Pool fee

A pool fee is the toll a liquidity pool charges for the service of always being ready to trade. Each swap pays a fixed percentage of its input amount, commonly quoted in basis points, and that amount stays in the pool's reserves instead of reaching the trader's output. The fee is the pool's entire revenue model: it is how liquidity providers get paid for the capital and risk they contribute.

For traders, the fee is one of three costs bundled into a real execution price, alongside price impact and any network cost. It applies to every trade regardless of size, so on small swaps in a deep pool the fee is usually the dominant cost, while on large swaps price impact overtakes it.

For providers, the fee rate steers pool economics: set higher, each trade pays more but routing may favor cheaper pools; set lower, the pool competes on price and needs volume to compensate. OneSwap displays each pool's exact fee in the trade catalog and on swap pages, and its swap quotes account for the fee before you commit, so the number you accept already includes it.