Both perceived and objective measures of employee overqualification can impact job attitudes, various workplace behaviors, and work relationships. Utilizing motivation and capability-based theoretical approaches, this review summarizes research regarding the antecedents (demographic influences, personality traits, relational influences, job characteristics) and outcomes (individual health and well-being, turnover intentions and turnover, job performance, organizational citizenship behaviors, interpersonal relationships, innovative behaviors, counterproductive work behaviors, and career success) of overqualification. In addition, we review work done to date regarding the moderators and mediators of these relationships. Finally, we offer future directions for research