The aim of this study is to test the audit fee determinants for companies listed on Nasdaq OMX Stockholm Stock Exchange and to examine whether the audit fee determinants diverge for ownership structures. By testing the audit fee determinants in a Swedish setting the study contributes to the research body in two ways; by testing a previously sparsely researched setting and examining the monitoring need for different ownership structures. The results indicate that audit fees are explained to a large extent by accounting complexities, business complexities and assurance.  The results also suggest that ownership structure does not have a large effect on the monitoring need.  Altogether the results provide further evidence on audit fee determinants whilst adding initial insight into the area of audit fee determinants for ownership structures.