"To pay the balance" means settling the remaining amount of money or debt that is owed in order to clear the account or complete a transaction. Full definition
Only use this option if you are certain you will have the funds to full pay the balance in 60 days, or in the event of an emergency. (thecollegeinvestor.com)
They will charge you with the rate on your balance from the date of each purchase if you don't pay the balance in full. (debtfirms.com)
If you decide to continue with more than one lesson, you can upgrade to a larger package by paying the balance of the larger package. (westwooddriving.com)