The sources formally documenting how tax policy evolves fail to capture many of the complexities inherent in such processes. Insights into such approaches would guide other tax administrations in navigating tax policy change in an international domain. This paper examines the historical background to the introduction of the Irish 12.5 percent corporate tax rate in 2003 in the face of the European Union’s (EU) dissatisfaction with the existing regime. A low corporate tax rate has long been seen as a critical element of the country’s industrial development strategy. Employing an oral history method to identify the perspectives and objectives of those involved in the policymaking process, we provide a case study of how one tax administration resolved what was seen as a particularly significant public policy dilemma.