Inflation-Adjusted Returns

Inflation is the silent tax on savings. An FD earning 7% nominal returns when CPI inflation is 6% delivers a real return of approximately 1% — barely preserving purchasing power. Understanding real returns across asset classes is essential for long-term financial planning in India, where inflation has historically been structurally higher than in developed markets.

Using approximate historical data: Bank FDs in India have typically offered nominal pre-tax returns of 6–8%. Post-tax at the 30% slab, effective returns drop to 4.2–5.6%. Adjusted for inflation of 5–6%, real post-tax FD returns have often been negative to marginally positive over multi-decade periods. This explains why FDs, despite being the most popular savings instrument in India, are poor wealth-building tools for the long term.

PPF (Public Provident Fund) has typically offered nominal returns of 7–8%, currently tax-free at the EEE (Exempt-Exempt-Exempt) status. With inflation at 5–6%, real PPF returns have been approximately 1.5–3%, better than FD on an after-tax basis. However, the 15-year lock-in limits liquidity.

Equity, measured by the Sensex CAGR since inception (1979–2024), has delivered approximately 15–16% nominal CAGR. Adjusting for 6% CPI inflation, the real return is approximately 9–10%. This is broadly consistent with the equity risk premium theory: equities must compensate investors for volatility and uncertainty with a meaningful real return premium over risk-free rates. This long-run real return advantage of equity over debt instruments is the mathematical foundation of the advice to invest in equity for long-term goals.

Gold has delivered approximately 10–12% nominal CAGR in rupee terms over the last 20 years, partly driven by the rupee's depreciation against gold's USD price. Real returns are approximately 4–6%, making gold a reasonable inflation hedge over long periods.

Real returns should be the benchmark for evaluating any investment proposal, not nominal yields.