Islamic finance is often misunderstood, partly because of its limited presence in competitive markets, but mostly because academic and public discussion rarely confronts how Islamic and traditional financial practices actually differ, by the books, both holy and human.
The most commonly cited theory supporting Islamic finance is its religious relevance. Islamic financial contracts are built on profit and loss sharing (PLS) principles. Yet despite its theoretical popularity, PLS has only partially guided Islamic banking in practice, largely because Islamic banks must remain comparable with conventional ones. Over two thirds of global Islamic banking contracts today follow principles that involve no profit sharing at all. Alongside PLS, Islamic finance also promised a system free from interest, excessive risk taking, gambling, and investment in anything impermissible in Islam.
Unfortunately, 70 years of Islamic finance have not resolved the core problem: debt creation. Islam fundamentally opposes debt creation and promotes equity, where partners share profit and loss. Yet most contracts, PLS or otherwise, still create debt directly. Consider a simple car purchase. An Islamic bank, in theory, buys the car and sells or rents it to the customer at cost plus a markup. Where is the partnership when the customer uses the car for personal reasons? One might argue that the transport cost the customer saves is an opportunity benefit that establishes a basis for partnership. But the purchase still leaves the customer in debt, and the markup looks, to many Muslims, uncomfortably like the interest charged by conventional banks.
So, beyond the prohibition of interest, what are the foundational differences between Islamic and conventional finance? Several are codified in the Quran, and they deserve more attention than they get.
(1) SCARCITY AND CHOICE: Traditional economics starts from the century old assumption that resources are scarce, so people must choose carefully according to cost and risk. Islam takes the opposite view. The Almighty controls the supply of resources, which are therefore, theoretically and spiritually, unlimited. People are only custodians. Access to more resources comes by the wish of the Almighty, which follows from prayer, hard work, honesty, and good deeds for oneself, society, and the religion.
Islam also prioritises life here and hereafter, and resources follow that priority. Worldly life is a test; winning the hereafter is the true definition of being resourceful. Put simply, Muslims and non-Muslims are not planning towards the same resources. One is pursuing "eternal richness", the other "purchasing power". This fundamental difference is ignored even in much of the Islamic finance literature.
(2) DEMAND AND SUPPLY: Conventional economics treats these as the first level determinants of most economic outcomes, including prices, inflation, and interest rates. Higher demand and lower supply push prices up, and the free market assumes these forces move without interruption, assisted by randomness, rationality, and an absence of behavioural distortion. In reality, artificial demand push and supply pull can create damaging price volatility.
Islam takes a direct route. Demand and supply are not the primary controllers of prices, and nothing should practically control prices in an Islamic system except genuine societal emergency. Prices should reflect the practical use of resources, the associated cost, and a reasonable profit for the entrepreneur. Because reward hereafter is prioritised over profit herein, an Islamic system should be less costly and less volatile. It discourages rumour and speculation and promotes rationality, which means prices, and the profits earned from price changes, are more disciplined than in the conventional system.
(3) TIME VALUE OF MONEY: In conventional finance, time itself adds value. A longer investment earns more, the argument goes, because longer horizons carry more risk and because people prefer consuming now rather than later. Whole conventional investment philosophies rest on reinvestment: Warren Buffett preached save now, consume later; Jim Simons pursued high frequency trading; both kept reinvestment at the centre.
Islam takes a different path. It would be wrong to say Islam ignores time, since even the value of today's prayers is rewarded here and hereafter. But Islam does not assign additional value simply because an asset sits invested for longer. There must be tangible value addition over time.
Islam prefers tangible, spot transactions; it treats current spending on charity and social causes as an investment in the future; and it attaches value to engagement rather than passive reinvestment. Without tangible change and adequate engagement, long term reinvestment amounts to hoarding. Take a controversial example: someone buys a piece of land and sells it after five years at a fifty percent profit. That gain came through the simple passage of time, not proper engagement. Islam discourages such investment.
(4) ENGAGEMENT: This is the core filtering question for distinguishing Islamic from conventional practice. I am often asked whether investing in an otherwise halal ETF is permissible. My quick answer is another question: have you engaged with that investment? Do you know exactly where the money goes? Do you take a direct role in managing it? If yes, good. If not, consider something that requires direct engagement, such as a small business, the form of enterprise preferred by the Prophet (pbuh) and the Sahaba (may Allah be pleased with them). A conventional fixed deposit involves no engagement; neither does a gain from selling land. The excuse that an agent, a banker or fund manager, engages on our behalf creates a whole set of other problems and does not clear us of the engagement question.
(5) COLLECTIVE INTEREST: This is our ultimate pursuit. If a system keeps producing billionaires while people within the same system starve and register as homeless, there is a wall somewhere in that system. Some cross it through superior skill or access; others wait their whole lives. In pursuit of growth, both Islamic and conventional societies share responsibility for this power distance between rich and poor, and between genders. Conventional finance treats collective interest as an outcome: the rich donate generously after earning big through the system. In Islam, collective interest comes first, before earning begins. Charity is the beginning of the act, not the end, and embedding collective interest is itself charity, leading to higher collective gains, here and hereafter.
The author is a Reader in International Finance at the School of Business Law and Policing at Canterbury Christ Church University, United Kingdom. The views in the article do not necessarily reflect the views of the institutions he is affiliated with.
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