In today's business there is a growing need to take action in order to achieve rapid changes, efficiency and competitiveness of the business system on the market. For efficient business, high quality information management is a necessary precondition. It is essentially set as a starting point for the development of managerial accounting, the main task of which is the preparation of information for the internal reporting on business activities in the business system. Its prognostic dimension should contribute to improvement of the overall quality of work and business system management, while the analytical and free approach to reporting facilitate the implementation of planning, decision-making and monitoring the realization of decisions. The goal of the thesis was to realize the importance of the managerial accounting in small business system, and for this purpose the business system of Elite Travel Ltd. from Dubrovnik was chosen and analysed. Namely, the existing empirical research pointed out the lack of, i.e. the nonexistence of separately developed function of internal accounting reports in small business systems, so the example of the chosen system served to investigate the current situation in the system that belongs to propulsive, tourist activity. Hence, the strategy was to analyse the interrelationship between the accounting and the other departments and functions in the business system, as well as to research the accounting-financial structure and specificity of the management of the accounting department. Using the method of in-depth interview, the chief managers were surveyed as to perceive their opinions on the role and the use of the managerial accounting in the business system. The overall conclusion is that Elite Travel Ltd., as expected, lacks the use of the internal reporting, and that there is no recognition of the possibilities and advantages that could be obtained with the use of the managerial accounting’s internal reporting. The obtained insights were interpreted in correlation with the recognized reasons for absence, i.e. the highlighted advantages and disadvantages of the use of the managerial accounting, as chief managers presented them in the interviews.