Objective <p>A&#xa0;lack of insight into their disorder is believed to be a&#xa0;crucial factor increasing the risk of reoffending for forensic patients. However, this relationship is merely assumed but not empirically tested. Thus, this study provides valuable information for the research community, treating therapists, the judicial system, and forensic patients.</p> Method <p>A&#xa0;total of 106 case files from forensic patients at LVR Klinik Köln who were diagnosed with schizophrenia spectrum disorders were analyzed to assess the insight scores (using the Scale to Assess Unawareness of Mental Disorder) and the number of reoffences for each patient on long-term leave. Transfers back to the hospital resulting from reoffending behavior and noncompliance with laws and regulations were summed to assess the number of reoffences.</p> Results <p>A&#xa0;positive relationship between lack of insight and reoffending was found in the sample. Furthermore, patients who committed a&#xa0;reoffence (<i>N</i> = 38) had significantly less insight into their disorder in comparison with patients who did not reoffend (<i>N</i> = 74).</p> Conclusion <p>The results of this study indicate that the risk of reoffending is higher for forensic patients who lack insight into their disorder than for those with insight. Combining prognostic instruments with insight scores would improve the quality of prognostic reports. Supporting patients to gain insight into their disorder through psychoeducation could reduce the risk of reoffending.</p>