The final work focuses on the creation of an information system project plan for a complex business system using MS Project software. The purpose of the work is to analyze the importance of efficient project management in the context of information systems and to study the specifics of complex business systems. Various methods and analysis describe in detail the steps in the process of creating a project plan, emphasizing key elements such as defining objectives, identifying resources, establishing timelines and estimating costs. Special emphasis is placed on the application of MS Project software as a tool for planning, monitoring and controlling projects. It is shown that the mentioned tool facilitates the creation and monitoring of the progress of the project. In the practical part of the research, concrete situations in which MS Project was actually applied in similar projects are analyzed. Through research, the paper concludes the importance of quality project planning and monitoring for achieving successful results in the creation of information systems in complex business environments. According to everything, it is evident that the use of MS Project is essential for achieving high efficiency in the management of information systems projects, and it is concluded that this approach is of key importance for success in modern business.