To maximize the overall benefits, it is important to consider not just the reward earning and redemption, but also other associated terms and conditions around rewards capping and transaction value.
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The cards come with the following monthly capping:
HDFC Millennia: Maximum 1,000 CashPoints across each cashback category
HDFC MoneyBack+: Maximum 2,500 CashPoints on accelerated category
Basis the highest redemption value offered on the cards, maximum value users can derive in the accelerated category is Rs. 1,000 (2500*1) for HDFC Millennia and Rs. 625 (2,500*0.25) for HDFC MoneyBack+.
Additionally, Minimum transaction values are also applicable. With Millennia Credit Card you can earn CashPoints on transaction value up to Rs. 1,000, but with MoneyBack+ you earn CashPoints on transactions up to Rs. 2,500.
Based on the above conditions, here is how much you need to spend on both cards to earn the maximum value back.
With HDFC Millennia, you should be able to spend around Rs. 20,000 per month across 10 partnered brands- Amazon BookMyShow, Flipkart, Uber, Zomato,Swiggy, Tata Cliq, Cult.fit, Myntra, Sony LIV. But, due to the transaction capping, ensure making 20 transactions of Rs. 1,000 in a month.
With HDFC Moneyback you should be able to spend around Rs. 18,750 across 5 brands- Amazon, BigBasket, Flipkart, Swiggy. But due to transaction capping, ensure spending 7-8 times transaction per month with a value of Rs. 2,500.