A fixed deposit is the savings product most Indian families trust with their serious money. You park a lump sum with a bank for a fixed tenure — anywhere from 7 days to 10 years — and the bank pays a fixed interest rate that does not change even if market rates fall later. That certainty is the whole appeal: on the day you open the FD, you know almost exactly what you will get back, which makes FDs ideal for goals with a fixed deadline and zero tolerance for surprises, like a child’s college admission two years away or a parent’s medical reserve.
The quiet engine behind FD growth is quarterly compounding: every three months, earned interest joins your principal, and the next quarter compounds on that larger amount. Over five years this snowball adds a meaningful bonus over simple interest. Senior citizens typically earn 0.25% to 0.50% extra — add it to the rate you enter if it applies to you.
This FD calculator applies the standard compound-interest formula with quarterly compounding, the method most Indian banks use. Enter your deposit amount, the annual rate and the tenure, and it shows the maturity value and total interest earned. As with all such tools, treat the figure as a planning estimate — your bank’s exact payout may differ slightly on rounding and payout terms — and confirm before committing a large sum.
How it works
The calculator uses the compound interest formula: maturity value = P × (1 + r/f)^(f×t), where P is your deposit, r is the annual interest rate as a decimal, f is the number of times interest compounds per year (4 for quarterly), and t is the tenure in years. With quarterly compounding, a ₹1,00,000 deposit at 7% for 5 years grows to about ₹1,41,478 — roughly ₹1,478 more than you would get if the bank paid simple interest on the same rate, purely from the compounding effect.
A few practical details shape the real payout. First, the rate is locked for your tenure, so you are protected if rates fall but also miss out if they rise — some depositors split large sums across tenures to hedge this. Second, banks deduct TDS when yearly interest crosses the threshold (higher for senior citizens), and the interest is taxable at your slab rate regardless of TDS. Third, the popular 5-year tax-saving FD qualifies for 80C deduction up to ₹1.5 lakh, but locks your money for the full five years with no premature withdrawal. Keep these in mind when you compare the calculator’s pre-tax figure with what you will actually receive.
How to use this tool
- Enter the lump sum you want to deposit, for example ₹1,00,000.
- Enter the annual interest rate — add the senior citizen bonus (usually 0.25–0.50%) if it applies to you.
- Select the tenure in days, months or years.
- Click Calculate to see the maturity value and total interest earned.
- Try different tenures to see how compounding rewards longer commitments.
- Compare a couple of banks' rates, then confirm the exact payout with your chosen bank.
Practical tips
- Don't park emergency money in a long FD — premature withdrawal usually costs about 1% in interest rate plus possible fees.
- Ladder large sums across 1, 3 and 5-year FDs so some money frees up regularly while most of it earns higher long-term rates.
- Remember the figure is pre-tax; at a 30% slab, nearly a third of the interest goes to tax.
- Check DICGC insurance — deposits up to ₹5 lakh per depositor per bank are insured, so split very large sums across banks.
Frequently asked questions
How does quarterly compounding affect my FD?
With quarterly compounding, each quarter's interest is added to your principal, so the next quarter earns interest on a slightly larger amount. Over a multi-year FD this snowball effect adds up noticeably — on a 5-year deposit it typically adds around 1–1.5% extra versus simple interest. This calculator applies quarterly compounding, matching how most Indian banks compute FD interest.
What happens if I break an FD early?
Banks permit premature withdrawal but reduce the interest rate, usually by about 1% from the contracted rate, and may charge a small penalty. You still get your principal back. Because of this penalty, keep a separate emergency fund in savings or a short FD so you rarely need to break a long-term deposit.
Is FD interest taxable?
Yes. FD interest is fully taxable at your income tax slab rate, and banks deduct TDS when the interest exceeds the yearly threshold. Senior citizens get a higher TDS threshold and a deduction on interest income under current rules. The maturity value shown here is before tax, so reduce it by your slab rate for the real in-hand figure.
What is a tax-saving FD?
A 5-year tax-saving FD qualifies for deduction up to ₹1.5 lakh under Section 80C of the old tax regime. The trade-off is a strict 5-year lock-in with no premature withdrawal allowed. It suits conservative taxpayers who have exhausted other 80C options, but the interest earned is still fully taxable.
Are small finance banks safe for FDs?
Small finance banks are regulated by the RBI and covered by DICGC insurance up to ₹5 lakh per depositor per bank, just like big banks — but they often pay 1–2% higher rates to attract deposits. Within the insured limit, the risk is comparable; above it, stick to well-established banks or split across institutions.
FD vs RD — which earns more?
For the same rate and tenure, an FD of the full amount earns more than an RD of equivalent monthly deposits, simply because the entire sum compounds from day one. The choice isn't really about returns though — it's about cash flow: FD for money you already have, RD for money that arrives monthly as salary.
Note: Results are estimates based on standard quarterly compounding; actual payouts depend on your bank's terms, rounding and premature-withdrawal rules. Interest earned is fully taxable — this is not financial advice.