It is commonly reported that fathers in Britain work longer hours than non-fathers. This statistic is frequently used as supporting evidence for the argument that the role of fathers within families remains primarily concerned with financial provisioning. In this paper it is shown, through regression models, that once other factors are taken into account the significance of fatherhood in relation to hours of paid work disappears. This highlights fatherhood as a period in the life course which often coincides with longer working hours but challenges the assumption of a causal relationship.