Based on an analysis of retrospective data tracing the professional trajectories of young people aged 18-29, this article offers an interesting reflection on the professional trajectories of young people in Benin, focusing specifically on forms of entry into the labour market, transition periods and job instability. We use specific complementary statistical analysis methods, both descriptive and explanatory, that are adapted and facilitate the study of life courses.Through a continuous time, regression model, the Cox model, we propose a better perspective for the analysis of the integration trajectories of young people in Benin. The data used come from the Survey on the Transition from School to Working Life (ETVA) conducted in Benin in 2012 by the National Institute of Statistics and Economic Analysis (INSAE).Analysis of the different forms, numbers and durations of transitions suggests that stability is compromised among young people aged 18-29 in Benin. The model highlights explanatory factors that stem from both internal and external causes.