This article provides a detailed analysis of the income and expenditure of a stem family household from Bastelica, Corsica, based on information collected in 1867 and 1887 according to the scheme recommended by Frédéric Le Play. The budget indicates the work undertaken by each member of the family and which economic activities were most valuable to the family in terms of the income they generated and the level of profit. The primary resource of the family was its members, as the family used almost no non-family labour. The composition of the household, and the distribution of its members in terms of age and sex, were therefore critical for its economic well-being. Members of the family contributed their labour according to their sex, age and place within the household. Males were better paid than females but each son received more than his father and the daughters were better paid than their mother. Apart from the father, the less well paid the family member, the longer the time they were at work. In addition, the two highly paid sons were unemployed for more than half of the year. This provided a reserve of labour in the event of a rise in the ratio of consumers to workers within the family. The economy of the family was based on the exploitation of its patrimony and on animal husbandry. Food constituted the largest single item of expenditure but the diet of this family did not provide the 2,800 calories of the average diet in France between 1855 and 1874.