HDFC:
Most of us know that the best way to pay Bills for the Credit Card is the HDFC Bill Pay Portal, it allows us 1% reward rate for max 750 per month.
A person has to use the HDFC Bill pay portal via Netbanking/Mobile Banking for the same. (Using Easyshop Platinum Debit Card)
IndusInd:
The second best way is premium Indusind Debit Cards, i.e., Select/Exclusive Debit Card, it offers upto 0.93% reward rate and could be beneficial for those who frequently exhaust the HDFC limit,
Note: Paytm does not accept the mastercard variant of these cards, so in my experience Mobikwik does and gives the reward. For Visa Variant, paytm would work.
Unlike HDFC, Indusind offers incremental rewards for Credit Card payment, the rewards you get are (Brackets for total monthly spend):
Spend 5k - 0.35% - Rs 17
Spend 10k - 0.43% - Rs 43
Spend 20k - 0.56% - Rs 112
Spend 30k - 0.67% - Rs 201
Spend 40k - 0.72% - Rs 288
Spend 50k - 0.78% - Rs 390
Spend 60k - 0.83% - Rs 500
Spend 80k - 0.88% - Rs 704
Spend 100k - 0.92% - Rs 920
Spend 112.5k (Max) - 0.93% - Rs 1050
Here the max limit for Cashback is Rs 1050 a month as a person can get max 3000 reward points (1 RP= Rs 0.35)