This paper reports data from the normative study of the Portuguese version of the Youth Level of Service/Case Management Inventory (YLS/CMI), risk assessment tool designed to assess risk for general recidivism, identify criminogenic needs and guide case management of young offenders. Normative data of Portuguese YLS/CMI were established from a sample of 2363 young offenders from juvenile justice system. We also analyzed the psychometric properties. The results point to excellent indicators of intra and inter- rater reliability, a good internal consistency and discriminative power between sub-samples. The preliminary study on predictive validity (AUC = .77) supports the use of the Portuguese adaptation of the YLS / CMI in predicting recidivism.