Log in to your account online to make a payment, check your loan balance and more. Our Loan Servicing team is always happy to assist you.Just select "transfers and payments," click "pay a loan," and complete your payment! How to transfer funds. OneMain wants to make your loan process as easy as possible. Loan payment information. Log into Account Center. Loan payments can be made using a debit card bearing a Visa® or MasterCard® logo or via eCheck – ACH payments made from a checking or savings account. Please contact us using the details below. If you are an existing customer and have a loan with Medallion Bank, please use the borrower login above.