1. Is it permissible for the son to pay the father's Zakat al-Mal (obligatory charity on wealth) from his own money, even if the father is financially capable? 2. How is Zakat calculated for land whose value has not been known for the past five years? 3. How is Zakat paid on shares that do not yield profits?

There is no objection to a son giving his father's Zakat from his own money, provided the father gives permission, as intention is a prerequisite for Zakat. Land is not subject to Zakat unless it is a trade commodity, in which case it is valued, and a quarter of one-tenth of its value is paid as Zakat each year. If it is difficult to determine its value for past years, the one paying Zakat should make an earnest effort and strive to ascertain what would clear his conscience. The Zakat on shares varies depending on their type.