A COLA is the yearly increase to Social Security benefits meant to keep up with rising prices. Plenty of people want to know how the number is built. This article started from three Bureau of Labor Statistics pages, and those pages do not answer that question. So this piece sticks to what they can support, says plainly where they stop, and points you toward where an official figure would have to come from.
The sources behind this article include a September 2026 CPI release, but no COLA figure, percentage, or effective date.
What the sources actually show
The one concrete item is a Bureau of Labor Statistics release titled Consumer Price Index Summary, 2026 M09 Results. It is published under the U.S. Department of Labor. The title tells us it covers September 2026. That is about all we can confirm from it.
The text captured from that page was site navigation. No index values, no monthly changes, and no annual changes came through. A PDF version of the same release also failed to load as readable text. We cannot quote a single price number from either one. If you want the actual figures, open the release on the BLS site and read it there.
What the sources leave out
A third page, Uses of the Consumer Price Index, was cut off before its main text. We saw only its title and menus. We cannot say what it lists as uses, so this article does not describe them.
That leaves real holes. None of the three sources covers these points:
- Which CPI series is used for the COLA.
- How index data is turned into a benefit percentage, and by whom.
- What rounding rules apply to the result.
- When the annual announcement comes out.
- How a COLA changes a monthly payment, or whether it interacts with Medicare premiums.
You may have read confident explanations of these points elsewhere. They may well be accurate. But nothing here lets us verify them, so we are not repeating them as settled fact. Treat any single month of CPI data as background, not as a benefit forecast. One month of price data is a snapshot, and we do not know from these sources how much of it, if any, feeds into a yearly adjustment.
A plain-language example, clearly hypothetical
The basic idea of a price-based increase is simple, even though the official math is not shown here. Say a basket of goods costs 100 dollars one year and 103 dollars the next. Prices rose 3 percent. A household needs 3 more dollars to buy the same basket.
Now apply that to a benefit. Take an invented monthly payment of 1,000 dollars and an invented 3 percent increase. The payment rises by 30 dollars, to 1,030 dollars. Those numbers are made up for illustration. They are not a forecast, and they are not a real COLA. They also say nothing about which prices would be counted or how the percentage would be rounded.
Real life is messier. A household that spends a lot on medical care or heating may see prices differently than a national average does. A price index tracks broad averages. Your own bills may move more or less than the headline number, and a person on a fixed income often notices the gap first at the checkout line.
Why the deposit may differ from the headline
A percentage in a headline describes an increase before anything else happens to it. What lands in a bank account can differ. Some people may have amounts withheld from their payments, for example for health coverage premiums. Our sources do not cover that, so we cannot say how any withholding would change a given increase. The rules that apply to you would need to come from official program material.
The practical point is to compare like with like. If a notice shows a gross amount and a net amount, look at them separately. Budgeting from the net number makes sense, since that is the money you can actually spend. A raise of 30 dollars on paper can feel smaller if a deduction rises at the same time.
Where to find the real number
A BLS price report is not a benefit announcement. It reports on prices. We could not verify any Social Security Administration material for this article, so we are not linking to any and we are not describing its process. The Social Security Administration runs the program, so its own website is the logical place to look for official COLA information. Look there for the figure, the date, and any notice addressed to you.
For the price data itself, the BLS release linked above is the primary source. Read the full text on the BLS site rather than relying on a summary or a social media post. Summaries drop details, and the details are what we could not get.
Here is a simple test for any headline that gives a COLA percentage. Find the issuing agency and the date. If neither is named, wait for the official notice before you change your budget. A number with no named source and no date is not worth planning around.
