<![CDATA[This study aims to empirically evaluate the impact of tax planning, earnings management practices, and Good Corporate Governance (GCG) mechanisms on firm value within the banking sector companies listed on the Indonesia Stock Exchange (IDX) from 2020 to 2024. In this study, governance mechanisms are proxied through institutional ownership, managerial ownership, and the strategic role of independent commissioners as internal supervisors. Utilizing a purposive sampling technique, the research identified 4 banking companies that met specific criteria, resulting in a total of 20 observations over the five-year study period. All collected secondary data were statistically processed using Eviews software. The comprehensive data analysis reveals that earnings management is the only variable that contributes significantly to influencing fluctuations in firm value in the capital market. Conversely, tax planning factors and corporate governance elements such as ownership structure and the presence of independent commissioners—do not demonstrate a meaningful effect on increasing the value of banking entities. These findings provide new insights and practical contributions for management regarding the crucial importance of appropriate and transparent earnings management strategies as a primary instrument to boost firm value and build investor confidence. Based on these results, it is expected that companies will become more selective in implementing accounting policies to strengthen their market position and competitiveness within the financial industry.]]>
