In this study, public policies, legal obligations and regulations, and monetary and fiscal policies implemented byCroatia, the newest member state of the EU, and Turkey, which is negotiating its accession to the EU as a memberstate, during the EU membership process were analyzed comparatively. First, In the study, information was firstprovided on the harmonization processes and policies necessary for full membership to the European Union and theUnion. In this regard, a focus was placed on the goals of the Union and how it can contribute to the world in the future.Afterward, the differences between Croatia and Turkey during the negotiation process were tried to be demonstrated.We believe that demonstrating the differences between the negotiation processes of the two countries will be importantfor Turkey to follow a more effective path in its process of full membership to the Union.