Working at home is often claimed to adversely affect employees' career progress, presumably because supervisors are inclined to negatively evaluate the performance of employees whose activities are not available to frequent observation. However, such claims are usually based on studies of supervisors' attitudes, not on direct evidence of the achievements of employees who work at home. This research examines the impact of working at home on career outcomes, by comparing a variety of measures of achievement by professional employees who work at home with those of similar employees who do not. The findings contradict the common argument that working at home is associated with career costs. The implications for further research and practice are discussed.