The article explores motivational resources behind the success of project teams. To determine the motivational resources, we develop a comprehensive model of project activity based on the approach proposed by Harvard Business School, according to which we study a subjective assessment of a project’s implementation and its resource potential, the possibilities for realizing motives, satisfaction with intra-group relationships, and job satisfaction. The data were processed with content analysis, comparative and correlation analysis. The study involved 8 project teams, 120 participants aged between 24 and 30. Motivational indicators of the project teams’ success correspond to the high levels of resource assessment and project implementation, assessment of the capability to realize motives in the project, satisfaction indicators (intra-group relationships and job). We revealed an interrelation between the estimate of the capability of motives realization in the project and the estimate of resource potential and project implementation, and the capabilities of employee motives realization in the project. The research results provide a comprehensive overview of the project implementation process, while focusing on the construction of both the motivational system and the communication system within the project.