This study aimed to analyzes and compares the level of Islamic Social Reporting (ISR) disclosure between two major Islamic banks in Indonesia—Bank Syariah Indonesia (BSI) and Bank Muamalat Indonesia (BMI)—from 2021 to 2024. The comparison is framed within the Shariah Enterprise Theory (SET) to evaluate the implementation of sharia-based governance and maqāṣid al-syarī'ah values in their social reporting practices. Using a descriptive-comparative approach, ISR disclosure is measured across six dimensions comprising 23 items, based on content analysis of annual and sustainability reports. BSI consistently achieved 100% ISR disclosure throughout the period, while BMI improved from 91.3% in 2021 to 95.6% from 2022 to 2024. The main gaps for BMI were in environmental disclosure and structured sharia compliance reporting. The study reveals that: (1) ISR disclosure levels reflect the maturity of sharia governance structures, with BSI’s post-merger integration enabling full compliance; (2) Environmental and independent sharia audit aspects remain the weakest dimensions of ISR in Indonesian Islamic banking; (3) High ISR disclosure correlates with institutional credibility, yet completeness does not necessarily guarantee substantive accountability. Implication: High ISR disclosure reflects stronger sharia governance and transparency. However, beyond completeness, the quality and substance of disclosures—particularly in environmental accountability and independent sharia auditing—require emphasis. Regulators should refine ISR frameworks to distinguish genuine sharia accountability from mere administrative compliance, promoting substantive transparency in Islamic banking.
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