Pay with Credit CardPay with ACH Invoice Number: Invoice Amount: On clicking submit you’ll be redirected to a secure payment page where you will be able to pay your invoice with a Credit Card. Processing Fee of 3.5% will be added at check out to all online payments. Invoice Number: Invoice Amount: On clicking submit you’ll be redirected to a secure payment page where you will be able to pay your invoice with ACH. Processing Fee of 0.5% will be added at check out to all online payments.