Yes.  Big River allows you to prompt your donors to pay your transaction fees, or to automatically add them to a transaction.  Here's how:

On the Form Contents tab of the Pages editor, you will see the selector for "Transaction Fee Option":

There are three options:

  • Do not offer or charge fee
  • Prompt to add fee to total
  • Automatically add fee to total

The first option will not put any transaction fee cost on the form.  The second will put a prompt on the form for the donor to opt into paying the transaction fee.

If the donor checks this box, the transaction fee calculated from the subtotal of selected items will appear:

The third option" Automatically add fee to total" does this calculation automatically.