A method and system for computing a cost estimate for a company that may be the client of a supplier providing information system equipment and consulting. An estimate is calculated according to a model with input characterizing circumstances of the client. The program collects client profile information and costs that the client knows. Other costs that the client does not know are read from a local database storing costs known by other clients with similar profiles. A remote database accessible by any client is updated by cost estimate information at each new cost estimate execution by a client.