Your account statement shows a number: up 6% this year. It feels like progress. But that figure only tells you how many more dollars you have, not how much more those dollars can buy. If prices rose while your money grew, part of your gain was quietly eaten by inflation. The number that actually answers “did I get richer?” is your real return.
Nominal return is the raw percentage your investment grew. Real return is that growth after subtracting inflation — the change in your purchasing power. One flatters you; the other tells the truth.
The quick way and the exact way
The rule of thumb most people use is simple subtraction:
Real return ≈ Nominal return − Inflation rate
By that shortcut, a 6% nominal return with 3% inflation leaves you about 3% richer in real terms. That approximation is close enough for a back-of-the-napkin check. The precise formula, which matters more as rates get larger, divides instead of subtracts:
Real return = (1 + Nominal) ÷ (1 + Inflation) − 1
With 6% and 3%, the exact figure is (1.06 ÷ 1.03) − 1 ≈ 2.91% — a hair below the 3% shortcut. At double-digit rates the gap between the two methods grows, so use the division formula when precision counts. (All figures here are hypothetical illustrations, not forecasts.)
Why the gap matters
A few percentage points of inflation sound trivial until you compound them across a working life. Consider three scenarios on a $10,000 investment held one year:
- Nominal 6%, inflation 2%: about 3.9% real — solid progress.
- Nominal 6%, inflation 6%:roughly 0% real — you stood still despite the “gain.”
- Nominal 2%, inflation 4%: about −1.9% real — you lost purchasing power even though the balance went up.
A savings account paying less than inflation is a slow, guaranteed way to grow poorer while your balance grows larger.
Thinking in today’s dollars
The mental trick is to translate future money back into what it buys now. If you expect $100,000 in 20 years and inflation averages 3%, that sum will purchase what roughly $55,000 buys today. The nominal figure is not wrong — it is just wearing a costume. Real return strips the costume off so you can compare a 1985 dollar, a 2026 dollar, and a projected 2046 dollar on equal footing.
This reframing changes decisions:
- It sets an honest bar for any investment: beating inflation is the minimum to preserve wealth, not a bonus.
- It makes cash look riskier than it feels, because idle money loses real value every year prices rise.
- It keeps retirement targets grounded, since a number that ignores inflation will badly understate what you need.
Putting it to work
When you review a return, do it in two steps. First note the nominal figure. Then subtract the inflation rate over the same period — or divide for precision — to see the real result. A portfolio that returned 8% in a year of 7% inflation did far less for you than one that returned 5% when inflation was 1%. The headline is the smaller story; purchasing power is the real one.