Aim To investigate the relationship between bullying and (re)offending. Method Carrying out bivariate analyses and multivariate analyses (controlling for Attention Deficit Hyperactivity Disorder (ADHD), parental abuse and neglect and impulsivity) on three large high-risk groups (male and female juveniles with serious behaviour problems and a group of juvenile sex offenders). Results Only the relationship between bullying victimisation and re-offending in juvenile sex offenders is significant. Conclusions Addressing bullying as a risk factor for re-offending seems important in treatment of juvenile sex offenders. Copyright © 2011 John Wiley & Sons, Ltd.