Uniswap's v4 Fee Math Has Two Versions, And They Don't Add Up The Same Way 🧮

Uniswap founder Hayden Adams publicly defended the protocol's newly activated v4 fees on Tuesday, rejecting claims that the change reduces what liquidity providers earn per swap. The pushback arrived days after Uniswap governance approved the activation of protocol fees across selected v4 pools on multiple blockchains.

Adams centered his argument on a 30-basis-point pool, stating in an X post that "Tons of FUD and misunderstanding around the v4 fee switch." On that pool, he said, a 5-basis-point protocol fee represents roughly 14% of total swap fees, not a reduction in LP allocations, because protocol fees are additive to, rather than deducted from, LP compensation. "Protocol fees are additive, not subtractive. LPs earning 30bp per swap still earn 30bp," Adams wrote. He also dismissed the claim that the protocol is taking 25% of LP profits as "made-up math."

The dispute centers on a structural difference in how the fee stack is described. Critics, along with portions of the DeFi governance community, have pointed to Uniswap's own v4 documentation, which states that protocol and LP fees are applied sequentially, with the protocol fee taken first and the LP fee calculated on the remaining input. Under that sequence, any positive protocol fee narrows the base on which LP fees are calculated even when swap volume remains constant.

Adams' "additive" characterization and the sequential-application mechanics laid out in the protocol documentation describe different claims about how the fee stack operates in practice. The central question raised by the dispute is not whether protocol fees exist, but whether their structural effect on LP returns is material or negligible, and how the two framings can be reconciled. Available sourcing does not include further technical detail from Adams' X post explaining that reconciliation, and Adams did not provide a follow-up statement addressing the documentation directly.

The disagreement comes as Uniswap moves forward with the first wave of protocol fee activations on v4, with additional pools and chains expected to follow under the governance-approved framework.