The object of research is the theory of formation of the shadow sector of the economy. The paper presents an evolutionary analysis of theories of the shadow economy emergence. It deals with the study of the main theories of the emergence of the informal sector of the economy and determines their features, preconditions of origin, and drivers. Based on the systematization of literary research of scholars, the following groups of theories have been identified: modernization theory, neoliberal theory, institutional theory, the theory of political economy. The analysis of the economic content of the concept of the shadow economy emergence has been used to identify the most influential drivers of the transition of economic entities into the «und...