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 January 2014 through May 2014 is 5.523 cents per kWh.
Electric supply charges for June 2014-May 2015 will not be determined until May 2014.
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)
(January 2014 – May 2014)
These Prices to Compare do not include the Purchased Electricity Adjustment, which is a component of ComEd's Electric Supply Charges.
It is expected that the Purchased Electricity Adjustment for the period until May 2014 will be a charge (rather than a credit) for most months.
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.
(January 2014 – May 2014)
|4.604 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
You will also notice on your bill a monthly "Purchased Electricity Adjustment" that causes the electric supply charges to fluctuate above
or below the established electric supply rate from one month to the next. The purpose of the Purchased Electric Adjustment is to "true-up" any
difference (over or under) between what ComEd previously paid to acquire electric supply and what ComEd previously charged its customers for that
electric supply. When calculating the utility's electric supply price for ComEd's Price to Compare, we do not include a value for the Purchased
You will not be subject to the Purchased Electricity Adjustment when you switch to a retail electricity supplier.
During the most recent two-year period (June 2011 to May 2013), the Purchased Electricity Adjustment was a credit for 5 months
(lowering your bill) and a charge (increasing your bill) for 19 months. In 15 of those 19 months, the
Purchased Electricity Adjustment was a charge of 0.5 cents per kWh.
For the period December 2013 to May 2014, it is expected that the Purchased Electricity Adjustment will
continue to be a charge rather than a credit for most months. ComEd currently employs a voluntary
cap that ensures that the Purchased Electricity Adjustment charge (or credit) will never be higher than 0.5 cents per kWh for any given month.
Given today's expectation about the various components that determine the value of the Purchased Electricity Adjustment,
it is reasonable to assume that the Purchased Electricity Adjustment for the period until May 2014
will be a charge for most months. Keep in mind that this is an estimate only.
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 2014. ComEd's Transmission Services Charge effective September 2013 through May 2014 is 0.919 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.