The article deals with the correlation of the concepts of a source of law and an external form of its expression. Separate external forms of expression of entrepreneurial law are analysed. The author concludes that it is necessary to distinguish between the source of law as a set of socio-economic factors that predetermine its content, and the external form of expression of law. The source of entrepreneurial law is a set of socio-economic factors that determine the legal regulation of entrepreneurial activity as the free activity of individuals. External forms of expression of entrepreneurial law are legislation, customs, legal practice, doctrine, generally recognized principles and norms of international law, and international treaties of the Russian Federation. The redundancy of legislation as a means of regulating entrepreneurial relations is also noted.