This report investigates the associations between quantitative and qualitative job insecurity and employee well-being, focusing on a study conducted in the Belgian banking sector. The research explores how employees' concerns about job continuation (quantitative insecurity) and job quality (qualitative insecurity) relate to their job satisfaction and psychological distress. The study surveyed 15,000 employees across 63 banks, examining factors like job satisfaction, emotional distress, and control variables such as gender and age. The report uses regression analysis to assess the relationships between the two forms of job insecurity and employee well-being, finding that both quantitative and qualitative job insecurity negatively impact job satisfaction and are associated with higher levels of psychological distress. The methodology, limitations, and implications of the findings are discussed, highlighting the importance of addressing job insecurity to promote employee well-being.