This paper analyzed the process of joining the Organization for Economic Co-operation and Development (OECD) and the benefits that a country can have from joining it. Since the Republic of Croatia is one of the candidate countries for accession to the OECD, the goal of this paper was to present and provide a better understanding of all aspects that need to be achieved in order for the country to be suitable for accession. Membership in this organization brings numerous advantages, but there are also certain obligations that need to be understood before joining, some of which are: taking into account that economic strength and prosperity are key to achieving the goals of the United Nations, preserving individual freedom and increasing general well-being, the belief that these goals can be achieved most effectively by strengthening the tradition of cooperation that has developed between them, the recognition that the economic recovery and progress of Europe have opened up new perspectives for strengthening this tradition and its application to new tasks and broader goals, recognition of the increasing interdependence of their economies, and the like. An analysis of economic indicators was also made, from which it follows that Croatia has a lower GDP, GDP per capita and a higher inflation rate compared to the average of OECD member countries, it was also found that Croatia has a higher share of imports and exports, which shows its openness to the international market . Therefore, it can be concluded that in the context of economic indicators, Croatia should focus on stimulating economic growth, solving trade imbalances, and managing inflation and unemployment.