Credit Card Interest Calculator
Payoff time and interest when you pay only the minimum due.
Most Indian cards charge 2.5–3.75% a month (about 30–45% a year).
Add 18% GST on interest
Optional
Your result
—
Enter your numbers to see the result.
This credit card interest calculator shows what happens when you carry a balance and pay only the minimum amount due. It estimates how many months it takes to clear the balance and how much interest and GST you pay along the way. Add a fixed monthly payment to see how much faster you can be debt-free.
What is a Credit Card Interest Calculator?
When you do not pay your full credit card bill by the due date, the card company charges interest on the unpaid amount. In India this is usually 2.5–3.75% a month, which works out to roughly 34–55% a year once compounded. GST of 18% is also charged on that interest.
The minimum amount due, often 5% of the balance, is the least you must pay to avoid a late fee. It is not designed to clear your debt quickly. Because interest keeps getting added, paying only the minimum can stretch a small balance over years. This credit card interest calculator shows exactly how long and how expensive that is.
How does the Credit Card Interest Calculator work?
The calculator simulates your card month by month. Each month it adds interest at the monthly rate, adds GST on that interest, and then subtracts your payment: either the minimum due (with a ₹200 floor) or the fixed amount you entered.
It repeats this until the balance reaches zero, and adds up the interest and GST paid. If a payment is too small to cover the monthly interest, it tells you that the balance will never come down.
How to use the Credit Card Interest Calculator step by step
- Enter your outstanding balance.
- Enter the card’s monthly interest rate from your statement or the card’s terms.
- Enter the minimum due percentage; 5% is common.
- Choose whether to add GST on interest.
- Optionally enter a fixed monthly payment to compare.
- Read the payoff time, interest, GST and savings.
Credit Card Interest Calculator example with real numbers
You carry a ₹50,000 balance on a card charging 3.75% a month, plus 18% GST on interest, and you pay only the 5% minimum due each month.
| Example input | Value |
|---|---|
| Outstanding card balance | ₹50,000 |
| Monthly interest rate | 3.75% |
| Minimum due (% of balance) | 5% |
| Add 18% GST on interest | Yes |
| Pay a fixed amount instead (optional) | ₹5,000 |
| Example output | Value |
|---|---|
| Interest + GST if you pay only the minimum | ₹2,61,433 |
| Time to clear (minimum due only) | 30 years 5 months |
| Interest | ₹2,21,554 |
| GST on interest | ₹39,880 |
| Total you repay | ₹3,11,433 |
| Effective yearly rate | 55.55% |
| With ₹5,000 a month | 1 year 2 months, interest + GST ₹17,499 |
| You save by paying the fixed amount | ₹2,43,934 |
The credit card interest calculator shows it would take 30 years 5 months to clear, with ₹2,61,433 in interest and GST. Paying a fixed ₹5,000 every month instead would save ₹2,43,934.
Key features of this Credit Card Interest Calculator
- Month-by-month payoff simulation
- GST on interest included
- Minimum-due floor of ₹200
- Fixed-payment comparison with savings
- Effective yearly rate shown
Who should use the Credit Card Interest Calculator?
Who is this Credit Card Interest Calculator for?
- Card users carrying a balance from month to month
- People deciding between minimum due and a fixed payment
- Anyone considering card EMI conversion or a personal loan to clear card debt
- Students learning why revolving credit is expensive
Practical use cases
- Seeing the true cost of a ₹50,000 balance
- Choosing a monthly payment that clears debt in a year
- Comparing card debt with a personal loan using the EMI calculator
- Explaining to a family member why minimum payments are risky
Key benefits
- Eye-opening: the total interest makes the cost real.
- Actionable: the fixed-payment comparison shows a clear way out.
- Indian context: GST and typical card rates built in.
- Private: no card details needed, just numbers.
Tips for better results
- Pay the full statement balance whenever possible to keep the interest-free period.
- If you cannot, pay as much above the minimum as you can.
- Stop using the card for new purchases while you clear a balance; new spends start charging interest at once.
- A personal loan at a much lower rate can be cheaper than revolving card debt.
Common mistakes to avoid
- Thinking the minimum due is the amount you owe.
- Continuing to spend on a card that carries a balance.
- Ignoring GST on interest and late fees.
- Converting to EMI without checking the processing fee and interest rate.
Limitations of this Credit Card Interest Calculator
- It assumes a fixed monthly rate and no new spending.
- Card companies charge interest daily from the purchase date, which may make the real cost slightly higher.
- It does not include late fees, overlimit fees or cash advance charges.
Credit Card Interest Calculator vs other ways to calculate
| Option | Typical yearly cost | Payoff speed | Notes |
|---|---|---|---|
| Minimum due only | Highest | Very slow | Interest on full balance |
| Fixed monthly payment | High | Faster | Simple to plan |
| Card EMI conversion | Lower than revolving | Fixed tenure | Check fee and rate |
| Personal loan to repay | Often lower | Fixed tenure | Needs good credit score |
Card EMI conversion turns a purchase into fixed instalments at a lower rate than revolving interest, plus a processing fee. Run the converted rate through the EMI calculator and compare its total cost with this result.
Privacy and data handling
This Credit Card Interest Calculator runs entirely in your browser. The numbers you type are not sent to Qorico or stored on any server, and nothing is saved after you close the page. The Copy and Download buttons create the result on your own device. If the page has analytics turned on, it may count that a calculation happened, but it does not record the values you entered.
Credit Card Interest Calculator FAQs
What happens if I pay only the minimum due?
You avoid a late fee, but interest is charged on the entire outstanding balance, including new purchases, and the debt can take years to clear.
How is credit card interest calculated in India?
Interest is charged at a monthly rate, usually 2.5–3.75%, on a daily basis from the transaction date until the balance is paid. GST at 18% is charged on the interest.
Is credit card EMI conversion worth it?
It is usually cheaper than revolving the balance, but check the processing fee, interest rate and GST before you convert.
Does the interest-free period end if I carry a balance?
Yes. Most cards withdraw the interest-free period on new purchases until the full outstanding is cleared.
What is the yearly rate of 3.75% a month?
Compounded monthly, 3.75% a month is about 55.6% a year. Even 3% a month is over 42% a year.
Can RBI rules help with card interest?
RBI’s master directions on credit cards require card issuers to disclose charges clearly and not to levy charges not explicitly agreed. They do not cap interest rates.
Related tools
Sources and references
We checked the method and the current figures used in this Credit Card Interest Calculator against these official and primary sources:
Written and reviewed by the Qorico Team
