Islamic Window

An Islamic window is a part of a conventional financial institution that offers products and services designed to comply with Sharia, Islamic law. A window can take the form of a dedicated division, a network of Islamic branches, or a set of Islamic products sold through the conventional branch network. It is not a separately licensed bank: it operates under the parent's license and balance sheet, but is expected to keep its funds, accounts and decision-making separate from interest-based business and to answer to a Sharia governance structure.

Windows are a common route into Islamic banking for conventional banks, because they allow an institution to serve customers who want Sharia-compliant finance without the cost of capitalizing and licensing a full Islamic subsidiary. They exist in many markets, including Pakistan, Indonesia, Saudi Arabia, the United Arab Emirates, Oman and the United Kingdom.

On the funding side, a window takes deposits on Islamic principles: current accounts usually structured as a qard, a guaranteed loan from the customer to the bank, and investment accounts structured as a mudarabah or wakalah under which customers share in the profits of a defined pool of assets. On the financing side, it offers products such as murabaha cost-plus sales, ijarah leases and diminishing partnership home finance, and it may invest in sukuk rather than conventional bonds.

The core requirement is that money raised under Islamic contracts is invested only in Sharia-compliant assets. A window that allowed its deposits to fund the parent's interest-bearing loans would expose customers to riba. Banks therefore keep separate ledgers, separate pools and, in many jurisdictions, separate financial statements for the window. Income judged to be non-compliant must be removed through income purification, usually by donation to charity.

Most regulators that permit windows require the parent bank to appoint a Sharia supervisory board or committee that approves products and reviews transactions, along with an internal Sharia compliance and audit function. Standards issued by AAOIFI on accounting and governance, and prudential guidance from the Islamic Financial Services Board (IFSB), are used as references. Senior management must also manage Sharia non-compliance risk, the risk that a product or process is later judged invalid and its income must be forgone.

Approaches differ by country. Some regulators license windows explicitly and set detailed rules on fund segregation, capital allocation and disclosure. The State Bank of Pakistan, for example, allows conventional banks to run Islamic banking branches subject to its Sharia governance framework. Malaysia introduced an interest-free banking scheme for conventional banks in 1993, and Bank Negara Malaysia later encouraged the conversion of many windows into separately licensed Islamic subsidiaries.

Other regulators have restricted windows. In 2011 the Qatar Central Bank instructed conventional banks to wind down their Islamic windows, citing difficulties in supervising mixed operations and the risk of commingling funds. In countries without specific Islamic banking law, windows operate under general banking regulation, and product structures must fit ordinary contract, tax and consumer protection rules.

A window shares the parent's capital, liquidity and brand. This keeps costs low and lets the window draw on the parent's systems, but it raises questions about whether customers' funds are truly isolated in a crisis and whether liquidity management, such as overnight placements with the parent, remains compliant. A separately licensed Islamic subsidiary has its own capital and board, which offers clearer segregation and is often preferred as the business grows. Some banks begin with a window and later convert it, while others go further and convert the whole bank to Islamic operation.

Critics argue that windows can reduce Islamic finance to product labeling, with contracts that replicate conventional loans and pricing benchmarked to conventional interest rates. Scholars who apply the objectives of Islamic law, the maqasid al-Sharia, question whether a window changes the substance of the parent's business. Supporters respond that windows have expanded access to Islamic finance for millions of customers, built expertise within large banks and supported the growth of related markets such as takaful.