Amazon's Great Indian Festival starts 8 October. Flipkart's Big Billion Days opens to early-access members the same day. No-cost EMI will be everywhere.
It isn't free. But "EMI bad, pay cash" is just as wrong, and both answers skip the only question that matters: which route leaves you out of pocket by less?
That question has a number. It just isn't the one on the banner.
Scope: this article is about the common credit-card EMI structure offered at checkout by Amazon, Flipkart and large retailers. Other schemes — cardless EMI, pay-later products, NBFC consumer loans — are structured differently and can have different fee and tax mechanics. Check the terms you're actually shown.
What "no cost" means
In 2013 the Reserve Bank instructed banks to refrain from offering low- or zero-percent consumer-durable finance through adjustments to manufacturer or dealer discounts, saying such schemes lacked transparency and could obscure the applicable interest rate.
In the structure used today, the lender still calculates interest as normal, and a discount funded by the merchant, the brand, the bank or some combination is intended to offset it. Your instalments add up to roughly the sticker price. The interest hasn't vanished; it has been moved, and two pieces of it stay with you.
What stays with you
GST on the interest. CBIC's guidance exempts interest on loans and advances from GST but explicitly excludes interest on outstanding credit card balances. So for credit-card EMI, the interest component is generally subject to 18% GST, charged to the cardholder. The promotional discount is intended to offset the interest. The GST and applicable fees can still remain with you.
The processing fee, and GST on that too. Fees vary sharply by issuer, and some are percentage-based rather than flat.
A worked example, using published terms
IDFC FIRST currently publishes 18% a year on reducing balance for credit-card EMI conversion, with a processing fee of ₹99 or 1% of the transaction, whichever is higher, plus GST. Your actual offer may differ by card, transaction or promotion — use the terms shown when you convert.
Suppose a ₹60,000 phone is offered as no-cost EMI using these published charges, over six months:
| Interest | ₹3,189 |
| GST on interest (18%) | ₹574 |
| Processing fee (1%) | ₹600 |
| GST on fee | ₹108 |
| Extra cost | ₹1,282 |
The ₹3,189 interest isn't added on top of the ₹1,282. In a genuine no-cost EMI offer, the promotional discount is intended to offset that interest. The ₹1,282 is the residual — GST on the interest, plus the fee and its GST — left over after that offset.
That residual is an additional 2.14% of the purchase price over six months.
Note what the percentage fee does. Had this been a flat ₹199 fee at 14%, the cost would have been ₹680 — about half. The fee structure matters more than the interest rate at these amounts. Read both before assuming a number.
Your issuer's rate and fee will differ. The method is what transfers, not the ₹1,282.
In context, that's still cheap credit
Worth saying, because most articles stop at "it isn't free" and leave you feeling cheated.
A genuinely subsidised EMI can still be inexpensive borrowing compared with carrying a revolving credit-card balance, where interest keeps accruing month after month. If you were going to buy the thing anyway, that's a meaningfully cheaper way to spread the cost.
The comparison that actually decides it
Here is the part almost nobody puts clearly. Don't compare the discounts. Compare what leaves your account.
EMI wins when: (EMI discount − upfront discount) + (EMI cashback − upfront cashback) is greater than GST on interest + processing fee + GST on fee + any other EMI-only charges
Written the other way:
Upfront effective cost = price − upfront discount − upfront cashback/rewards EMI effective cost = price − EMI discount − EMI cashback/rewards + GST on interest + fee + GST on fee
Pick the lower one. If they're close, liquidity and cash-flow considerations can become the deciding factor — see below.
Comparing discount against discount gets this wrong, because the two routes often don't earn the same cashback or rewards, and only one carries the financing costs.
Why the discounts differ
Festive-sale offers can set different discount caps for EMI and non-EMI transactions on the same card — the exact amount and eligibility depend on the sale, the product and the card. The extra can be funded by the merchant, the brand, the bank, or a mix. Don't assume a source, and don't assume the gap exists until you've read the offer.
Two consequences:
If the discount is identical either way, paying upfront has the lower nominal cash cost — by exactly the GST and fees. There's no threshold to hunt for and no tenure at which it flips. If preserving liquidity matters to you, weigh that separately against this known, fixed amount.
If the EMI offer is larger, it can win — but only if the extra clears the financing cost. On the example above, the additional EMI discount would need to exceed ₹1,282 before EMI becomes cheaper on these costs alone.
One reason to choose EMI anyway
Liquidity has value. If paying ₹60,000 today would leave your emergency fund too thin, or push you toward more expensive borrowing later, spreading it can be rational even at a higher nominal cost.
But money earmarked for those instalments isn't spare money. You've already committed it.
The cost the formula almost misses
Converting a purchase to EMI can cost you the card benefits you'd otherwise earn. Some issuers reverse reward points on conversion — DBS states this explicitly in its merchant EMI terms.
Whatever your card would have earned on the purchase belongs in the comparison above. Check your own terms rather than assuming it carries over.
What bites later
Early closure isn't free. Some issuers charge a percentage of outstanding principal plus GST to foreclose — Federal Bank and IDFC FIRST both currently state 3% plus GST. Waiver windows, where they exist, are short.
A missed instalment can trigger late-payment charges and interest at card rates, and reported delinquency can affect your credit history. The exact treatment varies by issuer.
Your credit limit gets used up. With many credit-card EMI products the purchase amount, fee and GST are blocked against your available limit and released progressively as principal is repaid. IDFC FIRST documents this directly. Two or three festive EMIs can leave very little headroom.
The cost that isn't on any statement
The arithmetic above can tell you which payment method is cheaper. It cannot tell you whether to buy the thing.
₹1,282 on a phone you were going to buy is cheap financing. ₹1,282 on a phone you weren't going to buy until the EMI made it feel affordable isn't a financing decision at all — it's a ₹60,000 one. The sale is designed so those two questions feel like the same question.
A checklist for 8 October
- Note the non-EMI and EMI discounts separately. They're often capped differently on the same card.
- If they're identical, upfront has the lower cash cost — unless preserving liquidity is worth more to you than that fixed amount.
- If the EMI one is bigger, find the interest rate and the fee structure in the EMI terms. A percentage fee changes the answer far more than the rate does.
- Work out GST on the interest, the fee, and GST on the fee.
- Add any cashback or rewards you'd lose by converting.
- Compare final out-of-pocket cost, not discount against discount.
- Decide whether you want the thing before you look at how it's financed.
A note on our calculator. The EMI Calculator's Consumer EMI mode (₹5,000 to ₹10 lakh, three to thirty-six months) has a No-Cost EMI Breakdown built for exactly this: enter the purchase price, rate, tenure and processing fee, and it works out the GST on interest, the GST on the fee, and a straight EMI-vs-upfront verdict. It models interest as a flat percentage of the purchase price for the tenure you enter, not the bank's reducing-balance schedule — so feeding in IDFC FIRST's published 18% won't reproduce this article's ₹3,189 exactly; for a reducing-balance figure, use the formula above. It also currently takes a single merchant discount percentage rather than separate EMI and upfront figures, and it doesn't yet subtract lost cashback or reward points — for those two inputs, use the formula above and feed the calculator's real-cost number into it.
Sources and assumptions
Primary
- RBI master circular position on low- and zero-percent consumer-durable finance schemes, following its 2013 guidance on transparency in such structures.
- GST: CBIC sectoral FAQs — the exemption for interest on loans and advances excludes interest on outstanding credit card balances, so credit-card EMI interest attracts 18% GST.
- Rate and fee in the worked example: IDFC FIRST published terms for credit-card EMI conversion — 18% a year on reducing balance, processing fee of ₹99 or 1% of the transaction amount, whichever is higher, plus GST.
- Reward reversal on conversion to merchant EMI: DBS Bank merchant EMI terms.
- Foreclosure at 3% plus GST: Federal Bank and IDFC FIRST current terms.
- Credit limit blocking and progressive release: IDFC FIRST published terms.
- Sale dates: Amazon Great Indian Festival from 8 October 2026; Flipkart Big Billion Days early access 8 October 2026, per each company's own announcement.
Calculation notes
- Worked example: a ₹60,000 purchase over six months, using IDFC FIRST's currently published 18% reducing-rate EMI conversion charge and 1%-or-₹99 processing fee. This is a construction on that issuer's published financing terms, not a claim that any specific merchant is advertising this exact phone as no-cost EMI.
- Interest calculated on reducing balance, as the issuer's terms specify.
- The ₹1,282 is GST on the interest plus the fee and its GST — the residual left over after a promotional discount is assumed to offset the ₹3,189 interest itself.
- Actual rates, fees and offers differ by issuer, card, product and promotion — use the terms shown at checkout.
- Discount caps and cashback terms change by sale and are not modelled here.
This article explains arithmetic. It is not financial advice, and it does not recommend any purchase, product, issuer or lender.