What Is Inflation? How It Erodes Your Money (With Examples)

By Jorge Sanchez · April 20, 2026 · 6 min read

Inflation is the rate at which the general price level of goods and services rises — which means the purchasing power of your money falls over time. It's one of the most important forces in personal finance, yet most people don't think about it until prices visibly rise.

How Inflation Is Measured

The U.S. government measures inflation using the Consumer Price Index (CPI) — a basket of ~80,000 goods and services tracked monthly by the Bureau of Labor Statistics. The basket includes:

• Housing (largest component at ~33%)
• Food and beverages (~15%)
• Transportation (~16%)
• Medical care (~9%)
• Education, clothing, recreation, and more

The Fed's target inflation rate is 2% per year. Above that, they typically raise interest rates to slow the economy.

What Inflation Actually Does to Your Money

This is why keeping large amounts in low-yield savings is a wealth-erosion strategy long term.

The Inflation Formula

That $10,000 needs to grow to $15,580 just to keep the same purchasing power — before you count taxes on gains.

How to Protect Your Wealth from Inflation

• Index funds / equities: Stocks have historically returned 7–10%/year on average, well above inflation
• I Bonds: U.S. Treasury bonds that adjust with CPI — currently strong inflation protection
• TIPS: Treasury Inflation-Protected Securities — principal adjusts with inflation
• Real estate: Property values and rents tend to rise with inflation
• HYSA / money market: Currently paying 4–5% — better than 0%, but just keeping pace
• Commodities: Gold, oil, agricultural goods tend to rise with inflation

Historical U.S. Inflation Rates

Notable periods for context:

• 1970s: Peaked at 14.8% in 1980 — wage-price spiral, oil shocks
• 1980s–2019: Averaged ~2.5%/year — stable and manageable
• 2021–2022: Spiked to 8–9% — supply chain disruption + pandemic stimulus
• 2023–2025: Cooled to 2.5–3.5% — Fed rate hikes worked