Over the years, school drop-out rates have been alarmingly high in the country’s educational institutions. In the subsequent technical courses at the Federal Institute of Santa Catarina (IF-SC), the high dropout rates have attracted attention. In addition to wasting public resources, the institution is not fully meeting its main objective, which is to raise the level of education of the population, demonstrating that action is needed to reverse this situation. With this in mind, the aim of this study was to understand the reasons that lead students to drop out of subsequent technical courses at IF-SC - Campus Criciúma. The specific objectives were to analyse the socio-economic profile of the students who dropped out and the profile of the students who remained; to identify the different reasons that lead students to drop out and that are not included in the Institutional Development Plan (IDP) and to present elements for the institution and staff to rethink the potential for change in their practices.