Sharing an interesting observation.
For sbi card if your current outstanding balance is in negative 90-95% of txn, i.e. prepaid more than the enough amount in advance at the time of giving otp doing an emi txn, they will only make emi on that small part which you can ask to advanced foreclosure the extra fee would be minimal.
Example
credit limit 50k, current outstanding 0
pay bill of 40k, current outstanding -40k
do emi txn of principal value 41k,
sbi will process the emi on outstanding 1k only, which can be closed by paying fees. Total extra expenses <= 500₹, plus can also pocket the no cost emi discount :)
I've done this few times, it worked perfectly.