How Inflation Affects Your 401k Real Return

2025 nominal and real returns by asset class in 401k context

Asset ClassNominal Return (2025 est.)Inflation (est. 2.5%)Real Return
S&P 500 (long-term avg.)10%2.5%7.5% real
Small-cap equities11%2.5%8.5% real
Int’l developed equities8%2.5%5.5% real
Bond index (10-yr Treasury)4.5%2.5%2.0% real
TIPS2.0% real yieldInflation-adjusted2.0% guaranteed real
Stable value/Money market3–4%2.5%0.5–1.5% real
ℹ️Why Equities Are the Best Inflation Hedge

Companies can raise prices to match inflation, maintaining real earnings. This is why equity returns have historically exceeded inflation by 7%+ over long periods. For 401k investors with 10+ years to retirement, staying equity-heavy is the strongest inflation defense available in a standard 401k menu.

2025 Asset Allocation Adjustments for Inflation

  • Add TIPS if your plan offers them: Treasury Inflation-Protected Securities adjust principal with CPI. Real yield of 2%+ is meaningful protection
  • Consider international equities: Currency diversification provides some inflation hedge if U.S. dollar weakens
  • Avoid long-duration bond funds in high inflation: Rising rates hurt long-duration bonds disproportionately
  • Keep equity allocation high: Historical data shows equities outperform inflation by 7%+ over 20-year periods
  • Short-term bonds over long-term: If holding bonds, short-duration reduces rate-change sensitivity

Inflation-Adjusted Retirement Projections

How inflation erodes the real value of 401k growth — $500,000 starting balance, 20 years

Nominal ReturnInflationReal Return$500K After 20yr (Real)$500K After 20yr (Nominal)
7%2%5%$1,327,000$1,931,000
7%3%4%$1,096,000$1,931,000
7%5%2%$745,000$1,931,000
3%3%0%$500,000$906,000

Model Your Inflation-Adjusted Retirement

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