Working at an agency, consultancy or services firm that has some clients in prohibited industries is generally permissible when your own work is not on those accounts and they are a minority of the firm's business. Scholars assess three things: whether you personally work on the prohibited account, what proportion of the firm's revenue comes from such clients, and whether the service you provide directly promotes the prohibited activity or is generic professional work. Designing a beer brand's advertising campaign is direct promotion; auditing the same company's payroll compliance is not. The practical step most people can take is to ask to be staffed off those accounts, which in a large firm is usually an unremarkable request that partners accommodate for all sorts of reasons.
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Educational guidance only, not a fatwa. Consult a qualified scholar for your specific case. Page created July 15, 2026.
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Generally not, where the client is a minority of the firm's business and you do not work on that account. Your salary is drawn from a revenue pool that is predominantly lawful, and the mixed-wealth principle applies. Cooperation in sin implies participation - you cannot meaningfully be said to be cooperating in a business whose file you have never opened.
No, and this is the distinction that matters most. Advertising exists to sell more of the product - it directly increases the prohibited activity. A statutory audit exists to verify that financial statements are accurate; it is a compliance function that does not promote consumption and would be required of the company regardless. Most scholars treat these very differently even though both are professional services to the same client.
Your position is materially different. Partners share in the decision to accept clients and in the profits from every engagement including the prohibited ones. That is participation in the firm's choices rather than performance of assigned work. Partners with influence over client selection also have the ability to change the firm's policy, which brings a responsibility employees do not carry.
The step most people can take without changing jobs
In agencies and consultancies, staffing rotates constantly. Asking to be kept off particular accounts, framed as a sector preference, is usually accommodated without difficulty and resolves the issue entirely for most employees.
Raise it before the next staffing cycle rather than withdrawing from a live engagement.
Evidence used to explain the general principle. These references do not replace personal scholar review.
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