If you compared a 2026 ComEd bill against a 2025 one and concluded that the delivery side had grown a set of new charges, you read it correctly and drew the wrong conclusion. Fewer of those lines are new than they look. Most of them were always there, folded into one number, and a rate case changed how they get printed.
Telling the two apart matters, because one of them is worth reacting to and the other is worth ignoring.
What changed, and under what
The Illinois Commerce Commission's rate design investigation, Docket 24-0378, restructured how ComEd's delivery service charges are presented. Before it took effect, the adjustments that sit on top of the base rate were combined, and the bill showed you a single consolidated rate per kilowatt. From 2026 billing periods, each adjustment is applied to the base rate and rounded on its own line, and the lines are added.
The adjustments themselves have names, and they are the reason the delivery side looks busy. They are filed as factors on ComEd's informational sheets, and they carry abbreviations you would have to go looking for to decode: IDUFN, DRAF, EDAF, TPAF, RBAFD and DGRAD, filed across Informational Sheets 9, 18, 20, 56 and 65 and traceable back to riders including DSPR, RBA, the distributed generation rebate rider and MRPP.
The filed relationship between them is not a secret. It is arithmetic: the base charge is multiplied by the sum of the adjustment factors, and a per kilowatt rebate factor is added on. That is the whole mechanism.
Why this makes the bill feel more expensive than it is
A single number that becomes six numbers reads as an increase even when the total is flat. That is not a trick, it is a well-known effect of itemization, and it is the reason this question comes up at all.
There is also a real arithmetic wrinkle. When each line is rounded to the cent separately and then summed, the total differs slightly from the old approach of rounding once at the end. The difference is cents on a rate, not a policy change. We reconcile both eras and they land on the bill exactly, under their own rules.
The rates themselves did move between 2025 and 2026, and they did not all move the same direction. The filed base rates by delivery class are on the Distribution Facilities Charge page. Some classes came down; one went up. That is a separate fact from the presentation change and it should be checked separately.
The comparison that actually answers it
Two bills, and one number from each. This does not require interval data, software or anyone's help.
Take the total delivery charge on a 2025 bill and divide it by the billed kilowatts on that bill. Do the same on a 2026 bill. You now have two effective rates per kilowatt, computed the same way, immune to how many lines each bill used to get there.
If the two are close, your delivery pricing did not meaningfully change and the extra lines were presentation. If the 2026 figure is materially higher, something real moved, and the next question is whether it moved because the filed rate changed or because your billed kilowatts did.
That last distinction is where most of the money hides. A delivery bill can rise while every filed rate falls, because the charge is a rate multiplied by your single highest qualifying half hour. If your peak demand grew, the bill grew, and no amount of reading the rate lines will show you that.
Which of these lines you can do anything about
Honestly: none of them, directly. The adjustment factors are filed with the Commission and applied uniformly to your class. There is no version of your account that pays a different DRAF. Time spent trying to negotiate the delivery rate is time spent on the one part of the bill that is not negotiable by design.
What is movable is the quantity the rate multiplies. That is the half hour that set your billed demand, and whether it can be moved or reduced is a question about your own load, answerable from the interval data behind the bill rather than from the tariff.
Why does my 2026 ComEd bill have more delivery lines than my 2025 bill?
Because the rate design investigation under ICC Docket 24-0378 restructured the presentation. Adjustments that were previously consolidated into one rate are now applied and rounded individually and printed as separate lines.
Did ComEd delivery rates go up in 2026?
The filed base rates changed by delivery class and did not all move the same way. Some classes came down and one came up. The way to answer it for your account is to divide the delivery total by the billed kilowatts on a bill from each year and compare the two effective rates.
What are IDUFN, DRAF, EDAF, TPAF, RBAFD and DGRAD?
They are the delivery-service adjustment factors ComEd files on its informational sheets and applies on top of the base distribution rate. They are set by filing, applied by class, and not specific to your account.
Can I negotiate my ComEd delivery charge?
No. Delivery is a regulated monopoly service priced by the filed tariff for your class. The only part of the delivery charge that responds to anything you do is the billed demand it is multiplied by.