ComEd commercial electricity

What the U.S. government data says about ComEd

• Commercial customers402,5092025, EIA Form EIA-861
• Buy energy from a supplier71%of commercial kWh · 40% of customers
• Delivery price5.27¢average per kWh, delivery-only customers
• Default-service price15.13¢per kWh, customers on bundled service
• Outages38 mina year per customer · US average 124

In 2025, 71% of the commercial kWh delivered by ComEd went to customers buying energy from a competitive supplier, and 29% stayed on the utility's default service. By customer count it is 40%, because the businesses that shop tend to be the larger ones.

ComEd’s delivery charges averaged 5.27¢ per kWh across its 161,260 delivery-only commercial customers: the part of the bill no supplier can change. It is an average over customers of every size. Large customers pay far less per kWh than small ones, so your own delivery charge per kWh will differ; the average customer here used about 10,982 kWh a month.

ComEd customers went without power for an average of 38 minutes in 2025, excluding major storms, with about 0.54 interruptions per customer. The average across U.S. utilities reporting the same way is 124 minutes.

EIA records ComEd serving customers in 24 Illinois counties: Boone, Bureau, Carroll, Cook, DeKalb, DuPage, Ford, Grundy, Jo Daviess, Kane, Kankakee, Kendall, LaSalle, Lake, and 10 more. A county can be shared between utilities, so this does not tell you who serves a given address.

Source: U.S. Energy Information Administration, Form EIA-861, 2025 final data. Averages across all commercial customers of each service type: dated context, not a quote and not an available offer.

What ComEd controls and what it does not

Cities and areas in this territory

Territory boundaries do not follow city limits. Two addresses on the same street can sit in different territories, which is why we confirm the Account number rather than inferring eligibility from the city or the ZIP code. Inferring from location is the most common way a commercial account is told it can do something it cannot.

Chicago · Naperville · Joliet · Rockford · Aurora · Elgin

Which lever moves which charge

This is the question a utility page exists to answer. If you change something at the meter, which line on the bill actually moves — and which one does not move no matter what you do?

Fixed customer chargeNothing you do

A flat monthly amount for being connected. It does not move with consumption or with peak.

No lever

Volumetric distributionHow much you use

Charged per kilowatt-hour. This is the line that efficiency work moves.

Use less

Demand chargeHow hard you draw

Charged per kilowatt of billed demand. Set by your highest interval, not by your total — which is why cutting consumption may not move it at all.

Lower the peak

Riders and surchargesRegulatory filings

Adjusted periodically through approved filings. They step rather than scale, and nothing you do at the meter changes them.

No lever

Schematic shapes, not ComEd's actual rates — those come from the filed tariff. The point is the behaviour: two of these four respond to something you control, and a supplier changes none of them.

What sits inside the delivery charge from ComEd

Delivery is not one number. On a commercial account it is typically assembled from several components, each set by the filed tariff and each behaving differently as your usage changes:

• A fixed customer or meter charge, which does not move with consumption at all.
• A volumetric distribution charge per kWh, which scales with how much you use.
• A demand charge per kW where the account is demand-metered, which scales with how hard you draw rather than how much you use — and which is where a low load factor account gets hurt.
• Riders and surcharges, adjusted periodically through regulatory filings, covering items such as transmission cost recovery, energy efficiency programs and storm or system restoration costs.

None of these changes when you change supplier. Understanding the mix matters because it determines which action actually moves your bill: reducing consumption attacks the volumetric component, reducing peak draw attacks the demand component, and neither one touches the fixed charge.

The other territories in Illinois

Boundaries do not follow city limits. If you are not certain which of these serves your address, confirm the Account number printed on the bill rather than inferring it from the city.

What the ComEd tariff says: Small Load and Medium Load Delivery Classes (delivery charges)

Read 2026-10-30 from ComEd Schedule of Rates for Electric Service, ILL. C. C. No. 10, 2026 Ratebook, Delivery Service Charges Informational Sheet No. 64.3 effective February 28, 2025. Each figure is quoted from that document, and it is a schedule figure, not a bill estimate. See every tariff quoted on this site. The tariff and the schedule code on your bill control what applies to you.

Which classes this lists

ComEd sets delivery charges by delivery class. The Small Load Delivery Class applies to a nonresidential customer with demand metering, electricity entering the premises below 69,000 volts, and a highest 30-minute demand that did not exceed 100 kW over the most recent 12 monthly billing periods. The Medium Load Delivery Class applies on the same basis with a highest demand of more than 100 kW but not above 400 kW.

Small Load fixed monthly charges

Customer Charge (CC): $14.62 & ADJ. Standard Metering Service Charge (SMSC): $6.71 & ADJ. Both apply for each monthly billing period. These are the figures printed in the column for monthly billing periods in 2026; the table also prints a 2025 and a 2027 column.

Small Load per-kW and per-kWh charges

Secondary Voltage Distribution Facilities Charge (SV DFC): $12.50 & ADJ per kW, applied to the part of the Maximum Kilowatts Delivered that is served below 69,000 volts with transformation to below 2,400 volts by ComEd. Illinois Electricity Distribution Tax Charge (IEDT): $0.00124 & ADJ per kWh. Both are the 2026 column figures.

Medium Load charges (secondary voltage)

Customer Charge (CC): $24.78 & ADJ. Standard Metering Service Charge (SMSC): $11.56 & ADJ. SV DFC: $12.78 & ADJ per kW. IEDT: $0.00124 & ADJ per kWh. These are the figures printed in the column for monthly billing periods in 2026.

How the per-kW charge is measured

The per-kW charge applies to Maximum Kilowatts Delivered (MKD): the highest 30-minute demand in the monthly billing period, counted only during the periods from 9:00 A.M. until 6:00 P.M. on Monday through Friday, except on days designated as holidays by the North American Electric Reliability Corporation.

What & ADJ means

Every charge above is printed with the suffix & ADJ. The tariff says the delivery charges shown on bills include adjustments: factors for uncollectible costs, delivery reconciliation, excess deferred income tax, the total plan and revenue balancing, plus a distributed generation rebate adjustment on the per-kW charge, each listed on other informational sheets. The formulas start from the figures above.

Billed separately

Electricity supply is not in these figures. Under bundled Rate BES it is the Purchased Electricity Charge, shown on the bill as the Electricity Supply Charge, with a PJM Services Charge shown as the Transmission Services Charge and a Purchased Electricity Adjustment. Under delivery-only Rate RDS the customer contracts for supply separately. Riders and other generally applicable charges also apply.

What to pull off a ComEd bill before any conversation

• Account number — the identifier that determines territory and eligibility
• Rate schedule code as printed on the bill
• 12 months of kWh, and peak kW if the account is demand-metered
• The delivery and supply sections, kept separate
• Current supplier and contract expiry, if any