The short answer
Inflation means the same money buys less over time. If prices rise 3% a year, $10,000 kept as cash buys only what about $7,440 buys today after 10 years. Your savings only grow in real terms if the interest rate you earn — after tax — is higher than inflation.
A savings balance that never goes down feels safe, and in one sense it is: the number on the screen doesn't drop. What drops is what that number can buy. Inflation is a slow, quiet cost, and because it never shows up on a statement it's easy to ignore for years.
On this page
The number that matters: your real return
Your real return is roughly the interest rate minus inflation. Earn 4% while prices rise 3% and your money is only really growing by about 1% a year. Earn 1% while prices rise 3% and you're losing about 2% a year in buying power.
| Where it's kept | Interest | Balance after 10 years | Worth in today's money |
|---|---|---|---|
| Cash at home | 0% | $10,000 | $7,441 |
| Ordinary savings account | 1% | $11,046 | $8,219 |
| Rate that matches inflation | 3% | $13,439 | $10,000 |
Tax makes it a little worse: if interest is taxable where you live, compare inflation with the rate you keep after tax.
The rule of 70
A quick way to feel the effect: divide 70 by the inflation rate to get roughly how many years it takes prices to double. At 2%, about 35 years. At 3%, about 23. At 7%, just 10. Over a long retirement, even “normal” inflation cuts the value of a fixed income roughly in half.
What's a normal inflation rate?
Central banks in the US, UK, Canada and Australia all aim for low, steady inflation — around 2%, or 2–3% in Australia. Actual inflation moves around that target and occasionally far above it, as in 2021–2023. For long-term planning many people assume 2.5–3%.
Protecting your savings from inflation
- Short-term money (emergency fund, a deposit you'll use in a year or two) belongs in the best easy-access savings rate you can find. You accept a little inflation loss in exchange for safety.
- Long-term money (retirement, goals more than five years away) has historically beaten inflation more reliably when invested in a diversified mix of shares and bonds — with ups and downs along the way.
- Inflation-linked bonds (TIPS in the US, index-linked gilts in the UK) are designed to keep pace with official inflation.
- Plan in today's money. When you set a goal 20 years out, inflate it first — $100 of today's spending is about $185 in 25 years at 2.5%.
The retirement calculator shows results in today's money for exactly this reason, and the emergency fund guide covers where short-term cash should sit.
Frequently asked questions
How does inflation affect savings?
It reduces what your savings can buy. If inflation is higher than the interest you earn, your savings lose real value each year even though the balance grows.
Is it bad to keep money in a savings account during inflation?
Not for money you need soon — safety matters more there. For long-term goals, cash usually falls behind inflation over many years.
What is a real interest rate?
The interest rate minus inflation. 4% interest with 3% inflation is about a 1% real return.
How long does it take for prices to double?
Divide 70 by the inflation rate. At 3% a year, about 23 years.
OnlineToolPro Editorial Team
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The team behind OnlineToolPro. We write guides from building and testing these tools, and check platform rules against official documentation such as YouTube Help. When something changes, we update the article and its date.