Generally, Kotak credit card reward points can be redeemed in the ratio of 4:1. So, take that into consideration, Zen Signature offers up to 1.67% value-back through its rewards program which is quite low for a card that charges an annual fee of Rs. 1,500. The base rewards rate takes the savings even lower to just 0.83%. When compared with other rewards credit cards with similar annual fees like Axis Rewards, HDFC Regalia Gold, etc., this reward savings rate falls quite short.