No, you must pay your total due in full each month or you will be unable to utilize Sunbound to pay your rent in the following month. Sunbound cannot cover your rent in a new month if you have a past due rent amount from a previous month.
If your rent portal has an overdue balance from a previous month(s), Sunbound will be unable to cover the new month's rent unless your past due balance is paid by the 3rd of the month.