This study aims to investigate the relationship between credit risk and bank efficiency in developed and emerging countries using distance to default methodology. The research will compare credit risk measures in the US, UK, and BRICS countries. The study will extend the research by adding the firms in the BRICS to find the relation between the developed countries as well as the emerging countries. The research will also analyze the credit risk and bank efficiency of the banks in the developed countries and the emerging countries. The study will provide insights into the credit risk and bank efficiency of the banks in different countries.