The Money Decoded

Calculators

Credit Card EMI Calculator

Educational content only, not financial advice

Converting a big credit card purchase into EMIs turns one large bill into fixed monthly instalments, but the quoted interest rate is only part of the cost. Enter the amount, your card's EMI rate, and the processing fee, and this calculator shows the monthly EMI across 3, 6, 12, and 24 months, each with the total interest, the 18% GST that most tools leave out, and the full cost of borrowing. Switch to no-cost mode to see what a "no cost" EMI still costs.

The rate your card charges to convert to EMI, usually 13% to 24% a year. Not the ~42% revolving rate.

One-time, on the purchase. About ₹500 here. 18% GST applies to this fee.

EMI type

Your instalments include interest. GST is 18% on the interest plus the processing fee.

3 months

Monthly EMI

₹17,113

Total interest
₹1,339
GST at 18% (interest + fee)
₹331
Total cost of borrowing
₹2,170 (4% of purchase)

6 months

Monthly EMI

₹8,727

Total interest
₹2,359
GST at 18% (interest + fee)
₹515
Total cost of borrowing
₹3,374 (7% of purchase)

12 months

Monthly EMI

₹4,537

Total interest
₹4,439
GST at 18% (interest + fee)
₹889
Total cost of borrowing
₹5,827 (12% of purchase)

24 months

Monthly EMI

₹2,448

Total interest
₹8,756
GST at 18% (interest + fee)
₹1,666
Total cost of borrowing
₹10,922 (22% of purchase)

EMI uses the standard reducing-balance formula. GST is applied at 18% on the interest and the processing fee, the way Indian issuers bill it, never on the principal. No-cost EMI treats your instalments as principal only while still charging GST on the interest the seller absorbed as a discount. This is an educational estimate; your card's exact rate, fee, and rounding will differ, so check the offer screen before you convert.

How the calculator works

The calculator uses the standard reducing-balance EMI formula, the same one every bank and aggregator uses: EMI equals the principal times the monthly rate times (1 plus the rate) to the power of the months, divided by that same power minus one. On top of the EMI it adds the two charges that make the real cost higher than the sticker rate: a one-time processing fee, and 18% GST applied to both the interest and the fee. It runs all of that across four tenures at once, so the trade-off between a lower monthly figure and a higher total is visible in a single view.

The number worth watching is the total cost of borrowing as a share of the purchase. A short tenure keeps it small; stretch the same purchase to 24 months and the interest plus GST can climb past a fifth of what you bought.

A worked example

Take the default: a ₹50,000 purchase at 16% a year with a 1% processing fee of ₹500. Over 12 months the EMI is about ₹4,537, the total interest is roughly ₹4,440, the 18% GST on that interest is about ₹799, and the GST on the fee adds ₹90, so the cost of borrowing is near ₹5,830, about 12% of the purchase. Halve the tenure to 6 months and the EMI jumps to about ₹8,727 but the cost of borrowing drops to roughly ₹3,370. Stretch it to 24 months and the EMI eases to about ₹2,448 while the cost climbs past ₹10,900, close to 22% of what you spent.

How GST on a credit card EMI works

GST on a credit card EMI is charged at 18% on the interest and the processing fee, and never on the principal. Credit card EMI interest is a specific exception to the usual rule that loan interest is GST-exempt, so the tax genuinely applies. On a ₹10,000 conversion with ₹1,000 of interest and a ₹500 fee, the GST is 18% of ₹1,000 plus 18% of ₹500, which is ₹180 plus ₹90, or ₹270 in tax alone. Because most calculators omit GST, they quietly understate the cost, which is why every tenure above carries its own GST line.

Is no-cost EMI really free?

No-cost EMI is not actually free: the seller hides the interest as an upfront discount, so your instalments look interest-free, but the 18% GST on that interest and the processing fee still land on you. On a ₹30,000 no-cost phone, the interest folded into the price still generates a few hundred rupees of GST, and a ₹500 processing fee adds ₹500 plus ₹90 of GST, so a "free" purchase can quietly cost ₹1,000 or more. Switch the calculator to no-cost mode and it strips the interest out of your instalments but keeps the GST and fee visible, which is the honest picture the offer screen rarely shows.

EMI vs letting the balance revolve

Converting to EMI is far cheaper than letting a balance revolve. An EMI runs at roughly 13% to 24% a year, while a balance left unpaid on the card revolves at about 3.5% a month, which is close to 42% a year, plus the same 18% GST on that interest. So the same ₹50,000, carried on the card instead of converted, costs two to three times as much. The EMI is a way to cap the damage once a purchase is too big to clear in one cycle. For the mechanics of that revolving rate, see how credit card interest works.

Pair this calculator with the guides

If you are weighing converting an existing balance rather than a fresh purchase, the credit card interest calculator shows what that balance costs at your payment versus the minimum, so you can compare it against the EMI cost here. For the full mechanics of card interest, grace periods, and the minimum-payment trap, read How Credit Card Interest Works. And if the goal is clearing several balances, the debt snowball vs avalanche calculator compares the two payoff orders.

Frequently asked questions

How is EMI calculated on a credit card?

A credit card EMI uses the standard reducing-balance formula: EMI equals P times r times (1+r)^n, divided by ((1+r)^n minus 1), where P is the purchase, r is the annual rate divided by 12, and n is the number of months. A ₹50,000 purchase at 16% a year over 12 months works out to about ₹4,537 a month, with roughly ₹4,440 of total interest. The calculator above runs this across 3, 6, 12, and 24 months so you can see how the tenure changes both the monthly figure and the total cost.

Is there GST on a credit card EMI?

Yes, 18%, but only on the interest and the processing fee, never on the purchase amount itself. On a ₹50,000 EMI at 16% over 12 months, the roughly ₹4,440 of interest attracts about ₹799 of GST, and a 1% processing fee of ₹500 adds another ₹90. Most EMI calculators leave GST out entirely, which understates the real cost, so this one shows it as its own line for every tenure.

Is no-cost EMI really free?

No. In a no-cost EMI the seller gives you a discount equal to the interest, so your instalments look interest-free, but two charges survive: the 18% GST on that interest, and the processing fee plus its own 18% GST. On a ₹30,000 no-cost purchase the surviving GST and fee can still add several hundred rupees. Switch the calculator to no-cost mode and it shows exactly what a no-cost EMI still costs you.

What is the interest rate on a credit card EMI?

Most Indian issuers charge roughly 13% to 24% a year to convert a purchase to EMI, depending on the card, the tenure, and your credit score. As of 2025-26, ICICI Instant EMI is around 15.99%, HDFC SmartEMI starts near 0.99% a month, SBI Card Flexipay runs 9.75% to 24% by bureau score, and Axis sits around 14% to 16%. That is far below the roughly 42% a year a revolving balance costs, which is the whole point of converting.

What is the processing fee on a credit card EMI?

A one-time fee charged when you convert, typically 1% to 3% of the amount with a cap, plus 18% GST on the fee. As of 2025-26, ICICI charges about 2.99% capped near ₹299, HDFC SmartEMI is around ₹799, and SBI Card Flexipay is 1% or ₹2,000 whichever is lower and nil on 24 and 36-month tenures. Enter your card's fee in the calculator and it flows into the GST line and the total cost.

Is a credit card EMI cheaper than a personal loan?

Sometimes, but not always. Credit card EMI rates of 13% to 24% a year overlap with personal loan rates of about 10% to 18%, so a personal loan can be cheaper for a large amount over a long tenure, while a card EMI is quicker and needs no fresh approval for a smaller, shorter conversion. The deciding factors are the rate you are offered, the processing fee on each, and how fast you need the money, not the label.

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