This real rate of return calculator strips inflation out of your investment return — via the exact Fisher equation, not the subtraction shortcut — so you see what your money actually gained in purchasing power.

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Real = (1 + Nominal) ÷ (1 + Inflation) − 1

The Fisher equation compares growth factors, not percentages: your money multiplied by (1 + nominal) while prices multiplied by (1 + inflation) — the ratio is what you can actually buy. Historic price levels themselves live on our Inflation Calculator. Part of our Finance Calculators collection.

Worked Examples (Verified)

  • 8% return, 3% inflation (defaults): real = 1.08/1.03 − 1 = 4.85% — the shortcut’s 5.00% flatters by 0.15 points; $10,000 becomes $10,800 nominally, $10,485 in today’s purchasing power
  • The savings-account trap: 1% interest at 4% inflation → real −2.88% — the balance “grew” while purchasing power shrank; mattresses would have scored −3.85%
  • 1970s replay: 12% nominal at 10% inflation → real just 1.82% — high-rate eras feel lucrative and deliver modestly after prices take their share
  • Long-horizon stakes: 30 years at 4.85% real quadruples purchasing power (×4.15); at the shortcut’s implied 5% you’d project ×4.32 — small rate lies compound into big plan errors

Using Real Returns in Planning

  • Long-run US equity planning figures (≈ 6.5–7% real historically) already have inflation removed — never subtract inflation twice by pairing them with this page’s logic again.
  • Your personal inflation differs from CPI: renters, homeowners, and healthcare-heavy retirees live different baskets; use your own number for decisions that hinge on it.
  • Bonds quote it for you when inflation-linked (TIPS real yields) — the market’s own Fisher reading.
  • After-tax real = after-tax nominal run through the same formula: at a 20% tax on 8% nominal (= 6.4% kept) and 3% inflation, real-after-tax is 3.30% — the honest planning number.

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Frequently Asked Questions

How do you calculate the real rate of return?

Fisher’s equation: real = (1 + nominal) ÷ (1 + inflation) − 1. For 8% nominal and 3% inflation: 1.08/1.03 − 1 = 4.85%. Simply subtracting (8 − 3 = 5%) is an approximation that overstates, increasingly so at high inflation.

Why isn’t real return just nominal minus inflation?

Because returns and inflation compound on different bases: your return applies to your money, inflation to prices. The ratio of the two growth factors is the true purchasing-power gain. At low rates the error is small (0.15 points in the defaults) — at 1980s-style inflation it’s enormous.

What is a good real rate of return?

Context-dependent: long-run US stocks have delivered ~6.5–7% real, bonds ~2–3% real, cash ~0–1% real across history (with brutal decades for each). “Good” means beating the inflation your household actually experiences with risk you can hold through drawdowns.

Can the real return be negative while my balance grows?

Yes — whenever nominal return < inflation (1% interest in 4% inflation = −2.88% real). Statements show the balance; purchasing power keeps the true score. This is the default condition of cash under mattresses (0% nominal) in any inflationary year.

How do taxes affect real returns?

Taxes are levied on nominal gains — you pay tax on the inflation component too. So compute after-tax nominal first (e.g. 8% taxed at 20% → 6.4%), then apply Fisher: real-after-tax at 3% inflation = 3.30%, versus 4.85% pre-tax. Inflation plus taxation is the saver-pensioner’s combined headwind.

Is this real rate of return calculator free?

Yes — free, instant, no sign-up.