Purpose: The ability of an enterprise to execute projects, using the tools appropriate to do so, is called project maturity. On the other hand, at a higher level of detail, it is seen as the appropriate selection of a portfolio of projects, in such a way that the implementation of given projects is directed to support the goals and strategies of the enterprise, as well as the ability to apply appropriate project management tools and techniques. Accelerating changes in the company's environment, cause them to be forced to implement project management, in order to increase flexibility and standardization, so that activities become more professional. In sum, this translates into better financial health of the enterprise, a better position among competitors and, what is related to this, gaining new markets for their products and services. Project maturity models provide a starting point for conducting an analysis of the current state of the enterprise and indicate the direction or directions in which the enterprise should develop. The purpose of this article is to present the results of a usability analysis of project maturity models for an IT enterprise. The following models are presented in it: PMMM (The Kerzner Project Management Maturity Model) - developed by H. Kerzner; P3M3 (Portfolio, Program and Project Management Maturity Model) - developed by the Office of Government Commerce; OPM3 (Organizational Project Management Maturity Model) - developed by the Project Management Institute; P2MM (PRINCE2 Maturity Model) - developed by the Office of Government Commerce. The essence of project maturity, the project approach and its operation and improvement in management systems is also discussed. Design/methodology/approach: The article is exploratory in nature, and the primary research was conducted using the expert interview method. Research limitations/implications: Future research should focus on further analysis of both design and process maturity models. Practical implications: The research discussed in this article can contribute to further empirical research, including, among other things, the initiation of work on the development of a project maturity model aimed at the IT industry. Social implications: The practical implications of the research involve the possibility of using IT to improve existing maturity models and practical implementation in IT companies. Originality/value: The main value of the article is the analysis of models past IT practitioners, and the overview presented is based on existing and used maturity models. Keywords: project management, project maturity, project maturity models, enterprise maturity. Category of the paper: General review, Research paper.