When you execute a swap or other transaction through 1inch, different types of fees may apply depending on the trading mode you choose.

In the Pro interface, you pay network gas fees directly to the blockchain to process transactions made using the DEX aggregator.

In the Swap interface, you usually do not pay gas fees—they are covered by the resolvers who fill your order, thanks to 1inch’s intent-based and atomic cross-chain execution methods. Swaps involving the Solana network or from native tokens will include gas fees charged to the user. Some very small swaps may be routed via the DEX aggregator; in this case, the user will be charged network gas fees.

When market conditions shift during a transaction and the final execution price is better than the initially quoted price, it results in positive slippage.

This difference creates a swap surplus. The handling of swap surplus is determined at the API-provider level (operated by 1inch Business), which retains the surplus to support service operation and maintenance.

Certain swaps may include infrastructure fees, which are charged when you use the service.

If such fees are charged, they originate from the API provider layer (operated by 1inch Business) and are needed to support the operation of the swap infrastructure. They are applied automatically within the infrastructure and are not charged manually or separately at the user-interface level.

Infrastructure fees are described in our Terms of Use and detailed further in the Infrastructure Fees FAQ on the 1inch Business Portal, if any.