The article discusses a vital problem of the legal restrictions imposed on single-member limited liability companies under the provisions in force. In the first part of the text, the author explores the binding regulations applicable to single-member companies and arranges them in a way that it is possible to classify them within the legal framework. In the second part, the author deals with the legitimacy of existence of the said restrictions on the functioning of single-member companies, analyses the superficiality of application of particular solutions, and defines the most significant directions of changes necessary to abolish the restrictions imposed on single-member limited liability companies.