Purpose: Social action implemented by the Church via its affiliated entities, foundations and associations may be viewed as a uniform activity. In reality, however, several organizational profiles exist that depend on the origin of these organizations (lay or religious), the scope of their activities (local or general) and their dependence on resources (whether from public administration or civil society). The paper aims to discuss these issues. Design/methodology/approach: In this paper, the authors examine this diversity based on a 2015 study of every Catholic Church social organization with headquarters in Catalonia. For the study, the authors conducted a detailed analysis of these organizations in order to determine their nature, scope and structure. The methodology combined questionnaire, interviews and non-participant observation. Findings: The social actions of these organizations lead to interesting debates, such as those on: charity/assistentialism vs social justice; professionalization vs voluntarism; and personal autonomy vs functional dependence resulting from the action. This study also highlights how important it is that Church organizations carry out social actions to generate social welfare in the welfare states of southern European countries. Originality/value: It is the first time that a study of the social impact of the church and its organizational implications in Spain has been made.