Low pay is a significant and growing issue in many developed economies. Sectoral approaches are often used in both economic development and labour market policy, yet there is little evidence on how low pay and earnings mobility vary by sector. This article investigates this issue in the UK. It shows pronounced sectoral variations in low pay and earnings mobility. It highlights the policy implications of growth in large, low paying sectors. While policymakers have focused on high-wage, high-skill sectors, efforts to improve productivity in low-wage sectors could improve living standards and the UK’s economic performance.