Wing imposes a Credit/Debit Card Payment Processing Fee, which is $35 USD per client per month. For clients who use ACH and comparable bank transfer options, this processing fee is waived. Wing levies this processing fee to offset our average cost of clients using a Credit or Debit card to pay for services. As our chargeable amounts are quite large, we must do this in order to continue providing high quality services at the price point that we offer.