SampleA real ComEd home bill with the numbers changed, not yours. Sixteen charge lines in three sections, each of which has to add up to its own printed subtotal before anything else is claimed.
Sample · ComEd · Residential · May 1 to Jun 2, 2026
This bill checks out.
We read all 16 charges and added them up again. They come to $281.06, the same total ComEd printed. Every rate we could check against a public filing matched.
What this bill costs per kWh
18.52¢
per kWh, everything included
$281.06 ÷ 1,518 kWh
The price to compare
10.40¢
per kWh for supply
ComEd's price to compare for June 2026, posted by the Illinois Commerce Commission. It leaves out the purchased electricity adjustment.
Where the $281.06 went
Supply$161.35the electricity itself
Delivery$117.44wires, meter, ComEd
Taxes and fees$22.67state, city, programs
Credits−$20.40taken off the total
Two things this bill shows
A battery won't cut this bill's delivery charge
This rate has no demand charge. A battery sold on demand savings saves nothing here.
Summer runs 2.3× the quietest month
Jun '25May 1,259Jun 1,518
See all 16 charges, line by lineEach rate, how we checked it, and the filing it matches
Rate printed on the bill: Residential - Single.
16 lines read, 11 recompute to the cent from their own printed rate, 4 checked against filed records (ComEd filed ratebook, ICC posted price to compare).
All 16 charge lines, read, and they add up to $281.06
Every line on your bill was extracted and re-added. The computed total matches the Service Period Total ComEd printed, which is how you know nothing was missed or misread.
How, and the source
How
sum of 16 line items = $281.06 = printed total
Source
Your bill, charge details section
You are on ComEd's Single Family Without Electric Space Heat delivery class
We did not take this from the label on your bill, which does not say whether the home has electric space heat. We rebuilt the Distribution Facilities rate for all four residential delivery classes we hold and found the one whose rate matches the rate printed on your bill. We do not hold ComEd's rules for which class a customer belongs in, so this is the class you are billed on, not a check that it is the right one.
How, and the source
How
printed $0.06333/kWh matches Single Family Without Electric Space Heat in the June 2026 billing period
Source
ComEd filed ratebook, matched to your bill
Price to compare: 10.399 c/kWh; you paid 10.629 c/kWh
ComEd printed a price to compare of 10.399 cents per kWh. Your supply and transmission rates add to 10.399 cents, which is the same number -- consistent with being on ComEd's default supply rather than a retail supplier. What you actually paid for supply was 10.629 cents per kWh, because the price to compare excludes the purchased electricity adjustment and your bill includes it.
Your bill, supply section and the price-to-compare notice
You have no demand charge, so peak shaving saves you nothing on delivery
Your delivery charges are billed entirely on how much energy you use, not on how fast you use it. Cutting a short spike in your usage would not reduce this bill by a cent. Anyone selling you a residential battery on demand-charge savings in ComEd territory is selling a saving that does not exist on this rate.
How, and the source
How
Distribution Facilities Charge billed per kWh, not per kW
What you paid to buy the electricity, what you paid to have it delivered, and what you paid in taxes, fees and credits. Each section was re-added against its own printed subtotal.
How, and the source
How
Supply: lines sum to $161.35 vs printed $161.35; Delivery: lines sum to $117.44 vs printed $117.44; Taxes, fees and credits: lines sum to $2.27 vs printed $2.27
Source
Your bill, charge details section
The ICC posted 10.399 c/kWh for June 2026, the price your bill printed
The Illinois Commerce Commission posts ComEd's residential price to compare every month, and for June 2026 it posted 10.399 cents per kWh, the same figure your bill printed. That is a check against a source other than the bill itself. Your bill covers May 1, 2026 to June 2, 2026. ComEd's posted price rose from 9.660 (May 2026) to 10.399 (June 2026), and your supply lines were billed at the later figure for the whole period. On your 1,518 kWh the difference between the two postings is $11.22. A year earlier, June 2025's posting was 10.028, so this price is 0.371 cents higher than the same month last year. The ICC also posted the purchased electricity adjustment for June 2026 at 0.230 cents per kWh; the adjustment on your bill works out to 0.230 cents per kWh on the same 1,518 kWh, which agrees.
How, and the source
How
printed 10.399 c/kWh = ICC posting for 2026-06; (10.399 - 9.660) c/kWh x 1,518 kWh = $11.22; PEA $3.49 / 1,518 kWh = 0.230 c/kWh vs posted 0.230
Source
Illinois Commerce Commission, Historical Prices to Compare for ComEd, retrieved 2026-08-31; residential non-space-heat class
13 months of usage, from 1,259 to 2,894 kWh a month
Your highest month was August at 2,894 kWh; your lowest was May at 1,259 kWh. That is a 2.3x swing across the year.
1,519Jun
2,694Jul
2,894Aug
2,513Sep
1,853Oct
1,482Nov
1,810Dec
2,796Jan
2,122Feb
1,742Mar
1,489Apr
1,259May
1,518Jun
How, and the source
How
max 2,894 / min 1,259 = 2.30x
Source
Your bill, the usage graph
Know which lines on your bill can move and the levers that move them.
The bill reader: your electric bill read line by line, and the ComEd delivery charges we hold filed rates for checked against those rates
On a ComEd bill, the delivery charges we hold ComEd's filed rates for are rebuilt from those rates, for the billing periods those filings cover, and every other line is checked against the bill itself. A bill from any other utility is read as far as the reader can take it.
The reading built from your own ComEd interval data is $99. The first two are waived. Once that data arrives, the interval analyzer and the reconciliation tool read it, and both are free.
We keep the text of the bill you upload, with your name, address and account number removed. We never sell or share what we keep.
When the reader refuses a bill whose layout it does not know, that screen may offer to keep the one bill so we can teach the reader that layout. On your ticked consent, the PDF is stored encrypted and deleted when your reading is delivered or at day 30, whichever comes first. Without that tick, the PDF is not kept, and nothing on it is sold or shared.
