This study systematically maps the research trends in the domain of “shadow education” over the last 40 years using metadata extracted from the SCOPUS database. The results reveal that the outputs of shadow education research have grown exponentially within the last decade. Bray and his colleagues from the University of Hong Kong, East China Normal University, and the Education University of Hong Kong have been the most prolific and influential research team. They are followed by Park and Byun from the USA, who have mostly worked on East Asian contexts. The USA, Hong Kong, South Korea, and the People’s Republic of China, have been the main sources of contributions and the University of Hong Kong has been the leading university in this field. Educational studies, economics, psychology, linguistics, and sociology have been the main disciplines researched within shadow education. Shadow education studies have revealed how shadow education can be a major instrument for maintaining and exacerbating social inequalities. They have also largely focused on the tangible (quantifiable) benefits related to improving students’ examination results. This study’s results stress the importance of regulating the private tutoring market, suggesting areas for ongoing research. © 2023 Emerald Group Publishing Limited.