Chapter 8

The cobrand machine

Published 29 September 2026

The 5% cashback on your Amazon card is not a reward. It is a customer-acquisition invoice - and the customer being acquired is you.

Three parties split every co-branded swipe, and each one gets paid before you do. The brand funds the headline rate on its own turf, out of its marketing budget. The bank funds the base rate out of interchange - the merchant fee, roughly 1.5-2% on credit cards in India, which RBI has never capped for credit the way it capped debit in 2017. The network takes its cut off the top. When ICICI's Amazon Pay card pays you 5% on Amazon with Prime, the bank collected a fraction of that on the swipe. The difference is Amazon's money, buying your next order.

You can tell who funds a reward by where it can be spent. Amazon Pay points do not arrive as cash against your statement; they credit into your Amazon Pay balance. The "cashback" cannot leave the platform. That is not a rebate - it is a store credit with a credit line attached, and it works: co-branded cards are now roughly 17% of India's cards, up from a rounding error a decade ago.

Capped, by design

The bank's side of the deal is engineered to never lose. Swiggy's HDFC card advertises 10% inside the Swiggy app - up to ₹1,500 per billing cycle. The party stops at ₹15,000 of monthly food orders. Online categories earn 5%, separately capped at ₹1,500. Everything else earns 1%, capped at ₹500. Flipkart's Axis card pays 5% on Flipkart and Cleartrip, each capped at ₹4,000 per statement quarter. The headline rate is the bait; the cap is the actual product.

For the bank, the machine's real prize is not your spend - it is your acquisition cost. A normal credit card costs thousands of rupees to sell: agents, ads, verification, onboarding. A cobrand card is sold inside an app you already open daily, to a customer whose spending the partner already knows. The brand's checkout page becomes the bank's sales force, and the brand pays for the privilege, because a shopper holding its card is a shopper who does not comparison-shop.

Why the rate is highest where you are weakest

Notice where the big percentages live: exactly the app you were already loyal to. Five percent back on the platform where your address, your cart and your habits already sit. One percent everywhere else - a rate so low it exists mainly to keep the card at the top of your wallet. The economics are blunt: the partner overpays where it wins anyway, and the bank underpays everywhere it might lose. You are steered, and the steering is the point.

None of this is hidden. It is printed in the issuers' own documents, in the caps and the exclusion lists, for anyone who reads. A co-branded card is a loyalty program with an interest rate - a fine tool if you pay in full, a very expensive one if you do not. The machine works because everyone at the table gets paid: the brand gets your frequency, the bank gets your balance, the network gets the volume. Everyone except the person who thought 5% was free money.