The Klein et al. Unidimensional Target neutral (K.U.T.) commitment measure is a promising short self-report measure forming a counterpoint to the popular multidimensional approach to the assessment of commitment. The goals of the present study were to examine the construct reliability, convergent, discriminant, an incremental validity; and the measurement invariance (sex, education, job position) of the Polish version of K.U.T. The scale was evaluated using a sample of adults working for Polish organizations. Confirmatory factor analyses confirm original structure of the K.U.T.-PL and its measurement reliability and validity. Moreover, performed analysis showed that K.U.T.-PL was invariant across sex, education, and job position group. In conclusion, the findings confirm that the Polish adaptation of the K.U.T. presents solid psychometric properties and initial evidence of validity.