> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mountmonitor.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Set up payment processing fees

> Choose the fee settings used for payments and understand how they appear on a job.

<Note>
  This guide is being written. The topics below show what it will cover.
</Note>

## Planned topics

* Create or edit fee names and calculation settings in invoice settings.
* Assign fees to supported card-reader and online-payment scenarios.
* Review the fee shown before collecting a payment and how the fee is added to the job/invoice.
* Explain that changes to configured fees affect future payments while existing payment fee details remain recorded.
* Connect refund behaviour to the related processing-fee line.

## Related guides

* [Payments](/payments/overview)
* [Take a card payment on a reader](/payments/take-a-card-payment)
* [Refund a payment](/payments/refund-a-payment)
* [Customize invoices](/invoices/customize-invoices)