Breaking down the utility charges on your residential bill
For ease of comparison, we list the Price to Compare before we break down the charges on your utility bill. Items A, B and C below
reflect the order in which they appear on your ComEd bill. When you select service from a retail electric supplier, the ComEd
Electric Supply Charges (including the Purchased Electricity Adjustment) and Transmission Services Charges (items A and B below)
will be replaced with the charges from your new retail
electric supplier. Currently, almost all suppliers will place their charges on your ComEd bill and some suppliers will send you a bill
directly (containing ComEd's delivery service charges as well as the supplier's supply and transmission charges).
Price to Compare = Electric Supply Charge + Transmission Services Charge
Historical Prices to Compare
Combining the electric supply charge and the transmission services charge, the ComEd Price to Compare
effective September 2014 is 7.665 cents per kWh.
At this time, only 78% of the expected electricity needed for the Non-Summer period has been purchased.
Consequently, the final Price-to-Compare for the Non-Summer period will not be known until the end of
September 2014 when the remaining Non-Summer period electricity will be purchased. As a result, starting
with the November 2014 billing period, the Price-to-Compare will change again slightly for the November 2014 – May 2015 period
Prior to June 1, 2013, ComEd's rate for residential space heating was different from the rate for residential non-space heating
accounts. As of June 1, 2013, the residential space heating and non-space heating rates are the same.
Price to Compare (in cents per kWh)
(October 2014 – May 2015)
These Prices to Compare do not include the Purchased Electricity Adjustment, which is a component of ComEd's Electric Supply Charges.
Please see the Section on Electric Supply below for a further description of the Purchased Electricity Adjustment.
A. Electric Supply
The electric supply charge is the price you pay per kilowatt-hour ("kWh") for the electricity you use in your home. The price
of electric supply is determined by your choice of supplier, whether it be a Retail Electric Supplier or ComEd.
(October 2014 – May 2015)
|6.651 cents per kWh
||6.473 cents per kWh
Over the course of a year, your average ComEd electric supply charge per kWh is likely somewhere between the summer rate and the non-summer
rate. Whether your average electricity supply charge for a 12-month period is closer to the summer rate or closer to the non-summer
rate depends on how much electricity you use and during which months you use it. Please take a look at your electric bill or log
in to your ComEd account here to see how much electricity you typically
use each month over the course of a year. You will be able to see your previous electricity usage by entering your ComEd account
number on this page
and selecting "View Summary Data Online".
Purchased Electricity Adjustment
A price adjustment (credit or charge) that is the difference between the revenues from the monthly ComEd Price-to-Compare and the actual cost of electricity supplied to ComEd customers.
This charge or credit, which ensures overall ComEd customers pay no more or less than ComEd’s actual cost of purchased electricity, is capped at a maximum of 0.5 cents/kWh each month,
with amounts outside of the cap deferred to the following month.
The Purchased Electricity Adjustment is calculated monthly, which means that the ComEd Price-to-Compare is adjusted monthly.
Attention Residential Real Time Pricing (RRTP) Customers
To make a meaningful comparison between variable RRTP rates and RES offers, customers should compare their past electric supply
cost savings from the total Electric Supply section of the bill, provided by their RRTP provider, with an electric supply
cost savings estimate provided by RESs. Competitive electric supplier savings estimates are often calculated as a percentage savings
compared to the utility's fixed-price electric supply rate stated in the Price to Compare table. Alternatively, customers can compute
their average real-time hourly price in cents per kWh (each month the average real-time price is equal to the total of the Electric Supply
section of the bill divided by the monthly kWh) to compare with RES offers posted in cents per kWh. Customers should bear in
mind, however, that because RRTP rates vary over time, past savings do not predict future savings, but only serve as a guide to
compare past performance.
B. Transmission Services Charge
Also included in the Electricity Supply Section on your ComEd bill is the Transmission Services Charge. The transmission services
charge is designed to allow the utility to recover costs associated with transmission service. The transmission services charge
usually changes annually and will change again in June 2015. ComEd's Transmission Services Charge effective September 2014 through May 2015 is 1.014 cents per kWh.
C. Delivery Service Charges
You will pay the charges to deliver the electric supply from the transmission system to your home or business regardless of whether you
purchase your electric supply from ComEd or a Retail Electric Supplier. These charges are listed in the Delivery Services section of
your ComEd bill.