FD Calculator — Fixed Deposit Interest & Maturity

What is a Fixed Deposit and Why Does Interest Calculation Matter?

A Fixed Deposit (FD) is one of the safest investment instruments available in India. You deposit a lump sum with a bank or NBFC for a fixed tenure — ranging from 7 days to 10 years — and earn a guaranteed interest rate. Unlike market-linked investments, FD returns are completely predictable. However, understanding how much you will actually receive at maturity requires accurate interest calculation that accounts for compounding frequency.

Simple Interest vs. Compound Interest on FDs

Most bank FDs use compound interest, typically compounded quarterly. This means interest earned each quarter is added to your principal before the next quarter's interest is calculated. Over a long tenure, this compounding effect significantly boosts your returns compared to simple interest. Our FD Calculator uses the standard compound interest formula:

A = P × (1 + r/n)^(n×t) — where P is the principal, r is the annual interest rate (as a decimal), n is the compounding frequency per year (4 for quarterly), and t is the tenure in years.

FD Interest Rates in India (2025)

Interest rates vary significantly across banks and FD types. As of 2025, regular citizen FD rates typically range from 6.5% to 7.5% per annum for tenures of 1–3 years at major banks. Senior citizens (60+ years) receive an additional 0.25% to 0.75% over the regular rate — making FDs particularly attractive for retirees seeking stable income. Small Finance Banks and certain NBFCs offer rates as high as 8.5% to 9.5%, though these carry higher risk.

Tax Treatment of FD Interest

FD interest is fully taxable as "Income from Other Sources" under the Income Tax Act. Banks deduct TDS (Tax Deducted at Source) at 10% if your annual FD interest exceeds ₹40,000 (₹50,000 for senior citizens). If your total income is below the taxable limit, you can submit Form 15G (or Form 15H for seniors) to avoid TDS deduction. Factor this into your effective return when comparing FDs with tax-saving instruments like PPF or ELSS.

How to Use the FD Calculator

• Enter your principal amount (minimum ₹1,000 at most banks)
• Enter the annual interest rate offered by your bank
• Select the tenure in years and months
• Choose your compounding frequency (quarterly for most Indian banks)
• The calculator instantly shows your maturity amount and total interest earned

FD vs. Other Investment Options

While FDs offer safety and guaranteed returns, they may not beat inflation over long periods. Compare your post-tax FD return with alternatives like PPF (7.1% tax-free, 15-year lock-in), debt mutual funds, and SIP investments before making a decision. For short-term goals (1–3 years), FDs remain an excellent low-risk option.