This study addressed the unexamined issue of how and when distributive justice and procedural justice interact to predict turnover intention using a mediation–moderation framework. Survey data from 168 employees showed that affective commitment mediated the relationship between distributive justice and turnover intention, and this mediated effect varied across levels of supervisory procedural justice. Specifically, at high levels of procedural justice, affective commitment partially mediated the distributive justice–turnover intention link; at low levels of procedural justice, affective commitment fully mediated this link. The findings draw attention to the (a) importance of affective commitment in the absence of distributive and procedural fairness and (b) role of supervisory procedural justice in attenuating the adverse effects of low affective commitment on turnover intention.