The literature on ‘institutional corruption’ has paradoxically missed what seems a central application of this expression, its application to institutions that are corrupt. In this article, I defend a view of what it is for an institution to be corrupt, in terms of the motivation of the institution’s rules. If an individual office-holder or role-occupant is corrupt when their actions are improperly motivated by private gain, then an institution is corrupt when the same can be said of its rules: the (...) institution’s rules are improperly motivated by private gain. Or if we should prefer a narrower account of corrupt conduct by individuals, as necessarily involving transactions with third parties, a correspondingly narrower account of an institution’s corruptness can also be given. Under either of these versions of my view, an institution’s being corrupt is to be distinguished from something else that might be called ‘institutional corruption’, namely the corruption of institutions, in the sense of their being degraded or undermined. I argue that some of the literature’s best-known accounts of ‘institutional corruption’ are best interpreted as being about the degrading of institutions, rather than about what it is for an institution to be corrupt. (shrink)