Interest is automatically accrued (added to the balance of your account) once a month - you do not need to manually add the interest charges. The day of your account's due date is used as the accrual date. For example, if you have an account that is due on 3/29, the interest will be accrued every mo...read more
Undebt.it does not yet support multiple, tiered interest rates. However, it's high on my list of things to do. One thing you can do in the meantime is figure out the weighted interest rate of the tiers and use that as your interest rate. Tiered interest rates are when you have an account with some ...read more