This Mental Health Foundation intervention runs for nine-months and involves workshops and peer-group meetings in which participants learn goal-setting and problem-solving techniques and have an opportunity to socialise and share experiences. Well-being, functional living skills, absences from work and use of health, social care and criminal justice services were measured for 262 participants at baseline, six months and three months post-intervention. The cost of the intervention was calculated to be £894 per person. We were unable to identify a suitable comparison group. For the intervention group, well-being and functional living skills improved over time. Costs associated with use of services over the first 6 months were on average £20 per week higher than at baseline. However, at three months post-intervention these were £62 per week lower than at baseline. If the intervention was responsible for 27 per cent of these identified savings, and if individuals using the service would not have experienced changes without it, then peer-led self-management could be considered cost-effective. Detailed findings have been published.