What Is a Sharia Bank? Understanding Its Operational System

The question “What is the difference between a Sharia bank and a conventional bank?” may have crossed many people’s minds. A common answer is, “Sharia banks do not use interest.” While this is true, the differences between Sharia and conventional banks extend far beyond the matter of interest. Amidst growing public awareness of the need for a fairer and more transparent financial system, Sharia banks are gaining increasing attention, not only from the Muslim community but also from those seeking financial alternatives that prioritise ethical transactions. According to data from the Financial Services Authority (OJK), the Sharia banking industry in Indonesia has shown consistent year-on-year growth, proving that the system is increasingly accepted as a vital part of the national financial landscape.

So, how exactly does a Sharia bank work? Why does it not use interest? Where does the bank derive its profit? And what makes its operational system different? A Sharia bank is a financial institution that conducts all its business activities based on Islamic principles. These principles govern not only the prohibition of interest but also mandate that transactions be carried out honestly, transparently, and fairly, providing benefits to all parties involved. In practice, Sharia banks avoid transactions containing riba (usury or additional charges on loans), gharar (uncertainty in a transaction), maysir (speculation or gambling), and financing for businesses that contradict Sharia law, such as gambling or alcohol production. Instead, Sharia banks use contracts, or akad, agreed upon by both parties. These contracts clarify the rights and obligations of the bank and the customer from the outset, minimising the potential for disputes. Notably, Sharia banking services are not exclusively for Muslims; anyone can become a customer, as the system upholds universal values such as honesty, openness, and justice.

At first glance, the offices, ATMs, and mobile banking applications of Sharia banks appear similar to those of conventional banks. However, the underlying mechanisms are fundamentally different. Conventional banks primarily derive profit from the interest paid by debtors on loans; the larger the loan, the greater the interest payable. In contrast, Sharia banks do not use an interest system. Profits are generated through Sharia-compliant mechanisms such as trading (murabahah), business partnerships (mudharabah and musyarakah), leasing (ijarah), and fee-based services. Consequently, the bank’s profit comes from real economic activity rather than from adding a premium to a money loan.

The operational system of a Sharia bank consists of three main activities: collecting funds, distributing funds, and providing services. Firstly, funds are collected from the public through savings, current accounts, and deposits. Using a wadiah contract, a customer entrusts funds to the bank, which is obliged to safeguard the money and return it in full upon request; the bank may provide a discretionary bonus, but this is not promised upfront. Under a mudharabah contract, the customer acts as the fund owner and the bank as the manager, investing the funds in halal and productive sectors, with profits shared according to a pre-agreed ratio. Secondly, the collected funds are distributed to the public through financing. For instance, if a customer wishes to buy a house, the bank purchases the property first and then sells it to the customer at a price that includes an agreed profit margin, with the total price fixed from the start. This is known as a murabahah contract. Other contracts include musyarakah, a partnership where both the bank and the customer contribute capital and share profits according to an agreed ratio, while losses are borne proportionally. For leasing needs, the ijarah contract is used, such as for financing heavy equipment or operational vehicles. Thirdly, Sharia banks provide a full range of modern services, including mobile banking, internet banking, interbank transfers, bill payments, QRIS, and digital payments for zakat, infaq, sadaqah, and waqf, demonstrating their ability to keep pace with technology while adhering to Sharia principles.