Is a 4% Return Good or Bad? It Depends on the Regime
A 4% nominal return is strong when inflation is 1% (3% real) but poor when inflation is 5% (–1% real). The same number means different things in different regimes. Evaluating returns without adjusting for inflation is one of the most common — and costly — investor mistakes.
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In this article
The short answer
“Is 4% a good return?” is a question without context — and without context, it’s unanswerable. The same 4% can represent excellent wealth building or guaranteed purchasing power destruction, depending on one variable: inflation.
A savings account yielding 4% in 2006 (inflation ~2.5%) was delivering approximately 1.5% real return — modest but positive. A savings account yielding 4% in 2022 (inflation ~8%) was delivering –4% real — a rapid erosion of wealth despite the nominally attractive rate.
This is why economists insist on thinking in real terms. Nominal returns are what you see. Real returns are what you get. The gap between them — inflation — is the invisible variable that determines whether your money is actually growing or quietly shrinking.
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What the data shows
Using FRED data (DGS10, FEDFUNDS, CPIAUCSL, 1960–2024), the real return on “safe” assets has varied enormously across regimes.
1980–2000: 10-year Treasury yields averaged approximately 8%. Inflation averaged approximately 4%. Real return: ~4% — genuinely attractive, allowing savers to grow wealth in safe instruments.
2010–2021: 10-year yields averaged approximately 2%. Inflation averaged approximately 1.8%. Real return: ~0.2% — essentially zero in real terms. A decade of “safe” investing that produced no real wealth growth.
2022: 10-year yield rose to approximately 4%. But inflation hit 9.1%. Real return: approximately –5%. The highest nominal yields in a decade still represented massive real losses.
2024–2026: With yields around 4–4.5% and inflation moderating to 2.5–3.5%, real returns on safe assets have turned modestly positive — approximately 1–2%. The first genuinely positive real returns in over a decade.
The S&P 500’s long-term nominal return of ~10% translates to approximately 6.5–7% real. During the 1970s, nominal equity returns were approximately 6% — but inflation of 8% meant real returns were deeply negative. The same nominal performance meant wealth creation in one era and wealth destruction in another.
→ Datasets: Real Interest Rates · S&P 500 Returns
Why it happens — the macro mechanism
The confusion between nominal and real returns persists because of deep-seated psychological biases.
Money illusion — the tendency to think in nominal terms — is hardwired. Our brains process “4% return” as positive because 4 is greater than zero. The subtraction of inflation requires a conscious calculation that most people don’t perform routinely. Financial products are marketed in nominal terms precisely because the numbers look better.
Regime dependence makes the problem worse. Investors who built their mental models during low-inflation periods (2010–2020) calibrated their expectations to a world where 4% was genuinely attractive. When inflation surged, they continued applying the same mental framework — treating 4% as “good” even when the real return had turned negative.
The comparison framework also matters. A 4% return looks good compared to the 0.1% savings rates of 2015. It looks poor compared to the 15% equity returns of 2021. It looks catastrophic compared to the 9% inflation of 2022. The same number evaluated against different benchmarks produces entirely different conclusions.
The correct benchmark is always inflation. A return is “good” if it exceeds inflation by enough to compensate for the risk taken. For risk-free assets, any positive real return is acceptable. For equities, a real return above 4–5% is historically normal. Below that, you’re being insufficiently compensated for the volatility you’re bearing.
Returns don’t exist in isolation. They exist relative to inflation — and inflation changes the meaning of every number in your portfolio.
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What it means for different economic actors
Savers should always calculate real returns. If your deposit yields 4.5% and inflation is 3%, your real return is 1.5% — acceptable but modest. If inflation rises to 5%, the same deposit is losing purchasing power. Use the breakeven inflation rate as a quick benchmark: if your return is below the 5-year breakeven, you’re expected to lose purchasing power.
Equity investors should evaluate portfolio returns net of inflation over rolling 5–10 year periods. The S&P 500 nominal return of 15% in 2023 was accompanied by approximately 3.5% inflation — a real return of approximately 11.5%, which is genuinely excellent. The same 15% during 8% inflation would deliver only 7% real — still positive but far less impressive.
Retirement planners must build plans in real terms. A “4% withdrawal rule” assumes real returns of approximately 4–5%. If real returns fall to 2% (due to high inflation or low nominal returns), the safe withdrawal rate drops proportionally — potentially to 2.5–3%. Ignoring inflation in retirement planning is the single most dangerous financial modeling error.
The essential habit: every time you see a return number, mentally subtract the current inflation rate. If the result is negative, you’re losing money — no matter what the nominal figure says.
Go deeper
📊 Study: Real Rates vs CAPE Ratio
📁 Datasets: Real Interest Rates · Real Fed Funds
📖 Related: What are real interest rates?
Related questions
Frequently asked questions
What real return should I target?
For risk-free savings: any positive real return (above 0%) is acceptable. For a diversified equity portfolio: 4–6% real is the historical norm. For a balanced 60/40 portfolio: 3–4% real is a reasonable long-term expectation. If your actual real returns fall consistently below these benchmarks, your portfolio may be underperforming on a risk-adjusted basis.
Is 4% on a CD better than 10% in stocks?
It depends on the risk-adjusted comparison and the time horizon. The CD’s 4% is guaranteed; the stocks’ 10% is an average that includes years of –20% and +30%. For short-term savings (under 3 years), the guaranteed 4% is often preferable. For long-term investing (10+ years), the expected 10% from equities — even with interim volatility — has historically dominated. The real question is your time horizon and your ability to tolerate drawdowns.
Why don’t banks advertise real returns?
Because real returns are often unattractive — and sometimes negative. Marketing a “4.5% savings rate” is far more compelling than marketing “approximately 1% after inflation.” The nominal framing is a deliberate marketing choice that exploits money illusion. Financial literacy requires the habit of performing the subtraction yourself.
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Last updated — 13 April 2026