The purpose of this study was to examine: (a) whether a treatment rationale increases the acceptability of internet-based cognitive behavioral therapies (iCBT) among Black individuals and (b) the influence of authority on attitudes toward iCBT. Participants (N=268) were randomly assigned to receive a treatment rationale or not. Participants completed a measure of barriers to psychological treatment and acceptability toward iCBT. Participants additionally rated their likelihood of using iCBT if endorsed by a health professional or spiritual leader. Results did not indicate a difference in acceptability between those who did or did not receive a treatment rationale, however, provision of the rationale improved acceptability for those reporting few barriers to treatment. Furthermore, participants indicated greater likelihood of using iCBT when endorsed by a health professional compared to a spiritual leader. This study provides evidence for strategies for improving the appeal of internet-based mental health treatments among Black Americans.