We investigated the effects of a student career choice guidance on identity development. We compared the levels of identity development before and after the guidance. In addition we compared the identity development of the participants with a norm group of the same age and educational level. Following the guidance we found—as expected—that the participants showed a significant increase in commitment strength in the vocational and personal domains and in global identity. The effect size was moderate. The participants showed significantly higher increase levels than did the norm group. The initial commitment strength in the group with career choice problems was lower as compared to the norm group in the vocational and personal domain but not in the global identity.