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Credit Card Interest and Late Payment Charges Calculator

Pick your bank, enter the bill, what you will pay and when, and the calculator works out what the bill costs beyond itself: interest from each purchase date once the bill is not paid in full, the late fee by your bank’s own table, the 18% GST on both, whether the three days’ grace saves you, and how long the rest takes to clear if you pay only the minimum due. Twelve banks’ rates, late fees and minimum-due rules are in it, each read from the bank’s own MITC.

Last reviewed

RBI Credit Card Directions, 2025, paragraphs 2(16), 23(2), 23(3), 23(5) and 23(6) · 12 banks’ MITCs, read 29 October 2026

Your card

Each bank’s late fee and minimum-due rule, from its own MITC
From your card’s MITC or statement.

Your statement

₹
The full bill on the statement
₹
Leave blank to use your bank’s rule
On your statement; usually 15 to 21
About 15 for spending spread over the month
₹
ATM withdrawals on the card; 0 if none

What you pay, and when

₹

From the next bill on

₹
Set against paying only the minimum
₹
Each carries interest from its date while a balance is unpaid

The six rules every card bill runs on

The RBI’s Credit Card Directions, 2025 set them for every card-issuer, and each bank’s MITC repeats them in its own words. The full story, with the reporting and bundling changes, is in the guide RBI’s credit card rules.

One ₹40,000 bill, paid six ways

The calculator’s own engine on an HDFC Bank card at 3.75% a month: spends made 15 days before the statement, the due date 20 days after it. The figure is what the bill costs beyond the ₹40,000 itself, GST included.

Paid in full on the due date₹0 more than the bill

Every spend inside its interest-free period. The card costs nothing.

Only the ₹2,000 minimum, on time₹2,590 more than the bill

No late fee, but interest from each purchase date: 35 days on ₹40,000, then 10 days on the ₹38,000 left.

All of it, 3 days late₹2,211 more than the bill

Inside the grace: no late fee, no credit report. The interest-free period is still lost, so 38 days of interest.

All of it, 4 days late₹3,567 more than the bill

One day more, and the ₹1,100 slab for ₹25,001 to ₹50,000 applies, with GST, and the account can be reported past due.

Nothing paid for 10 days₹3,917 more than the bill

45 days of interest on the whole bill and the late fee: the costliest way to pay.

₹10,000 of it was a cash withdrawal, paid in full₹436 more than the bill

The spends stay free; the cash carries 30 days of interest from the withdrawal, and the ₹500 fee is on the bill already.

What each bank charges, from its own MITC

The standard rate, the late fee, the minimum-due rule and the interest-free period of 12 card-issuers, each read from the bank’s Most Important Terms and Conditions on its own website. Rates differ by card and, at some banks, by customer; the one on your statement is the one that counts.

How the credit card interest calculator works

  1. The bill’s clock

    Day 0 is the statement; the due date, the three days’ grace and the next statement follow.

    In detail
    Your spends are taken at one average date before the statement, and a cash withdrawal at its own. The due date is the number of days after the statement your bill shows. The payment lands on the day you choose, from 15 days early to 30 days late, and the interest runs to the first statement on or after it.
  2. Interest, a day at a time

    Monthly rate × 12 ÷ 365, from each purchase date, on what is outstanding.

    In detail
    Paid in full by the due date (or, at ICICI Bank and HSBC, within the grace), the spends carry no interest. Otherwise each is charged from its date to the day of payment, and what is left after the payment from then to the next statement, as paragraph 23(6) and the MITCs set out. A cash withdrawal is always charged from the day it was made. GST at 18% is added.
  3. The late fee, after three days

    Only if less than the minimum due is paid within three days of the due date.

    In detail
    The fee is your bank’s own: a slab table or a percentage with a floor and a cap, applied to the amount outstanding after the due date, as paragraph 23(5) requires. Where an MITC reads its slab on the statement balance, the calculator follows the RBI’s wording; the two differ only when a part-payment moves the bill into a lower band. GST at 18% is added, and the same three days decide the past-due report.
  4. The minimum-due trap

    Each bill’s minimum by your bank’s formula, month after month, against a fixed sum.

    In detail
    From the next bill, the calculator pays the minimum due on each due date, worked out by your bank’s rule and never less than the month’s interest, fees and GST, until the card is clear, and does the same for a fixed amount. New spends, if you enter them, carry interest from their dates while a balance is unpaid. A bill of ₹100 or less is paid in one go where the bank sets no threshold of its own; billed interest, fees and GST carry no interest.

Credit card interest and late fees: the questions people ask

How is credit card interest calculated in India?

Once a bill is not paid in full by the due date, the interest-free period is lost and interest runs from the date of each transaction at the card’s monthly rate, worked out a day at a time: the monthly rate × 12 ÷ 365, which is 0.1233% a day on a 3.75% card. Interest stops on whatever you pay from the day it is credited, and runs on the rest until it is paid (RBI Credit Card Directions, 2025, paragraph 23(6)). GST at 18% is added to the interest.

What happens if I pay only the minimum amount due?

The account stays regular, with no late fee and no past-due report, but the bill is not paid in full, so interest runs from each purchase date on the whole spend until your payment and on what is left after it. On a ₹40,000 HDFC Bank bill, paying the ₹2,000 minimum on the due date adds ₹2,590 of interest and GST to the next bill; paying only the minimum every month after that takes 15 years 10 months to clear the card, with ₹1,02,932 of interest and GST on the way.

Is there a late fee if I pay within 3 days of the due date?

No. A card-issuer may levy a late fee, or report the account to the credit bureaus as past due, only when it stays past due for more than three days, counted from the due date on the statement (paragraph 23(5)). Interest is another matter: the interest-free period needs the whole bill paid by the due date, so at most banks a full payment one to three days late still carries interest from the purchase dates, ₹2,211 with GST on a ₹40,000 bill. ICICI Bank and HSBC say in their MITCs that paying the whole bill within the three days keeps it interest-free.

How is the credit card late payment charge calculated?

By your bank’s own table, on the amount outstanding after the due date and not on the total amount due (paragraph 23(5)). HDFC Bank, ICICI Bank, Kotak, IndusInd, SBI Card and BOBCARD charge by slab, ₹100 to ₹1,300; Axis Bank charges nothing up to ₹500 and then ₹500 to ₹1,300. AU, IDFC FIRST and RBL charge 12.5% or 15% of the outstanding, capped at ₹1,300; YES Bank 10%, at most ₹1,350; HSBC the minimum due itself, between ₹250 and ₹1,200. GST at 18% is added.

Is GST charged on credit card interest and late fees?

Yes, at 18%, on the interest, the late fee and the other charges. Every MITC in the calculator applies it: most state the 18% rate, and the rest use it in their worked examples. ₹2,000 of interest costs ₹2,360 with GST.

What is the interest-free period on a credit card?

The time from a purchase to the due date of the bill it appears on, usually 20 to 50 days: a purchase on the first day of the billing cycle gets the most, one on the statement date the least. The RBI defines it as available only when the entire outstanding is paid on or before the due date (paragraph 2(16)). It is lost on the whole bill if you pay in part, and while any part of the previous bill is unpaid, new purchases get none either (paragraph 23(3)). A cash withdrawal never has one.

Do new purchases carry interest if I have an unpaid balance?

Yes. The MITC must say that the interest-free period is suspended while any balance of the previous month’s bill is outstanding (paragraph 23(3)), so every new purchase carries interest from its own date until the card is cleared. Every bank in the calculator says so in its MITC.

How is the minimum amount due calculated?

Each bank sets its own formula, but it must cover the month’s interest, fees and taxes, so that the balance cannot grow while you pay the minimum (paragraph 23(2)). SBI Card asks all of the GST, fees and interest plus 2% of the rest, at least ₹200; HDFC Bank and ICICI Bank 5% of spends and interest plus GST and fees, rounded up to ₹10; Kotak and HSBC all the charges plus 1%. On a fresh ₹40,000 bill that is ₹2,000 at HDFC Bank, ₹800 at SBI Card and ₹400 at Kotak.

How long does it take to pay off a credit card paying only the minimum?

Years. A ₹40,000 bill at 3.75% a month, paid at the minimum from the first bill on with no new spends, takes 15 years 10 months at HDFC Bank, 12 years 9 months at SBI Card and 28 years 9 months at Kotak, because the minimum is mostly interest. Paying ₹5,000 a month instead clears it in 10 months.

What is the interest on a credit card cash withdrawal?

Interest from the day of the withdrawal at the card’s rate, with no interest-free period even if the bill is paid in full, and a cash advance fee, usually 2.5% with a minimum of ₹500 (YES Bank ₹650, IndusInd ₹300, IDFC FIRST a flat ₹199), with GST on both. ₹10,000 withdrawn 10 days before the statement and repaid in full on the due date costs ₹436 of interest and GST, besides the ₹500 fee and its ₹90 GST.

Does paying only the minimum due hurt my credit score?

Paying at least the minimum within three days of the due date keeps the account regular, so it is not reported as past due. Paying less, or later, lets the bank report it as past due, with the days counted from the due date, and since 1 July 2026 lenders report to the credit bureaus as on the 9th, 16th and 23rd and the last day of each month.

What is the APR on a credit card?

The annualised rate a card-issuer must quote for purchases, cash and late payment (paragraph 23(1)). Most quote 3.75% a month as 45% a year, twelve times the monthly rate; Axis Bank prints 55.55%, the same 3.75% compounded month on month. With 18% GST on the interest, 3.75% a month costs 53.1% a year before any compounding.

Can the bank charge interest on GST, fees or the late fee?

No. Paragraph 23(2) bars a card-issuer from levying interest or other charges on unpaid taxes, levies and charges, and the minimum due must be set so that they are not capitalised. Interest is on purchases, cash and balances carried, not on the GST or the fees.

How can I avoid credit card interest?

Pay the whole total amount due by the due date every month; an auto-debit for the full amount, not the minimum, does it for you. If you cannot, pay as much as you can as early as you can, since interest stops on every rupee from the day it is credited; stop using the card until it is cleared; and do not withdraw cash on it. A loan at a lower rate, or the card’s own EMI conversion, can cost less than carrying the balance, as its rate and processing fee will show.

See also the guide RBI’s credit card rules: the 3-day grace, weekly credit reports and the bundling ban, the CardWise credit card finder, the EMI calculator for a loan to clear the card, the loan eligibility calculator, or all calculators.

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