Your Bank Shows 7%. You Keep 4.82%. At 6% Inflation, You Lose Money. Here Is the Exact Post-Tax FD Yield at Every Tax Bracket — With the Cumulative FD Trap, TDS Math, and the One Number That Tells You Whether Your FD Is Actually Growing Your Wealth.
SBI: 6.45%. HDFC: 6.50%. Unity SFB: 9.00%.
Every bank prominently displays the pre-tax rate. No bank shows you the number that matters — what you actually keep after the government takes its share.
A 7% FD at the 30% bracket yields 4.82%. At India’s historical average inflation of 5.5%, your real return is negative 0.64%. You are paying the bank to hold your money.
This guide does the math nobody else does: post-tax yields at every slab including surcharge and cess, the cumulative FD cash flow trap where you pay tax on money you have not received, how compounding frequency silently changes your TDS bill, and why PPF at 7.10% beats every FD in existence for taxpayers above the 10% bracket.
The Post-Tax FD Yield Table: What Every Bracket Actually Keeps
Every number below includes 4% health and education cess. This is what most online calculators miss — they apply the raw slab rate and overstate your yield by 0.2–0.5%.
New Tax Regime (FY 2026-27)
| Pre-Tax FD Rate | 0% (≤Rs 12L) | 5.20% eff | 10.40% eff | 15.60% eff | 20.80% eff | 31.20% eff |
|---|---|---|---|---|---|---|
| SBI 6.45% | 6.45% | 6.11% | 5.78% | 5.44% | 5.11% | 4.44% |
| HDFC/ICICI 6.50% | 6.50% | 6.16% | 5.82% | 5.49% | 5.15% | 4.47% |
| Yes Bank 7.00% | 7.00% | 6.64% | 6.27% | 5.91% | 5.54% | 4.82% |
| Post Office 5yr 7.50% | 7.50% | 7.11% | 6.72% | 6.33% | 5.94% | 5.16% |
| Unity SFB 8.15% | 8.15% | 7.73% | 7.30% | 6.88% | 6.45% | 5.61% |
| Unity SFB 9.00% | 9.00% | 8.53% | 8.06% | 7.60% | 7.13% | 6.19% |
| PPF 7.10% | 7.10% | 7.10% | 7.10% | 7.10% | 7.10% | 7.10% |
PPF’s row does not change. That is the entire point.
To match PPF’s 7.10% post-tax at the 30% bracket, you need a pre-tax FD rate of 10.32%. No bank in India offers this. Not even close.
With Surcharge (High Income)
| Pre-Tax Rate | 31.20% (no surcharge) | 35.88% (Rs 50L–1Cr) | 38.22% (Rs 1–2Cr) | 42.74% (>Rs 5Cr, old regime) |
|---|---|---|---|---|
| 7.00% | 4.82% | 4.49% | 4.32% | 4.01% |
| 8.00% | 5.50% | 5.13% | 4.94% | 4.58% |
| 9.00% | 6.19% | 5.77% | 5.56% | 5.15% |
At the highest bracket, nearly 43 paise of every rupee of FD interest goes to the government. A 9% FD — the best bank rate in India — yields just 5.15%.
The Real Return: After Tax AND Inflation
Post-tax yield is only half the picture. Your wealth grows only if the post-tax yield exceeds inflation.
Current CPI inflation: 3.40% (March 2026) India’s 10-year average CPI: ~5.5%
Real Returns at 30% + Cess (31.20% Effective Tax)
| Instrument | Pre-Tax | Post-Tax | Real Return @ 3.4% | Real Return @ 5.5% |
|---|---|---|---|---|
| SBI FD 6.45% | 6.45% | 4.44% | +1.01% | -1.00% |
| HDFC FD 6.50% | 6.50% | 4.47% | +1.04% | -0.98% |
| Yes Bank 7.00% | 7.00% | 4.82% | +1.37% | -0.64% |
| Unity SFB 9.00% | 9.00% | 6.19% | +2.70% | +0.65% |
| PPF 7.10% | 7.10% | 7.10% | +3.58% | +1.52% |
| SCSS 8.20% | 8.20% | 5.64% | +2.17% | +0.13% |
| RBI FRB 8.05% | 8.05% | 5.54% | +2.07% | +0.04% |
At current low inflation (3.4%), most FDs deliver modest positive real returns. This is unusually good. Do not assume it lasts.
At India’s historical average inflation (5.5%), every major bank FD at the 30% bracket delivers negative real returns. Only Unity SFB at 9% barely stays positive. PPF is the only instrument that comfortably beats inflation at every bracket.
The Decade-Long Damage
A Rs 10 lakh FD at 6.5% for 10 years at the 30% bracket with 5.5% average inflation:
- Nominal maturity value (quarterly compounding): Rs 19,09,944
- Tax paid over 10 years (31.20% on accrued interest): Rs 2,84,062
- Post-tax corpus: Rs 16,25,882
- Purchasing power of Rs 16,25,882 in today’s rupees (at 5.5% inflation): Rs 9,52,308
You started with Rs 10 lakh. After a decade, your money buys what Rs 9.52 lakh buys today. The FD destroyed Rs 47,692 in purchasing power while appearing to “grow” your money.
The Cumulative FD Tax Trap: Paying Tax on Money You Have Not Received
This is the most common FD tax mistake. Banks rarely explain it. Most investors discover it through a tax notice.
Cumulative FDs are taxed on accrual basis — not when you receive the money at maturity.
Year-by-Year Cash Flow: Rs 10 Lakh Cumulative FD at 7.5%, 5 Years (30% + Cess)
| Year | Interest Accrued | You Receive | Tax Due (31.20%) | Cash You Must Arrange |
|---|---|---|---|---|
| Year 1 | Rs 73,570 | Rs 0 | Rs 22,954 | -Rs 22,954 |
| Year 2 | Rs 79,087 | Rs 0 | Rs 24,675 | -Rs 24,675 |
| Year 3 | Rs 85,019 | Rs 0 | Rs 26,526 | -Rs 26,526 |
| Year 4 | Rs 91,395 | Rs 0 | Rs 28,515 | -Rs 28,515 |
| Year 5 | Rs 98,250 | Rs 14,27,321 | Rs 30,654 | +Rs 13,96,667 |
| Total | Rs 4,27,321 | Rs 14,27,321 | Rs 1,33,324 | — |
You pay Rs 1,02,670 in tax over the first 4 years on interest you have not received. This is money you must arrange from salary, savings, or other investments.
For retirees living on pension with no salary income, this is particularly painful — you are dipping into other savings to pay tax on phantom income locked inside a cumulative FD.
How to Avoid This Trap
- Choose non-cumulative FDs (monthly or quarterly interest payout) — you receive the interest and can pay tax from it
- Match FD tenure to your tax planning — shorter tenures mean less phantom income buildup
- Track accrued interest across all FDs — check Form 26AS quarterly to see TDS deducted versus actual tax owed
- Pay advance tax if total tax liability exceeds Rs 10,000 — otherwise you face interest under Sections 234B and 234C
TDS on FDs: The Rules Most People Get Wrong
The Threshold Cliff
TDS triggers when interest at a single bank crosses Rs 50,000 (Rs 1,00,000 for senior citizens) in a financial year.
Critical detail: TDS applies to the entire interest amount once you cross the threshold — not just the excess.
- Rs 49,999 interest → zero TDS
- Rs 50,001 interest → TDS on the full Rs 50,001 (= Rs 5,000 at 10%)
This cliff creates a sharp incentive to keep each bank’s interest just below the threshold.
TDS ≠ Total Tax
| Your Slab | TDS Deducted | Actual Tax (with cess) | Additional Tax You Owe |
|---|---|---|---|
| 5% | 10% (Rs 5,000) | 5.20% (Rs 2,600) | Refund of Rs 2,400 |
| 10% | 10% (Rs 5,000) | 10.40% (Rs 5,200) | Rs 200 |
| 20% | 10% (Rs 5,000) | 20.80% (Rs 10,400) | Rs 5,400 |
| 30% | 10% (Rs 5,000) | 31.20% (Rs 15,600) | Rs 10,600 |
Example: Rs 50,000 FD interest
At the 30% bracket, TDS covers less than one-third of your actual liability. The remaining Rs 10,600 per Rs 50,000 of interest is due at ITR filing — or via advance tax if your total liability exceeds Rs 10,000.
Form 121 (Replaces 15G/15H from April 2026)
From April 1, 2026, the old Forms 15G and 15H are replaced by a unified Form 121.
Who can file Form 121: Anyone whose estimated total tax liability for the year is nil.
What changes:
- Single form for all age groups (previously separate forms for under-60 and over-60)
- Must include estimated interest from all FDs across all banks — not just the bank you are submitting to
- Must be filed at the start of each financial year
- Must be filed separately at each bank
What does not change: Eligibility criteria remain the same — only for nil tax liability.
Warning: Many bank websites still reference Form 15G/15H. If you submit the old form after April 2026, banks may reject it and deduct TDS. Check with your bank.
Multi-Bank FD Strategy: Legal TDS Avoidance + Full DICGC Coverage
The smartest FD strategy addresses two problems simultaneously: TDS cash flow hit and deposit insurance limits.
The Math
At 7% interest, Rs 7,14,285 generates exactly Rs 50,000 in annual interest — the TDS threshold.
Keep FDs at or below Rs 7 lakh per bank.
| Total Corpus | Banks Needed | Interest Per Bank | TDS | DICGC Coverage |
|---|---|---|---|---|
| Rs 7 lakh | 1 | Rs 49,000 | Zero | Rs 5 lakh insured |
| Rs 14 lakh | 2 | Rs 49,000 each | Zero | Rs 10 lakh insured |
| Rs 21 lakh | 3 | Rs 49,000 each | Zero | Rs 15 lakh insured |
| Rs 35 lakh | 5 | Rs 49,000 each | Zero | Rs 25 lakh insured |
For senior citizens with the Rs 1,00,000 threshold, the limit is approximately Rs 14.28 lakh per bank at 7%.
This does not reduce your tax liability — you still report total interest in your ITR. But it eliminates the upfront cash flow hit of TDS and maximizes deposit insurance coverage.
Recommended Bank Split (April 2026 Rates)
| Allocation | Bank | Rate | Interest on Rs 7L | DICGC |
|---|---|---|---|---|
| Rs 5 lakh | Unity SFB | 9.00% (1001 days) | Rs 45,000 | Fully covered |
| Rs 5 lakh | Suryoday SFB | 7.90% | Rs 39,500 | Fully covered |
| Rs 5 lakh | Jana SFB | 7.77% | Rs 38,850 | Fully covered |
| Rs 7 lakh | Yes Bank | 7.00% | Rs 49,000 | Rs 5L covered |
| Rs 7 lakh | RBL Bank | 7.20% | Rs 50,400 | Rs 5L covered |
At Rs 5 lakh per SFB, every rupee is DICGC-insured. At Rs 7 lakh in larger banks, Rs 5 lakh is insured and the bank’s systemic importance provides additional comfort.
FD vs Every Alternative: Post-Tax Showdown
At the 30% + Cess Bracket (31.20% Effective)
| Instrument | Rate | Tax Treatment | Post-Tax Yield | Lock-in | Insurance/Guarantee |
|---|---|---|---|---|---|
| SBI FD | 6.45% | Slab rate, accrual | 4.44% | Flexible | DICGC Rs 5L |
| Yes Bank FD | 7.00% | Slab rate, accrual | 4.82% | Flexible | DICGC Rs 5L |
| Unity SFB FD | 9.00% | Slab rate, accrual | 6.19% | 1001 days | DICGC Rs 5L |
| PPF | 7.10% | Tax-free (EEE) | 7.10% | 15 years | Sovereign |
| SCSS | 8.20% | Slab rate | 5.64% | 5 years | Sovereign |
| RBI FRB | 8.05% | Slab rate | 5.54% | 7 years | Sovereign |
| NSC | 7.70% | Slab rate (deferred) | 5.30% | 5 years | Sovereign |
| Post Office TD 5yr | 7.50% | Slab rate + 80C | 5.16% | 5 years | Sovereign |
| Debt MF (post-2023) | ~7–8% | Slab rate on redemption | 4.82–5.50% | None | None |
| Invoice Discounting | 10–12% | Slab rate | 6.88–8.26% | 30–90 days | None |
Why Debt Mutual Funds Still Have One Edge Over FDs
Since April 2023, debt mutual funds lost indexation benefit — both are taxed at slab rate. But one difference remains:
FDs: tax on accrual (every year). Debt MFs: tax on redemption (when you sell).
This deferral means your money compounds pre-tax inside a debt MF. Over 5 years, this adds approximately 0.3–0.5% in effective post-tax yield.
| Instrument | Pre-Tax | Tax Timing | 5-Year Post-Tax Value (Rs 10L, 31.20% tax) |
|---|---|---|---|
| FD at 7.5% | 7.5% | Annual accrual | Rs 12,80,085 |
| Debt MF at 7.5% | 7.5% | At redemption | Rs 12,96,339 |
The Rs 16,254 difference comes entirely from tax deferral — your money compounds at 7.5% for 5 years, then you pay tax once. In the FD, the government takes its share every year, reducing the base that compounds.
NRI FD Taxation: The 30% TDS Surprise
NRO FDs
NRO (Non-Resident Ordinary) FD interest attracts flat 30% TDS + surcharge + 4% cess — regardless of your actual income or tax bracket in India.
| Income Level | Effective TDS Rate | Post-Tax on 7% FD |
|---|---|---|
| Below Rs 50 lakh | 31.20% | 4.82% |
| Rs 50L–1 Cr | 35.88% | 4.49% |
| Rs 1–2 Cr | 38.22% | 4.32% |
| Above Rs 2 Cr | 42.74% | 4.01% |
DTAA Relief
Double Taxation Avoidance Agreements can reduce Indian withholding:
| Country | DTAA Rate | Post-Tax on 7% NRO FD | Documents Needed |
|---|---|---|---|
| No DTAA | 31.20% | 4.82% | — |
| USA | 15% | 5.95% | TRC + Form 10F |
| UK | 15% | 5.95% | TRC + Form 10F |
| UAE | 12.50% | 6.13% | TRC + Form 10F |
| Canada | 15% | 5.95% | TRC + Form 10F |
| Singapore | 15% | 5.95% | TRC + Form 10F |
NRE FDs are fully tax-exempt in India. If you are an NRI with FCNR or NRE deposits, there is zero Indian tax. The 30% problem only applies to NRO accounts.
To claim DTAA benefit, submit a Tax Residency Certificate (TRC) from your country of residence plus Form 10F to your bank before TDS is deducted. After-the-fact claims require filing an Indian ITR and waiting months for a refund.
Senior Citizen FD Tax: The 80TTB Advantage (Old Regime Only)
Section 80TTB
Senior citizens (60+) get a deduction of up to Rs 1,00,000 on interest from deposits — including FDs, savings accounts, and post office deposits. Budget 2026 raised this from Rs 50,000.
This is available only under the old tax regime.
The Rs 12.2 Lakh Sweet Spot
At SCSS rate of 8.20%, exactly Rs 12,19,512 generates Rs 1,00,000 in annual interest — fully covered by 80TTB.
For FDs at 7%: Rs 14,28,571 generates Rs 1,00,000 — also fully covered.
Senior Citizen Post-Tax Yields (Old Regime with 80TTB)
| Scenario | Gross Rate | Interest on Rs 12L | 80TTB Deduction | Taxable Interest | Post-Tax Yield |
|---|---|---|---|---|---|
| SCSS | 8.20% | Rs 98,400 | Rs 98,400 | Rs 0 | 8.20% |
| SBI Senior FD | 7.05% | Rs 84,600 | Rs 84,600 | Rs 0 | 7.05% |
| Unity SFB Senior | 9.50% | Rs 1,14,000 | Rs 1,00,000 | Rs 14,000 | ~8.86% |
For amounts within the 80TTB shelter, FDs and SCSS are effectively tax-free under the old regime. This changes the entire calculus for retirees — the optimal strategy is to shelter Rs 12–14 lakh in SCSS or FD under 80TTB, then put excess in PPF extension for tax-free compounding.
How Compounding Frequency Changes Your Tax Bill
Most Indian banks compound FD interest quarterly. You might assume this only affects your total return. It also affects your tax.
Accrued Interest Comparison: Rs 10 Lakh FD at 7.5%
| Compounding | Year 1 Accrued Interest | Year 5 Accrued Interest | Total Interest (5 Years) |
|---|---|---|---|
| Quarterly | Rs 77,136 | Rs 1,05,015 | Rs 4,43,181 |
| Half-yearly | Rs 76,406 | Rs 1,04,165 | Rs 4,38,935 |
| Annual | Rs 75,000 | Rs 1,02,475 | Rs 4,32,194 |
Quarterly compounding generates Rs 10,987 more total interest over 5 years than annual compounding. This extra interest is taxable.
The real issue: Higher accrued interest in Year 1 pushes you closer to — or over — the Rs 50,000 TDS threshold sooner. With quarterly compounding on Rs 7 lakh at 7.5%, Year 1 accrued interest is Rs 54,000 — above threshold. With annual compounding, it would be Rs 52,500. Both cross the threshold, but the quarterly version triggers higher TDS.
For non-cumulative FDs (monthly/quarterly payout), you receive interest regularly and can use it to pay tax. The total return is lower because withdrawn interest does not compound — but your cash flow matches your tax liability.
The Income Bracket Trap: When FD Interest Costs More Than It Earns
Under the new tax regime, the slab structure creates sharp jumps at specific income thresholds. FD interest can push you across these thresholds.
Example: Salary of Rs 11.5 Lakh
| FD Interest | Total Income | Marginal Rate on FD Interest | Tax on FD Interest |
|---|---|---|---|
| Rs 0 | Rs 11.5L | — | Rs 0 |
| Rs 50,000 | Rs 12.0L | 10.40% | Rs 5,200 |
| Rs 1,00,000 | Rs 12.5L | Rs 50K @ 10.40% + Rs 50K @ 15.60% | Rs 12,800 |
| Rs 2,00,000 | Rs 13.5L | Rs 50K @ 10.40% + Rs 1.5L @ 15.60% | Rs 28,600 |
The first Rs 50,000 of FD interest is taxed at 10.40%. The next Rs 50,000 jumps to 15.60%. The marginal tax on the second Rs 50,000 is 50% higher than on the first.
If your salary puts you near a slab boundary (Rs 8L, Rs 12L, Rs 16L, Rs 20L, Rs 24L in new regime), calculate the marginal tax rate on additional FD interest before choosing your FD amount.
Section 87A Rebate Cliff
Under the new regime, Section 87A provides Rs 60,000 rebate for income up to Rs 12 lakh — making it effectively tax-free.
At Rs 12,00,001, the rebate vanishes entirely. Your tax bill jumps from Rs 0 to approximately Rs 61,500 (on Rs 12,00,001).
If your salary is Rs 11 lakh and you have Rs 1,00,001 of FD interest, you lose the entire rebate. That one extra rupee costs you Rs 61,500.
Keep total income (salary + FD interest + all other income) at or below Rs 12 lakh if you are anywhere near this range.
What Every Existing FD Calculator Gets Wrong
We reviewed FD calculators on ClearTax, Groww, HDFC Bank, ThriftRupee, Moneycontain, and inflationcalculator.in. Here is what they miss:
| Feature | Most Calculators | What You Actually Need |
|---|---|---|
| Tax rate | Raw slab rate | Slab + surcharge + 4% cess |
| Tax timing | Lump-sum at maturity | Year-by-year accrual basis |
| TDS impact | Ignore | TDS deducted upfront reduces compounding base |
| Inflation | Not shown | Real return after tax AND inflation |
| Comparison | FD only | FD vs PPF vs SCSS vs debt MF on same basis |
| Regime | Single regime | Old vs new regime side-by-side |
| Compounding | Single option | Impact of quarterly vs annual on tax |
| Senior benefits | Basic | 80TTB shelter amount, Form 121 eligibility |
The opportunity cost of TDS alone is material. When a bank deducts Rs 5,000 as TDS on Rs 50,000 interest, that Rs 5,000 is no longer compounding in your FD. Over 5 years at 7%, this TDS leakage costs you approximately Rs 1,503 in lost compounding — money no calculator accounts for.
The Decision Framework: When FDs Make Sense and When They Do Not
FDs make sense when:
- Your total income is below Rs 12 lakh (new regime) — 0% effective tax, FD yield equals pre-tax rate
- You are a senior citizen with deposits under Rs 12–14 lakh sheltered by 80TTB (old regime)
- You need liquidity within 1–3 years and cannot lock money in PPF or SCSS
- You are laddering across banks for both TDS avoidance and DICGC coverage
- You are using SFB FDs (8–9%) with amounts within Rs 5 lakh DICGC limit
FDs do not make sense when:
- You are in the 20%+ bracket AND can lock money for 5+ years — PPF at 7.10% tax-free is strictly better
- Your FD interest is pushing you across a slab boundary — restructure amounts
- You are holding cumulative FDs without planning for annual tax outflows
- You are an NRI on NRO deposits paying 31.20% TDS — consider NRE FDs or equity
- Your income exceeds Rs 50 lakh (surcharge applies) — FDs become the most tax-inefficient fixed-income instrument
The One Number That Matters
Post-tax real return = FD rate × (1 - effective tax rate) - inflation
If this number is negative, your FD is destroying wealth while appearing to grow it. Calculate this before every FD renewal.
At SBI’s 6.45%, 30% bracket, 5.5% inflation: 6.45% × 0.688 - 5.5% = -1.06%
You lose 1.06% of your purchasing power every year. Over a decade, that is a 10.1% erosion — Rs 1,01,000 lost on every Rs 10 lakh.
What to Do Next
-
Calculate your effective tax rate — not just the slab, but slab + surcharge (if applicable) + 4% cess. Use this for all FD math.
-
Check if your FD interest crosses the Rs 50,000 TDS threshold at any bank — if yes, either spread across banks or file Form 121 (if eligible).
-
If you hold cumulative FDs, verify that accrued interest is reported in your ITR each year. Check Form 26AS on the income tax portal.
-
Compare your post-tax FD yield against PPF (7.10%) and SCSS (8.20%) — for amounts you can lock in, these are almost always better above the 10% bracket.
-
For seniors on old regime, calculate whether your total deposit interest is within the Rs 1,00,000 80TTB shelter. If so, your FDs are effectively tax-free — do not switch to the new regime without doing this math.
-
If your total income is near Rs 12 lakh, check whether FD interest will push you above the Section 87A rebate cliff. Losing the rebate on Rs 1 of extra income costs Rs 61,500.
All rates as of April 2026. Tax calculations use FY 2026-27 slabs. FD rates change frequently — verify with your bank before investing. This is educational content, not financial advice. Consult a qualified tax professional for your specific situation.