Answer:
(Fatwa: 1692/1219/L=1431)
The 3.5% extra amount that the bank gives is interest. It is not lawful to use it for oneself. This amount should be given in charity to the poor and needy ones without the intention of reward.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
