It is a legally prescribed right for the poor in the properties of the rich which the rich give as an act of worship to Allaah The Almighty in their due times.
Zakaah is obligatory upon the Muslim individual regarding his owned property that reached the minimum amount liable for Zakaah and a complete year passed on it.
The completion of a year remains stipulated with regard to money, cattle and trading commodities. As for what is produced from the land, Zakaah is entitled upon it whenever it is harvested. Thus, the lapse of a year is irrelevant for it. As for the offspring of cattle liable to Zakaah and the profit gained in trade, the lapse of the year is to be counted with regard to the original capital. Thus, it is not necessary that a complete year passes on the offspring of the cattle or the profit if their original capital has reached the Nisaab (i.e. the minimum amount liable for Zakaah.
As for the creditor of an insolvent person, the creditor is to pay the due Zakaah of the debt when he receives it in case the debt has remained for a whole year with the indebt. However, when being the creditor of a rich solvent person, the creditor is to pay Zakaah due upon this property each year.
Moreover, no Zakaah is due upon any property set for possession or usage such as one’s dwelling house, clothes, the furniture, the vehicles and the animals prepared for riding and usage.
As for what is set for rent as vehicles, stores and houses, no Zakaah is due upon its original capital but Zakaah is due upon the rent paid for such a property if it reaches the Nisaab alone or by adding it to another estate and a complete year lapses since the time of concluding the contract.
As for the one upon whom Zakaah is obligatory and he dies before paying it, it must be paid for his inheritance and is not annulled by his death.