The theme of this paper is the management of work performance in the selected company, which has become an indispensable tool for developing and improving the business of the company. The company that I will analyze and research is Croatian Post d. d., in which its employees are extremely important to its business. Croatian Post employees are the ones who contribute to development and business success with their work, knowledge, experience and motivation. For this reason, quality in managing work performance is of particular importance both individually to employees and collectively to the entire enterprise. The company is currently experiencing difficulties in organizing its day-to-day operations, because in the last year there has been a very high fluctuation of workers in such a way that they are difficult to retain and the largest in the delivery section of the division. Croatian Post d.d. falls into the category of large enterprises (more than 10,000 employees), which strives to manage employees as well as possible, and through more frequent monitoring of their work performance and their continuous evaluation, guidance and rewarding, would gain an additional motivated employee and a clearer picture of the employee structure he has in his basis. This would give the management of work performance its purpose and purpose, and the result would be visible very quickly. The theoretical part of the paper was done on the secondary research with the collected professional literature. The empirical part of the paper was made with a questionnaire among the employees of Croatian Post d.d., to identify persistent performance management practices.