The gap between the IT organization and the business presents a major challenge for companies. Causes and ways of bridging the gap are uncertain as there has been a lack of research in this area. In this research project, we follow a relationship management (RM) initiative in a large financial services institution, the purpose of which was to improve the business/IT relationship. The outcome was the development of the Relationship Management Maturity Model (RMMM), a tool to define RM best practices and to enable the company to bridge the gap. This work presents the RMMM – the first model for integrating and improving the business/IT relationship.