The development of the state and the expansion of its affairs throughout history led to many institutional and procedural changes. The state is trying to adapt to the new circumstances through various mechanisms and new organizing ideas. Adjustments conditioned by the ever-increasing demands placed on the administration are attempted to be achieved through agencification, i.e., the creation of agencies as a new form of management. Such a new form joins the existing elements of state administration with elements of the economy. Agencies provide solutions to new challenges through the atomization of massive state systems, but they also create new problems. The paper deals with the process of agencification and the agencies themselves, the reasons for their emergence, and the types, characteristics, and consequences of this new phenomenon. The biggest problems of the agency model are presented, but the text will also offer some solutions proposed by renowned experts in the field of administration. Special emphasis is placed on the autonomy and responsibility of agencies and independent bodies, among which central banks stand out as being specific due to their strength. In the example of the European Central Bank, certain elements of agencies are presented, and an additional overview is made in relation to the central bank of the Republic of Croatia. It has been shown that the Croatian National Bank has features that are characteristic of agencies. The purpose of the paper is to give an overview of the specifics of the agency model of organization and to show them through the example of the central bank of the Republic of Croatia.