Billing Billing for Administrators Current: Billing Concepts PDF Download PDF Download page Billing Concepts. Current page Include child pages All pages Billing Concepts The process of Billing embodies various sub-processes that drive the entire system.As an administrator, you should know the key concepts that run behind the scenes and define the system's behavior. They are:Billing SchedulesProrationUsage BillingRelated A/R TransactionsBilling PreferencesCredit MemoPayment Terms ×