Background: In the face of economic uncertainty and increasing demands for transparency, companies are required to improve performance through the implementation of sustainability reporting, corporate governance, and maintaining audit quality to build investor and stakeholder trust.

Objective: This study aims to test the influence of these three factors on firm performance in Indonesia, considering the limited number of studies that discuss the three simultaneously in the context of Indonesian companies across sectors.

Research Methods: Using secondary data from financial and annual reports of Indonesian companies between 2019 and 2023, a purposive sampling technique was applied. Data analysis involved quantitative methods to test hypotheses through statistical models.

Research Results: The results indicate that corporate governance mechanisms, particularly ownership concentration and board size, negatively influence firm performance. Sustainability reporting positively affects performance, and audit quality strengthens the relationship between sustainability report disclosure and firm performance.

Originality/Novelty of Research: This research contributes to the existing literature by highlighting the significant role of sustainability and governance practices in enhancing firm performance in the Indonesian context, and by exploring the moderating effect of audit quality, which has been less studied.

Agung, I. G. N. (2006). Statistika: Penerapan Model Rerata-Sel Multivariat dan Model Ekonometri dengan SPSS. Yayasan Sad Satria Bhakti.

Alfraih, M. M. (2019). The role of audit quality in firm valuation: Evidence from an emerging capital market with a joint audit requirement. International Journal of Law and Management, 58(5), 575–598. https://doi.org/10.1108/IJLMA-09-2015-0049

Al-Shaer, H. (2020). Sustainability reporting quality and post-audit financial reporting quality: Empirical evidence from the UK. Business Strategy and the Environment, 29(6), 2355–2373. https://doi.org/10.1002/bse.2507

Bhagat, S., & Bolton, B. (2019a). Corporate governance and firm performance: The sequel. Journal of Corporate Finance, 58, 142–168. https://doi.org/10.1016/j.jcorpfin.2019.04.006

Bhagat, S., & Bolton, B. (2019b). Corporate governance and firm performance: The sequel. Journal of Corporate Finance, 58, 142–168. https://doi.org/10.1016/j.jcorpfin.2019.04.006

Boubaker, S., Houcine, A., Ftiti, Z., & Masri, H. (2018). Does audit quality affect firms’ investment efficiency? Journal of the Operational Research Society, 69(10), 1688–1699. https://doi.org/10.1080/01605682.2018.1489357

Brigham, E. F., & Houston, J. F. (2006). Fundamentals Of Financial Management. Salemba Empat.

Brigham, E. F., & Houston, J. F. (2021). Fundamentals of Financial Management (15th ed.). Cengage Learning.

Dash, S. R., & Raithatha, M. (2019). Corporate governance and firm performance relationship: Implications for risk-adjusted return behavior. Managerial and Decision Economics, 40(8), 923–940. https://doi.org/10.1002/mde.3080

Forum Corporate Governance in Indonesia (FCGI). (2001). Corporate Governance: Tata Kelola Perusahaan (3rd ed.). FCGI.

Guluma, T. F. (2021). The impact of corporate governance measures on firm performance: the influences of managerial overconfidence. Future Business Journal, 7(1). https://doi.org/10.1186/s43093-021-00093-6

Ismah Anggraini, D., Fitah Kusuma, P., Ekonomi dan Bisnis, F., & Wijaya Putra, U. (2023). Revealing the Company’s Positive Image Through Sustainability Report Based on GRI Standards and Financial Performance in the Agriculture, Mining, and Basic Industries. Jurnal Ekonomi, 12(01), 2023. http://ejournal.seaninstitute.or.id/index.php/Ekonomi

Laskar, N. (2019). Does Sustainability Reporting Enhance Firms Profitability? A Study on Select Companies from India and South Korea. Indian Journal of Corporate Governance, 12(1), 2–20. https://doi.org/10.1177/0974686219836528

Naibaho, E. A. B., & Simatupang, A. (2024). Fundamental Analysis of the Firm on StockReturns in the Uncertainty Caused By the Covid - 19 Pandemic : The Case of Emerging Economy. Corporate and Business Strategy Review, 5(1 Special Issue), 283–294. https://doi.org/10.22495/cbsrv5i1siart3

Ngatno, Apriatni, E. P., & Youlianto, A. (2021). Moderating effects of corporate governance mechanism on the relation between capital structure and firm performance. Cogent Business and Management, 8(1). https://doi.org/10.1080/23311975.2020.1866822

Puni, A., & Anlesinya, A. (2020). Corporate governance mechanisms and firm performance in a developing country. International Journal of Law and Management, 62(2), 147–169. https://doi.org/10.1108/IJLMA-03-2019-0076

Rahim, S., Safitra, H., & Putra, A. H. P. K. (2024). Sustainability Report and Financial Performance: Evidence from Mining Companies in Indonesia. International Journal of Energy Economics and Policy, 14(1), 673–685. https://doi.org/10.32479/ijeep.14994

Shaban, O. S., & Zarnoun, R. S. (2024). Impact of sustainability reporting on financial performance and risks: Evidence from the emerging market. Risk Governance and Control: Financial Markets and Institutions, 14(4), 96–109. https://doi.org/10.22495/rgcv14i4p10

Shleifer, A., & Vishny, R. W. (1997). A survey of corporate governance. Journal of Finance, 52(2), 737–783. https://doi.org/10.1111/j.1540-6261.1997.tb04820.x

Zhang, L., Ma, Y., & Hu, Y. (2022). Does CEO duality worsen or fosters audit quality: evidence from Chinese firms? Economic Research-Ekonomska Istrazivanja , 36(1), 1–21. https://doi.org/10.1080/1331677X.2022.2095521