Chapter 9

The 30% club

Published 29 September 2026

Every free flight, every lounge visit, every 5% cashback is subsidised by a cardholder who did not pay in full. The industry has a polite name for them - revolvers - and its whole profit model is built on their misfortune.

Membership is exclusive: at SBI Card, the country's largest pure-play issuer, 22% of balances revolved in the March 2026 quarter, inside a band of 22-24% that has held for two years. Call it the 30% club on a generous day; the rounding is the least offensive number in this chapter. Members pay for the privilege at the rate printed in the Most Important Terms and Conditions nobody reads: 3.75% per month, 45% a year, on a balance that a personal loan would carry at a third of that.

The economics are not subtle. In the same quarter SBI Card's cost of funds was 6.4% and its net interest margin was 11.1% - a spread most lenders would frame. Interest-earning balances, revolvers plus EMI conversions, were 54% of the book; the remaining 46% - the transactors who pay in full, collect their points and cost money - ride free on the yield the club generates. Profit after tax for the year: ₹2,167 crore.

The confession, on the record

The club is shrinking, and the earnings call says what that means in plain language. Revolve rates carry a "slight downward bias" into FY27, management concedes. An analyst does the arithmetic out loud: if revolvers keep falling, do you cut rewards further, hike fees? The answer from SBI Card's own leadership, verbatim: revolvers earn "a much higher rate", so a 1% decline "has to be compensated" - through "some other fee income sources". That is the whole mechanism of this file in one sentence, from the issuer's own mouth: when the club shrinks, the perks die and the fees multiply. The transactors' rewards were never a gift. They were a by-product of someone else's 45%.

This is why the devaluations in the earlier chapters were never really about lounges or "reward fatigue". They are what a lender does when its highest-yielding customers start escaping. The points get cut first because the points cannot complain to the RBI. The revolver, already paying 45%, absorbs the rest in silence - most members of the club do not know the rate they are paying, only the minimum due line that keeps them in it.

Two price lists, one trap

The club has two price lists, and HDFC Bank's current MITC (version 1.64) prints them on the same page. Revolve on an Infinia or Diners Black and the finance charge is 1.99% a month, 23.88% a year. Revolve on any other variant and, since 1 August 2024, it is 3.75% a month - 45% a year. The customer the bank fights to keep pays half the rate of the customer least likely to read the schedule. Cards issued against a fixed deposit sit at 1.99% as well, because secured money is cheap to lend back. The schedule does not price risk so much as it prices class: the better your card, the cheaper your mistake.

The trap itself is one sentence. Pay less than the full amount once, and "all new transactions will also attract finance charges" - from each transaction date, by the average daily balance method, until the old balance is repaid in full. The interest-free window the brochure sells is not reduced for a revolver. It is cancelled. Every grocery run and phone bill starts earning 3.75% a month on the day it is swiped, on the same plastic whose marketing leads with the window.

Then the smaller tolls on the way down. A cash advance costs 2.5% up front (the Infinia tier is spared) and finance charges from the day it is taken - no window there either. Cross the sanctioned limit and the overlimit charge is 2.5% of the excess, minimum ₹550, but only "basis explicit consent": the bank cannot levy it unless you opted in, so the penalty is a product. Even paying in rupees abroad is monetised - since 1 January 2023, a 1% markup on any transaction billed in Indian currency at an international location, a fee for the privilege of seeing your own currency on the terminal.

What the club dues buy

Follow the money one more time. A member carries ₹1,00,000 at 3.75% a month and pays ₹45,000 a year in finance charges. Her interest funds the lounge visits, the milestone vouchers, the 5% already shown capped at ₹1,500 a cycle. The issuer's brochure calls this an ecosystem. The ledger calls it what it is: a transfer, from the customers least able to pay to the ones most likely to leave.

The minimum due is the hook

SBI Card's own MITC spells out the line that keeps the club paying. The Minimum Amount Due is 100% of GST, plus 100% of any EMI, plus 100% of fees, plus 100% of finance charges, plus any overlimit amount - and 2% of the remaining balance. Two percent. The minimum is engineered so that paying it, faithfully, every month, retires almost nothing: the document's own example concedes that a ₹10,000 balance serviced at the minimum "will take up to 52 months" to clear. Four and a half years of 45% interest on a ₹10,000 spend, confessed in the terms themselves.

And when your payment lands, the MITC's waterfall decides what it touches first: GST, then EMI amounts, then fees, then finance charges, then balance transfers, then retail spends - and cash advances last. The most expensive money on the statement, withdrawn at finance-charge rates from the day it was taken, is the last thing your money is allowed to repay. Every rupee you send works through the cheaper balances while the dearest one keeps compounding.