This article explores the relation between the expulsion of Jews from medieval England and France and state building, geo-politics, regime styles, and taxation in these countries. Jews were evicted as a result of attempts by kings to manage royal insecurity, refashion relations between state and society, and build more durable systems of taxation within the territories they claimed as theirs. As they engaged in state building and extended their ties, often conflictual, to key societal and political actors, Jews became financially less important but more visible as outsiders, becoming a liability for the crown. Similar mechanisms were at work despite important differences distinguishing England's growing regime of rights and representation and France's emergent absolutist patrimonialism.