How Credit Card Companies Make Money in India

Credit card companies India earn mainly from revolving-balance interest, merchant interchange and direct card fees, while customers who pay in full on free cards generate little revenue. The article explains how merchant discount rates fund rewards, why UPI yields no issuer income, and why card issuers target higher-value spending.

Credit card issuers in India make money from three sources: interest charged to people who do not pay in full, a share of the merchant fee on every transaction, and direct fees such as annual charges, late payment penalties and foreign currency markups. Interest is the largest of the three by some distance.

If you pay your bill in full every month and hold a free-for-life card, you are close to unprofitable for the issuer. That is not an accident. It is the model working as designed, with the majority subsidising the minority who never revolve.

Where the money comes from when you swipe

Buy something for ₹10,000 and the merchant does not receive ₹10,000. They receive roughly ₹9,800. The gap is the Merchant Discount Rate, and it is split three ways.

Interchange is the important one, because it flows to the issuer. It is what funds your reward points. When a card offers 5% back on a category, the issuer is spending part of its interchange to buy your spending behaviour, and betting the rest comes back through interest and fees.

India is unusual here

Most explanations of card economics are written about the United States and do not transfer. Three Indian specifics matter.

Credit card MDR is not capped by the regulator. It is negotiated between merchant and acquirer, and typically runs 1.5% to 3% depending on card type and merchant category. Premium cards carry higher interchange, which is why some merchants quietly discourage them.

UPI and RuPay debit card transactions carry zero MDR. This was mandated from January 2020 through Section 10A of the Payment and Settlement Systems Act, 2007 and Section 269SU of the Income-tax Act. There is no merchant fee at all on those rails.

Debit card MDR is capped by RBI on a sliding scale by merchant size, with small merchants facing a maximum of 0.4% on POS transactions and larger merchants up to 0.9%, subject to absolute caps.

The consequence is stark. On UPI, the issuer earns nothing per transaction. On a credit card, it earns interchange. That single fact explains most of what has happened in Indian cards over the last five years: UPI took the small-ticket, high-frequency payments where the economics never worked, and issuers responded by pushing credit cards up-market into travel, dining and large-ticket spending where interchange is worth collecting. It also explains the industry’s interest in credit-on-UPI through RuPay credit cards, which restores an MDR above ₹2,000.

Interest: the real business

Interchange is steady but thin. Interest is where the money is.

Indian credit cards typically carry 3% to 3.75% per month on revolving balances. Annualised, that is roughly 36% to 45%. There are few legal lending products in India that price higher.

The mechanics are less intuitive than people assume, and the misunderstanding is expensive.

The interest-free period disappears entirely

You get up to 45 to 50 days interest free, but only if you pay the full statement balance by the due date.

Pay anything less, including the minimum due, and the grace period is withdrawn. Interest is then charged from the transaction date on the full amount, not from the due date on the unpaid portion. New purchases made after that also start accruing interest immediately, with no grace period, until the balance returns to zero.

A worked case. Statement balance ₹50,000, you pay ₹45,000, leaving ₹5,000. Most people expect interest on ₹5,000 for a few weeks. What actually happens is interest on the full ₹50,000 from each purchase date, plus interest on every new purchase from the day you make it. The bill is several times what was expected, and this single mechanic generates a large share of Indian card interest income.

The minimum due is the product

The minimum payment is typically 5% of the balance. Paying it keeps your account current and your credit report clean, which makes it feel responsible. It is not. It is the mechanism that keeps the balance outstanding and the interest running.

On a ₹1,00,000 balance at 3.5% per month, paying only the minimum takes years to clear and costs more in interest than the original purchase. Issuers describe customers who behave this way as revolvers, and revolvers are the profitable segment.

The fee line

Fees are the third leg, and they are more varied than most cardholders realise.

• Joining and annual fees. Often waived on spending thresholds, which is itself a device to increase spending.
• Late payment fees, charged on a slab basis by outstanding amount, separate from and additional to interest.
• Foreign currency markup, commonly 2% to 3.5% on international spending, applied on top of the exchange rate.
• Cash advance fees. Withdrawing cash on a credit card attracts a fee of around 2.5% and interest from day one, with no interest-free period at all.
• Over-limit fees, where you have consented to over-limit transactions.
• EMI processing fees, charged for converting a purchase to instalments.
• Reward redemption fees, charged for using the points the card advertised.

GST at 18% applies on these fees and on the interest component of EMI, which is a detail most comparisons omit.

So who pays for your free card?

Three groups, in order of contribution.

Revolvers carry balances and pay 36% to 45% annualised. They fund most of the rewards ecosystem.

Merchants pay MDR on every transaction, and price it into what everybody pays, including customers paying cash.

Occasional slip-ups by otherwise disciplined users. One late payment, one cash withdrawal, one month of partial payment.

If you are none of these, you are what the industry calls a transactor, and you are extracting value from the system rather than contributing to it. Issuers know this and manage it through annual fees, spending-linked waivers and steadily less generous reward structures on entry-level cards.

Using this to your advantage

The model is not a reason to avoid credit cards. It is a reason to use them on one side of the ledger rather than the other.

1. Pay the full statement balance, always. Not the minimum, not most of it. Full. This single habit converts the product from a 40% loan into free short-term credit.
2. Never withdraw cash on a credit card. Fee plus interest from day one makes it among the most expensive money available to a retail borrower in India.
3. Automate the payment. Set an auto-debit for the total amount due, not the minimum. Most interest paid by disciplined users comes from forgetting, not from choosing.
4. Check whether a card’s annual fee is covered by what you actually spend, not by what you might. Reward maths is built on optimistic assumptions.
5. Treat no-cost EMI as a pricing decision, not a free service. There is a cost in there somewhere, usually a foregone discount or a processing fee, and GST applies to the interest component.

Common questions

Do issuers lose money on people who always pay in full?
Not necessarily, because interchange still accrues on every transaction. But such customers are far less profitable, and on a free card with rich rewards they can be loss-making.

Why do some shops add a surcharge for cards?
They are passing on the MDR. Card network rules generally prohibit surcharging, so it is often not permitted, but it persists at small merchants.

Why do merchants prefer UPI?
Zero MDR. On a ₹10,000 sale, UPI costs the merchant nothing while a credit card can cost ₹150 to ₹300.

Is 3.5% per month really 42% a year?
Slightly more, because it compounds. Card interest is charged monthly on the outstanding balance, so the effective annual rate exceeds twelve times the monthly figure.

Does closing a card hurt my credit score?
It can, by reducing your total available credit and raising your utilisation ratio, and by shortening your average account age if it was an old card.

The short version

Interchange pays for the rewards, fees add a layer, and interest at 36% to 45% is the actual business. The single most valuable thing to understand is that partial payment removes the interest-free period retrospectively on the whole balance, not just the unpaid part. Pay in full and the economics work for you. Pay the minimum and you become the customer the product was designed around.