Islamic Banking Explained: How Halal Finance Works

Islamic banking is banking run under Sharia principles: no interest (riba) charged or paid, no excessive uncertainty in contracts (gharar), no speculation (maisir), and no financing of prohibited industries. Instead of lending money at interest, an Islamic bank buys and resells assets at a disclosed markup, leases them, or enters partnerships that share profit and loss. Anyone can use it, Muslim or not, and in most countries an Islamic bank's deposits are covered by the same deposit-insurance scheme as a conventional bank's. The Islamic Financial Services Board's 2026 stability report puts the global Islamic financial services industry at USD 4.4 trillion of total assets in 2025, with outstanding sukuk passing USD 1 trillion.

Below: how the main contracts work with worked numbers, how deposit protection applies, what the industry's own standard-setter says about products that drift towards conventional lending, and how to choose a provider.

The Four Prohibitions

1. Riba (interest) — Banks cannot charge or pay interest. Returns come from trade, leasing or shared profit instead.
2. Gharar (excessive uncertainty) — Contracts must be clear about what is being sold, for how much and when.
3. Maisir (speculation) — Transactions that amount to gambling on outcomes are excluded.
4. Prohibited industries — No financing of alcohol, gambling, pork or similar activities.

How the Main Contracts Work, With Numbers

The figures in this section are hypothetical, chosen to show the mechanics; they are not any bank's pricing.

Murabaha (cost-plus sale). The bank buys the asset and sells it to you at a price agreed in advance, payable in instalments. Example: a car costs 20,000. The bank buys it and sells it to you for 22,000, payable over 36 months. Your instalment is 22,000 / 36 = 611.11 a month, and the total you will pay, 22,000, is fixed on the day you sign. The 2,000 is the bank's profit on a sale, not interest on a loan, and it does not rise if market rates rise.

Ijara (lease). The bank owns the asset and leases it to you for rent, often with ownership transferring at the end. Because the bank owns the asset during the lease, it carries the risks of ownership that a lender would not.

Diminishing musharaka (shared ownership, common for homes). You and the bank buy the property together and you gradually buy out the bank's share while paying rent on the part it still owns. Example: a 300,000 home, you contribute 60,000 (20%) and the bank 240,000 (80%). If rent on the bank's share is set at 5% a year, the first month's rent is 240,000 x 5% / 12 = 1,000. Each time you buy another slice of the bank's share, its ownership falls and so does the rent. After you have bought 120,000 of its share, the bank owns 120,000 and the monthly rent at the same rate is 120,000 x 5% / 12 = 500.

Sukuk (asset-backed certificates). Often called Islamic bonds, sukuk represent ownership in an underlying asset or venture and pay returns from its earnings. The IFSB reports the sukuk market at USD 1.10 trillion outstanding in 2025.

"Interest by Another Name?" What the Standard-Setter Says

A fair question is whether a fixed markup is simply interest relabelled. The structural difference is real: in a murabaha the bank owns the asset before selling it, and in ijara and musharaka it carries ownership risk. But the industry's own standard-setter is candid that the line can blur. The IFSB's 2026 Islamic Financial Stability Report is themed on "hybrid risks", which it describes as arising when Islamic products or models replicate conventional credit-like exposures, and it calls for prudential frameworks to address them.

The practical takeaway for a customer is to look at the substance of a contract, not the label: who owns the asset and when, what happens if it is damaged or lost, and whether payments can change.

Deposit Protection for Islamic Accounts

An Islamic bank's deposits are usually covered by the national scheme on the same terms as conventional deposits, and some schemes treat them separately. Malaysia is the clearest example. Its deposit insurer, PIDM, states in its handbook that eligible deposits are protected up to RM250,000 per depositor per member bank, including the return, and that "The limit also applies separately to Islamic and conventional deposits."

Two worked examples using PIDM's rules:

• RM300,000 in Islamic deposits at one member bank. RM250,000 is protected; RM300,000 - RM250,000 = RM50,000 is not.
• RM250,000 in Islamic deposits and RM250,000 in conventional deposits at the same bank. Because the limits apply separately, the whole RM500,000 is protected.

PIDM also states that foreign-currency and ringgit deposits at the same member bank are added together under the single RM250,000 limit. In other countries the rules differ, so check the scheme where your bank is licensed; our guide to whether neobanks are safe explains how to read a provider's licence.

The Largest Islamic Bank by Its Own Figures

Saudi Arabia's Al Rajhi Bank reported total assets of SAR 1,043 billion at 31 December 2025, up 7.3% on the year, in its fourth-quarter 2025 earnings release (27 January 2026). It offers retail and corporate Islamic banking in its home market. Size is not a reason to choose a bank, though: what matters for a customer is availability where you live, the contracts on offer and the deposit protection that applies. For the wider region, see best banks in Asia Pacific.

Islamic and Conventional Banking Side by Side

For how banks of either kind earn money, see how neobanks make money.

How to Choose a Sharia-Compliant Provider

1. Check the Sharia supervisory board. A credible board that approves each product is what separates genuine compliance from marketing.
2. Read the contract type for each product. Ask whether your home finance is musharaka or ijara, and who owns the property during the term.
3. Check what happens to payments. A murabaha price is fixed at signing; rent under ijara or musharaka may be reviewed, so read how.
4. Confirm deposit protection. Check the scheme where the bank is licensed and whether Islamic deposits have their own limit.
5. Compare the ordinary things too. Fees, service and the app matter as much as at any bank.

Customers drawn by the ethical exclusions rather than faith can apply the same checks; Islamic banking sits alongside other values-led options such as the sustainability focus in our bunq review. For how digital tools are changing all of banking, see how AI is changing banking.

Frequently Asked Questions

What is Islamic banking?

Banking that follows Sharia principles: no interest, no excessive uncertainty, no speculation and no financing of prohibited industries. Banks earn through sales at a disclosed markup, leasing and profit-sharing partnerships instead.

Can non-Muslims use Islamic banks?

Yes. Islamic banks serve anyone, and some non-Muslim customers choose them for the ethical exclusions and asset-backed structures.

Is a murabaha markup the same as interest?

Structurally no: the bank buys the asset and resells it at a price fixed in advance, so the total cost does not change with market rates. The IFSB has nonetheless warned about products that replicate conventional credit-like exposures, so judge each contract on its substance.

Are Islamic bank deposits protected?

Usually by the same national scheme as conventional deposits. In Malaysia, PIDM protects up to RM250,000 per depositor per member bank, with a separate limit for Islamic and conventional deposits.

How big is Islamic finance?

The IFSB's 2026 report puts the global Islamic financial services industry at USD 4.4 trillion of total assets in 2025, with outstanding sukuk above USD 1 trillion.

This is general information, not religious or financial advice. Whether a product is compliant is a matter for qualified scholars and the provider's Sharia board, and deposit protection depends on where the bank is licensed.