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Overdraft Interest Calculator

Estimate interest on an overdraft or credit line for the days used.

Last updated: 20 Aug 2026

Quick answer

Overdraft interest is charged only on the amount used, for the days used: interest = amount × rate ÷ 100 × days ÷ 365. For example, ₹1,00,000 at 12% for 30 days is about ₹986. Enter the amount, rate and days above.

₹
% p.a.

An overdraft charges interest only on the amount used and for the days used: interest = amount × rate ÷ 100 × days ÷ 365.

How to calculate overdraft interest

  1. 1 Enter the overdrawn amount.
  2. 2 Enter the annual interest rate and the number of days used.
  3. 3 We compute the interest for that period.

Frequently asked questions

How is overdraft interest charged?
Only on the utilised amount and for the days used, unlike a term loan where interest runs on the whole principal.
Is overdraft cheaper than a personal loan?
It can be if you use it briefly, since you pay interest only for the days used; rates are often floating.
Are there other charges?
Yes — processing/renewal fees may apply; check your facility terms.

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