This article examines employer organizations and labour immigration policy in Australia and the United Kingdom. Drawing on 102 elite interviews, it analyses employer organizations’ preferences and influence over recent reforms. The article builds on Culpepper's arguments relating to the significance of political salience and identifies the importance of various institutional factors, particularly social institutions, in shaping employer organizations’ decisions and engagement with the policy process. Political salience and social institutional legacies are critical for explaining why employer organizations played a central role in driving labour immigration reforms in Australia and a marginal role in the UK. Large intakes of workers from the European Union, which sustained immigration as a high salience issue and fuelled the Brexit campaign, also influenced the strategies of UK employer organizations.