| Instrument | Nominal | After Tax (30%) | Real Return | ₹10L in 10yr (Real) |
|---|
Invest ₹10 lakh for 10 years at 6% inflation. FD 7% (30% tax): nominal ₹16.1L, real value ₹9.0L — you lost 10% purchasing power. PPF 7.1% (tax-free): nominal ₹19.9L, real ₹11.1L — gained 11%. Equity 12%: nominal ₹31.1L, real ₹17.4L — gained 74%. Same starting amount, vastly different real outcomes. Use our Gold vs FD vs Equity guide for the full comparison.
The number on your bank statement is your nominal return — what you see. The real return is what you keep after inflation takes its share. It is the only number that tells you whether your money is actually growing in purchasing power or just creating an illusion of growth. A 7% FD looks profitable until you realize that at 6% inflation and 30% tax, your effective return is just 4.9% after tax and -1.04% after inflation. You are literally losing purchasing power every year while your balance appears to grow. This is why the Fisher equation — the formula behind this calculator — is the most important concept in personal finance.
The approximate version (Nominal - Inflation) works for small numbers but becomes inaccurate at higher rates. At 15% nominal and 6% inflation: approximate gives 9%, but the exact Fisher equation gives 8.49%. On ₹1 crore over 20 years, this 0.51% difference equals ₹12+ lakh. This calculator always uses the exact formula. For the full mathematical explanation, see our Real Rate of Return Formula guide.
| Instrument | Nominal Rate | Tax Treatment | After-Tax (30%) | Real Return (6% CPI) | ₹10L in 10yr (Real) |
|---|---|---|---|---|---|
| Savings Account | 3.5% | Slab rate | 2.4% | -3.40% | ₹7.1L |
| FD 7% | 7.0% | Slab rate | 4.9% | -1.04% | ₹9.0L |
| NSC 7.7% | 7.7% | Taxed at maturity | 5.4% | -0.57% | ₹9.4L |
| PPF 7.1% | 7.1% | Tax-Free (EEE) | 7.1% | +1.04% | ₹11.1L |
| EPF 8.25% | 8.25% | Tax-Free (up to limit) | 8.25% | +2.12% | ₹12.3L |
| Equity 12% | 12% | LTCG 12.5% | 10.5% | +4.25% | ₹15.2L |
| Gold SGB 12.5% | 10%+2.5% | Tax-Free at maturity | 12.5% | +6.13% | ₹18.1L |
The dividing line is ~6.1% after-tax return. Below this, you lose purchasing power — above it, you build real wealth. At the 30% tax bracket, only PPF, EPF, equity, and SGBs clear this bar. FDs and savings accounts are guaranteed wealth destroyers in real terms for high-bracket taxpayers.
Every financial goal — retirement corpus, child education, wedding fund — requires your investments to beat inflation after tax. If you park your ₹10 lakh retirement savings in an FD at -1.04% real return, your corpus shrinks in purchasing power every year. In contrast, an equity SIP at +5.66% real return doubles your purchasing power every 12.7 years. Over a 20-year horizon, the gap between -1% and +5.66% real return on ₹10 lakh is the difference between ₹8.2 lakh and ₹30 lakh in real purchasing power. That is why choosing the right instrument — and verifying its real return — is a ₹20+ lakh decision for every ₹10 lakh you invest.
For detailed instrument comparisons, see: Gold vs FD vs Equity, FD Real Returns After Inflation, Savings Account vs Inflation, NSC vs PPF vs FD, Sovereign Gold Bond Returns, NPS vs PPF vs EPF. For broader planning: 7 Strategies to Beat Inflation, Salary Hike vs Inflation, Cost of Delaying Investment. Calculators: SIP Calculator, PPF Calculator, FD Calculator, Inflation Calculator, Purchasing Power Calculator, EPF Calculator.
Real return is your investment return after adjusting for inflation. It measures actual purchasing power growth. Formula (Fisher equation): Real Return = ((1 + Nominal Return) / (1 + Inflation Rate)) - 1. Example: 12% equity return with 6% inflation gives 5.66% real return. A 7% FD at 30% tax bracket (effective 4.9%) with 6% inflation gives -1.04% real return — your money actually loses purchasing power despite the balance growing.
Tax reduces your nominal return before inflation adjustment, dramatically changing the outcome. At 30% tax bracket: FD 7% becomes 4.9% after tax, then -1.04% after 6% inflation — you lose purchasing power. PPF 7.1% is fully tax-free (EEE), so real return is +1.04%. Equity 12% with 12.5% LTCG tax (above ₹1.25L) effectively gives ~10.5%, yielding +4.25% real return. The tax regime (old vs new) and instrument type dramatically determine whether you build or destroy wealth in real terms.
At 6% inflation, instruments with positive real returns: Equity mutual funds (12% nominal) give +5.66% real. Sovereign Gold Bonds (10% + 2.5% interest, tax-free at maturity) give +6.13% real. EPF (8.25%, tax-free up to ₹2.5L contribution) gives +2.12% real. PPF (7.1%, fully tax-free) gives +1.04% real. Instruments with negative real returns at 30% bracket: FD 7% gives -1.04% real, Savings account 3.5% gives -2.36% real, NSC 7.7% after tax gives approximately -0.57% real. You need at least 6.1% after-tax return just to maintain purchasing power.
The Fisher equation (named after economist Irving Fisher) precisely calculates real returns: Real Rate = ((1 + Nominal Rate) / (1 + Inflation Rate)) - 1. The approximate version (Nominal - Inflation) works for small numbers but becomes inaccurate at higher rates. Example: Nominal 15%, Inflation 6%. Approximate: 15% - 6% = 9%. Exact Fisher: ((1.15)/(1.06)) - 1 = 8.49%. The 0.51% difference matters enormously over long periods — on ₹1 crore over 20 years, it equals ₹12+ lakh difference. This calculator uses the exact Fisher formula, not the approximation.
₹10 lakh invested for 10 years at 6% inflation: Savings account 3.5% — nominal ₹14.1 lakh, real ₹7.9 lakh (lost 21% purchasing power). FD 7% post-tax 30% bracket — nominal ₹16.1 lakh, real ₹9.0 lakh (lost 10%). PPF 7.1% tax-free — nominal ₹19.9 lakh, real ₹11.1 lakh (gained 11%). Equity 12% — nominal ₹31.1 lakh, real ₹17.4 lakh (gained 74%). Gold SGB 12.5% tax-free — nominal ₹32.5 lakh, real ₹18.1 lakh (gained 81%). The gap between savings (₹7.9L real) and equity (₹17.4L real) is ₹9.5 lakh from the same starting point.
FD interest is taxed at your income tax slab rate every year. At 30% bracket plus 4% cess, a 7% FD yields only 4.9% after tax. With CPI inflation at 6%, the Fisher equation gives: ((1.049)/(1.06)) - 1 = -1.04% real return. Your FD balance grows from ₹10 lakh to ₹16.1 lakh over 10 years, but this ₹16.1 lakh can only buy what ₹9.0 lakh could when you started. You waited 10 years and lost 10% of your real wealth. Even at 20% tax bracket, FD gives -0.38% real return. Only at the 5% bracket (effective 6.65%) does FD barely beat inflation at +0.61% real.
This calculator works for both — it computes the real return rate which applies equally to lumpsum and SIP investments. The real return percentage tells you how much purchasing power each rupee gains or loses per year, regardless of investment mode. For SIP-specific calculations with projected corpus, use our SIP Calculator. For lumpsum growth projections, use our Lumpsum Calculator. This Real Returns Calculator answers the more fundamental question: is this instrument actually building or destroying my wealth after inflation and tax?
Recalculate whenever any input changes: when RBI changes repo rate (affects FD and savings rates), when government revises PPF or EPF rates (quarterly for PPF, annually for EPF), when CPI inflation changes significantly (check monthly MOSPI releases on the 12th), when your tax bracket changes (promotion, regime switch), or during annual financial review (March-April). Inflation is the most volatile input — it ranged from 3.5% to 7.4% in the past 5 years alone. A 1% change in inflation can flip an instrument from positive to negative real return. Use our Inflation Calculator to track current CPI and adjust your planning accordingly.
Disclaimer: This calculator provides estimates based on the Fisher equation. Actual returns vary by instrument, market conditions, and individual tax situation. Equity and gold returns are not guaranteed and subject to market risk. Tax rates are as per FY 2025-26 Income Tax Act. PPF rate is 7.1%, EPF rate is 8.25% — both subject to government review. Consult a SEBI-registered financial advisor for personalized investment advice.