Calculate the compounded future value of a ₹10,00,00,000 lump sum over 50 years, fully adjusted for inflation.
Starting from ₹10,00,00,000 and compounding at India's long-horizon equity return assumption of 12%, your investment reaches a nominal value of ₹2,890.02 Cr after 50 years. After deflating that by 5.5% annual inflation, its real purchasing power in today's money is ₹198.74 Cr — a 93.1% erosion driven entirely by the gap between nominal returns and price increases.
At a 12% return rate, your money doubles roughly every 6 years (Rule of 72). At 5.5% inflation, prices double every 13 years. Your real return — the only return that matters for purchasing power — is 6.5% per year.
| Year | Nominal value | Real value (today's purchasing power) | Purchasing power lost |
|---|---|---|---|
| 5 | ₹17.62 Cr | ₹13.48 Cr | 23.5% |
| 10 | ₹31.06 Cr | ₹18.18 Cr | 41.5% |
| 15 | ₹54.74 Cr | ₹24.52 Cr | 55.2% |
| 20 | ₹96.46 Cr | ₹33.06 Cr | 65.7% |
| 25 | ₹170 Cr | ₹44.58 Cr | 73.8% |
| 30 | ₹299.6 Cr | ₹60.11 Cr | 79.9% |
| 35 | ₹528 Cr | ₹81.06 Cr | 84.6% |
| 40 | ₹930.51 Cr | ₹109.3 Cr | 88.3% |
| 45 | ₹1,639.88 Cr | ₹147.38 Cr | 91.0% |
| 50 | ₹2,890.02 Cr | ₹198.74 Cr | 93.1% |
The return rate you can actually achieve is the single biggest lever on the final corpus. Three return scenarios:
| Scenario | Return assumption | Nominal in 50 yrs | Real in 50 yrs |
|---|---|---|---|
| Conservative | 9% | ₹743.58 Cr | ₹51.13 Cr |
| Expected | 12% | ₹2,890.02 Cr | ₹198.74 Cr |
| Optimistic | 15% | ₹10,836.57 Cr | ₹745.19 Cr |
The future value is calculated using two primary steps:
Where: PV = Present Value (initial amount), r = annual return rate, i = annual inflation rate, and n = duration in years.
Investing $100,000 at an 8% annual return rate for 30 years yields a nominal corpus of $1,006,265. However, at a standard 2.5% inflation rate, its purchasing power today is only $479,729, representing a 52.3% loss in value.
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