The main aim of the study was to analyze and evaluate the level of corporate governance practices in Saudi Arabia. The quantitative research was conducted to investigate the impact of corporate governance on the performance of Saudi Arabia. The study aims to measure the impact of corporate governance and IFRS on the financial, marketing, and operational performance of Saudi Arabia. The study raises a question about the level of corporate governance adoption and IFRS along with the impact of corporate governance practices. The data was collected from the Saudi Stock exchange database "TADAWUL".

 The research included an operational performance for return on assets, market performance, and financial performance with the return on Equity (ROE). In the research, several controlling variables were used such as external auditor, firm size, firm age, and board of directors. The descriptive results show that the average index of corporate governance during 2015-2018 was greater than 50% of the companies that adopted corporate governance regulations. The analysis concluded that the implementation of IFRS and corporate governance improved performance of firms in Saudi Arabia. The regression model used in the analysis demonstrated the estimated measures and the impact of firm performance to consider the control variables.

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