This article discusses the principles of good corporate governance and their effects on firm performance, legal compliance, and economic growth. It uses Commonwealth Bank of Australia as a case study to illustrate the importance of adhering to these principles. The article covers six principles of good corporate governance, including effective oversight, board structure, ethical practices, timely disclosures, risk management, and fair remuneration. It also highlights the impact of good corporate governance on job security, legal compliance, and economic growth.