What the 0.1% builder fee is

Where the fee lives

Hyperliquid supports builder fees natively: an interface or system that routes an order can attach a fee, and the user approves a maximum rate for that builder in advance. The approval is a permission with a ceiling, not an open-ended charge, and it is visible on-chain.

Because it settles inside the trade, there is no invoice, no separate withdrawal and no wallet that has to hold your money in order to bill you. That is a direct consequence of the non-custodial architecture rather than a policy choice.

Comparing the three models

Each revenue model creates a distinct incentive. Understanding the incentive is more useful than comparing headline percentages.

• Volume fee: aligned with executing the strategy, but rewards turnover — which is why replacement policy is deliberately patient on variance.
• Profit share: aligned with gains, but creates option-like incentives to take more risk with your capital, since the downside is yours alone.
• Subscription: predictable, but paid whether or not the system trades, and unrelated to whether it works.

What the fee does not touch

The fee applies to mirrored volume. It does not apply to your balance, to deposits, to unrealised PnL or to positions you open yourself. Hyperliquid's own exchange fees and funding payments are separate and go to the exchange and the market, not to HyperMirror.

Because the platform never holds funds, it cannot deduct anything from your account outside this mechanism, and the approval can be revoked on-chain at any time.

Cost in context

Fees are the one part of trading you can predict with certainty. They should be weighed against the fact that returns cannot be predicted at all.

Past performance is not indicative of future results. Perpetual futures are leveraged instruments and carry a substantial risk of loss, including the loss of your entire position.