Promotability evaluations are important for individuals' career development and organizations' human resource management practices. Nevertheless, little empirical research has addressed predictors of promotability evaluations, and the studies that have, have often focused on current job performance and fixed, nonbehavioral predictors. This study takes a more behavioral approach, and investigates whether besides how one performs (i.e., job performance) what one performs also serves as an indicator of promotability. Specifically, we examine the relationship between employees' challenging job experiences and supervisors' evaluations of employees' promotability over and above employees' current job performance. Results from 3 field studies, sampling different types of employees via different measures, consistently showed that challenging job experiences explained incremental variance in supervisory and organizational evaluations of promotability over and above current job performance and job tenure.