This article offers a practical tool to support guidance counsellors in their responsibility to manage ethical aspects of their work. That tool consists of a procedure to formalise the making of ethical decisions. First, the nature of a profession and issues of statutory regulation are considered. Next, the nature of codes of ethics, and the desirability of a formal process for making ethical decisions, are discussed. The main body of the article consists of a worked example of ethical decision-making about a fictional case history.