Inflation is the rate at which the prices of everyday goods and services rise over time. When it goes up, each dollar buys a little less than it did before. In the United States, prices rose 3.4 percent over the 12 months ending in August 2026, according to US Inflation Calculator, which tracks Labor Department data.
That number is not an abstraction. It shows up in your grocery receipt, your rent, and your utility bill. Understanding what the figure measures, and what it leaves out, is the first step to judging how inflation actually affects a household budget.
This explainer walks through how the number is built, why prices rise in the first place, and what the rate means for wages, savings, and debt. It is general information, not financial advice.
What does the word "inflation" actually mean?
Inflation is an increase in the average price of goods and services across an economy, measured with a price index. As Wikipedia's overview of inflation explains, when the general price level rises, each unit of currency buys fewer goods and services, which means purchasing power falls. The opposite is deflation, when prices fall across the board.
One point trips people up often. Inflation is about the general trend, not any single price. If cucumbers get more expensive because shoppers suddenly want more of them, while tomatoes get cheaper, that is a shift in tastes. It only becomes inflation when prices rise broadly, across many items at once.
Economists also distinguish related terms. Disinflation means inflation is slowing but still positive. Hyperinflation is an out-of-control spiral. Stagflation combines rising prices with slow growth and high unemployment. Each describes a different situation, and they are not interchangeable.
How is inflation measured with a basket of goods?
The most familiar measure is the Consumer Price Index, or CPI. The Bureau of Labor Statistics, which publishes it monthly, maintains the data at its CPI program page. Think of the CPI as a very large shopping basket: food, rent, gasoline, clothing, medical care, and hundreds of other items a typical urban household buys.
Each month, the agency tracks what those items cost. Then it compares the basket's total price to the same month a year earlier. The percentage change is the inflation rate you see in headlines. The math is simple: subtract last year's index value from this year's, divide by last year's, and multiply by 100.
The basket is weighted. Housing and food count for more than, say, pet supplies, because households spend more on them. That means a spike in rents moves the headline number more than a spike in a niche product does. Your personal inflation rate can differ from the official one if your spending mix looks nothing like the average basket.
There is a second yardstick too. The Federal Reserve prefers a different index, the PCE price index, which it describes on its inflation at-a-glance page. The Fed notes the PCE index adapts more quickly to changes in how Americans actually spend their money. So the two measures can move slightly differently in the same month.
Why do prices rise in the first place?
Price increases trace back to a handful of forces, and they often work together.
- Demand shocks. When people, businesses, or the government spend more freely, buyers compete for the same goods, and sellers can charge more.
- Supply shocks. When energy crises, crop failures, or shipping disruptions shrink what is available, prices climb even if demand stays flat.
- Money and credit. A growing money supply or a significant drop in central bank interest rates can push prices up over time.
- Expectations. If households and firms expect prices to keep rising, they act on it, and those expectations can become self-fulfilling.
Recent American history shows how these forces stack. The data compiled by US Inflation Calculator shows annual inflation peaking at 9.1 percent in June 2022, then easing through 2023 and 2024 before settling near 3 percent. The 2022 surge reflected supply disruptions colliding with strong demand. The cooling that followed reflected both pressures easing.
Deflation has appeared too. The same record shows negative months in 2009, during the financial crisis, when falling prices were a symptom of a collapsing economy rather than a gift to shoppers.
What does inflation mean for your money?
For wages, the effect depends on the gap between raises and prices. If your pay rises 3 percent while prices rise 3.4 percent, you have lost ground in real terms, even though the number on your paycheck grew. Workers negotiating new contracts face this directly, because purchasing power erodes between raises.
For savings, inflation quietly taxes cash. Money sitting in a low-interest account buys less each year. That is one reason economists note that moderate inflation pushes people toward lending and investing rather than hoarding cash.
For debt, the picture is more mixed. If you owe a fixed amount, say a fixed-rate loan, inflation shrinks the real value of what you repay. Future payments are made in dollars worth less than the dollars you borrowed. Borrowers with fixed-rate debt tend to benefit; lenders tend to lose.
There are upsides worth knowing. According to Wikipedia's summary of the economics literature, most economists favor a low and steady rate of inflation because it helps labor markets adjust and reduces the risk of a liquidity trap, where standard monetary policy loses its grip. A little inflation gives the economy room to breathe. The danger sits at the extremes: rapid inflation breeds hoarding and shortages, while deflation encourages people to delay spending, which can deepen a downturn.
Who is responsible for keeping inflation in check?
In the United States, that job belongs to the Federal Reserve. The central bank has a dual mandate to promote maximum employment and stable prices, and it adjusts monetary policy, mainly interest rates, to steer inflation toward its target. Per the Federal Reserve's own explainer, that target is 2 percent over the longer run, measured by the PCE price index. We covered a connected angle in FCC delays promised drop in prison phone call rates.
The target is not a ceiling to panic about. It is a zone the Fed aims for deliberately, because a small positive rate gives the system flexibility. When inflation runs well above target, the Fed typically raises rates to cool borrowing and spending. When it runs below, the opposite.
What this means for you: the headline rate is a policy input, not just a news item. Decisions made in response to it shape mortgage rates, savings yields, and hiring conditions, usually with a lag of many months.
Our analysis: what to watch, and what to ignore
The monthly number gets outsized attention. A single month can swing on energy prices or a seasonal quirk, and the BLS itself publishes an average annual rate that, as US Inflation Calculator notes, rarely makes the news. For judging your own finances, the 12-month figure matters more than the month-to-month wobble.
Two practical habits help. First, compare your own spending basket to the official one. If rent dominates your budget and housing is rising faster than the headline, your felt inflation is higher than the reported rate. Second, track your pay against the same period's inflation rate, not against last year's. That is the honest test of whether you are keeping up.
Prices rising slowly and steadily is the normal state of a modern economy, and it is the state policymakers aim to maintain. What remains unknown in any given month is where the rate is heading next, which depends on forces, supply chains, energy markets, hiring, that no single statistic fully captures.
For related coverage of how economic and enforcement systems work, see our explainers section, including our guide to wage theft: how workers actually recover unpaid pay, or browse business news for ongoing coverage.
