The point in 30 seconds
Prices can keep rising while inflation falls. Slower increases can help, but they do not undo the increases that came before.
The price and the pace are different numbers
You hear that inflation is coming down. Then you buy groceries and wonder what, exactly, is supposed to be better.
The missing distinction is the difference between the level of prices and the rate at which those prices change. If inflation drops from 8% to 2%, the average price level is still rising. It is rising more slowly. Economists call that disinflation. A falling price level is deflation. [2]
Those words describe different outcomes. Confusing them makes it easy to overstate good news or dismiss it altogether.
Follow one $100 basket
Consider a hypothetical basket that costs $100. An 8% increase takes it to $108. A further 2% increase takes it to $110.16. The second increase applies to the new price, not the original $100.
The annual rate fell sharply. The basket still costs 10.16% more than it did at the start. Both statements are true.
Even zero inflation in the second year would leave the basket at $108. To return from $108 to $100, its price would need to fall about 7.41%. A smaller positive increase cannot do that.
Change the assumptions below. Try 0% in the second year, then a negative rate. This is a math example, not the actual U.S. inflation path.
Try the math
Your assumptions / hypothetical
Two successive annual price changes. These are not historical observations.
Enter a positive starting price and rates above -100% and no greater than 100%.
The basket costs 10.16% more than at the start.
Bar lengths start at zero. Formula: starting price × (1 + first rate) × (1 + second rate), with rates expressed as decimals.
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What the recent numbers actually say
BLS reported that the CPI-U rose 3.7% over the twelve months ending September 2026, up from 3.4% in August. These annual rates are not seasonally adjusted. The September release was published October 14 and was the latest CPI release available when this article was checked on November 1. [1]
So this article’s title describes a common question, not a claim that the latest annual rate fell. We use the hypothetical 8%-to-2% example to explain the distinction.
A monthly change and a twelve-month change also answer different questions. A single quieter month does not erase a difficult year, and one expensive purchase does not establish the inflation rate for the whole economy.
The next question is what happened to income
A price level that stays high can become easier to manage if your income catches up. It can become harder to manage if your hours are cut or a major expense rises faster than your pay.
That is why inflation and affordability deserve separate questions. What happened to prices? What happened to earnings? Which expenses matter most to this household?
When someone says inflation is down, ask: down from when, measured over what period, and do they mean prices or the rate of increase? Then ask whether purchasing power improved. You will learn more from those follow-ups than from the headline alone.
Sources & dates
Sources checked November 1, 2026. Release dates, observation periods, and retrieval dates are different. Later releases may revise the data.
- BLS: Consumer Price Index, September 2026 Released October 14, 2026 · Observed national data
September 2026; twelve-month changes are not seasonally adjusted.
- St. Louis Fed: The Inflation Rate Is Falling, but Prices Are Not Published March 1, 2024 · Economic explanation
Foundational explanation, not a current data release.