Workaholism is characterized by a state of mind in which professionals work excessively and compulsively. This study aimed to evaluate the psychometric properties of two versions of the Dutch Work Addiction Scale (DUWAS-16 and DUWAS-10) for the Brazilian context. A total of 571 workers, 65.5% female, with a mean age of 36.4 years (SD = 10.8) participated in the study. The confirmatory factor analysis (CFA) of DUWAS-16 showed that the scale can be used by adopting a structure of two oblique factors (Working Excessively and Working Compulsively), or a one-dimensional structure (Addiction). The CFA of the DUWAS-10 reduced version suggests that either the one-dimensional structure (Addiction) or two oblique factors (Working Excessively and Working Compulsively) are adequate. The results indicated that DUWAS-10 can be considered superior to DUWAS-16 to evaluate the dimensions of workaholism in the Brazilian context.