National Identity projects and providing such identification to citizens in various countries around the globe has captured attention of late. Although the perceived benefits are numerous, nonetheless the challenges and bottlenecks for a successful rollout are many. The objective of this paper is to put forward the drivers and inhibitors for adopting a common identity management system across various organizations and to suggest a model for determining the feasibility and sustainability of such a system. The paper develops on TAM for proposing a model for identifying the drivers and inhibitors of managing such an identity management exercise. This paper highlights various factors affecting successful implementation of an identity management system and investigates the impact of these factors. The model suggested in this paper would allow organizations and policy makers to determine the critical factors for the implementation of an identity management system in large scale.