Background Less than 10% of people with intellectual disabilities are employed. The aim of the present study was to investigate what psychological factors might predict employment outcome for people with intellectual disability who had received a placement in a supported employment service. Method Sixty people were interviewed whilst they were in the supported employment preparation agency and where possible 3 and 9 months after leaving. The structured interview included a number of psychological measures. Those who subsequently gained employment were compared with those who did not. Results Those who gained employment were significantly more motivated by status aspiration, and judged themselves significantly less happy than those who did not gain employment, at the first interview. Conclusions It is possible that people who are more dissatisfied with their life might be more motivated to change their circumstances. Supported employment agencies might consider using a measure of motivation as an entry criterion or as a way of identifying who needs help with developing motivation.