Purpose The purpose of this paper is not only to investigate the impact of self-determined motivation on counterproductive work behaviors (CWBs), but also to examine the moderating role of perceived job insecurity in CWB. Design/methodology/approach This study utilized Partial Least Squares analysis to examine the data. In total, 292 private bank employees that experienced bank mergers and acquisitions before were invited to participate in this study. Findings The study findings have indicated that perceived autonomy will be positively linked to perceived competence and relatedness, and perceived competence and relatedness will be negatively associated with organizational and interpersonal CWB. Moreover, it has been found that perceived job insecurity could play a key role in moderating the link between self-determined motivation and CWB. Originality/value Although several researchers have highly focused on the critical roles of self-determined motivation and perceived job insecurity in organizational competitiveness, little is known about whether perceived job insecurity could play a key role in moderating the relationship between self-determined motivation and CWBs.