This graduate work examines the imapct of the introduction of the euro on Company of capital. For easier undarstanding the topic, firsty is describe what is a Company of capital in general, which companies operate in the Republic of Croatia. The work particularly talks about the role of share capital, his parts and how if affects membership rights. The introduction of the euro as the official currency in the Republic of Croatia is a consequence of the entry into the European Union, which provided the basis for the introduction of the euro, such as the Copenhagen and Madrid criteria, principles and general rules, all of which are covered in this graduate work. Finally, there is a detailed describe of the process of matching the share capital of all capital companies in the Republic of Croatia and why a limited partnership has an obligation to match share capital, although it is not considered a Company of capital. The basis of obligation for alignment is in primary law European union, regulations of European union, the Law on Amendments to the Law on Commerical Companies of September 28, 2022., and February 10, 2023 and the Law on the introduction of the euro as the official currency in the Republic of Croatia. The graduate work also deals with the problems and possible solutions from the adoption of amendments to the Law on companies.