Inflation vs investment — real return calculator
See whether your investment actually grew in real terms after inflation ate into your returns
Investment returns are nominal (before tax). Inflation data: IMF WEO & World Bank WDI. Real return = nominal return minus inflation rate (Fisher approximation).
Averages 2000–2026. Real return = nominal return minus average US inflation (~2.4%). Past performance does not guarantee future results.
How to use this tool
Nominal vs real returns — what's the difference?
A nominal return is the raw percentage your investment grew — say 10% per year. But if inflation was 4%, your real return is only about 6% — that's the actual increase in purchasing power. The formula is roughly: Real Return ≈ Nominal Return − Inflation Rate.
This matters enormously over time. A savings account earning 2%/year while inflation runs at 3% is actually losing you money in real terms — your cash buys less every year even as the number in your account grows. The S&P 500's historical ~10% nominal return has delivered ~7–8% real after US inflation, making equities one of the few asset classes that reliably beats inflation long-term.
Methodology
This tool compares a nominal investment return against the country's inflation rate for the same period, to reveal the real (inflation-adjusted) return — the genuine change in purchasing power your investment produced.
$10,000 at 10% nominal for 5 years, in a country averaging 4% inflation:
Nominal value: $10,000 × 1.10⁵ = $16,105. Real (inflation-adjusted) value: $16,105 ÷ 1.04⁵ = $13,230 — a real annual return of roughly 6%.
Benchmark returns are long-run historical averages for illustration; inflation series come from IMF/World Bank/BLS. See Data Sources for the full list, and our Disclaimer — this is not investment advice.