If you choose to auto-renew, Federal Bank via Fi will take the amount accrued (principal + interest) at the time of maturity and create a new FD, using it as principal for the same time as the previous one.
Here is an example: Suppose you open a Fixed Deposit worth ₹1 lakh. Duration: 1 year.
Then, your applicable interest rate becomes 5.1%, and you earn approximately ₹5,198 as interest.
If auto-renewed, it will reinvest ₹1,05,198 in a new Fixed Deposit for a 1-year duration.
If you need help, chat instantly with Fi's customer care team here.