AU CS Credit Card vs IDFC First Millennia Card: Which Credit Card Wins in 2026?

Quick Verdict

• For everyday spend on dining and travel, the AU CS Credit Cardⓘ wins with a 2% reward rate, compared to the IDFC First Millennia Card’s standard 0.5%.
• The AU CS Credit Cardⓘ also leads in domestic lounge access, offering 8 visits per year versus 4 with the IDFC First Millennia Card.
• Both cards have zero joining and annual fees, making them equally cheap to hold.
• Choose the AU CS Credit Cardⓘ if you prioritize rewards on dining, travel, and lounge access; pick the IDFC First Millennia Card if you want a simple lifetime-free card with welcome benefits and occasional shopping rewards.

Side by Side

Rewards Compared

The AU CS Credit Cardⓘ delivers Rs 50 back on a Rs 10,000 general spend, reflecting its 0.5% base reward rate. However, it shines in specific categories with a 2% return on dining and travel spend, offering Rs 200 on every Rs 10,000 spent there. Utilities and insurance spend reward at 0.25%, or Rs 25 per Rs 10,000. This tiered approach benefits users who regularly dine out or travel, maximizing their rewards.

In contrast, the IDFC First Millennia Cardⓘ provides a flat 0.5% return across all spends, equating to Rs 50 per Rs 10,000. While it lacks category-specific boosts, it compensates with a welcome benefit: 5% cashback on the first EMI spend up to Rs 1,000 and gift vouchers worth Rs 500 for spending Rs 5,000 within 30 days. This makes it attractive for first-time cardholders or those seeking simple, predictable rewards without category restrictions.

Fees Compared

Both cards have no joining or annual fees, making them easy to hold indefinitely without cost concerns. The AU CS Credit Cardⓘ requires no minimum spend for fee waiver since it charges no fees at all. Similarly, the IDFC First Millennia Cardⓘ is also fee-free with no waiver conditions. Thus, there is no break-even needed on spend to justify fees, giving both cards an edge for cost-conscious users.

Which One Should You Pick

Choose the AU CS Credit Cardⓘ if you frequently spend on dining and travel categories and value more domestic lounge visits. Its higher category reward rates and 8 complimentary lounge accesses annually suit regular travelers and foodies who want to maximize their returns without paying fees. However, it is less ideal if your spend is mostly outside these categories or if you do significant foreign currency transactions, despite its relatively low forex markup.

The IDFC First Millennia Cardⓘ is best for beginners or occasional spenders who want a straightforward, no-fee card with guaranteed flat rewards. Plus, its welcome benefits add value early on. It suits those focused on shopping and who do not prioritize lounge access or specialized category rewards. However, its higher 3.5% forex markup makes it expensive for international use, and the monthly Rs 20,000 spend gate to access lounges restricts flexibility.

In conclusion, pick the AU CS Credit Cardⓘ for category rewards and lounge access with low forex costs, and the IDFC First Millennia Card for simple, no-fee usage and welcome perks. Those who rarely dine out or travel should skip the AU CS in favor of the IDFC card, while heavy travelers or dining spenders should avoid the IDFC card due to limited rewards and lounge benefits.

What to Check Before You Apply

• Check if your typical spend falls into the AU CS Credit Card’s higher reward categories to benefit fully.
• Confirm the redemption options and value of points earned, especially since reward types are points for both cards.
• For the IDFC First Millennia Card, verify how the Rs 20,000 monthly spend gate affects lounge access eligibility.
• Consider the impact of forex markups if you travel internationally or shop in foreign currency.

FAQ