This paper examines the implementation, communication and benefits of corporate codes of ethics by the top companies operating in Australia, Canada and Sweden. It provides an international comparison across three continents. It is also based on a longitudinal approach where three national surveys were performed in 2001–2002 and replications of the same surveys were performed in 2005–2006. The empirical findings of this research show in all three countries that large organisations indicate a substantial interest in corporate codes of ethics. There are, however, differences in the ways that the companies in each country implement and communicate their corporate codes of ethics and the benefits that they see being derived from them. The longitudinal comparison between 2001–2002 and 2005–2006 indicates changes in the implementation, communication and benefits of corporate codes of ethics in the three countries.