This paper argues that a proper evaluation of the notion of efficiency in business ethics requires that we separate efficiency qua human good from the originally value-neutral sense of the term. The adverse consequences of hyper-efficiency consist in paradoxically causing greater inefficiencies (‘perversity’) as well as a negative impact on the human capacities to pursue various forms of excellence (‘jeopardy’). In contrast to its negative consequences, the precious good of efficiency can be formulated in terms of Alasdair MacIntyre’s influential practice-institution (...) framework. The paper proposes that efficiency be defined in terms of the kind of success towards which it aims; while it never quite reaches the status of an internal good, efficiency fluctuates between being an external good proper and what we call a paradoxical good, with attributes of both internal and external goods. The archetype of a paradoxical good is the good of success qua victory in the domain of sports, which shares attributes of internal goods (since it is defined as a necessary and desirable goal by the practice itself) and external goods (since victory for one implies the defeat of another, a zero-sum logic). The paper fleshes out the consequences of this paradox in MacIntyre’s framework by proposing a three-stage model of success and efficiency for various practices. (shrink)