This study aims to contribute to the study of emotional schemas, through the adaptation of the Leahy Emotional Schema Scale (LESS) to Portuguese. The LESS is a 50 item self-report with 14 theoretical dimensions, representing concepts, evaluations, attributions of emotions, and strategies of emotion regulation (Leahy in Cognit Behav Pract 9(3):177–190, 2002. https://doi.org/10.1016/S1077-7229(02)80048-7). Translation, back-translation and pilot assessment of LESS’s Portuguese version were completed. Data was collected online with 396 participants. An exploratory principal component analysis was conducted. Parallel analysis revealed a 5-component structure, which after the deletion of eight items generated a final solution explaining 48% of the variance. Components internal consistency was adequate and convergent validity supported with significant correlations with difficulties in emotional regulation and emotional processing, and psychopathology. It presents dimensions that are highly relevant for assessment, case conceptualization and clinical decision making. Although this scale is related to a specific cognitive theory, the construct and its subscales may be useful beyond the psychotherapeutic model, stressing the transtheoretical potential of the scale.