The cost of sickness absence is high for employers, insurance companies and society, as well as for workers themselves. In times of crisis and resource scarcity - both at company and governmental level - it becomes ever more important to shed light on the diversity of methods and resulting cost outcomes. This is exactly what this factsheet aims to provide. First, it gives a brief overview of the most prominent methods for calculating sickness absence costs, and discusses the most important differences between them. Second, it introduces a new approach, linking the Netherlands Working Conditions Survey (NEA ; Koppes et al., 2009) with personal income data from Statistics Netherlands (CBS ; van den Brakel & Moonen, 2007). Overall, this factsheet strives to be a useful overview for policy makers, (occupational) health professionals, and scientists for modeling health impact assessments and developing interventions.