If a person pays monthly Chanda Hissa Amad on their income, and from that same income builds property, must Hissa Jaidad also be paid on that property? Would Wasiyyat then be paid twice on the same income?

This question was presented to Hazrat Musleh-e-Maud (ra), whose answer was as follows:

“Yes, it should be paid. The Wasiyyat is, in essence, to be paid after death from whatever one leaves behind. When a person saves money from his income and builds property with it — if, instead of the property, he had invested it in some other work, then whatever income came from it, he would pay Hissa Wasiyyat from that. So when he spends money on property, why should he not pay the portion from it, since it is property that has been created? If a person owns ten ghumaon (a unit of land) of land, and after giving one ghumaon in Wasiyyat, he accumulates some money from the income of the remaining land, which is assessed after his death, then Hissa Wasiyyat must be paid on that as well.”