Abstract: The present invention provides a method and system for real-time charging including the following capabilities: calculation and storage of real time usage information on a per subscriber or group basis; real-time criteria evaluation of configurable thresholds; real-time threshold notification to the subscriber/account owner; and subscriber/account owner interaction capability to restrict specific calls and events for any member of a group, through external systems, text messaging and interactive voice response (IVR) sessions. When these four major capabilities are combined and configured, a pre-paid functionality in a post pay environment is produced.