The Barratt Impulsiveness Scale–short form (BIS–15) is a self-report questionnaire for the assessment of impulsivity as a trait (Spinella, 2007). I have received several requests by researchers and practitioners that have asked me what cut-off score the BIS–15 has. The answer is that is does not have one. In this manuscript, I will try to answer why that is, why it is probably not necessary to have one, and which scores may still be considered as “high”.