Is zakah obligatory on prize money, rewards, and salary?

The questioner : The questioner asks: Is it permissible to pay zakah on the following types of wealth? First, money obtained through a prize in a competition. Second, a reward or a financial gift. Third, a large monthly salary of twenty thousand riyals. And if this is permissible, is zakah paid when one intends to keep the money, or when a lunar year has passed over it?

The Shaykh : As for money that comes from a forbidden source, a person is required to dispose of it by giving it to the one who is entitled to it. For example, if a person takes money as a bribe—meaning someone comes to him to get his needs met by the state, but he does not do so unless money is paid—then this money is forbidden for him, and he must return it to the one from whom he took it, because he took it without right. However, if the money came through a forbidden means but with the consent of its owner, such as if the money came through riba (usury or interest), then he must give this riba money in charity if it is not possible to return it to its owner. He gives it in charity to dispose of it, not to draw near to Allah with it. But if it is possible to return it to its owner, he must return it to its owner, based on the saying of Allah the Exalted: .
As for money that comes as a reward or a financial gift, as the questioner says, this money is examined: if it is dirhams, gold, or silver, then zakah is obligatory on it when a lunar year has passed over it. But if it is not gold, silver, or silver dirhams, but rather paper money, then there is no zakah on it unless the person who received it had prepared it for trade. If he received it and prepared it for trade, then he must pay zakah on it as zakah on trade goods.
Likewise, zakah is obligatory on a large or small monthly salary. However, it is not obligatory until a lunar year has passed over it. If a person pays it out and spends it before the completion of the lunar year, then he owes no zakah on it.