How Inflation Affects Your Savings

The real return concept

Real return = nominal return − inflation. A 4% savings account during 3% inflation gives you a real return of 1%. A 7% stock return during 3% inflation gives a real return of 4%.

Always think in real terms when planning long-term goals. Without inflation adjustment, the projected balance looks bigger than it really is.

What inflation does to common balances

Purchasing power loss at 3% annual inflation:

• $10,000 in 5 years → worth ~$8,626 in today's dollars
• $10,000 in 10 years → worth ~$7,440
• $10,000 in 20 years → worth ~$5,537
• $10,000 in 30 years → worth ~$4,120

Cash that just sits loses real value every single year. Even high-yield savings barely keeps up; checking accounts guarantee a slow loss.

How to beat inflation

• High-yield savings: matches or slightly beats inflation in normal times — perfect for emergency funds and short-term cash.
• I Bonds (US): explicitly indexed to inflation, capped at $10K/person/year.
• Index funds (S&P 500, total market): historically beat inflation by 6–7% annually over long horizons.
• Real estate: home equity and rental income often track or exceed inflation.
• TIPS (Treasury Inflation-Protected Securities): low-risk, inflation-adjusted bonds for conservative investors.

Calculating in 'real' dollars

When projecting retirement, use a real return assumption (e.g. 5% rather than 8%) so the result is in today's purchasing power. This avoids the trap of seeing 'I'll have $2M' and not realizing that $2M in 30 years buys what $830K does today (at 3% inflation).

Use the calculator

Frequently Asked Questions