Yes. Principal-only payments must be made on the same day that your regular monthly payment is due.  You must satisfy the total amount of the monthly payment; any additional amount paid on the same day will go to principal. If the payment is made through Online Access, the payment is immediate and the chance of interest accruing while the payment is being transferred is eliminated. You may also make principal-only payments by calling our Member Service Center at 1-800-538-3328 or by visiting one of our branch locations