Toward the development of an Islamic banking sustainability performance index

Purpose - The purpose of this paper is to suggest a model that yields a sustainability performance index for Islamic banks (IBs). This index is expected to account for stakeholders’ viewpoints while considering sustainability and Maqasid Al-Shariah as bases. Design/methodology/approach - First, based on the relevant literature review refined through consultations with academic, banking and Shariah experts, the main stakeholders and their corresponding lists of relevant attributes and sub-attributes are identified. Then, adopting a multi-attribute utility approach and based on a second step of interviews with experts, an aggregated index is suggested. Finally, the developed index is applied to five famous Islamic banking groups over the period 2005–2019. Findings - Empirical evidence shows that the banks used in the implementation do not achieve high scores of the suggested index. This can be interpreted through a lack of Islamic normative aspects and low adherence to sustainability practices. Specifically, they are not functioning on a justice basis and are deficient in providing sufficient varieties of Islamic products. They are also more interested in economic sustainability and are not involved in environmental and social ones. Originality/value - The developed index not only considers the compliance of the banking activities with Shariah, but it also addresses their sustainability from the main stakeholders’ perspectives. The suggested model provides a transparent performance evaluation tool for IBs omitting all causes of conflict of interests and certifies the fairness of the resulting assessments.