Credit Card EMI Calculator

Work out your monthly instalment, GST-inclusive interest, and the true total cost of converting a credit card purchase to EMI in India.

EMI Details

₹
%
Card issuers typically charge 13-24% p.a. for EMI conversion.
%
%
Applied to the interest and the processing fee.

Your Results

Monthly EMI
₹0
Total Payable
₹0
₹0
Total Interest
₹0
GST on Interest
₹0
Fee + GST
0%
Cost as % of Purchase

Purchase Amount vs. Total Cost of Conversion

No Cost EMI Calculator Loan Calculator Interest Calculator

How Credit Card EMI Is Calculated

Converting a credit card purchase or outstanding balance to EMI splits it into fixed monthly instalments using the same reducing-balance formula banks use for any other loan. Unlike a home or personal loan, though, credit card EMI in India adds GST on top of both the interest and any processing fee, which is a real, unavoidable part of the total cost.

The EMI formula

EMI = P × r × (1 + r)n / [(1 + r)n − 1]

P is the amount converted to EMI, r is the monthly interest rate (annual rate ÷ 12 ÷ 100), and n is the tenure in months.

Why GST makes this different from a bank loan

Interest on a home, personal or auto loan from a bank isn't subject to GST. Credit card EMI interest is treated differently: GST (18%) applies to the interest amount and to any processing fee, because the card issuer is providing a taxable financial service. That GST isn't optional or negotiable — it's added on top of whatever the EMI formula produces, which is why this calculator reports it as its own line item rather than folding it silently into the total.

Credit card EMI vs. revolving credit

The alternative to converting a large purchase to EMI is letting it revolve — paying only the minimum due each month. Revolving credit typically carries 36-45% annual interest on your full outstanding balance, compounding monthly, versus the 13-24% annual rate typical of EMI conversion on a reducing balance. For most large purchases, converting to EMI is substantially cheaper than letting the balance revolve.

How to use this calculator, step by step

  1. Enter the Purchase or Outstanding Amount you want to convert to EMI.
  2. Enter the annual Interest Rate your card issuer quotes for EMI conversion.
  3. Enter the Tenure in months and the Processing Fee percentage, if any.
  4. Click Calculate EMI to see your monthly instalment, GST-inclusive costs, and the total cost of converting versus the amount itself.

For example, converting a ₹40,000 purchase at 15% annual interest over 6 months, with a 1% processing fee and 18% GST: the EMI works out to about ₹6,961/month, with roughly ₹1,768 in interest (plus about ₹318 GST on that interest) and a ₹400 processing fee (plus ₹72 GST), for a total cost of conversion of about ₹2,558 — around 6.4% of the purchase amount. Enter these same figures above to reproduce this result.

Written and reviewed by Last updated

Frequently Asked Questions

Both use the same reducing-balance EMI formula, but credit card EMI converts an existing card purchase or outstanding balance without a separate loan application — it's approved instantly through your card issuer's app or by calling customer care. A personal loan is a fresh, separate loan with its own approval process, and often carries a lower interest rate than a credit card EMI conversion for the same tenure.

GST applies to financial services in India, and the interest charged on a credit card EMI is treated as a fee for that lending service — so 18% GST is added to the interest amount, and separately to any processing fee, on top of what the reducing-balance formula produces. This differs from a home or personal loan from a bank, where interest itself isn't subject to GST.

Converting a purchase to EMI blocks that amount against your card's credit limit for the full tenure, reducing how much credit you have free for other spending, even though you're paying it off gradually. Paying your EMIs on time supports your credit score the same as any other credit obligation; missing a payment can hurt it just as a missed regular credit card payment would.

Almost always, yes. Revolving credit (paying only the minimum due) typically carries a much higher interest rate — often 36-45% per annum — charged on your full outstanding balance until it's cleared, compounding monthly. Credit card EMI conversion rates are usually 13-24% per annum on a fixed, reducing balance, so converting a large purchase to EMI is normally far cheaper than letting it revolve.

Converting at the time of purchase (often offered at checkout) usually gets you the card issuer's standard or promotional EMI rate, sometimes with a merchant-funded discount similar to a No Cost EMI deal. Converting an already-billed outstanding balance later is a separate request to your card issuer and typically uses their standard EMI conversion rate, without any merchant discount, since the purchase discount window has passed.

Most card issuers allow foreclosure, but usually charge a foreclosure fee (commonly 2-3% of the outstanding principal) plus GST, and you still owe interest already accrued up to the foreclosure date. Whether foreclosing saves you money depends on the remaining tenure and interest versus that fee — check your card issuer's specific terms before prepaying.

No. A regular credit card EMI genuinely charges you the interest calculated by the reducing-balance formula, plus GST — there's no offsetting discount. A No Cost EMI is a specific merchant-funded offer where that same interest amount is discounted off the product's price upfront, so only GST on the interest and any fee remain as a real cost. See the No Cost EMI Calculator to check whether a "0% interest" offer is genuinely one of those.