ParaSwap can either be used directly through the website paraswap.io or accessed through a third party integrating with the service (Partner):
When used directly or through ParaSwap.io: there is no extra fee.
When accessing through a Partner: it's up to the Partner to decide if they want to charge a fee on the swaps facilitated. By default, ParaSwap DAO collects 15% of this fee.
Surplus
There's another potential fee to consider, called Surplus.
The decentralized markets are always on the move; sometimes, competing transactions can push the price lower (or higher) after submitting the transaction. ParaSwap implements several mechanisms to hedge for it, such as displaying the "Minimum Received" amount or securing prices for a set amount of time with market makers quoting through AugustusRFQ.
By default, ParaSwap DAO collects the surplus to grow further and perpetuate the protocol.
