In a significant development, Hyperliquid has released its fee structure for outcome tokens, paving the way for a potential mainnet launch. The prediction market sector has witnessed a staggering 300% surge in trading volume in 2025, reaching $63.5 billion, and Hyperliquid is strategically positioning itself to compete with established players like Kalshi and Polymarket.
A key aspect of the fee structure is that opening a position is free, with fees only applicable when closing or settling a trade. The structure outlines six distinct scenarios, including minting, trading, burning, and settlement. Additionally, traders utilizing Hyperliquid's aligned quote tokens are eligible for preferential rates, with taker fees reduced by 20% and maker rebates increased by 50% compared to standard rates.
The full fee formula has been made available for developers. The introduction of outcome tokens, as part of the HIP-4 upgrade, will enable users to trade binary contracts on real-world events, alongside perpetuals and spot positions, within a single account, thereby enhancing the platform's competitiveness against rivals like Polymarket.
Following the successful implementation of HIP-3, which opened permissionless perpetuals to developers and now accounts for over 35% of the platform's trading volume since its introduction in October 2025, Hyperliquid is set to further expand its offerings. Currently, outcome tokens are available on testnet only, with no confirmed mainnet launch date.