents to reduce your future liabilities legally.
Need help with crypto tax and reporting? Talk to a Crypto Tax Accountant now.
We handle DeFi, LP tokens, and complex tax cases, so you don’t have to.
FAQs
Are LP tokens taxable?
Yes. Receiving LP tokens in exchange for your crypto counts as a disposal. It’s taxable under UK Capital Gains Tax rules.
Can I deduct impermanent loss from my tax?
Only when it’s realised, usually when you withdraw from the liquidity pool. Until then, it’s not deductible.
Do I have to report every liquidity transaction?
Yes. Every time you add or remove liquidity, it may count as a taxable event. A Crypto Tax Accountant can help simplify this.
How is Uniswap v3 different in tax terms?
Because it uses NFT-style LP positions, each change in your price range or liquidity may trigger a new tax event. This requires more detailed tracking.
