This paper aims to investigate Islamic banking performance based on higher ethical objectives enshrined within Sharī'ah (Islamic legal rulings); namely, Maqās id al-Sharī'ah. First, we examine the importance of both ethical and social concerns on bank performance in general. Second, we analyse the ethical and social performance of Islamic banks (IBs) based on the Maqās id al-Sharī'ah Index (MSI) that emphasises disclosures related to education, social justice, and redistribution of wealth. Third, we investigate how far IBs have gone towards achieving Maqās id al-Sharī'ah goals during the last decade, post-global financial crises (GFC) period, with a particular focus on Indonesia as a case study. Hence, testing whether IBs achieve socioeconomic justice and attain best practice by securing social good. The selected banks' annual reports were examined, applying content analysis to obtain the necessary data, using the Simple Additive Weighting (SAW) method to determine the level of Maqās id in the sample. Empirical evidence suggests that conventional performance measurements do not truly reflect IBs' higher ethical objectives, and create a deficiency of attaining Maqās id al-Sharī'ah performance in these banks. This research extends the previous literature on evaluating the performance of IBs beyond the financial return, which includes their ethical and social identity based on the Maqās id al-Sharī'ah scale, especially the post-GFC period. The result also reveals that there is a financial cost to achieving the Maqās id al-Sharī'ah, as IBs that achieved high MSI scores have sacrificed financially. This supports the findings of the literature that IBs prefer financial returns over their ethical and social impact.