Is Zakat due on money saved from a monthly allowance sent by the father, and upon which a year has passed?

If the money sent to you by your father is for your ownership, then Zakat is obligatory upon you if it reaches the nisab and a full year has passed over it (85 grams of gold or 595 grams of silver), and its amount is one-quarter of one-tenth (2.5%). However, if the money is only for your utilization and the remainder is held as a trust, then Zakat is obligatory upon your father if his money reaches the nisab. The actual situation is determined by indications, such as your father inquiring about what has been spent or what remains.