Presents a Capability Maturity Model (CMM) for assessing the maturity of Corporate Performance Management (CPM) within an organization. The CPM maturity development process was studied in five case companies where the author participated into CPM projects in a various consultation roles. Through a literature study and the development process in each company, the author has made observations, and has identified the key components, factors, and levels of a CPM maturity. The findings of this study further extend the CPM research providing a deeper understanding of the process, components, and levels of CPM maturity. The conference paper also provides organizations with an understanding about CPM and its potential value. The model provides a quick way for organizations to gauge where their CPM initiative is now and where it needs to go next.