This longitudinal study aims to provide meaningful cutoff scores for total score of the teacher-rated Inventory of Callous-Unemotional Traits (ICU) from the preschool age until early adolescence, separately by age and sex. The ICU cutoff scores were determined by using low/high trajectories of oppositional defiant problems (ODP) and conduct problems in a Spanish community sample of 620 children that were followed up between the ages of 3 and 13. Receiver operating characteristic (ROC) curves with the two trajectories as criteria and ICU total score at each age as a predictor were estimated by sex separately, and the area under the ROC curve (AUC) was obtained. Average ICU cutoff scores of 26 for boys and 22 for girls were found to be of moderate utility for the prediction of high trajectories of each of ODP and conduct problems. They identified cases with an average sensitivity of 66% and specificity of 70% for boys and an average sensitivity of 69% and specificity of 72% for girls. The obtained cutoff scores might help clinical practitioners in their decision-making process when identifying low and high-risk groups of children. (PsycInfo Database Record (c) 2022 APA, all rights reserved).