A bank fixed deposit is the simplest interest-bearing product in India — you park a lump sum for a fixed tenure at a fixed rate, the bank credits interest every quarter, and you get the lot back at maturity. This page covers the math (it's just compound interest), the tax wrinkles, and what actually happens if you break the FD early.
The formula and a worked example
FD maturity = P × (1 + r/n)^(n × t)
P — principal
r — annual rate as a decimal
n — compounding periods per year (4 = quarterly, the Indian-bank standard)
t — tenure in years
Worked example. ₹5,00,000 at 7.25% for 5 years, compounded quarterly: A = 500000 × (1 + 0.0725/4)^(4×5) = 500000 × (1.018125)^20 = ₹7,15,634. Interest earned = ₹2,15,634 over 5 years.
Why the EAR is higher than the quoted rate
Banks quote the nominal annual rate (7.25% in the example), but because interest compounds quarterly, the actual rate your money earns over a full year is slightly higher:
EAR = (1 + r/n)^n − 1
For 7.25% quarterly: EAR = (1 + 0.0725/4)^4 − 1 = 7.45%. That 0.20% gap is small, but over a 5-year ₹5L FD it's worth about ₹5,000. Always compare two FDs using EAR, not the headline nominal rate — especially when one compounds quarterly and the other monthly.
Tax: TDS, slab and Form 15G/15H
FD interest is fully taxable as 'Income from Other Sources'. It is added to your income and taxed at your applicable slab — not the LTCG / STCG rates that equity gets.
Bank deducts TDS at 10% if total FD interest from that bank in a year exceeds ₹40,000 for individuals under 60.
Threshold is ₹50,000 for senior citizens (60+).
No PAN on record → TDS jumps to 20%.
If your total annual income is below the basic exemption limit, submit Form 15G (under 60) or Form 15H (60+) to skip TDS. Even if TDS is deducted, you can claim it back as a refund when filing your ITR.
This calculator shows pre-tax maturity. To get take-home, apply your marginal slab to the interest portion.
Premature withdrawal — the rules everyone forgets
If you break an FD before maturity:
The bank pays interest at the rate applicable to the tenure actually completed, not the originally booked rate.
A penalty of 0.50%–1% is deducted from that completed-tenure rate.
Example: ₹5L booked at 7.25% for 5 years, broken at 18 months. If the bank's 18-month card rate today is 6.75%, you get 6.75% − 1% penalty = 5.75% for 18 months. Not the 7.25% you originally booked.
Tax-saver FDs (Section 80C, 5-year lock-in) cannot be broken at all. Plan tenure with a buffer or use a sweep-in / flexi-FD for emergency liquidity.
Educational only — not financial or tax advice.
Step-by-step usage
Enter the FD details — Principal, annual rate (% p.a.) and tenure. Default tenure unit is years; switch to months for short FDs (e.g. 91-day, 180-day).
Pick the compounding frequency — Indian banks compound FDs quarterly — this is the default. NBFC FDs and tax-saver FDs sometimes use monthly. Check your scheme document if unsure.
Read maturity + EAR — Maturity amount, interest earned and the effective annual rate. The period-by-period table shows how each quarter's interest joins the principal.
Common pitfalls
Confirm rates, compounding frequency, tax year, dates, and rounding before acting on the result.
Fees, penalties, inflation, and local rules can make real outcomes differ from simple formulas.
Treat results as guidance, not financial, tax, legal, or investment advice.
Privacy and security
Browser-first by design. The tool page explains any exception before you use it.
Your money amounts, rates, dates, and calculated scenarios stay in the browser. EpitomeTool does not upload finance inputs or generated results to a server.
Frequently asked questions
Is my data uploaded anywhere?
No. Every calculation runs in your browser. Nothing is sent to a server, logged, or stored.
What compounding frequency do Indian banks use for FDs?
Quarterly. Almost every Indian bank (SBI, HDFC, ICICI, Axis, Kotak, IndusInd, RBL, IDFC FIRST, etc.) compounds standard fixed deposits quarterly — interest is credited every quarter and the next quarter's interest is computed on the swollen balance. That's why this tool defaults to 'Quarterly (Indian banks)'. A handful of NBFC FDs and tax-saver FDs use monthly compounding; check your scheme document.
What's the FD formula?
A = P × (1 + r/n)^(n × t). P is principal, r is the annual rate as a decimal (e.g. 0.0725 for 7.25%), n is the compounding periods per year (1, 2, 4, 12), and t is the tenure in years. Interest earned is A − P.
What's the difference between nominal rate and effective annual rate?
Nominal rate is what the bank quotes (e.g. 7.25% p.a. for a 5-year FD). Effective annual rate (EAR) is the actual rate after compounding: EAR = (1 + r/n)^n − 1. At 7.25% quarterly, EAR is 7.45%. EAR is the apples-to-apples number when comparing two FDs with different compounding.
Are FD returns taxable?
Yes. Interest from bank FDs is added to your income and taxed at your slab rate. Banks deduct TDS at 10% if interest in a year exceeds ₹40,000 (₹50,000 for senior citizens), as per Sections 194A and 194P of the Income Tax Act — submit Form 15G/15H to skip TDS if your total income is below the basic exemption. This calculator shows pre-tax maturity; subtract your applicable tax to get the take-home.
Do senior citizens get a higher rate?
Yes. Most banks offer senior citizens (60+) an additional 0.25%–0.50% over the published card rate. SBI Wecare and HDFC Senior Citizen Care give a 0.50% premium on top of the base senior-citizen rate for tenures ≥ 5 years. Just add the premium to the 'Annual rate' input to see your maturity.
What happens if I break the FD before maturity?
Banks charge a penalty (typically 0.50%–1%) and pay interest at the rate applicable to the tenure actually completed, not the booked rate. Example: book a 5-year FD at 7.25%, break at 18 months → bank pays the 18-month-tenure card rate minus the penalty. This tool assumes the FD runs to full maturity; for premature-withdrawal math, ask your bank for the current penalty rules.
What about FDs in foreign currency (NRE / NRO / FCNR)?
The math is identical — only the currency and rate differ. Switch the currency picker and enter the bank's quoted FCNR rate. NRE FD interest is tax-free in India; NRO FD interest is taxable; FCNR interest is tax-free in India but may be taxable in your country of residence. Educational only — consult your CA.
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