Zakat on Fixed Deposit Amount.
Depositing money in a bank as a fixed deposit falls under the category of a strong debt (Dain-e-Qawi). When the full amount is received after the specified period has passed, Zakat will be obligatory on the original deposited amount for every year. However, the extra amount received is interest and is absolutely Haram (forbidden); Zakat is not obligatory on it. (Kitab al-Nawazil / Vol: 6 / Page: 472)