Abstract: A system and method for a web-based, convergent communications billing solution for large-scale customers/users is disclosed. The environment in which the present invention is used encompasses the general Internet environment, with connections to Banks and other similar payment mechanisms, connections to multiple carriers/users to obtain legacy files and to provide results and analysis capabilities to these same carriers/users, and encompasses modem computing and server technology to process the data, create the integrated bills, process payments and adjustments and provide the required reports to the customers and multiple carriers participating.