> For the complete documentation index, see [llms.txt](https://docs.unich.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.unich.com/pre-market-otc/platform-fee.md).

# Platform Fee

Costs are calculated per contract

## Fee Calculation Rules

* No listing or delisting fees for unmatched transactions.
* Platform Fee Rate: 2% on the trading volume for both parties involved in the transaction. 
* Cashout Fee Rate: 0.5% on the cashout volume.
* Refund Fee Rate: 0.5% on the refund volume when both parties fail to perform the settlement.

## Calculation Formulas

* Transaction fee for both the buyer and seller for matched orders

                                             *Transaction Fee = 2% × Trading Volume*

* Transaction fee for matched orders with only one party settling

                                             *Transaction Fee = 2% × Trading Volume (Buyer + Seller)*

* For transactions where both the buyer and seller fail to settle (calculated based on collateral assets)

                                             *Refund Collateral Fee = 0.5% × Trading Volume*

* For cashout orders:

                                             *Cashout Fee = 0.5% × Trading Volume*