inflation: what it is and how it erodes wealth

In short

A friend of mine kept a coffee can of cash in his garage for twenty years, and he was proud of it. If you have ever saved a little and felt safe, you know that feeling. Inflation is the slow rise in prices across the economy, so each dollar buys a bit less than it did before. Your savings can grow in number and still shrink in what they can buy. Check what your savings earn and compare that rate to the inflation rate the government reports. If the first is lower, your buying power is slipping, and that is worth knowing. The Bureau of Labor Statistics publishes the official figures, and they cost you nothing to look up.

The whole of it

What it is

I once watched my grandfather hold up a nickel and say a man could buy a cup of coffee with it when he was young. He was not complaining. He was just noticing, the way a farmer notices the weather. That is inflation in a nutshell. Prices for the things we buy tend to rise over the years, so the same dollar stretches less far.

If you are holding cash, you have probably felt this at the grocery store. The cart costs more than it did a few years back, and your paycheck may not have kept pace. Nobody did anything wrong. It is simply how a money system moves over time.

Economists measure it with a price index. The one most people hear about is the Consumer Price Index, which the Bureau of Labor Statistics publishes. It follows the cost of a basket of everyday goods and services, such as food, rent, gas, and medical care. When the basket costs more than it did a year ago, that change is the inflation rate. The Federal Reserve also watches a related measure from the Bureau of Economic Analysis, called the Personal Consumption Expenditures price index. Each is a useful gauge, though neither will match your own household exactly.

How it works

A friend of mine once said that money is only a promise of what you can trade it for later. I thought about that for a good while. When prices climb, that promise gets thinner.

Here is the part that catches folks off guard. Your money does not need to go anywhere for it to lose ground. A balance of $10,000 in a drawer is still $10,000 next year. But if prices rose 3 percent, the things you wanted to buy now cost $10,300. Your pile stayed put while the world moved up around it. It is a bit like standing still on a moving walkway.

The useful idea is the real return, which is what you earn after you account for rising prices. If your savings account pays 4 percent and inflation runs 3 percent, your real return is about 1 percent. Your buying power grew a little. If the account pays 1 percent and inflation runs 3 percent, your real return is about negative 2 percent. You gained dollars and lost buying power at the same time.

It also works on income and debt, and not always in the same direction. A fixed salary buys less each year if raises do not keep up. A borrower with a fixed rate loan repays with dollars that are worth less than the ones borrowed. That is one reason people feel inflation so differently. Some of it helps and some of it hurts, depending on where you stand.

The numbers, and where to find yours

If you want to know how fast prices are rising, go to the source. The Bureau of Labor Statistics posts the Consumer Price Index on its website, and the latest yearly inflation rate is there, free for anyone to read. The current rate is the current figure, which the official source publishes each year. Use the official page for the exact month and the date it was published.

Your savings rate is the second number. Look at the annual percentage yield on your statement or on your bank's website. That figure already counts compounding, so it is the fair one to compare. The Federal Reserve also publishes interest rate data if you want a wider view of what banks and bonds are paying.

Your own cost of living is the third number, and it is the one nobody can hand you. Think about what you really spend on. A family that rents and drives a lot feels gas and rent most. A retiree may feel medical costs most. The published index averages everyone together, so your own experience can run higher or lower. Write down three or four of your biggest bills a year ago and today. That small habit tells you more than any chart.

A worked example

I want to tell you about a woman I will call Marlene. She is a schoolteacher, careful and proud of her saving. She put $20,000 into a savings account that paid 1 percent a year, and she left it alone for ten years because it felt safe.

At 1 percent, her balance grows by $20,000 times 1.01 for each year. After ten years that is $20,000 times about 1.1046, which comes to about $22,092. She earned roughly $2,092 in interest. She was pleased to see the number go up.

Now suppose prices rose 3 percent each year over the same stretch. Something that cost $20,000 at the start would cost $20,000 times about 1.3439 after ten years, which is about $26,878. So Marlene needed about $26,878 to buy what $20,000 bought before. She had $22,092.

The gap is $26,878 minus $22,092, which is $4,786. Her statement showed a gain. Her buying power showed a loss. She could afford about 82 cents of what she used to buy for every dollar, since $22,092 divided by $26,878 is about 0.82. Marlene did nothing foolish. She just never held her savings up against the price of things.

None of this says what Marlene should have done. It only shows what the numbers did. A saver who earned 3 percent in that same stretch would have kept even. A saver who earned 5 percent would have pulled ahead.

Where it goes wrong

I have made this mistake myself, so I say it kindly. The first trap is trusting the balance and ignoring the buying power. A number that goes up feels like progress, even when it is not. Cash is useful and safe in one sense, yet it has a quiet cost over many years.

The second trap is relying on one average for a personal question. The official index is a fair gauge, but it is a blend. If your costs lean toward rent, tuition, or health care, your own rate may differ from the headline. Check your own bills, not just the news.

The third trap is the opposite panic. Some folks read about inflation and rush to do something drastic. That can cost real money in fees, taxes, and bad timing. A calm look at your numbers beats a hurried move every time. Slow down.

A fourth trap is forgetting taxes. Interest you earn is often taxed, so your real return after tax is lower than the rate on the page. If you earn 4 percent and owe tax on it, you keep less than 4 percent. Then inflation takes its bite from what remains. Taking out both matters. The tax rules for your situation are set by law, and the IRS publishes the details, so look there or ask a tax professional about your own case.

Last, remember that rates change. A savings rate that beats inflation this year may not next year. A plan built on one year's numbers needs a fresh look now and then.

Questions to answer before you leave this page

What does your savings account pay right now, and have you found that annual percentage yield on your latest statement? What is the most recent yearly inflation rate on the Bureau of Labor Statistics page, and is your rate above or below it? If you subtract one from the other, are you gaining buying power or losing a little each year? Which of your own bills have climbed fastest over the past year, and does the headline number match what you feel? How much of your money sits in cash that you will not touch for many years, and does that amount feel right to you? Do you know whether the interest you earn is taxed, and what you keep after that? And when will you look at all of this again, so it does not slip past you like the coffee can in my friend's garage?