Real Rate of Return Calculator
Enter your nominal return and inflation rate to instantly find your real rate of return using the exact Fisher equation. Toggle the tax mode to see your after-tax real return, choose a solve mode to work backwards from a known real rate, and view a chart showing how purchasing power and portfolio value evolve over your holding period.
What is the real rate of return?
The real rate of return is the annual percentage gain on an investment after stripping out the effect of inflation. When prices rise, each dollar you earn buys less than it used to, so the number on your brokerage statement (the nominal return) overstates how much richer you actually became in terms of purchasing power. The real rate of return corrects for this by measuring how much more you can actually buy at the end of the year than at the start.
The Fisher equation: why simple subtraction falls short
Many textbooks teach that the real rate is simply the nominal rate minus the inflation rate. That approximation works well when both numbers are small (below about 5%), but it introduces meaningful error as they grow. The exact formula, derived by economist Irving Fisher in 1930, is: real rate = (1 + nominal rate) / (1 + inflation rate) - 1. For example, a 10% nominal return with 7% inflation gives a real return of (1.10 / 1.07) - 1 = 2.80%, not the 3.00% the subtraction gives. The gap of 0.20 percentage points might seem trivial for one year but compounds into real money over a long holding period.
How taxes shrink your real return further
Inflation is not the only force eating into your returns: taxes are applied to the nominal gain, not the real one. If your savings account pays 5% interest and you are in a 22% tax bracket, you keep only 5% x (1 - 0.22) = 3.90% after tax. If inflation is 3%, the Fisher equation gives a real after-tax return of only about 0.87%. At higher inflation or higher tax rates, after-tax real returns can easily turn negative. This calculator lets you enter your marginal tax rate to see the full picture.
Interpreting your result and long-run context
Over the very long run, broad equity markets in developed countries have delivered real returns of roughly 5 to 7% per year on average, though with enormous variation from year to year. Investment-grade bonds have historically returned around 2 to 3% in real terms. Cash and money-market instruments have often just barely kept pace with inflation, and sometimes fallen behind. A real return above 2% generally represents genuine wealth building. A real return near zero means your portfolio is treading water in purchasing-power terms. A negative real return means you are losing ground despite the nominal gain.
Historical real rates of return by asset class (long-run averages)
| Asset class | Approx. real return (% p.a.) | Notes |
|---|---|---|
| Global equities | 5 to 7 | Long-run average since 1900; highly variable year to year |
| U.S. equities (S&P 500) | 6 to 7 | Post-1926 data including dividends reinvested |
| Corporate bonds (investment grade) | 2 to 3 | Credit risk premium over government bonds |
| Government bonds (10-year) | 0 to 2 | Lower since the 2008 era; negative in high-inflation years |
| TIPS / inflation-linked bonds | 0 to 1 | Real yield is set at auction; can be negative |
| Cash / money market | -1 to 1 | Often barely keeps pace with inflation after tax |
| Real estate (REITs) | 4 to 5 | Includes rental income; excludes leverage |
| Gold | 0 to 1 | Long-run real return near zero; useful as inflation hedge |
Approximate annualised real returns for major asset classes, based on long-run global data. Actual returns vary by period, country and costs.
Frequently asked questions
What is the difference between nominal and real rate of return?
The nominal rate is the stated annual return before adjusting for inflation, for example the interest rate printed on a bond or the percentage gain shown in your investment account. The real rate strips out inflation to show how much your purchasing power actually grew. If your account gained 8% but inflation was 3%, your real return is about 4.85% using the Fisher equation, not 5%.
What is the Fisher equation?
The Fisher equation, named after economist Irving Fisher, states: real rate = (1 + nominal rate) / (1 + inflation rate) - 1. It is the mathematically exact way to separate the inflation component from a nominal return. The common simplification of nominal minus inflation is an approximation that works well at low rates but diverges at higher ones.
Can the real rate of return be negative?
Yes. When inflation exceeds the nominal return, the real rate is negative, meaning your purchasing power declines even though your account balance grew. This occurred widely in 2022 when inflation spiked above 8% in many countries while many savings accounts paid only 0.5 to 2%. Holding cash during high-inflation periods reliably produces negative real returns.
How do taxes affect the real rate of return?
Taxes are levied on nominal gains, not real ones, so they amplify the cost of inflation. If you earn 6% nominally and pay 25% tax, your after-tax nominal return is 4.5%. If inflation is 4%, your after-tax real return is only about 0.48%. The higher the inflation and tax rate, the worse the effect. This is why tax-advantaged accounts such as Roth IRAs or ISAs make such a large long-run difference to real wealth accumulation.
What is a good real rate of return?
There is no single right answer, but as a rough guide: below 0% means you are losing purchasing power; 0 to 2% means you are barely preserving it; 2 to 5% is a solid result for a diversified portfolio; above 5% is strong and typically requires meaningful equity exposure. Long-run average real returns on global stocks have been roughly 5 to 7% per year, though any individual decade can look very different.
How can I use the solve-for-nominal mode?
If you know the inflation rate you expect and the minimum real return you need, the nominal solve mode tells you the raw return your investment must deliver. For example, if you need a 3% real return and expect 4% inflation, you need a nominal return of (1.03 x 1.04) - 1 = 7.12%. You can then compare that hurdle rate against the expected returns of various assets to decide which to hold.