In many countries, there are calls for children to be allowed to participate in social work decision-making. This article analyses child participation vis-à-vis social assistance (SA), which is a municipal cash benefit representing the last safety net. In Sweden, SA is part of the professional field of social work and national policy recommends that children are consulted. The aim is to analyse local policies and practices regarding child participation, and the data are based on case studies in six social service offices. Unlike most participation studies, children’s participation is conceived as an institutional pressure and the concept of decoupling is used to examine how local authorities relate to participation. The findings show that in local policies there is a general openness towards participation, but in practice no efforts are being made to promote participation. The absence of participation is analysed as deriving from organisational barriers (practices are adult-centred and child welfare units are seen as responsible for participation) and the scepticism of social workers (participation is an infringement on parental obligations and children should be protected from involvement in financial issues). The article ends with a discussion on the decoupling and adequacy of children’s participation in settings comparable with Swedish SA.