Systematic evaluation of patient outcome and progress is important for determining the effects of psychotherapy and for providing quality information to therapists to adjust treatment. In this report, we reviewed the research on outcome and progress monitoring, including barriers to their implementation. The research indicates that outcome monitoring (the assessment, at both intake and at the cessation of treatment, of patient functioning), and progress monitoring (repeated assessment of patient progress during therapy with continuous feedback to the therapist on the patient’s status) by using psychometrically sound instruments, has the potential to benefit both psychological service providers and the populations they serve. However, despite ethical imperatives to do so, the majority of psychotherapists in North America currently do not assess patient outcome or progress. Barriers to implementing outcome or progress monitoring include insufficient knowledge, insufficient training, and practical concerns. The Canadian Psychological Association Task Force on Outcome and Progress Monitoring in Psychotherapy recommends widespread implementation of outcome and progress monitoring in clinical contexts including public and privately funded practices; that psychologists use the principles outlined in this report to advocate for adequate implementation and uptake of outcome and progress monitoring in their places of practice; that outcome and progress monitoring be part of the clinical training curriculum and of accreditation standards of clinical training programs; and that the Canadian Code of Ethics for Psychologists state more explicitly that psychologists monitor patient outcomes and progress. (PsycINFO Database Record (c) 2019 APA, all rights reserved)