Praise be to Allaah.
This money is regarded as belonging to him and comes under
the same ruling as the rest of his money. Zakaah is due on it if one full
hijri year has passed since he took it from the bank, if it met the minimum
threshold (nisaab) by itself or when added to whatever he had of other money
and profits.
And Allaah is the source of strength, may Allaah send
blessings and peace upon our Prophet Muhammad and his family and Companions. End quote.
Fataawa al-Lajnah al-Daa’imah li’l-Buhooth al-‘Ilmiyyah wa’l-Ifta’ (9/316).