This study aims to investigate the contributions of supplementary and complementary fit on the affective commitment. Person-organization fit is also examined in order to analyze its mediating effect on this relationship. Data is collected by an online questionnaire through a convenient sample of 224 employees working in various industries in Turkey. Research hypotheses are tested by regression analyses. Analyses results have shown that both supplementary and complementary fit have positive effects on affective commitment and person-organization fit mediates this relationship. (C) 2014 Published by Elsevier Ltd.