Uniswap has switched on protocol fees for its v4 pools, and within a day Founder Hayden Adams was fighting a wave of claims that the change quietly cuts into liquidity providers’ pay.
v4 Fees Go Live Across Seven Chains
Uniswap governance executed Proposal 100 on July 27, activating the v4 fee controller across seven chains, including Ethereum, Arbitrum, Base, BNB Chain, and Polygon. The vote drew 46.6 million UNI in favor to 1.27 million against, clearing the 40 million UNI quorum.
The move extends a fee-capture system that has been running on Uniswap v2 and v3 since late December. Rather than setting fees pool by pool, v4 routes them through a central fee controller, with collected assets flowing into the same mechanism that burns UNI. It is the next stage of the “UNIfication” program that finally turned on the protocol’s long-dormant fee switch.
The LP-Cut Claim, and Adams’s Rebuttal
As the fees went live, critics argued that liquidity providers were losing income, that the protocol was skimming 25% of LP profits, and that the cut was simply too steep. On July 28, Adams pushed back on all three.
He said the protocol fee is additive, not subtractive: a liquidity provider earning 30 basis points per swap still earns 30 basis points, while the trader pays a separate 5bp protocol charge on top.
On that basis, the protocol’s 5bp on a 30bp pool is roughly 14% of total swap fees and none of what LPs were already earning, not the 25% some critics claimed. The gap is partly a measurement dispute: Adams is describing the protocol’s share of the rate on the common 30bp tier, while critics citing 20–33% are typically measuring the protocol’s cut as a share of LP fee revenue or looking at lower fee tiers where that ratio runs higher. Both are internally consistent; they measure different things.
Uniswap’s published v4 code supports the distinction. The Pool contract defines the total swap charge as the LP fee plus a separately calculated protocol fee, routing the remaining fee growth to liquidity providers rather than carving the protocol’s share out of the LP rate.
The confusion has a source: in v3, the protocol fee was a direct cut taken out of the LP fee—subtractive. In v4 it is applied sequentially and stacks on top, so the protocol fee hits the input first, and the LP fee applies to the remainder. LPs keep very close to their full stated rate, with only a negligible reduction from the cross-term where the two fees overlap.
The Real Question Is Who Pays
The clarification reframes the debate rather than ending it. Because the fee is additive, the burden falls on traders, the all-in cost on a 30bp pool rises to roughly 34.85 basis points, not on LPs, whose stated rate stays intact.
That shifted the argument to second-order effects, and Curve Founder Michael Egorov made the case directly in reply to Adams: higher total fees can widen spreads, dampen volume, and indirectly erode LP earnings even when the nominal LP rate is unchanged.
Some liquidity providers went further, Guil Lambert among them, arguing the switch “structurally can’t work” for sustained liquidity provision because it leaves Uniswap less competitive than pure LP-fee AMMs or emissions-subsidized forks and could push capital elsewhere. The unresolved questions are whether higher effective spreads cost volume and whether LP returns still clear after impermanent loss once the protocol takes its slice.
The End of UNI’s Value-Capture Problem
The stakes explain the intensity of the reaction. For five years UNI was the emblem of DeFi’s value-capture problem, governing a protocol that processed trillions in volume while routing every basis point of fees to LPs and none to the token, which fell more than 90% from its 2021 peak.
UNIfication changed that. Protocol fees now accumulate on-chain and can only be claimed by burning UNI, tying revenue directly to supply reduction, and Adams has said the system is generating roughly $5.2 million in daily fees. Much of that surge is driven by Robinhood Chain volume, where Uniswap is the primary AMM and equity-linked tokens trade around the clock, a source of revenue that does not depend on a crypto bull market. Adding v4 pools widens that base.
Adams closed with a swipe at rival forks; replies pointed to Aerodrome, which routes 100% of swap fees to itself and compensates LPs with token inflation set by governance votes rather than real revenue.
Also Read: Uniswap Launches Permissioned Pools for Tokenized Assets
