This study employs a robust quantitative ex post facto research design to investigate the complex relationship between audit fees and earnings management. The financial information of 164 firms admitted to the Tehran Stock Exchange (TSE) was used from 2010 to 2019 (pre-COVID period) to achieve the research goal. Analysing data from the Tehran Stock Exchange firms, the study uncovers an inverted U-shaped relationship between audit fees and earnings management. This suggests that moderate audit fees can lead to higher earnings management. Key contributions of this paper include highlighting the role of audit fees in influencing financial reporting quality and risk management, providing empirical evidence on the asymmetric effects of normal and abnormal audit fees on earnings management, and emphasising the need for balanced audit fee structures to ensure financial transparency and mitigate risk. The findings offer valuable insights for academics, practitioners, and policymakers in understanding the nuances of audit fees and their impact on corporate financial practices. This study advances the literature on financial risk management and corporate finance. It emphasises the importance of balanced audit fee structures for management teams, auditors, and policymakers to ensure transparent financial reporting practices.