A control point administers an Advice of Charge (AoC) service provided to mobile subscribers. The control point is informed of each can involving a mobile station that subscribes to the Advice of Charge service. The control point determines one or more AoC parameters for the call and sends them to a switching node currently serving the mobile station. The mobile station receives the AoC parameters from the serving switching node and determines a prospective cost associated with the call and displays that cost to the mobile subscriber. Accumulated costs for that call may also be determined and displayed during the call.