Принципи права Європейського Союзу як критерії оцінки ефективності правової інтеграції

The article is devoted to the study of the principles of European Union law as criteria for assessing the effectiveness of Ukraine’s legal integration. In connection with the intensification of the state’s European integration course, the issue of harmonizing national legislation with the legal standards of the European Union is becoming particularly relevant. In particular, the study focuses on such fundamental principles as the rule of law, legal certainty, proportionality, subsidiarity, legality, solidarity, direct effect and mutual recognition. It is determined that the principles allow assessing the compliance of Ukrainian legislation with EU standards, identifying inconsistencies and proposing mechanisms for their elimination. It is emphasized that these principles are not only normative guidelines, but also practical tools for assessing the compliance of Ukrainian legislation with European standards. The rule of law ensures the priority of European norms over national legislation in the event of a conflict, and the principle of legal certainty guarantees the stability and predictability of legal norms. The principle of proportionality helps to avoid excessive state interference in citizens’ rights, and the principle of subsidiarity balances the distribution of powers between the European Union and the Member States. The principle of direct action promotes the implementation of European Union norms directly in the national legal order, and mutual recognition of decisions and legal acts ensures effective cooperation between legal systems. A comprehensive methodological approach to integration is proposed, which includes a systematic assessment of legal adaptation, institutional readiness and citizen awareness, as well as the use of legal categories (legal culture, security, equality). Practical recommendations are outlined, such as the creation of expert commissions, the use of digital technologies for the analysis of legislation and the development of an adaptation roadmap. It is proven that the application of these principles will contribute to increasing the level of legal compliance of Ukraine with European Union norms, optimizing implementation mechanisms and ensuring the appropriate level of legal integration, which is a necessary condition for Ukraine’s accession to the EU.