Controlling is considered to be one of the key tools that help to make the management of an enterprise more efficient, and thus adjust to continual changes of the economic environment of the present times. By implementing controlling into an enterprise, it becomes its inevitable part which helps coordinate all systems in the enterprise. It is all internal stakeholders who encounter controlling, i.e. the owners, managers, and the employees. However, for controlling to be efficient in an enterprise, it is essential to implement it appropriately, promote and enforce it, and gradually build it up, in order to achieve its most appropriate form. Psychological aspects help to understand how implementation of controlling is perceived by the employees, managers, and the owners. The main objective of this paper is to determine the effect of controlling from the psychological point of view, and from the view of the internal stakeholders. Using the data obtained in a survey, the paper also aims at proposing a model of implementing, enforcing, and using controlling in an enterprise. Within the empirical research, the authors have used a questionnaire as a method of surveying the given problem in the practice of Slovak enterprises. The results of the research enabled identification of the main barriers of implementing, enforcing, and using this tool in enterprises, as perceived by the employees, managers, and the owners. Based on the results, a standardized model of implementing, enforcing, and using controlling in Slovak enterprises has been proposed. This model will help to ensure the acceptance of controlling by all stakeholders, eliminate barriers to its implementation and enforcement in an enterprise, help understand its benefits by internal stakeholders, and enable an effective use and functioning of this tool.