This paper tests the rational-choice approach to fertility decisions by investigating the relationship between parenthood and well-being in a large sample of individuals from 94 countries. We find that world- wide, controlling for demographic and socioeconomic characteristics, having children has a negative effect on well-being. Conditioning on age, gender, marital status and education can only partially help to interpret this finding. We show that the negative effect of parent- hood on well-being is explained by a large adverse impact on financial satisfaction, that on average dominates the positive impact on non- financial satisfaction. The results are robust to alternative empirical specifications and to the inclusion of the reported ideal number of children as a proxy variable to address the endogeneity of parenthood decisions.