Pay Full Amount
If your payment amount due changes each month and your management company offers the ability to view your balance, you may select the "Pay Full Amount" option, which will set your auto payment to pay each month's balance. With this option, you will be given the option to enter a maximum limit, which means you should enter the highest amount possible that you want taken out each payment. However, it is not necessary to set a maximum payment limit.
Pay Fixed Amount
If your payment amount due stays the same each month, or your management company does not offer the "Pay Full Amount" option you can choose the "Pay Fixed Amount" option, and your auto payments will pull the same amount each month from your account.