Riba means any surplus obtained without a legitimate counter-value in a loan or exchange: an extra amount demanded in return for time on a debt, or an unequal quantity between two goods of the same kind exchanged, both forms being prohibited by Sharia.
What the word riba actually covers
In Arabic, riba means increase. Jurists apply it to any benefit stipulated for the creditor that matches no work, no risk and no delivery of an asset. The amount is irrelevant: a 1 % surcharge is caught just as much as a usurious rate.
Riba al-nasi'a, charging for time on a debt
This is the most common form: lending 1,000 and demanding 1,050 a year later because the money was tied up. Conventional bank interest falls into this category, whether fixed or floating, simple or compound, paid upfront or at maturity.
Pay or increase: the practice targeted by the Quran
In pre-Islamic Arabia, a creditor would offer a defaulting debtor, at maturity, either to settle or to see the debt raised in exchange for more time. This spiral, known as riba al-jahiliya, is the direct target of the verses forbidding riba.
Riba al-fadl, unequal swaps of identical goods
A hadith names six goods, gold, silver, wheat, barley, dates and salt, which must be exchanged in equal quantity and hand to hand when of the same kind. Swapping 1 kg of ordinary dates for 800 g of premium dates is therefore forbidden.
Why bank interest is treated as riba
The International Islamic Fiqh Academy and most Sharia boards hold that any interest on a monetary loan is riba. A few writers have argued for a distinction between usury and moderate interest, but that view remains a minority one in institutional Islamic finance.
Lending money or selling an asset: where is the line?
A cash loan may only return the principal. A sale, however, may include a profit, even when paid later. Riba-free credit therefore changes the transaction: the bank no longer advances a sum, it sells or leases an asset it has actually acquired.
When fees hide interest
Arrangement fees calculated as a percentage of the amount and term, or a monthly charge with no matching service, can bring riba back in. Standards only accept flat fees reflecting a real cost, such as processing the application or registration.
Late penalties and indexation: clauses to reread
A penalty paid to the creditor and growing with the delay reproduces default interest. The accepted alternative is an undertaking to pay a sum to charity. Likewise, indexing a monetary debt to inflation is rejected by most Sharia bodies.
Four questions to test a credit offer
Does the bank own the asset before selling or leasing it? Is the total price fixed at signing? Does the debt stay unchanged if payment is late? Has a named Sharia board approved the contract? Any negative answer calls for an explanation.
A market rate used only as a benchmark
Many Islamic banks set their margin by reference to an index such as SONIA or Euribor. Most scholars accept this, because the index only helps calculate a price fixed once and for all, without creating a debt that grows over time.
What the Sharia board and audit actually do
The Sharia board approves the documentation before a product is launched, then an audit checks that real transactions follow it: actual purchase of the asset, order of signatures, use of penalties. Asking for the product's written opinion, or fatwa, is reasonable.
Supervision identical to that of other banks
In the United Kingdom, Islamic banks follow the same prudential and consumer-protection rules as conventional banks. The authorities do not rule on the religious compliance of products, which rests entirely with each institution's Sharia board.
Specialist external source
The Bank of England explains in plain terms what Islamic finance is, why interest is excluded and how British Islamic banks fit within ordinary regulation.