Despite the emphasis of homework assignments in psychotherapy research and practice, methods to assess homework compliance have been relatively neglected. This article presents a brief review of 32 studies that described the assessment of homework compliance, and evaluated homework compliance in relation to treatment outcome. More than half of the studies relied on a single source of compliance data (n = 23), eight studies involved retrospective accounts, and only four studies used the same measure of homework compliance. The vast majority of studies focused on the assessment of “homework compliance” without consideration of the “quality of homework completion” or other key factors. A more comprehensive framework for homework compliance is discussed, and a new Homework Rating Scale (HRS) is proposed as the first step towards assisting the field in a more reliable and valid assessment of homework compliance.