The traditional Total Cost of Ownership (TCO) calculation model is no longer effective due to the impact of Bring Your Own Device (BYOD) and self-service innovations on IT asset management costs. The five phases of the TCO lifecycle - Plan, Procure, Deploy, Maintain, and Retire - need to be reassessed with a BYOD perspective, taking into account the elimination of planning and procurement costs, automation of deployment, maintenance, and retirement processes, and the shift in employee ownership of devices. With advanced MDM tools, IT can achieve significant cost savings while maintaining high-quality support services for end-users and ensuring security and quality of asset data. The best MDM tool investments can be cash flow neutral, offering a balance between cost savings and service quality improvements.