Spring 2026 has put inflation back on investors' radar. Euro area annual inflation rose from 1.9% in February to 2.5% in March, and many beginners are once again looking at their portfolios through the wrong lens.
The return shown in an app or brokerage account is almost always a nominal return. It tells you how many euros your investment made. It does not yet tell you how much your purchasing power actually improved. If everyday prices rise at the same time, part of that gain is simply catching up with inflation.
This distinction matters because long-term investing is not about making numbers on a screen grow for their own sake. The goal is to grow future purchasing power. Once you understand the difference between nominal return and real return, you can judge your progress more calmly, make more realistic plans, and avoid the disappointment that comes from overly optimistic assumptions.
Nominal return tells you euros, real return tells you purchasing power
Nominal return is the visible return on an investment before inflation is taken into account. If a €10,000 investment grows to €10,600 in one year, the nominal return is 6%.
Real return asks a different question: what does that growth mean for purchasing power? If prices rise 3% at the same time, a 6% nominal return does not mean your standard of living improved by 6%. The real return is roughly 2.9%, not exactly 3%.
That may sound like a small difference, but over long periods it is not small at all. If you invest €10,000 for ten years and earn a 6% annual nominal return, the investment grows to about €17,908. If inflation is 3% per year throughout that period, the purchasing power of that sum is equivalent to about €13,326 in today's money. The portfolio grew a lot in nominal terms, but much less in real terms than many beginners first assume.
That is why nominal return is useful but incomplete. It tells you what appears in the account. Real return tells you what the money is likely to buy.
Inflation is not the only drag
Beginners often make one mistake at this point: they start thinking real return means nominal return minus inflation, full stop. In practice, the picture is slightly broader.
The first drag is inflation. The second drag is fees. The third drag is taxes. That is exactly why the same nominal return can feel very different from one investor to another.
Take that same 6% nominal return again. If inflation is 3%, real return is about 2.9%. If the investment also carries annual fees of 0.2%, real growth falls to roughly 2.7% before taxes. If the investor then pays taxes on part of the return along the way, the actual increase in purchasing power becomes smaller still.
This does not mean investing is a bad idea. Quite the opposite. It means a good investor uses the right measuring stick. Fees and taxes do not make long-term investing pointless, but they do remind you that a gross number is not the same thing as your personal outcome.
This is also one reason low costs matter so much. When inflation already takes a share of the return, every extra percentage point of fees cuts real return more than many people realize. For the same reason, understanding the basic logic of taxes tells you more about your real net result than looking only at historical market returns.
Investing is also a way to defend yourself against inflation
Inflation does not only reduce the return on investments. It also reduces the value of money that never gets invested in the first place. That is exactly why investing is, for long-term money, a way to defend purchasing power.
Take a simple example. You keep €10,000 in a bank account for ten years and the account pays no interest. In nominal terms, you still have €10,000. But if prices rise by 3% per year over the same period, the purchasing power of that money falls to roughly €7,441 in today's terms. Your statement does not show a loss, but in practice you have lost around €2,559 of purchasing power.
Now compare that with investing the same €10,000 at a 6% annual return. The nominal value grows to about €17,908. After adjusting for the same 3% inflation, the purchasing power is about €13,326 in today's money. The real gap versus the bank account is roughly €5,885. That is why, for money you will not need for years, it is generally better to seek return through investing than to leave it sitting in cash.
There is still an important boundary here. An emergency fund and money you will need soon should not be pushed into market risk just because inflation exists. But money with a long time horizon usually has a much better chance of preserving and growing purchasing power when invested than when left idle in a bank account.
What this changes in practice for an investor
Understanding real return is not just a theory exercise. It changes how you plan in very practical ways.
The first change is about goals. If you estimate your future wealth only in nominal euros, you may overestimate how strong your position will actually be later on. For example, investing €200 per month for 25 years at a 7% nominal return grows to about €162,014. That sounds like a large sum. But if average inflation is 3% per year, the purchasing power of that amount is equivalent to about €77,379 in today's money. That difference does not make investing unattractive. It makes planning more honest.
The second change is about expectations. If the market delivers 6% in a year but daily life still feels noticeably more expensive, the contradiction does not necessarily mean something is wrong with your investments. It may simply mean nominal numbers look better than purchasing power feels.
The third change is about cash. Inflation also eats away at the purchasing power of money sitting in a bank account, even if the nominal balance stays stable. That does not mean all cash is a mistake. An emergency fund and money needed soon still belong in cash or very low-risk solutions. The point of real return is not to push every euro into markets. It is to help you understand what each option does to purchasing power over different time horizons.
The fourth change is about how you judge your own progress. If your goal is a home down payment, extra retirement savings, or another long-term buffer, real return gives a better sense of how close you are to the actual goal. A nominal number on its own can make things look better than they really are, especially if inflation stays elevated for longer.
How to use real return without overthinking it
You do not need to calculate real return every week or for every individual purchase. For most investors, four practical rules are enough.
First: keep two numbers in mind, not one. Nominal return tells you what is happening in the portfolio. Real return tells you what it means for your goals.
Second: when planning, use a cautious assumption rather than the most optimistic possible scenario. If you are building a 15-year or 25-year plan, a slightly conservative real-return assumption is more useful than a beautiful nominal figure that leaves no room for inflation, costs, or taxes.
Third: focus on the things you can influence. You do not control inflation yourself. You can improve costs, diversification, investing habits, and your basic understanding of taxes. A long-term investor cannot control the macroeconomy, but can reduce friction in the personal process.
Fourth: do not let one short-term inflation headline rewrite your whole investing strategy. One hot inflation print does not tell you everything about the next decade. The point of real return is not to scare you. It is to keep the measuring stick honest. Once you evaluate purchasing power rather than just the percentage shown on the screen, market headlines immediately feel a little less dramatic.
Summary
- Nominal return tells you how much an investment grew in euros.
- Real return tells you how much your purchasing power actually improved after inflation.
- In practice, fees and taxes also reduce what the investor ultimately keeps.
- Long-term plans should be judged through real return, not nominal return alone.
- Understanding real return does not make investing gloomier. It makes it clearer.