How can I protect my savings from inflation decay?

Protect savings by investing in assets that historically outpace inflation, such as broad-market index stock funds, Treasury Inflation-Protected Securities (TIPS), Series I Bonds, and real estate.

Updated: August 2026 • Verified v1.2

Inflation Purchasing Power & Cash Decay Calculator

Finance & MathPopular

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Purchasing Power: Real_Value = Cash / (1 + Inflation_Rate)^Years

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Understanding Your Results

Calculates future real purchasing power ($), percentage of wealth lost to inflation (%), future price of today's basket of goods, and 5-year decay milestones.

Practical Guidance & Next Steps

At a standard 3.5% inflation rate, cash loses approximately 50% of its real purchasing power every 20 years.

What is this?

A macroeconomic finance utility that quantifies the real purchasing power loss of uninvested cash due to compound inflation.

How does it work?

1. Enter current cash sum and expected annual inflation rate. 2. Set time horizon in years (1 to 50 years). 3. View future real purchasing power, future basket costs, and 5-year milestone decay schedules.

Why use it?

Reveals the hidden cost of holding excessive cash and emphasizes the necessity of inflation-beating investments.

Technical Scope & Calculation Limitations

Calculates compound annualized inflation without local CPI commodity weighting.

Frequently Asked Questions

At a 3.5% annual inflation rate, $100,000 in cash loses approximately 50% of its purchasing power, dropping to an equivalent real value of about $50,250 after 20 years.

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