Is working in an institution that benefits from usury permissible, or is the money of everyone who works in governments with usurious banks unlawful, based on fatwa number (10200) which states: "Usury is forbidden to the individual, society, and the state, and any gains derived from usury are unlawful money that must be disposed of. However, whoever works for a government institution that invests its money in usurious banks, and his work is permissible, then there is no harm for him to take his salary from that institution, because it is wages in exchange for his permissible work"?

It is forbidden to work for usurious institutions in the field of usury, due to the saying of the Prophet, peace and blessings be upon him: "Allah has cursed the one who consumes Riba (usury), the one who pays it, its two witnesses, and its scribe," and he added, "they are all equal." And due to the saying of Allah Almighty: "And cooperate in righteousness and piety, but do not cooperate in sin and aggression."

As for working for them in fields other than usury, it is permissible according to the Hanafis and some Malikis and Hanbalis. They stipulated that the halal (lawful) money must be predominant; however, if the haram (unlawful) money is predominant, then it is forbidden. The Shafi'is and a view in the Hanbali school hold it to be disliked (makrooh) rather than forbidden. The evidence for this is that the basic principle in financial dealings is permissibility, and prohibition is not established merely by probability. If halal mixes with haram, the money becomes common and ambiguous. Moreover, the Prophet, peace and blessings be upon him, dealt with polytheists despite the presence of usury in their wealth.