Understanding Riba: Why interest is prohibited

Frequently translated as “interest”, Riba is often presented as the single feature that distinguishes Islamic finance from conventional banking. This fails to capture its broader significance. The prohibition of Riba is not merely a restriction on one form of financial return; it is part of a wider philosophy that seeks to ensure wealth is created through genuine economic activity rather than through the passage of time alone.

The Holy Quran and the Sunnah of the Prophet Muhammad (peace be upon him) regard Riba as a concept that is incompatible with the principles of justice and fairness that underpin financial  transactions, and these principles have been upheld by Muslim jurists for centuries. The classical scholars discussed various forms of Riba, and all these forms are still related to modern Islamic banking one way or another. One of the most common forms encountered in modern banking is to charge interest on loans and other debt obligations. The concern is that money, in itself, should not become a commodity that generates guaranteed returns without participating in productive economic activity or assuming commercial risk.

This distinction explains why Islamic banks do not simply replace the word “interest” with the word “profit”. The difference is far more fundamental. In a conventional loan, money is advanced to a borrower with an obligation to repay a larger amount after a specified period. The lender’s return arises solely from the lending of money.

Islamic banking approaches financing differently. Instead of extending an interest-bearing loan, the bank enters into a Shari’a-compliant financial transaction. It may purchase an asset and sell it to the customer at a disclosed and agreed price under a Murabaha contract. It may acquire an asset and lease it under an Ijarah arrangement. It may invest alongside the customer through a Musharaka partnership or provide capital under a Mudaraba investment agreement based on profit-sharing principles. In every case, the return is linked to a legitimate financial contract rather than to the lending of money itself.

However, customers should not expect Islamic financing to be cheaper simply because “interest” is prohibited. The pricing may often be comparable, but the legal basis of the transaction is fundamentally different.

The prohibition of Riba also influences how Islamic banks deal with financial distress. Once a financing agreement has been concluded, Shari’a prohibits the amount owed from increasing merely because payment is delayed. The UAE’s Commercial Transactions Law reinforces this principle by expressly prohibiting borrowing or lending on interest for Islamic financial institutions and by preventing any increase in the customer’s financial obligation solely because of late payment. In doing so, the law gives statutory recognition to one of the industry’s most fundamental Shari’a principles.

In Shari’a and law, the structure of a transaction is not an incidental detail; it defines the rights, obligations, and responsibilities of the contracting parties. A sale, a lease, and a partnership are not different labels for the same contract; they are legally distinct commercial relationships with different risks, ownership arrangements, and remedies.

Ultimately, the prohibition of Riba forms a part of a broader Shari’a vision of finance. It encourages transactions rooted in trade, investment, and productive enterprise, promotes greater contractual transparency, and seeks to balance commercial success with ethical responsibility and adherence to Shari’a principles.