Credit Card Interest Calculator

Credit Card Interest Calculator — What Carrying a Balance Actually Costs You

Credit card interest in India is some of the most expensive money you can borrow. Most banks charge between 3 and 3.5 percent per month, which translates to an effective annual rate of 42 to 45 percent. That is not a typo. And because of how the interest is calculated, even carrying a balance for a few months can cost you far more than most people realise.

This calculator shows you the total interest you will pay on your outstanding balance, how many months it will take to clear it at your chosen monthly payment, and your total outgo. Enter your outstanding balance, the monthly interest rate, and the amount you can pay each month.

How Credit Card Interest Is Actually Calculated

Here is the detail that catches most cardholders off guard. If you pay less than the full statement amount — even by a small amount — most Indian banks charge interest on the full outstanding balance from the date of each original transaction, not from the billing date. This means a partial payment does not give you any interest-free period on new purchases either. The interest clock is running on everything.

Paying even 90 percent of your bill and leaving 10 percent unpaid can result in interest charges on the full amount. Always clear the full statement balance before the due date if you want to avoid any interest whatsoever.

The Minimum Payment Trap — Why It Costs So Much

Credit card companies set the minimum payment low on purpose. Paying only the minimum — usually 5 percent of the balance or ₹200, whichever is higher — keeps you in debt for an extraordinarily long time. On a ₹1 lakh balance at 3.5 percent monthly interest, paying only ₹5,000 per month takes over 27 months to clear and costs you more than ₹34,000 in interest. Nearly a third of the original debt paid as pure interest, just for the slow repayment choice.

Effective Annual Rate vs Monthly Rate

Banks advertise credit card interest as a monthly rate — 3% per month sounds almost manageable. But compounded over 12 months, 3% monthly becomes 42.6% annually. Understanding this conversion is important because it lets you compare credit card debt fairly against other borrowing options. Personal loans at 16% per annum are actually cheaper than credit card interest at 36% per annum — not a comparison most people make intuitively.

The Fastest Way Out of Credit Card Debt

Pay the maximum you can afford every month, well above the minimum. If you have balances across multiple cards, direct all extra payments to the card with the highest interest rate first — clear it fully, then move to the next. This avalanche method minimises total interest paid. Once you are out of credit card debt, the only sustainable approach is to pay the full bill every single month without exception.

Disclaimer: Credit card interest rates vary by bank and card type. Check your cardholder agreement for the exact rate applicable to your card.