Abstract: A real time monitoring and control system (101) interfaces with service supply entities such as SMSC, MSC, GGSN, SGSN, and IP probe entities. A data manager (104) maintains account resource data associating each of a plurality of accounts with one or more services, in which at least one account is associated with a plurality of services. Each account may have multiple pots, each associated with a type of resource such as bytes, packets, or time. A session manager (102) monitors concurrent service usage in real time and generates messages or control instructions for account modification and for account resource re-allocation across services in real time according to service usage. The session manager (102) dynamically re-distributes available account resources to sessions as the sessions occur, including resource re-allocation during a plurality of sessions including scalar and event-based sessions.