FD Interest, Compounding and Tax: What Your Bank Doesn’t Spell Out
Written by lemmatools Editorial Team · Last updated: · 6 min read
Quarterly compounding: the fine print that helps you
Indian banks compound cumulative FDs quarterly: a "7% p.a." deposit actually grows at (1 + 0.07/4)⁴ − 1 = 7.19% a year. On ₹1 lakh over 5 years that is ₹1,41,478 — about ₹1,200 more than annual compounding would give. Payout FDs (monthly/quarterly interest to your account) forgo this compounding, which is the hidden price of taking the income.
Tax is where FDs lose their shine
- FD interest is fully taxable at your slab, accrual-year by accrual-year — not only at maturity.
- TDS at 10% applies once bank interest crosses ₹50,000 in a year (₹1,00,000 for senior citizens); it rises to 20% without a PAN.
- TDS is not the final tax — a 30%-slab saver owes the remaining 20% at filing; a zero-tax saver reclaims it, or avoids it upfront with Form 15G (15H for seniors).
- Post-tax at 30%, a 7% FD yields 4.9–5.0% — often below inflation. FDs preserve money; they do not grow it.
Laddering: liquidity without sacrificing rate
Instead of one ₹5 lakh FD for 5 years, split it into five ₹1 lakh FDs maturing in 1, 2, 3, 4 and 5 years, re-booking each maturity for a fresh 5 years. After the ramp-up, an FD matures every year at the 5-year rate — you get long-tenure yields with annual liquidity, and rate rises get captured at every re-booking. It is the single most useful FD tactic and takes ten minutes of netbanking to set up.
When an FD is (and isn’t) the right tool
- Right: emergency funds, money needed within 1–3 years, a retiree’s income floor alongside SCSS and MIS.
- Wrong: 10-year wealth goals — post-tax FD returns trail inflation; compare the same monthly saving in the SIP calculator.
- Compare alternatives by after-tax yield: PPF’s tax-free 7.1% beats a taxable 7% FD for anyone above the 20% slab (but locks money 15 years).
- Stay within ₹5 lakh per bank (DICGC insurance) for money you cannot afford to risk in a small bank chasing +1%.