🏧 FD Calculator

Calculate Fixed Deposit maturity amount and interest earned.

Calculate Now

What is a Fixed Deposit (FD) Calculator?

A Fixed Deposit (FD) is one of the safest investment options in India, offered by banks and NBFCs like SBI, HDFC, ICICI, and Post Office schemes. You deposit a lump sum for a fixed tenure at a fixed interest rate, and the bank pays you back the principal plus interest at maturity. This FD Calculator instantly shows your maturity amount and total interest earned, based on quarterly compounding — the method most Indian banks use.

FD Maturity Formula

Banks in India typically compound FD interest quarterly. The formula used is:

A = P × (1 + r/4)4×t

Where A = Maturity amount, P = Principal (deposit amount), r = Annual interest rate (as a decimal), and t = Tenure in years.

Worked Example

Suppose you deposit ₹1,00,000 in a bank FD at 7.5% p.a. for 3 years, compounded quarterly:

  • Principal: ₹1,00,000
  • Maturity Amount: ≈ ₹1,24,988
  • Interest Earned: ≈ ₹24,988

This is noticeably higher than simple interest (which would give only ₹22,500 interest over the same period) because quarterly compounding lets your interest earn interest too.

How to Use This Calculator

  1. Enter your deposit amount (Principal) in rupees.
  2. Enter the interest rate offered by your bank (usually 6.5%–8% p.a. for a regular FD, higher for senior citizens).
  3. Enter the tenure in years.
  4. Click Calculate to instantly see your maturity amount and interest earned.

Things to Know About FDs in India

  • TDS: Banks deduct 10% TDS if your total FD interest exceeds ₹40,000/year (₹50,000 for senior citizens) in a financial year.
  • Premature withdrawal: Most banks charge a 0.5%–1% penalty on the interest rate if you break the FD early.
  • Senior Citizen FDs: Banks usually offer 0.25%–0.75% higher interest rates for senior citizens.
  • Tax-saving FD: A 5-year tax-saving FD qualifies for deduction under Section 80C (up to ₹1.5 lakh), but the interest earned is still taxable.
💡 Tip: If you don't need the payout immediately, choosing a cumulative FD (interest reinvested, paid at maturity) usually gives a better effective return than a non-cumulative FD (interest paid out monthly/quarterly).

Also check our RD Calculator if you'd rather invest monthly instead of a lump sum, or the Compound Interest Calculator for general compounding math.

📅 Last reviewed: July 2026 · Formulas verified against RBI/SEBI/IT Dept guidelines.