Revolving credit: the real cost of carrying a balance at 40-plus percent APR

Revolving credit: the real cost of carrying a balance at 40-plus percent APR

Published: 19 October 2026

Category: how-to-guides | cardbuzz

"Revolving credit" sounds like a feature. It is a loan — the most expensive mainstream loan available to Indian consumers, priced at 36–48% per year, often presented without the word "loan" anywhere on the statement. This guide puts the real numbers on carrying a balance.

What revolving actually means

When you pay less than the total amount due, the unpaid balance "revolves" to the next cycle. From that moment, three things happen simultaneously:

1. Interest accrues daily on the outstanding balance at the card's finance charge rate.
2. The interest-free period vanishes — new purchases accrue interest from their transaction dates.
3. GST at 18% applies on the interest charged.

The finance charge is set per card and disclosed in the MITC (Most Important Terms and Conditions). Typical 2026 ranges across major Indian issuers:

(Ranges per 2026 MITC aggregations — Paisabazaar, Bajaj Finserv Markets. Your card's exact rate is in its MITC; premium cards sometimes carry lower rates, e.g., HDFC Infinia-class cards at the bottom of HDFC's range.)

Note: unlike personal loans, credit card finance charges are generally not linked to your credit score — the card has a preset rate applied uniformly. Your score does not earn you a discount here.

The cost curve: what balances actually cost per year

At 3.75% per month (45% annual), the annual interest on a carried balance — before GST — is straightforward:

Carrying ₹1 lakh for a year costs over ₹53,000 — more than half the principal, in interest alone. Compare: a personal loan at 12% would cost roughly ₹12,000 + GST on the same balance. The card is charging you four times the personal-loan rate for the convenience of not applying.

How interest is actually computed (the part statements hide)

Banks compute interest on the average daily balance method: each day's outstanding balance × (monthly rate × 12 ÷ 365), summed across the cycle. Two subtleties matter:

• Interest runs from the transaction date, not the due date. Once you revolve, the grace period is gone, so a purchase made on the 2nd accrues interest from the 2nd — even if you pay that specific purchase's amount later in the month.
• Payments are applied in a defined order (usually: fees and interest first, then older balances). Your payment reduces the interest-bearing balance only after covering accrued charges — another reason minimum payments barely dent principal.

The revolving trap cycle

The trap has a recognizable shape:

1. Month 1: revolve ₹40,000 (emergency).
2. Month 2: interest + GST adds ~₹1,770; new spending of ₹25,000 (no grace period) adds ~₹1,100 more in interest.
3. Month 3: the statement is now bigger than month 1's, despite no new emergency. Minimum payments cover interest but not principal.
4. Month 6: the balance has grown, utilization is high (hurting the CIBIL score), and the card feels "maxed out."

Breaking the cycle requires stopping new card spending first — every new purchase while revolving is borrowed at 45% from day one.

Revolving vs EMI conversion: the direct comparison

Banks often offer to convert an outstanding balance (or a large purchase) into an EMI plan instead of letting it revolve. The difference is stark. Take ₹1,00,000: revolving at 3.75%/month costs roughly ₹53,100 a year including GST, with no fixed end date. A 12-month EMI conversion at 1.5%/month (18% annual) costs roughly ₹19,500 in total interest including GST — and it ends in 12 months by construction. EMI conversion is still debt at a high rate, but it is less than half the cost of revolving and it forces a payoff date. If your bank offers conversion on an already-revolved balance, take it over continued revolving every time — then stop new spending on that card until the EMI ends.

Cheaper alternatives, ranked

If you must carry a balance, do not carry it on the card:

1. Balance transfer to another card — many issuers offer 6–12 month transfers at 0.99–1.5% per month. Still debt, but at a third of the cost.
2. Personal loan — 10–15% per annum, fixed schedule, forced payoff date. Psychologically superior: it ends.
3. Card EMI conversion — 12–24% per annum on eligible purchases. More expensive than a personal loan, far cheaper than revolving.
4. Employer advance / liquidating low-yield savings — even breaking an FD (losing ~1% penalty plus foregone interest) is cheaper than 45%.

Bottom line

Revolving credit is a 36–48% annual loan with 18% GST on the interest and no grace period on new spending. A ₹1 lakh carried balance costs over ₹53,000 a year. If you must borrow, borrow anywhere else — a personal loan, a balance transfer, even breaking an FD — before you revolve on the card.

Sources: Paisabazaar credit card interest-rate tables 2026; Bajaj Finserv Markets rate comparison 2026; CardBuzz database Oct 2026 (e.g., IDFC FIRST WOW! Black at 3.99%/month, 47.88% annual); RBI Master Direction on Credit & Debit Cards 2022.