What is Real return?

A real return is the gain on an investment after accounting for inflation, the general rise in prices over time. The headline figure a fund or bank reports is the nominal return, which tells you how many more dollars you have. The real return answers a more useful question: how much more you can actually buy with those dollars, known as your purchasing power. If savings grow by 5% while prices in the shops also rise by 5%, there is more money but no extra purchasing power, so the real return is zero.

Say you invest $10,000 and it earns 7% in a year, leaving $10,700. Over the same hypothetical year, inflation is 3%, so a basket of goods that cost $10,000 at the start now costs $10,300. To find the real return, divide one plus the nominal return by one plus inflation, then subtract one: 1.07 ÷ 1.03 = 1.0388, a real return of about 3.9%. Put another way, the $10,700 buys what $10,388 bought a year earlier. The shortcut of subtracting inflation from the nominal return (7% minus 3% equals 4%) is close when both numbers are small, but the gap widens when inflation is high.

Real returns depend on the inflation measure used, usually a consumer price index, which tracks the cost of a typical basket of everyday goods and services. A household's own inflation can differ, for example if rent or healthcare make up a large share of its spending. Real return figures also usually ignore taxes and fees unless stated. A common mistake is comparing a nominal figure from one period with a real figure from another, which can make results look better or worse than they were.

The difference matters most when prices move sharply. In 2022, US inflation reached about 9% and long-term Treasuries lost about 30%, so the loss of purchasing power was larger than the nominal loss alone suggests. Falling prices change the picture too: in the 1929 crash, US stocks fell 82% with dividends and 77% after inflation (September 1929 to June 1932, Shiller data). Getting back to the peak took 15 years with dividends, but 7 years with dividends and inflation.

For a private investor building a long-term portfolio, the real return is the figure that links investing to actual goals, such as a retirement income that still pays for the same lifestyle decades later. Inflation compounds quietly: at a hypothetical 3% a year, prices roughly two and a half times over 30 years. This is why retirement planning measures such as safe withdrawal rates are usually expressed in real terms.

By Dr. Harry Hamann

What is the difference between nominal and real return?
The nominal return is the percentage gain in dollars. The real return subtracts the effect of inflation, showing the change in purchasing power. A 7% nominal return with 3% inflation is a real return of about 3.9%.

How do you calculate real return?
Divide one plus the nominal return by one plus the inflation rate, then subtract one. For example, 1.07 ÷ 1.03 − 1 ≈ 3.9%. Subtracting inflation from the nominal return gives a rough approximation.

Can a real return be negative?
Yes. If inflation is higher than the nominal return, purchasing power shrinks even though the dollar balance grows. Cash earning 2% while prices rise 5% has a real return of roughly −2.9%.