Credit Card Interest Calculator India

Estimate the short-term cost of carrying part of a credit-card statement balance. Enter the payment, annual finance-charge rate, days carried, and GST rate to see an indicative charge.

Estimate the cost of carrying a balance

Statement and payment details

billed
Enter the total amount due on the statement.
paid
The balance cannot fall below zero in this estimate.
% p.a.
Use the finance-charge APR in the card terms.
days
Use the estimated number of days until payment.
%
Update if the applicable indirect-tax rate changes.

Estimated outcome

Estimated finance charge plus GST

₹0
Balance carried forward
—
Estimated finance charge
—
GST on finance charge
—
Balance after estimated cost
—

Uses a daily-rate estimate on the unpaid statement balance only. Issuers may charge from transaction dates and include new purchases, cash advances, fees, or different day counts.

What this calculator shows

  • Statement balance left unpaid.
  • Estimated finance charge for the selected days.
  • GST on that finance charge.
  • Indicative balance after adding the estimated cost.

Credit-card interest formula

The calculator uses a simple daily-rate estimate:

Credit-card interest formulas
  • Unpaid balance = max(statement balance – payment, 0)
  • Finance charge = unpaid balance x annual rate / 365 x days
  • GST = finance charge x GST rate

For example, carrying Rs. 38,000 for 30 days at 42% a year produces an estimated finance charge of about Rs. 1,312 before GST.

Why the actual statement can cost more

When the total amount due is not paid, many issuers withdraw the interest-free period and calculate finance charges from individual transaction dates, not merely on the post-payment balance for 30 days. New purchases, cash advances, fees, taxes, different day counts, and payment-allocation rules can increase the amount.

This tool does not recreate a card issuer’s transaction-level ledger. Use the most important terms and conditions, tariff sheet, and next statement for the contractual amount.

Read Paisaseed’s guide to minimum amount due and credit-card interest before treating the minimum payment as a repayment plan.

Common questions

Does paying the minimum amount avoid interest?

Generally no. It may help avoid immediate late-payment treatment when paid by the due date, but the remaining balance can attract high finance charges and the interest-free period may be lost.

Is GST charged on the principal balance?

This calculator applies GST only to the estimated finance charge. Issuer fees can also attract GST separately.

Why use APR instead of the monthly rate?

APR enables a daily estimate. If the card discloses only a monthly rate, use its officially stated annual equivalent or verify the issuer’s own calculation method.

More calculators

Use the no-cost EMI calculator to expose processing fees and lost discounts, the personal loan EMI calculator for instalment borrowing, or the salary budget calculator to plan full-balance repayment.