Nominal Return, Real Return and What Your Money Buys
Every return figure you are shown is in money. Money is not what you spend it on. The conversion between the two is a single subtraction most people can do in their head, and doing it changes which investments look adequate — including some that look perfectly safe.
Updated 10 September 2026
Lakshmi's deposit is doing worse than it says
Lakshmi has money in a deposit and knows exactly what rate it pays. The figure is certain, it arrives, and nothing about it is in doubt.
What is in doubt is what it will buy. If prices rise over the same year, the money she has at the end purchases less than the amount suggests. Whether she is better off depends on two numbers, and she has only ever been quoted one of them.
Nominal return is the figure in rupees: what the statement says. Real return is what is left after prices have risen: the change in what the money can actually buy.
The conversion
Subtract the inflation rate from the nominal rate. That is close enough for almost every purpose, and the small correction for compounding matters only at high rates.
The consequences are immediate. A return that is positive in money can be negative in what it buys, and this is not an exotic case — it is the ordinary condition of cash whenever inflation runs above deposit rates. Lakshmi's money grows every year and is worth less every year, and both statements are true at once.
The second consequence is the one that reorders a portfolio. An investment that cannot lose money in nominal terms can lose purchasing power reliably, while one that moves about a great deal in money terms may hold its purchasing power better over long periods. "Safe" describes the first and "adequate" describes the second, and confusing the two is how people arrive at retirement with an amount that is intact and insufficient.
What the record looks like both ways
| If you held for | Periods tested | On paper | In what it buys |
|---|---|---|---|
| 1 year | 3,095 | +12.41% | +7.71% |
| 3 years | 2,597 | +13.40% | +8.38% |
| 5 years | 2,101 | +13.60% | +8.50% |
| 7 years | 1,606 | +13.71% | +8.18% |
| 10 years | 863 | +13.87% | +8.14% |
The two columns are the same investment measured against two different yardsticks. The gap between them is inflation, and over long periods it is a large fraction of the headline number.
Notice what happens to a plan built on the left-hand column. A goal thirty years away, projected at a nominal rate, will appear to be met — and then the thing being bought will also have risen in price, and the projection will have said nothing about whether it was affordable. That is why the goal-planning pages on this site work in real terms wherever they can, and why choosing an inflation assumption is a decision the reader has to make consciously rather than have made for them.
Keep both rates in the same units
The single most common error is mixing them: a return in nominal terms against a cost in today's prices, or the reverse.
If you project an investment at a nominal rate, you must also inflate the thing you are saving for. If you project in real terms, you use a lower return and leave the target at today's price. Either is correct. Doing one on each side produces an answer that is wrong by the whole of inflation compounded over the period, which over decades is not a small error — it is often larger than the entire projected gain.
The test is quick: if your target amount is today's price of something, your return must be real. If your target has been grown for inflation, your return must be nominal.
What real returns do not fix
They use somebody else's basket. A published inflation index measures a representative household's spending. It is not yours, and if your goal is concentrated in one category the national figure may not describe it at all — which is the subject of published inflation against your own.
They do not include tax. Tax is charged on nominal gains, not real ones, which means you can be taxed on a gain that did not exist in purchasing power. That is not a quirk of the calculation; it is how the arithmetic works, and it makes the after-tax real return lower than either figure suggests.
They are still one number. A real return has the same problem every single figure has: it describes a period that ended, and the range around it is wide. The range is set out in why long-term equity returns remain uncertain.
What to take away
Ask of every return figure: is this in money, or in what the money buys? Almost always it is the first, and almost always the second is the one that decides anything.
For Lakshmi the practical consequence is not that deposits are bad — she needs money that will certainly be there. It is that the part of her savings meant to last decades cannot be judged by a rate that looks reassuring in rupees, because the thing it has to keep pace with is not measured in rupees either.
Educational content only. This is not personalised financial, investment or tax advice. Figures quoted are historical or illustrative and are not forecasts. Consult a qualified professional before acting on anything you read here.