The relative power of personality, motivational, and perceived group climate factors in predicting individual innovation at work was tested in a sample of 435 people, in a three stage longitudinal study (17 months). The research sample included people from a wide range of occupations within the UK National Health Service. Personality factors were most consistent in predicting change in innovation, while perceptions of group climate did not significantly predict any additional variance in individual innovation. The results suggest that individual workrole innovation may be due more to individual personality factors or creativity than to people's perceptions of the supportiveness or otherwise of their social environment.