Builder Fee
The Aura builder fee has two numbers worth keeping straight:
- The ceiling: 0.1%. If the fee applies to your account, setup includes a one-time wallet signature — submitted to Hyperliquid, not an on-chain transaction, so it costs no gas — that authorizes this as the maximum Aura could ever charge per order. Approving once means the fee applies to future trades without any further signatures. Aura can never charge above this ceiling without you re-approving.
- The actual rate: 0.001% (0.1 basis point) per order. This is what's charged today — far below the ceiling. The approval doesn't expire; the generous ceiling exists so that small per-order rate adjustments stay within it and never force you to re-approve.
Most accounts set up through Aura pay nothing at all — see the zero-fee path below.
Hyperliquid's builder fee system is documented in their docs.
When it applies
For accounts that aren't on the zero-fee path, the fee is charged across all Hyperliquid markets except perps.fun:
- Mainnet perpetual futures on Hyperliquid — yes
- Spot markets — yes
- HIP-3 markets — yes
- perps.fun markets — no, always exempt
- Polymarket — separate system. Polymarket has its own fees and isn't part of the Aura builder fee.
Why it exists
Builder fees are how Aura funds development. Hyperliquid's protocol allows builders to collect a fee from the trades they route — Aura's approval sets a ceiling so you always know the maximum you can be charged.
How to revoke
Go to Hyperliquid.com → Settings → Builders. Find the Aura entry and revoke. The fee stops applying immediately. If you trade on Aura after revoking, you'll be prompted to re-approve.
Zero-fee path
When you enable trading, Aura is set as your Hyperliquid referrer — the same way for both new Aura accounts and your own existing wallet. With Aura as your referrer, the builder fee is waived entirely until $1B lifetime trading volume. The fee only applies if your Hyperliquid account already had a different referrer before joining Aura, or once you cross $1B lifetime volume. See Free Trading.