The informal economy can be considered as an ubiquitous phenomenon. Various quantitative and qualitative researchers argue the presence of informal economic activities in the everyday life in most European countries and, even broader, around the world. The existing research in Belgium is primarily characterized by a quantitative approach, pointing to a considerable share of the informal economy in the gross domestic product. Qualitative research on the Belgian informal economy on the other hand is rather scarce. We try to fill in this lacuna by conducting an in-depth analysis of three Belgian employment sectors (seasonal work, street trade and sex work) by means of three case studies, in which the presence of informal activities, their relations with formal activities and with the current policy are investigated. This article thoroughly describes and reflects on the methodological choices and issues encountered in our first case study, being the seasonal work in the fruit farming in south-Limburg. More specifically, it explores to what extent comparable methodological issues are
experienced as in preceding research in this case. In addition, as such methodological literature on this specific topic is limited, this article aims to offer practical insights that might serve as a handle for future qualitative research in this area.