A system and method for on-line management of account information by customers of a provider of goods or services. A web server receives billing information from a telecommunications service provider in a standardized XML-format readily suitable for viewing by the customers. The system further includes a tiered storage system for maintaining invoices of the customers. Recent invoices are maintained in an upper tier of the storage system where they are accessible to customers over the Internet. As the invoices age, an archival and retrieval application periodically transfers the invoices to an intermediate tier where they may only be accessed by the archival and retrieval application using an index maintained in the upper tier. Account receivable information is also available on-line through the web site. The available account receivable information is continuously synchronized with corresponding information maintained by the service provider using a synchronization application which minimizes traffic therebetween.