Guides & Tips

How to choose a credit card in India: the arithmetic behind the offer

Most credit card advice compares features. Features are not what a card costs you. Two numbers decide whether a card pays you or bills you — the rate you pay if you ever carry a balance, and the rupee value of rewards after the fee. This page works both out with real arithmetic, in the order that matters, so you can run it on any card in front of you.

Every figure below is arrived at on the page. Where a rule comes from the regulator rather than from us, it is cited at the bottom.

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Last reviewed 2026-09-22

Step 1: Will you ever carry a balance?

The technique

Price the revolving rate first, because it is 20 to 40 times the rewards rate

A good rewards card returns roughly 1 to 1.5 percent of spend. A revolving balance costs roughly 3 to 4 percent a month. One month of carried balance can wipe out two years of rewards, which is why the order of these questions matters more than the answers.

RBI requires every issuer to quote an Annualised Percentage Rate and to set out the finance charges in your Most Important Terms and Conditions. That document, not the marketing page, holds your actual rate — look it up before you compare anything else.

Here is what a balance does at an illustrative 3.5 percent a month, paying the minimum due of 5 percent each cycle. RBI also requires that the minimum due be set so the balance never grows, so this is the best case for revolving, not the worst.

Month	Opening balance	Interest	GST on interest	You pay	Actually clears
1	₹1,00,000	₹3,500	₹630	₹5,175	₹1,675
12	₹83,043	₹2,907	₹523	₹4,297	₹1,391
24	₹67,806	₹2,373	₹427	₹3,509	₹1,136
36	₹55,365	₹1,938	₹349	₹2,865	₹927
60	₹36,912	₹1,292	₹233	₹1,910	₹618

Illustrative at 3.5% per month plus 18% GST on the interest, minimum due 5% of the statement balance, no fresh spending. GST is paid in cash each month and not added to the balance, as RBI requires. Substitute the rate from your own MITC and the shape does not change.

In month one you hand over ₹5,805 in cash and ₹1,675 of it reaches the debt. Seventy-one percent of the payment is cost
Five years of paying the minimum on ₹1,00,000: ₹2,20,783 paid, ₹1,57,078 of it interest and GST, and ₹36,294 still owing
The same ₹1,00,000 as a personal loan at 14 percent over three years is an EMI of ₹3,418 — ₹1,23,039 in total, and the debt is gone in month 36
That is a ₹97,744 difference on the same ₹1 lakh, and the cheaper route also ends five years sooner
RBI requires the warning about minimum payments to be printed on every statement. It is there because the arithmetic above is what it describes
If you carry a balance even twice a year, no rewards rate on any card recovers this. Choose on APR, choose the lowest one you qualify for, and treat the rewards as irrelevant

Step 2: The real rewards rate

The technique

Divide what actually lands in your pocket by what you actually spend

The advertised rate is the rate before the monthly cap, before the category restriction, before the redemption ratio and before the fee. Each of those is a multiplier below one, and there are usually four of them. The headline number and the real number are routinely different by a factor of ten.

The formula is the whole of it: rupee value of rewards in a typical month, divided by your eligible spend in that month. Do it after the cap, using what you would really redeem for.

Five cards, one spender, ₹50,000 a month — ₹6,00,000 a year.

Card as advertised	Rewards a year	Fee + GST	Net a year	Real rate
'5% cashback', capped at ₹500 a month	₹6,000	₹1,179	₹4,821	0.80%
Flat 1.5% cashback, no cap	₹9,000	₹590	₹8,410	1.40%
1 point per ₹100, point worth ₹0.25	₹1,500	₹1,179	₹321	0.05%
1 point per ₹100, point worth ₹1.00	₹6,000	₹2,950	₹3,050	0.51%
Lifetime free, flat 1%	₹6,000	₹0	₹6,000	1.00%

Fees shown with 18% GST added. Annual fees and point values here are illustrative bands used to demonstrate the method, not quotes from any issuer — use the numbers from the card's own MITC and reward catalogue.

The card advertising 5 percent returns 0.80 percent. The card advertising 1.5 percent returns 1.40 percent. The headline ranks them backwards
The lifetime-free card at a plain 1 percent beats the 5 percent card by ₹1,179 a year, which is exactly the fee
A cap is a rate in disguise: ₹500 a month on ₹50,000 of spend is 1 percent, whatever the percentage printed beside it
Redemption ratio is the multiplier nobody checks. The same points earning is worth ₹1,500 or ₹6,000 a year depending only on what you redeem into
Points that expire, or that need a 10,000-point minimum you will never reach, are worth zero. Count them at zero
Do this calculation on your own spend, not on ₹50,000. If you spend ₹15,000 a month, every rupee figure above divides by 3.3 and most fee cards stop making sense

Step 3: Your fee break-even spend

The technique

Break-even spend = fee including GST, divided by your real rewards rate

A fee is not expensive or cheap on its own. It is expensive relative to the spend you will actually put through the card. The break-even figure turns an argument about whether a card is worth it into a number you either clear or do not.

Take a ₹999 fee. With 18 percent GST it is ₹1,179. At your real rewards rate from Step 2, this is the annual spend you need before a single rupee of the reward is yours.

Annual spend needed to break even on a ₹1,179 fee

Real rate 0.25% — points at catalogue value: ₹4,71,528 a year (₹39,294 a month)
Real rate 0.50%: ₹2,35,764 a year (₹19,647 a month)
Real rate 1.00%: ₹1,17,882 a year (₹9,823 a month)
Real rate 1.50%: ₹78,588 a year (₹6,549 a month)
Real rate 2.00%: ₹58,941 a year (₹4,912 a month)

Below the figure on the right, the card costs you money every year you hold it. This is before any welcome bonus, which is one-time and should not decide a recurring fee.

'Free for the first year' is a discount on year one only. Compare on the year-two fee, because that is the one you pay repeatedly
A spend-based waiver is only a waiver if the spend was going to happen anyway. Spending ₹3,00,000 to avoid ₹1,179 is not a saving, it is a ₹2,98,821 purchase
Add-on card fees, and the fee on a card you keep open but do not use, are pure cost with no offsetting rewards at all
A card you hold for the credit-history length but never spend on costs you its fee every year and earns nothing. Either use it or move to a lifetime-free card
Run Step 2 and Step 3 together. A high real rate with a high fee and a low real rate with no fee can land in the same place

Step 4: Match the category to your spend

Only now does the category question matter, and it is answered by your statement rather than by your self-image. The test for each of these is the same: does the category rule cover enough of your real spend to beat a flat-rate card with no restrictions?

Cashback on online spend: worth it only if online is the majority of your card spend, not a third of it
Travel and miles: the conversion ratio decides everything. Miles valued below ₹0.40 rarely beat a flat 1.5 percent cashback card
Fuel: a 1 percent surcharge waiver capped at ₹200 a cycle is ₹2,400 a year at most, and only if you spend ₹20,000 a month on fuel to reach the cap
Co-branded with one retailer: worth it when 30 percent or more of your spend genuinely goes to that brand, and only while you still shop there
Secured against a fixed deposit: the right first card if you have no bureau history, because approval does not depend on a score you have not built yet
A flat-rate card with no categories is the correct default. It is what you compare every specialised card against, and it wins more often than people expect

Step 5: Apply once, not five times

The technique

Every application is a hard enquiry, and the score it costs is priced into your next loan

Bureau scores fall when several hard enquiries land in a short window, because a cluster of applications reads as someone short of money. The cost does not show up on the card — it shows up months later in the rate you are offered on something larger.

Shortlist on paper, using Steps 1 to 4, and apply to exactly one. Then watch the second number lenders look at: utilisation, which is your statement balance as a share of your total limit.

Balance on statement date	Limit ₹2,00,000	How it reads
₹30,000	15%	Healthy
₹60,000	30%	At the line most lenders watch
₹80,000	40%	Above the line, starts costing you
₹1,20,000	60%	Reads as dependence on the limit

Utilisation is measured on the statement date, not the due date. Paying part of the balance before the statement generates lowers the reported figure at no cost to you.

The bureau reports what the balance was on the statement date. Pay ₹20,000 before that date and 40 percent becomes 30 percent for free
What a score band is worth: one percentage point on a ₹10,00,000 personal loan over five years is ₹30,121 in extra interest. That is the real price of a cluster of card applications
Closing an old card shortens your credit history and cuts your total limit, which pushes utilisation up on both counts. If it is free to hold, keeping it usually helps
Card cash withdrawals have no interest-free period at all — interest runs from day one, plus a withdrawal fee. Treat the cash limit as if it does not exist
RBI caps your liability for unauthorised transactions when you report them promptly, and this protection does not extend to UPI or net-banking transfers in the same way. It is a real reason to pay by card where the merchant is unfamiliar

Step 6: Run the whole thing on one card before you sign

Six numbers, from the card's own MITC, in this order. If you cannot fill all six, you do not yet know what the card costs.

The six-line check

1. Monthly interest rate, and APR: From the MITC, not the landing page
2. Annual fee from year two, plus 18% GST: The recurring number
3. Real rewards rate after cap and redemption: Step 2 formula
4. Break-even annual spend: Line 2 ÷ line 3
5. Your actual annual card spend: From your statements
6. Line 5 minus line 4: Positive means the card pays you

If line 1 matters to you at all — that is, if you ever carry a balance — lines 2 to 6 are secondary and you should be choosing on line 1 alone.

Line 5 is the one people get wrong, and they get it wrong upward. Use the statement figure
A negative line 6 is not a reason to feel bad about a card. It is a reason to hold a lifetime-free card instead and put the difference to work
Redo this once a year. Fee structures and reward catalogues change, and the card that cleared break-even last year may not this year

Where Unyfy fits

Unyfy is built around the two numbers this page is about: what your existing credit costs, and what your spending is worth back to you.

On the first, it reads your card statements and computes the monthly cost of any carried balance — interest, the GST on it, and how much of each payment is reaching the principal. Where a consolidation loan is genuinely cheaper, it puts the rupee difference over the full tenure in front of you; where it is not, it tells you to keep paying the card down instead.

On the second, it categorises your real spend so the rewards calculation in Step 2 runs on facts, and it offers discounted vouchers at merchants you already buy from, which apply to the same spend without a fee, a cap or a redemption ratio.

How Unyfy helps you pick a card that fits your spend

Step six only works if line five, your actual annual card spend, comes from the statement rather than from memory, and that is the line the app fills in for you. It reads your bank and card transaction emails and, on Android, your bank's transactional SMS, so the category split in Step four is taken from what you really paid for, with no typing and no bank password.

Card discovery then runs that split against 605 Indian credit cards from 32 issuers. What you see is a short list of cards your income qualifies for, each set against the categories your money actually goes to, so a co-branded or travel card only rises if your own spending would carry it past its fee. If the flat-rate card already in your wallet wins, that is a valid result and there is nothing to apply for.

The matching is about rewards fit. If you ever carry a balance, Step one still decides, and the card's own MITC is the document to read. Unyfy earns a commission when you take a card through it, and the issuer decides whether to approve you, so shortlist on the arithmetic above and send one application.

Install Unyfy on Android, or use the web app at app.unyfy.co.in on an iPhone.

Common questions

What is the real rewards rate on a credit card?

The rupee value of rewards you receive in a typical month divided by your eligible spend that month, calculated after the monthly cap and after the redemption ratio. A card advertising 5 percent cashback capped at ₹500 a month, on ₹50,000 of spend, has a real rewards rate of 1 percent — and 0.80 percent after a ₹999 annual fee plus GST.

How much does paying only the minimum due on a credit card cost?

On a ₹1,00,000 balance at an illustrative 3.5 percent a month with 18 percent GST on the interest, paying the 5 percent minimum due for five years costs ₹2,20,783 in cash, of which ₹1,57,078 is interest and tax, and leaves ₹36,294 still owing. The same ₹1,00,000 as a personal loan at 14 percent over three years costs ₹1,23,039 in total and clears completely.

How do I work out whether a credit card's annual fee is worth paying?

Divide the fee including GST by your real rewards rate to get your break-even annual spend. A ₹999 fee is ₹1,179 with GST; at a 1 percent real rate you need ₹1,17,882 of annual spend before the card starts paying you, and at 0.25 percent you need ₹4,71,528.

Does applying for several credit cards hurt my credit score?

Each application is a hard bureau enquiry, and several in a short window read as financial stress and push the score down. The cost appears later: one percentage point on a ₹10,00,000 personal loan over five years is ₹30,121 in extra interest. Shortlist on paper and apply to one card.

What credit utilisation should I keep on my card?

Under 30 percent of your total limit, measured on the statement date rather than the due date. On a ₹2,00,000 limit that is ₹60,000. Paying part of the balance before the statement is generated lowers the reported figure at no cost.

Choose a credit card the way you would price any other borrowing. If you will ever carry a balance, the rate is the only number that matters and everything else on the brochure is decoration. If you never carry one, the card is a payment instrument and the question is arithmetic: real rewards rate after cap and redemption, against the fee including GST, against the spend you actually put through it. Both questions are answerable in ten minutes with the MITC and your last three statements. Informational page, not financial advice. Rates, fees, caps and reward values differ by issuer and by card, change without notice, and are set at the issuer's discretion — confirm every figure in the card's own Most Important Terms and Conditions before you apply.

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How to choose a credit card in India: the arithmetic behind the offer

Step 1: Will you ever carry a balance?

Step 2: The real rewards rate

Step 3: Your fee break-even spend

Step 4: Match the category to your spend

Step 5: Apply once, not five times

Step 6: Run the whole thing on one card before you sign

Where Unyfy fits

How Unyfy helps you pick a card that fits your spend

Common questions

What is the real rewards rate on a credit card?

How much does paying only the minimum due on a credit card cost?

How do I work out whether a credit card's annual fee is worth paying?

Does applying for several credit cards hurt my credit score?

What credit utilisation should I keep on my card?

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