The living standards of the working classes during industrialization continue to be the subject of debate in European historiography. However, other factors closely related to the institutional setting, such as the role played by social economy and the institutions for collective action, are seldom considered. This study focuses on these factors, and attempts to quantify the social impact of consumer cooperatives. We argue that these institutions substantially improved the lot of the working classes from the mid-nineteenth century onwards, helping them to increase their incomes, and access food and services, such as education and social services, which the state did not provide in sufficient measure. To demonstrate this point, we analyse thirty-five consumer cooperatives in Barcelona, an industrial centre in which these organizations were more popular than anywhere else in Spain. Our main conclusion is that consumer cooperatives increased the well-being of their members, helping them to meet their substantial calorific needs, although their diets were unbalanced and low-cost; members improved their income between five and ten per cent, by simply shopping at the institution, and gained access to basic welfare services.