This article introduces a new social scientific understanding of the relationship between households and finance. We call it financial oikonomization. Financial oikonomization signals a specific research problem and a distinctive analytical approach to this problem. The problem is how households are financially administered and governed. The approach is pragmatist and descriptive. It is oriented to the how, to the study of the problems and practices of those directly involved with administrating and governing households’ financial flows. On the basis of an extensive review of recent research, we distinguish seven operations of financial oikonomization, seven distinct problems—with their own practices, sites and techniques, but all oriented to the financial administration and government of households. We call these operations: budgeting, juggling, evaluating, attaching, educating, publicizing and infrastructuring.