In the question mentioned above, you will have to pay Zakah if you own an amount more than the amount you have to pay to the bank within one year if it reaches up to nisab i.e. 52.5 tola silver and one year passes over it, otherwise not. The quantity of Zakah is 2.5% i.e. 2.5 rupees out of one hundred rupees.
Allah (Subhana Wa Ta’ala) knows Best
Darul Uloom Deoband