What Is Inflation? (And Why It Matters for Your Savings)

Inflation is the rate at which prices for goods and services rise over time. Each unit of currency buys a little less than it used to.

A simple example

Inflation at 4% in a year turns a $100 purchase into a $104 purchase by year end. Your $100 bill did not shrink. What it buys did.

Why this matters for cash savings

Money sitting in a low-interest account loses value over time if its rate falls below inflation. $10,000 earning 0.5% interest while inflation runs at 4% loses about 3.5% of its purchasing power every year, even as the account balance grows.

Why this matters for investing

This is a core reason long-term money gets invested instead of parked in cash. Stocks have historically outpaced inflation over long periods. Cash has not. That is a historical pattern, not a guarantee. See our investing basics guide for the tradeoffs.

Where to see the effect

Our compound interest calculator shows growth in nominal terms, not adjusted for inflation. A large future dollar amount will still buy less than the same amount buys today.

Inflation rates vary by country and year. Nothing here predicts future inflation or recommends a specific way to protect against it.