Is Zakat due on investment certificates (Group B) on the principal or on the resulting profit, and what is the difference between them and a house in terms of Zakat obligation?

The aforementioned investment certificates are forbidden, and the money must be withdrawn immediately. If any interest has been given, it must be disposed of by spending it on charitable causes. Zakat is obligatory only on the principal amount. As for the forbidden interest, all of it must be spent on charitable causes. A house acquired for personal use differs from an investment certificate; Zakat is obligatory on the investment certificate itself because it is a growing asset, whereas Zakat is not obligatory on a house unless it is for trade, in which case it is appraised, and its Zakat is paid like trade goods.