Ethical interpreting practice must be predicated on an ongoing analysis of relevant contextual factors that arise in the interpreting situation. Although endorsed to some degree in interpreting pedagogy, this assertion runs counter to much of the history and continuing rhetoric of the interpreting field. Interpreting students receive a mixed message when educators assert a non-contextual, rule-based approach to ethics while simultaneously responding to both ethical and translation questions with “It depends” - an obvious reference to the centrality of context in decision making. This article elucidates a teleological (outcomes-focused) ethical reasoning framework which hinges on a continuing analysis of the dynamic context of the interpreting situation. Grounded in the construct of practice profession responsibility, this approach scrutinizes the co-created dialogue between the interpreter, the consumers who are present, and the context of their collective encounter. It is argued here that critical reasoning in the service of work effectiveness equates to ethical reasoning, even if an ethical dilemma per se has not arisen. The authors’ approach to context-based interpreting work analysis and decision making, the demand control schema (DC-S), has been the subject of several research studies, including a recently-concluded dissemination project involving 15 interpreter education programmes across the United States.