Interest on open debit items is calculated for the period from the due date to the interest calculation date (this is usually the current date).
Interest on cleared debit items is calculated for the period from the due date to the date of clearing, provided the clearing falls before the interest calculation date. If an item is not cleared by a payment (for example, a reversal), no interest calculation is to take place.
Interest on debit items can be posted as a statistical or real item.
Interest on credit items always have to be posted as a real item.
Interest is not calculated for allocated incoming payments.
Interest simulation means that interest is calculated for information only and not posted.