Loans
Credit Card Interest Explained: The Real Cost of Paying the Minimum
How card interest and GST are charged, what paying only the 5% minimum really costs, and cheaper ways to clear a balance.
By Team Vind · Updated · 5 min read
A credit card is free money for up to 50 days, as long as you pay the full bill by the due date. Pay any less and it becomes the most expensive loan most people ever take: about 45% a year, plus GST. Here's exactly how the interest is charged, and how to get out of a card balance.
How credit card interest works
Monthly charge = balance × monthly rate (about 3.75%) + 18% GST on that interest
On a ₹50,000 balance at 3.75% a month, the first month's interest is ₹1,875, plus ₹338 GST. Because unpaid interest is added to the balance, it compounds: 3.75% a month plus GST works out to about 68% a year.
Three rules that catch people out
- Interest runs from the purchase date, not the due date, once you don't pay in full.
- No interest-free period on new spending while a balance is carried. New purchases start charging interest straight away.
- Cash withdrawals are charged interest from day one, plus a fee of about 2.5%.
The minimum due trap
The minimum due is usually 5% of the balance. Paying only that on ₹50,000, and spending nothing more, takes 30 years 5 months to clear, and costs ₹2,61,433 in interest and GST. You'd pay ₹3,11,433 in total for ₹50,000 of shopping. In the first year alone, ₹25,418 of the payments go to interest and GST.
Try it: Credit Card Interest Calculator
Paying Only the Minimum
- Balance₹50,000(16%)
- Interest + GST₹2,61,433(84%)
Year by year
| Year | Paid so far | Interest + GST so far | Balance left |
|---|---|---|---|
| 1 | ₹29,991 | ₹25,418 | ₹45,426 |
| 2 | ₹57,239 | ₹48,510 | ₹41,271 |
| 3 | ₹81,995 | ₹69,490 | ₹37,496 |
| 4 | ₹1,04,485 | ₹88,551 | ₹34,066 |
| 5 | ₹1,24,919 | ₹1,05,869 | ₹30,950 |
| 6 | ₹1,43,483 | ₹1,21,602 | ₹28,119 |
| 7 | ₹1,60,350 | ₹1,35,896 | ₹25,546 |
| 8 | ₹1,75,673 | ₹1,48,883 | ₹23,210 |
| 9 | ₹1,89,595 | ₹1,60,681 | ₹21,086 |
| 10 | ₹2,02,243 | ₹1,71,401 | ₹19,158 |
Cheaper ways out
| Option | Typical rate | Interest on ₹50,000 over 12 months |
|---|---|---|
| Card EMI conversion | 16% a year + fee | ₹4,439 + GST |
| Personal loan | 12% a year | ₹3,309 |
| Balance transfer to another card | Low or 0% for a few months, + fee | Varies |
| Minimum due only | 45% a year + GST | ₹2,61,433 (over 31 years) |
Any of these beats revolving at 45%. Then stop using the card until the balance is cleared, or you'll lose the interest-free period on new spending.
Paying off several debts? See how EMI is calculated, or compare options with the personal loan EMI calculator.
Frequently asked questions
What is the interest rate on credit cards in India?
Usually 3% to 3.75% a month (36–45% a year), plus 18% GST on the interest.
Is interest charged if I pay the minimum due?
Yes, on the whole balance from each purchase date, and new purchases lose their interest-free period until you pay in full.
How can I avoid credit card interest?
Pay the total amount due, not the minimum, by the due date every month, and avoid cash withdrawals.
Is converting to EMI a good idea?
Yes, compared with revolving the balance. EMI rates are often 13–20% a year plus a fee and GST, far lower than 40%+.
These results are estimates for planning only, not financial, investment or tax advice. Rates and rules change, and your bank, fund house or employer may calculate slightly differently. Check with them or a qualified adviser before you decide.
Sources
- Reserve Bank of India: Master Direction on Credit Card and Debit Card Issuance and Conduct, 2022
- Card issuers' most important terms and conditions (MITC): finance charges and minimum amount due
Last reviewed: 10 October 2026