Is it permissible for a Muslim to partner with a polytheist in business if all the polytheist's money comes from usury and this partnership is in lawful goods?
It is better for a Muslim to choose a trustworthy Muslim partner so that the business may be blessed. It is disliked to partner with a disbeliever or someone who does not avoid the unlawful. If a Muslim partners with a disbeliever, it is stipulated that the disbeliever should not act independently and that all of his money should not be unlawful, because it is impermissible to deal with someone whose entire wealth is unlawful, whether through buying, selling, or partnership. As long as all the money of this polytheist is unlawful, it is not permissible for this merchant to partner with him.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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