Building a mobile or web application for a conventional bank is assessed by the features you build, not by the client's name. Screens that let a customer view a balance, send a transfer, freeze a card, find a branch or download a statement are ordinary financial utility and are generally permissible. Screens that originate a loan, display an interest rate or pre-approved credit offer, compute an EMI schedule, or market an interest-bearing product are part of the riba mechanism and are treated the way any facilitation of interest is treated. For a freelancer or agency this is often easier to control than for an employee, because you can scope the contract to exclude lending features before signing rather than negotiating out of them afterwards.
Current direction: Needs Scholar Review. This page needs a qualified scholar to verify the exact ruling before a reader relies on it.
Educational guidance only, not a fatwa. Consult a qualified scholar for your specific case. Page created July 15, 2026.
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The underlying analysis is identical - what you build is what is assessed. The practical difference is control. A freelancer or agency negotiates scope before signing and can simply decline the lending modules, whereas an employee is generally assigned work and must negotiate reassignment afterwards. This makes the contract route easier to keep clean, provided you scope it at proposal stage rather than after signing.
If it computes instalments on an interest-bearing loan, yes - it is a tool whose only function is to present and facilitate the riba contract, which is close to the recording function the narration describes. A calculator for a genuinely interest-free instalment arrangement, or a savings goal calculator, is a different thing. The underlying financial product decides it, not the word calculator.
Islam treats contractual obligations as binding, and breaking a valid commitment carries its own weight. Most scholars would advise honouring the existing obligation, minimising further involvement where the contract allows, not renewing or extending, and scoping future engagements correctly. Some would advise seeking a mutual variation with the client if that is realistically possible without breach - many clients will agree to a scope change.
Same technical work, permissible product
Islamic banks, takaful operators and Islamic investment platforms all need mobile and web application development, and your conventional banking experience is directly relevant. For a freelancer this is a client-list change rather than a career change.
Confirm the institution has an independent Shariah supervisory board before taking the engagement.
Evidence used to explain the general principle. These references do not replace personal scholar review.
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