When clients pay your invoices online via credit card or ACH using BQE ePayments, a processing (merchant) fee is charged on each transaction. This is the standard fee charged by payment processors. You can choose to pass this processing fee to your clients by enabling this option in the Settings > ePayments screen in CORE. When you enable the processing fee, CORE automatically populates the actual processing fee percentage in case of credit cards and the processing fee amount in case of ACH. Check CORE Help Center for details.