M.Ing. (Engineering Management) / Revenue Assurance is an emerging discipline in the Communication Service Provider (CSP) industry. It is a fast changing and maturing field driven by proactive CSPs and industry providers of Revenue Assurance technology and services. Two practice guideline bodies, the TeleManagement Forum and the Global Revenue Assurance Professions Association (GRAPA), have issued various practice guidelines, maturity assessment models, and the first attempts to certify practitioners in this discipline. The discipline, however, lacks a working set of definitions. Industry writing is of commercial value with little contribution from an academic perspective. This study provides a provisional taxonomy as basis for introducing a working' set of definitions to support academic enquiry into the discipline of Revenue Assurance. The study employed Grounded Theory and document analysis techniques to code and analyse data available in the public domain. The result is a set of grounded concepts, re-conceptualised into a taxonomy, which provides structure to academia as primary users. It is hoped that the proposed taxonomy will provide a common base of understanding, which will guide future dialogue and expansion of the field, with contributions from both industry and academia.