This study uses cognitive consistency theory to develop a model linking proactive personality to employees' work outcomes. This model was tested using a sample of 161 subordinate–supervisor dyads. HLM analysis results revealed that organisation‐based self‐esteem fully mediated the relationships between proactive personality and the behaviors of job performance and organisational citizenship behavior‐voice and partially mediated the relationships between proactive personality and the attitudes of job satisfaction and affective organisational commitment. Furthermore, perceived insider status moderated the relationship between proactive personality and organisation‐based self‐esteem in such a way that the relationship was stronger for individuals lower rather than higher in perceived insider status.