Real Return Calculator
About Real Return Calculator
What Is Real Return?
The real return is your investment gain after subtracting the effects of inflation. If your portfolio earned 10% last year but inflation was 3%, your real return was closer to 6.8%. The distinction matters because nominal returns can be misleading – earning 12% sounds great until you realize inflation was 9%, leaving you with barely any real growth. The Fisher equation provides the precise calculation rather than a simple subtraction.
The Real Return Formula
The Fisher equation is Real Return = ((1 + Nominal Return) / (1 + Inflation Rate)) - 1. This is more accurate than simply subtracting inflation from the nominal return. The difference is small at low rates but becomes significant when rates are high.
How to Use This Calculator
Enter your nominal (stated) return and the inflation rate for the same period. Click Calculate to see your real return. The tool also shows the purchasing power of $10,000 invested at both the nominal and real rates over various time horizons, making the impact of inflation visually clear.
Frequently Asked Questions
Why not just subtract inflation from the nominal return?
Simple subtraction is an approximation. The Fisher equation accounts for the compounding effect between returns and inflation. At low rates the difference is minor, but at higher rates it becomes meaningful.
Can real return be negative?
Yes. When inflation exceeds your nominal return, the real return is negative, meaning your money lost purchasing power despite showing a positive nominal gain.
What inflation rate should I use?
Use the CPI (Consumer Price Index) inflation rate for the same time period as your investment return. For forward-looking projections, the long-term US average of about 3% is a reasonable estimate.
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