Abstract: This invention relates generally to a system and method to provide mobile subscription service management for medium and large corporations, allowing continuing backend total cost optimization. It determines a minutes pool collectively shared by a group of users, with an equitable cost allocation scheme which assures individual cost saving relative to the least cost stand-alone plan. The system provides real-time active mobile devices usage alert management, expense monitoring, report generation, individual internal cost center based billing and hierarchical data access through a web-based portal. The system is built on a Uniform Database, pulling information from Monthly Statements, Call Detail Records (CDRs), invoices, plan features and data usage summaries across diverse vendor platforms.