Do I Owe Zakat Money I am Safekeeping for My Brother?

No, you do not owe Zakat money that you are safekeeping for your brother. 

Zakat is only due to wealth that you own and control.

The following are the key points to remember:

• Zakat is only obligatory on owned wealth – If the money belongs to your brother, it remains his responsibility, not yours.
• Ownership and control matter – You are simply a custodian and do not have the authority to use or spend this money as you wish.
• Zakat is due to the rightful owner – If your brother’s wealth reaches the nisab of Zakat and remains with him for a lunar year, he is responsible for paying it.
• Your role is safekeeping – Since you do not own the money, you are not liable for its Zakat payment.
• You can guide your brother. If he needs assistance calculating Zakat or understanding his obligations, you can help him fulfill his duty.

Thus, you do not owe Zakat money that belongs to someone else, even if you are safeguarding it. Zakat is only required on wealth that you own and control. If your brother's savings qualify for Zakat, he must pay it.

And Allah knows best!