10 Credit Card Rules You Must Know to Stay Out of Trouble

The rules that protect you and your money

Credit cards have rules — most are obvious, some are easy to forget, and a few can cost you thousands of rupees if broken. Here are the 10 rules every Indian cardholder must know.

Rule 1: pay the full statemented balance every cycle

The single most important rule. If you don't pay the full statemented balance:

• Finance charge applies (3.5%–4.25% per month = 42%–51% per annum).
• The grace period disappears for subsequent purchases.
• Your credit score drops 20–50 points.

Pay the full statemented balance by the due date. Every cycle. Without exception.

Rule 2: never share your PIN, OTP, or CVV

No bank or merchant will ever ask for your PIN, OTP, or CVV. Anyone who does is a fraudster. The bank verifies your identity with the card, the OTP, and your personal details — they never need your PIN to verify.

If someone calls claiming to be from your bank and asks for your PIN: hang up. Call the bank's official customer care directly.

Rule 3: hotlist immediately on loss or theft

The 3-day zero-liability window for fraud starts at the time you reasonably discovered the loss. Proving you discovered the loss on day 1 is much easier if you hotlisted on day 1.

Hotlist via:

• Bank's 24×7 customer care.
• The bank's app.
• SMS to the bank's hotlist number.
• The bank's IVR.

Hotlisting takes 60 seconds. Delay costs money.

Rule 4: keep your balance below 30% of your credit limit

Credit utilisation is 30% of your CIBIL score. The threshold: keep your outstanding balance below 30% of your total credit limit. Below 10% is optimal.

If your limit is ₹1 lakh, keep your balance below ₹30,000. Pay before the statement date if you need to.

Rule 5: use the credit card for purchases, not cash advances

The cash advance fee (2.5%–3.5%) and cash advance interest (2.5%–3.5% per month from day one) are brutal. The grace period doesn't apply.

Use a debit card or a personal loan for cash. Reserve credit cards for purchases.

Rule 6: enable transaction alerts for every transaction

The fastest fraud detection is the alert. Most banks let you set alerts for every transaction (above ₹1). Enable this in your bank's app.

If you see a transaction you didn't make, file a dispute within 3 days.

Rule 7: read your monthly statement

The 5 minutes spent reading your monthly statement is the cheapest fraud-prevention tool available:

• Verify all transactions are yours.
• Check reward points are correctly credited.
• Spot unfamiliar merchants.
• Confirm the closing balance is right.

Dispute errors within 7 days.

Rule 8: pay by the due date, not just by the minimum amount due

Paying only the minimum avoids the late fee but finance charges continue to accrue. The minimum is a trap, not a feature.

Set up auto-pay for the full statemented balance. The bank will pay on time, every time.

Rule 9: don't close your oldest credit card

Your credit history length is the third-biggest factor in your CIBIL score. Closing your oldest card shortens your credit history.

Keep your oldest card active, even if you don't use it much. A small monthly charge (₹100 utility bill) is enough.

Rule 10: file disputes in writing, not just by phone

A verbal dispute over the phone is logged by the bank, but a written dispute (via the app or email) creates a permanent record. The record matters if you escalate to the Nodal Officer or the Banking Ombudsman.

Use the bank's app's dispute form. It's faster, creates a record, and triggers the RBI's 90-day timeline.

Bonus rule 11: read the MITC

The MITC (Most Important Terms and Conditions) is the bank's binding contract. Read it once when you activate the card. Re-read it when the bank sends a "change in terms" notice.

The MITC tells you:

• Every fee the bank can charge.
• The finance charge rate.
• The reward programme terms (expiry, inactivity, transfer).
• The dispute resolution rules.

The MITC is your reference for every dispute.

Bonus rule 12: don't apply for multiple cards in a short window

Each credit-card application is a "hard inquiry" on your CIBIL report. Multiple applications in 30 days can drop your score 20–50 points.

Wait 3–6 months between credit-card applications.

The 12 rules, summarised

1. Pay full balance every cycle.
2. Never share PIN, OTP, CVV.
3. Hotlist immediately on loss.
4. Keep utilisation below 30%.
5. Use for purchases, not cash advances.
6. Enable alerts for every transaction.
7. Read your monthly statement.
8. Pay by due date, full amount.
9. Don't close your oldest card.
10. File disputes in writing.
11. Read the MITC.
12. Don't apply for multiple cards in 30 days.

Follow these 12 rules and you'll avoid 99% of common credit-card mistakes.

The bottom line

Credit-card rules exist to protect you and the bank. The rules are simple: pay in full, don't share secrets, monitor your account, dispute in writing. Following the rules keeps your credit score high, your fees low, and your money safe. The discipline: set up auto-pay, enable alerts, read the statement, and read the MITC once. The 5 minutes a month spent on these is the cheapest financial protection you have.