Credit card rewards without the debt trap

The whole game is one rule

A credit card is two different products depending on a single habit. Paid in full by the due date, it is an interest-free loan for up to about 50 days, with rewards, purchase protection and a credit history thrown in. Left with a balance, it becomes one of the most expensive loans sold to Indian households.

Most cards charge somewhere around 3% to 3.75% a month on revolving balances, and 18% GST is added to that interest. At 3.5% a month the simple rate is 42% a year; compounded monthly it is about 51%. Against that, the median liquid fund (Direct, Growth) on WealthTicker returned 6.47% over the year to 1 October 2026, and the median large-cap fund returned 11.64% a year over ten years. No investment you can buy earns what a revolving card balance costs, which means clearing card debt is the highest guaranteed "return" available to anyone carrying it.

What one month of revolving costs

Take a ₹50,000 statement, of which you pay only the minimum due.

One month of carrying the balance costs four times what the spending earned in rewards. And the damage is usually larger than the table shows, because once a balance revolves, most issuers charge interest on new purchases from the day they are made, not from the next due date. The interest-free period only comes back once the outstanding amount is cleared in full.

The minimum amount due is designed to keep you current, not to get you out. It is typically a small percentage of the balance plus that month's interest and charges, so paying only the minimum reduces the principal very slowly.

Using rewards without being used by them

Reward programmes work best for people who would have spent the money anyway. A few habits keep them that way:

• Autopay the full statement amount, not the minimum. Set it from the account your salary lands in. This one setting removes most of the risk in this post.
• Put recurring bills on the card, and nothing extra. Utilities, phone, insurance premiums and groceries are predictable, so they earn rewards without changing your spending.
• Treat rewards as a discount, not income. Points are worth a percent or two of what you spend. Spending more to earn them is buying ₹100 to get ₹1 back.
• Read the redemption rate, not the headline. A point is worth whatever the catalogue or transfer partner gives for it, and that varies widely between redemption options on the same card.
• Watch the joining and annual fees. A fee is worth paying only if the rewards you actually redeem, on your normal spending, exceed it. Many cards waive the annual fee above a spending threshold, which is another invitation to spend more than planned.
• Avoid cash withdrawals on a card. They usually attract a fee and interest from the day of withdrawal, with no interest-free period.

The debt-trap signals

The slide from rewards to debt rarely starts with a big purchase. It usually starts with one of these:

1. Paying "most" of the bill instead of all of it.
2. Converting purchases to EMIs without comparing the processing fee and effective rate with a personal loan.
3. Using one card's limit to pay another card's bill.
4. A statement balance that is higher than the month's take-home pay.

If any of these is already true, the order of operations is simple. Stop new spending on the card, then retire the balance as fast as possible. A personal loan at a lower rate can replace revolving card debt, but only if the card is not used again in the meantime; compare the cost on the personal loan EMI calculator. If you have savings sitting in a deposit or a liquid fund while a card balance revolves, using part of them to clear it is almost always cheaper than keeping both, as long as a basic emergency buffer remains.

Your credit score is part of the reward

Credit bureaus see your repayment history, how much of your limit you use, and how often you apply for new credit. Paying in full and on time builds the score that later decides the rate on a home or car loan, which is worth far more than any points balance. A low share of the limit in use generally reads better than a high one, and a string of card applications in a short period reads worse.

RBI's rules for card issuers also protect you in ways worth knowing: a late payment charge applies only when a payment is overdue by more than three days, and an issuer cannot raise your limit without your consent. If a fee looks wrong, raise it with the issuer first and the RBI Ombudsman after.

Where the card fits in a plan

A card should sit on top of a finished foundation, not in place of one. That foundation is an emergency fund large enough that an unexpected bill never has to go on the card, which the emergency fund calculator sizes from your monthly expenses. Once that exists, the money that is not being lost to interest can go where it compounds for you instead, for example a SIP. Our sibling post on financial planning for marriage, kids and a first home shows where the card's discipline matters most: just before a home loan application.

Rewards are a small, real benefit. Revolving interest is a large, certain cost. Keep the order of those two straight and the card works for you.

This post is educational, not financial advice. Card terms vary by issuer, and past fund returns do not predict future returns.