The transformation of nineteenth-century governing classes remains one of the greatest themes of European history. This article focuses on the social and familial life of 116 high-ranking treasury clerks offering a different perspective on the development of the nineteenth-century state and the transformation of its governing classes. Instead of conceptualizing the formation of this new administrative elite exclusively in terms of administrative reform, career advancement based on individual merit, educational networks, or the result of connections with cabinet officers – as hitherto has been commonplace in the literature – this article will show that treasury clerks’ marriage ties, familial networks, and intergenerational support sustained their careers, families, and status during middle life and old age. By using class, life-cycle, and family lenses, this article argues that the consolidation, coherence, and cohesion of the new ‘administrative elite’, that is, the men who attained the top positions in the treasury and from there moved to other public establishments from 1850 to 1914, was also the result of transitions in their life cycle and family life. Apart from recasting the ascent of this group in social terms, this approach produces significant insights into the development of the nineteenth-century state, the transformation of governing classes, social classes, and family.