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Compound Interest Calculator

FD, RD & compounding growth — 100% free, runs in your browser

About the Compound Interest Calculator

Compounding means earning returns on your returns. How often that compounding happens changes the outcome more than most people expect — quarterly compounding beats annual on the same nominal rate. Use this for fixed deposits, recurring deposits and any savings product.

How to use it

  1. Enter the principal amount.
  2. Enter the annual interest rate.
  3. Enter the duration in years.
  4. Choose the compounding frequency.
  5. Read the maturity amount and interest earned.

Common questions

Does compounding frequency really matter?

Yes. On a long deposit, quarterly compounding produces noticeably more than annual at the same rate. Always check the frequency before comparing two offers.

How is this different from simple interest?

Simple interest is earned only on the original amount. Compound interest is earned on the accumulated total, so it accelerates over time.

Is the interest taxable?

Interest from fixed deposits is added to your income and taxed at your slab rate. TDS applies above certain thresholds.

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