This article provides a comparative legal analysis of national regulations governing the law applicable to alimony (maintenance) obligations in various countries. It explores how different legal systems—namely those of the United Kingdom, Turkey, South Korea, France, and Germany—approach the determination of applicable law in cross-border maintenance cases. The study focuses on both substantive and conflict-of-law rules, addressing the role of international treaties such as the Hague Convention on the International Recovery of Child Support and Other Forms of Family Maintenance. By examining legislative frameworks and judicial practices, the article highlights key differences and commonalities in national approaches, contributing to a broader understanding of the harmonization challenges in private international family law.