The gas line on a utility statement and the electric line sit side by side on the page. In the Consumer Price Index, they sit in separate rows. That small split matters. It lets a reader watch one bill category without the other muddying the picture.
Why electricity and gas get their own CPI series
The Consumer Price Index, or CPI, is the Bureau of Labor Statistics' measure of how prices change over time for things urban households buy. Within it, utility (piped) gas service has its own series. The FRED page for that series, run by the St. Louis Fed, notes that the term refers to natural gas. Its series ID is CUUR0000SEHF02. Electricity appears as a separate series, titled "Consumer Price Index for All Urban Consumers: Electricity in U.S. City Average."
So energy is not reported only as one lump. A reader who cares about the heating bill can look at gas. A reader who cares about the summer cooling bill can look at electricity. The BLS also publishes a fact sheet called "Measuring Price Change in the CPI: Household energy," which treats household energy as its own measurement topic. You can find it on the BLS site.
What the gas series looks like in published form
Start with the format. The FRED version of the gas series is monthly. It uses a base of 1982-1984=100. That means the index treats the average price level in those years as 100 and expresses every other month relative to it. A reading of 250 would mean prices sit at two and a half times that base level. The version shown is also not seasonally adjusted. Gas use and pricing follow the seasons, so month-over-month moves are not smoothed for winter or summer patterns. A jump in January may partly be January.
The FRED graph adds a twist. Its title reads (index / 181.709 - 1) x 100, which turns the index into a percent change measured against a reference value of 181.709. The sources do not say which period that value comes from, or why FRED picked it. Treat it as a chart convention and not a headline BLS number. The FRED graph shows the setup.
How to read the two indexes side by side
Four habits help when you put the two series together. The first two are about the data. The last two are about what the data can and cannot tell you.
- Compare the direction over the same span. One index may have climbed faster than the other.
- Compare the same type of figure. A seasonally adjusted number and an unadjusted one do not line up cleanly.
- Remember what a gap means. A wider gap says the two national indexes moved differently. It does not say what your own bill did.
- Remember the scope. A CPI series tracks price change for a defined basket of purchases. It is not a record of any one customer's total utility spending.
That last point is the one people skip. A national average blends households with different usage, providers, and rate plans. Your own receipt may differ a lot from the national line. Close, maybe. Identical, rarely.
A worked path to finding the numbers
The sources do not print recent values, but they point to where those values live. Here is a practical route. Open the BLS category table, which lists the CPI for All Urban Consumers by expenditure category. Scan the rows under energy for the electricity and utility gas lines. Read across to the 12-month change column for each one. Write both down.
Then check the date at the top of the table. BLS labels each release by month, and the copy of the table referenced for this piece was titled "2026 M09 Results." A newer release may have replaced it by the time you read this, so confirm the label before you quote anything.
For a longer view, open the FRED gas series and its electricity counterpart. Set both to the same date range. Check whether each is adjusted or unadjusted, since the gas version discussed here is unadjusted. The BLS category chart also plots 12-month changes for selected categories, which can make the comparison faster.
What the available sources do not explain
Some pieces are missing. The retrieved BLS household energy and average price pages contained only site navigation. So this piece cannot say how BLS samples utility prices, how it weights electricity and gas inside the overall index, or how it collects the underlying data.
The sources also give no recent index values and no 12-month changes for either utility. Those numbers sit in the BLS CPI summary and the tables and charts linked above. Nor do the sources say how BLS treats rate plans, fixed-price contracts, or regional pricing differences. For those details, read the BLS methodology documentation directly. For your own bills, check with your utility or a qualified professional. This article is educational only.
