Scandinavian health policy supports prolonged home-based care for people with dementia. User participation is expected to reduce family burden. The aim of this study was to explore how formal and family caregivers experience collaboration while providing home-based dementia care, with a focus on user participation. Seventeen qualitative in-depth interviews were conducted among formal and family caregivers in rural municipalities. The theme identified during this process was 'negotiating participation in decisions'. This theme was analysed using positioning theory.