Credit card interest in India is calculated daily on your outstanding balance at rates of 36–42% per annum. The critical rule: if you do not pay the full statement balance by the due date, you lose the grace period — meaning interest applies from the original transaction date, not just on the unpaid...
30-DAY INTEREST CHARGE
₹1,479.45
₹49.32/day · ₹1,500.00/month
DAILY INTEREST
₹49.32
30-DAY INTEREST
₹1,479.45
MONTHLY INTEREST
₹1,500.00
ANNUAL INTEREST
₹18,000
DAILY RATE BREAKDOWN
⚠ Tip: Pay full balance by due date to pay ₹0 in interest
Even partial payment means interest from original transaction date
Simple mode: enter your outstanding balance, annual interest rate, and number of days (or use the monthly toggle). Best for: estimating interest on a rolling balance.
Partial payment mode: enter your full statement balance, how much you paid, and the billing cycle length. See the total interest charged including the lost grace period on the paid portion.
Daily mode: add each purchase with its amount and how many days before the due date it was made. The calculator applies daily interest to each transaction from its exact date — giving you the precise interest charge you will see on your next statement.
Cash advance: enter cash withdrawal amount, the cash advance rate (typically 2.5–3.5% per month), and a one-time fee. Cash advances have no grace period — interest starts from Day 1.
Riya has a ₹50,000 statement balance at 36% p.a. She pays ₹20,000 by the due date (leaving ₹30,000 outstanding). Because she did not pay in full, she loses the grace period. Interest charges: (1) Interest on ₹30,000 outstanding for 30 days = ₹887.67. (2) Interest on the ₹20,000 she paid, for 15 days (average transaction age) = ₹295.89. Total interest on her next statement: ₹1,183.56 — not just on the ₹30,000 she owes, but on the full ₹50,000 for part of the cycle. This is the "lost grace period" trap most cardholders are unaware of.
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Daily interest = balance × annual rate ÷ 365 · Partial payment = lost grace period on entire statement · Cash advance: no grace, fee from Day 1 · Last updated: 29 April 2026 · Eagle-eyed accuracy for every calculation.