With the growing number of studies investigating employee perceptions of HR practices, the field of SHRM is challenged with monitoring how cumulative insights develop. This paper presents a systematic review on employee perceptions of HR practices in terms of 1) how they are examined (as an antecedent, mediator, or outcome), 2) the theoretical perspectives that explain this construct, and 3) the type of conceptualizations of employee perceptions of HRM that have been used in the extant SHRM research. The findings illustrate how scattered current approaches are in terms of how employee perceptions of HRM have been examined. In addition, a range of theoretical frameworks that advocate and support the employee perspective on HRM have been used, showing that a single perspective on employee perceptions of HRM seems infeasible. Finally, a variety of descriptive and evaluative conceptualizations have been used. Recommendations and avenues for future research to gain a more comprehensive understanding of employee perceptions of HRM are provided.