Deposit USDC through the Arbitrum bridge. If your funds are on another chain, either move them to Arbitrum first or use an integrated cross-chain route.
From Arbitrum
The only cost is Arbitrum gas. Hyperliquid charges nothing to deposit.
From another chain
Hyperliquid’s deposit interface routes from a range of networks — Ethereum, Solana, Base and others — through integrated bridging. You pay the source chain’s gas plus the bridge fee.
If you already hold funds on a low-fee chain, bridging to Arbitrum yourself and depositing from there is often cheaper than the integrated route. Compare before committing a large amount.
Mistakes that cost money
Sending a token other than USDC. Sending on the wrong network. Sending to the bridge contract from an exchange withdrawal rather than a wallet you control. Each of these can be unrecoverable.
Test with a small amount first.
Getting funds out
Withdrawals return USDC to Arbitrum for a flat 1 USDC fee and settle in minutes.