> For the complete documentation index, see [llms.txt](https://docs.bean.exchange/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bean.exchange/trading-perp/fees/dynamic-fee.md).

# Dynamic Fee

* **Network Fee (Execution Cost)**:
  * Covers keeper transaction costs
  * Displayed as "Max Network Fee" (overestimated)
  * Excess refunded after execution
  * Overestimation buffer configurable in Settings
* **Two-Transaction Model**:
  * User sends request transaction
  * Keeper executes order on-chain
* **Fee Components**:
  * Gas price fluctuation buffer
  * Keeper service costs
  * Network congestion adjustments
* **Cost Optimization**: Use Express/One-Click mode for better RPC infrastructure