Real Return Calculator

A return on an investment and the return on your money are not the same thing. The figure on a statement is nominal: it counts the extra dollars. What matters for your life is real return, which is what those dollars buy after prices have risen. If an account earns five per cent while prices rise four, your money grew but your purchasing power grew by barely one per cent. Ignoring that gap is the most common way investors misjudge their progress. The exact bridge between the two is not simple subtraction, though subtraction is close for small numbers. Dividing one plus the nominal rate by one plus the inflation rate, then subtracting one, gives the true real return. At eight per cent nominal and three per cent inflation, the real return is just under five per cent — a small correction that compounds into a large difference over decades. Compounding makes the gap widen with time. Over thirty years, three percentage points of inflation drag can cut the purchasing power of a final balance by more than half. That is why a nominal return of eight per cent can feel like wealth on paper while delivering only five per cent of real progress. Retirement projections that use nominal returns and ignore inflation routinely overstate what a pot will support. This calculator converts a nominal return into a real one, then shows a starting amount in both future money and today's money. It assumes constant rates for the whole period, which real inflation rarely is, and ignores taxes on the return. Use it to sanity-check anyone's projection and to judge whether a return is genuinely beating rising prices.

This calculator returns estimates for general information only. It is not financial, investment, tax or legal advice, and it cannot replace guidance from a qualified professional who knows your circumstances. Figures such as loan payments, investment growth and retirement projections are simplified models based on the inputs and assumptions you provide, not guarantees of future results.