# Apply custom fees to merchants

Software Platforms and Marketplaces now have the ability create custom fees to their sub-merchants. This is helpful if you have a custom charge you want to pass through to your sub-merchants through Finix's settlement engine.

The fee would be paid out as part of your monthly residual after subtracting Finix's costs. To learn how to use this feature, visit our [API reference](/api/fees/createfee).