Despite the ubiquity of illegality in today’s financial markets and the questions this raises with regard to the social legitimacy of today’s financial industry, systematic scrutiny of the phenomenon of financial crime is lacking in the field of sociology. One field of research in which the illegal dimensions of capitalist dynamics have long taken center stage is the field of white-collar crime research. This article makes available to economic sociologists an overview of the most important conceptual insights generated in the white-collar crime literature. In doing so, its aim is to provide economic sociologists with some orientation for future research on financial crime. Building on the insights generated in wcc literature, the article concludes by suggesting a number of promising avenues for future sociological research on the phenomenon of illegality in financial markets.