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Finance Calculators

Credit Card Interest Calculator

Verified formula Updated Jun 2026 Private — runs on your device

Enter details
₹
%
Verified formula Private

Interest accrued

₹21,288

Total owed
₹71,288

For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.

How to use the Credit Card Interest Calculator

The Credit Card Interest Calculator works out your interest accrued, along with 1 related figure in an instant. Enter card balance, annual interest rate (apr) and months unpaid and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.

  1. Enter the card balance.
  2. Enter the annual interest rate (apr).
  3. Enter the months unpaid.
  4. Read off your interest accrued, together with total owed — the calculator updates automatically, with no button to press.

Formula

The Credit Card Interest Calculator uses the formula:

Interest accrued = Card balance × (1 + Annual interest rate (APR) ÷ 100 ÷ 12)^(Months unpaid) - Card balance

Worked example

For example, with card balance of ₹50,000, annual interest rate (apr) of 36% and months unpaid of 12, the interest accrued is ₹21,288.

Inputs used
Card balance ₹50,000
Annual interest rate (APR) 36%
Months unpaid 12
Results
Interest accrued ₹21,288
Total owed ₹71,288

Results are estimates for educational use, not professional advice.

Key terms explained

Interest rate
The percentage charged on a loan or paid on savings, usually quoted per year (per annum).

Frequently asked questions

Interest compounds monthly at the APR ÷ 12. A 50,000 balance at 36% APR left unpaid for 12 months grows by about 21,288 in interest.

Card APRs are among the highest forms of borrowing, and because interest compounds monthly, balances grow quickly if unpaid.

Pay the full statement balance by the due date. Within the interest-free period, purchases then carry no interest.

No. The minimum payment barely covers interest, so the balance and interest keep growing. Pay as much as you can.

Enter the card balance. Enter the annual interest rate (apr). Enter the months unpaid. Read off your interest accrued, together with total owed — the calculator updates automatically, with no button to press.

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