How this page is reviewed
| Risk tier | YMYL |
|---|---|
| Author | Calculover Editorial Team Finance and legal education |
| Editorial owner | Calculover Investing & Retirement Desk Investment planning methodology owner |
| Reviewer | Calculover Editorial Review Source and limitation review |
| Last reviewed | 2026-05-10 |
| Last verified | 2026-05-10 |
| Data effective date | 2026-05-10 |
Methodology
How Inflation Erodes Your Savings (And What to Do About It) applies the formula shown on the page to user-entered principal, rate, period, cash-flow, and return assumptions; investment results are projections, not predictions.
Assumptions
- How Inflation Erodes Your Savings (And What to Do About It) relies on the values the user enters and does not independently verify income, balances, legal status, policy terms, or market quotes.
- Rates of return, reinvestment, compounding frequency, fees, taxes, and cash-flow timing are simplified to the selected inputs.
- Actual market returns are volatile and can differ materially from the constant-rate or scenario assumptions.
Limitations
- How Inflation Erodes Your Savings (And What to Do About It) does not recommend securities, predict returns, include every fee or tax consequence, or assess whether an investment is suitable for the user.
- Actual results depend on market performance, timing, taxes, fees, liquidity, reinvestment, and risk tolerance.
Sources
- Compound Interest Calculator, Investor.gov
- Introduction to Investing, Investor.gov
Professional guidance: How Inflation Erodes Your Savings (And What to Do About It) is for investment math education only and is not investment, tax, legal, or financial advice. Consider risk, fees, taxes, and suitability before acting.
Inflation is the silent tax on savings. While your bank balance stays the same, the purchasing power of every dollar decreases over time. At the historical average of 3% inflation, $100,000 in cash loses half its purchasing power in roughly 24 years. Understanding this erosion is critical for making smart long-term financial decisions.
The Rule of 72 for Inflation
Years to Halve = 72 / Inflation Rate At 3% inflation, purchasing power halves in 24 years. At 5%, it halves in just 14.4 years. At 7%, only 10.3 years.
Real-World Impact
| Year | $100,000 at 2% Inflation | $100,000 at 3% | $100,000 at 5% |
|---|---|---|---|
| Today | $100,000 | $100,000 | $100,000 |
| 10 years | $82,035 | $74,409 | $61,391 |
| 20 years | $67,297 | $55,368 | $37,689 |
| 30 years | $55,207 | $41,199 | $23,138 |
Model your own scenario with the Inflation Calculator.
Where to Put Money to Beat Inflation
- High-yield savings accounts (4–5% APY) — Currently beating inflation, but rates fluctuate with the Fed.
- I Bonds — Government bonds that adjust for inflation. Limited to $10,000/year per person.
- TIPS — Treasury Inflation-Protected Securities whose principal adjusts with CPI.
- Stock index funds — Historically return 7% after inflation over long periods. The best long-term hedge.
- Real estate — Rents and property values generally rise with inflation.
Compare investment growth against inflation with the Compound Interest Calculator.
Key Takeaways
- Cash loses purchasing power every year — at 3% inflation, it halves in 24 years.
- Your investments must earn more than inflation to actually grow your wealth.
- Stock index funds have historically returned ~7% after inflation.
- I Bonds and TIPS provide inflation-protected guaranteed returns.
- Keeping too much in cash is one of the most expensive mistakes in long-term finance.
Frequently Asked Questions
Is keeping money in a savings account losing money?
If your savings account interest rate is below the inflation rate, yes, you are losing purchasing power. A savings account paying 0.5% while inflation is 3% means you lose about 2.5% of real value per year. High-yield savings at 4-5% currently beats inflation.
What is the best hedge against inflation?
Historically, a diversified stock index fund is the best long-term inflation hedge, returning about 7% above inflation annually. For shorter time horizons, I Bonds, TIPS, and real estate provide more direct inflation protection.
How much inflation should I assume for retirement planning?
Most financial planners use 2.5-3% for long-term projections, which is close to the historical average. For healthcare costs, assume 5-6% as medical inflation consistently outpaces general CPI.
Looking for more? Browse all free resources including guides, comparisons, and glossary terms.