How FD maturity actually works
You park a lump sum for a fixed tenure at a fixed rate. The bank compounds interest (quarterly by default in India) and pays out at maturity — or, if you chose the payout option, sends interest to your account every quarter and returns the principal at the end.
The FD Compound Interest Formula
- A — Maturity amount
- P — Principal (deposit amount)
- r — Annual interest rate (in decimal)
- n — Compounding frequency per year (4 for quarterly, the Indian default)
- t — Tenure in years
A Worked Example
For a ₹1 Lakh FD at 7% interest with quarterly compounding for 5 years, the maturity works out to approximately ₹1,41,478 — interest earned ₹41,478. With simple interest (no compounding), the same FD would mature at ₹1,35,000 — quarterly compounding adds ~₹6,500.
What Affects Your FD Maturity?
- Deposit amount — Direct proportion. A ₹10 Lakh FD earns 10× the interest of a ₹1 Lakh FD at the same rate.
- Interest rate — Rates vary by bank, tenure, and customer category. Small finance banks pay 1–1.5% more than scheduled commercial banks.
- Tenure — Longer tenure usually fetches higher rates. The sweet spot for most banks is 2–5 year FDs.
- Compounding frequency — Quarterly is the Indian default. Some banks offer monthly compounding for slightly higher returns.
- Senior citizen status — Borrowers aged 60+ get an additional 0.25–0.75% (typically 0.5%).
Tax on FD Interest
- FD interest is fully taxable at your income tax slab rate. There is no LTCG benefit (unlike mutual funds).
- TDS — Banks deduct 10% TDS if annual interest exceeds ₹40,000 (₹50,000 for senior citizens) per bank. PAN must be linked.
- Form 15G / 15H — If your total income is below the basic exemption limit, submit these forms to your bank annually to avoid TDS.
- Tax-saver FD — A special 5-year lock-in FD qualifies for Section 80C deduction up to ₹1.5 Lakh (Old Regime only). Interest is still taxable.
FD vs Other Investments
- FD vs Debt Mutual Fund — FDs are simpler and DICGC-insured up to ₹5 Lakh per bank. Debt funds may give slightly higher returns but lack the insurance and have exit loads.
- FD vs PPF — PPF gives ~7.1% tax-free, FD gives 6–8% taxable. After tax (30% slab), FD effective rate drops to ~5%. PPF wins for tax efficiency over long horizons.
- FD vs Liquid Fund — Liquid funds for very short term (1–6 months) often give better post-tax returns than FDs of the same period.
Practical tips before you book
- Compare 4–5 banks. Small finance banks (AU, Equitas, Ujjivan) routinely beat HDFC/SBI by 1%+ — and the first ₹5L is still DICGC-insured.
- Ladder FDs across tenures (1y / 2y / 3y) so something matures every year. Saves you from breaking the long one.
- Senior bonus isn't retroactive — register the age-60 KYC before booking.
- If your taxable income is below the exemption limit, file Form 15G (15H if senior) at the start of the FY to stop TDS.
- Above ₹5L per bank: split across banks for full DICGC insurance.
Frequently Asked Questions
Is FD interest taxable?
Yes — fully, at your slab rate. There's no LTCG benefit, no indexation, no Section 80TTA cover (that's only for savings interest). It's added to your income each year and taxed at whatever bracket you land in.
TDS — when does it kick in?
₹40,000 of interest per bank per financial year for under-60s; ₹50,000 for senior citizens. Cross that and the bank deducts 10% TDS (20% if PAN is missing). TDS is adjusted against your final tax in the ITR — it's not extra. If your total income is below the exemption limit, file Form 15G (15H for seniors) at the start of the year to stop TDS at source.
What's the premature withdrawal penalty?
Two hits. First, the bank applies a 0.5–1% penalty on the rate. Second — and bigger — they pay you the rate that applied for the actual period held, not the rate you booked. Break a 5-year FD after 18 months and you'll get the 18-month rate minus the penalty, not your booked 5-year rate.
FD vs debt mutual fund — which is better?
Both are taxed at slab (post Apr 2023 for debt funds). FD has DICGC ₹5L insurance; debt funds don't. But debt funds are taxed only on redemption, not annually — that deferral compounds. Debt funds can also be more liquid (no premature penalty, just exit load if any). FD wins on simplicity and insurance; debt funds win on tax deferral and liquidity.
Is splitting FDs across banks actually a strategy?
Yes, for one specific reason: DICGC insurance covers ₹5 Lakh per depositor per bank. ₹15L in one bank = only ₹5L insured. ₹5L each in three banks = fully insured. Banks failing is rare but not zero (Yes Bank moratorium, PMC). For large deposits this is the cheapest insurance you'll buy.
Quarterly vs annual compounding — does it matter?
Marginally. A 5-year ₹1L FD at 7%: quarterly gives ₹1,41,478, annual gives ₹1,40,255. About ₹1,200 over 5 years. Most banks default to quarterly anyway.
Does this calculator store my inputs?
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