BACKGROUND: Bipolar disorder (BD) is a chronic condition with a high relapse rate, morbidity and psychosocial impairment that often persist despite pharmacotherapy, highlighting the need for adjunctive psychosocial treatments. It is still unclear which populations are most likely to benefit from which approach and the best timing to implement them.METHODS: A review was conducted with the aim to determine what the efficacious psychological treatments are, for whom and when. Randomized-controlled trials and key studies in adults with BD published until June 2013 were includedRESULTS: The adjunctive psychological treatments most commonly tested in BD were cognitive-behavioral therapy, psychoeducation, interpersonal and social rhythm therapy, and family intervention. The efficacy of specific adjunctive psychosocial interventions has been proven not only in short- but also long-term follow-up for some treatments. Outcomes vary between studies, with most trials focused on clinical variables like recurrence prevention or symptom reduction and less attention, although gradually expanding, paid to other aspects such as psychosocial functioning. The samples were usually in remission or with mild symptoms when recruited but there were a few studies with acute patients, which resulted in discrepant findings. The efficacy of psychological interventions seems to differ depending on the characteristics of the subjects and the course of the illness. Different approaches, such as functional remediation and mindfulness-based cognitive therapy, have begun to be tested in BD.LIMITATIONS: Heterogeneity of comparison groups.CONCLUSIONS: Adjunctive psychological treatments can improve BD outcomes. Although several moderators and mediators have been identified, more research is needed to design shorter but effective interventions tailored to the characteristics of the target population. Ideally, the treatment should be introduced as soon as possible, although it does not mean that more complex patients would not benefit from psychotherapy.