To understand students' motives in obtaining postgraduate qualifications, we elicit intentions to pursue postgraduate education and beliefs about its returns in a sample of 1,002 university students. We find large gaps in perceptions about the immediate and later-life benefits of postgraduate education, both between first- and continuing-generation students and within the latter group. Differences in student beliefs about returns can account for 70% of the socioeconomic gaps in intentions to pursue postgraduate studies.