<![CDATA[Sustainability reporting has become an important instrument for enhancing corporate transparency and accountability, particularly in the banking sector. However, empirical evidence regarding its relationship with financial performance remains inconclusive, especially among regional government-owned banks. This study aims to examine the relationship between the Sustainability Report Disclosure Index (SRDI) and the financial performance of Regional Development Banks (Bank Pembangunan Daerah) in Indonesia during the 2021–2025 period. The study employed a quantitative approach using secondary data obtained from annual reports and sustainability reports. The sample comprised 17 Regional Development Banks selected through purposive sampling, resulting in 85 firm-year observations. Sustainability reporting was measured using the SRDI based on the Global Reporting Initiative (GRI) Standards 2021, while financial performance was measured using Return on Assets (ROA), Return on Equity (ROE), Non-Performing Loans (NPL), Operating Expenses to Operating Income (BOPO), and Capital Adequacy Ratio (CAR). The data were analyzed using panel data regression with Leverage and Firm Size included as control variables. The results indicate that SRDI is positively and significantly associated with ROA and ROE, while it is negatively and significantly associated with NPL. However, no significant relationship is found between SRDI and BOPO or CAR. These findings suggest that sustainability reporting is associated with selected dimensions of financial performance but does not demonstrate a consistent relationship across all financial performance indicators. This study contributes to the limited empirical evidence on sustainability reporting in regional government-owned banks and provides insights for bank management and regulators in evaluating sustainability disclosure practices.]]>
