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Energy bills can be complicated and mysterious. While the cost of apples (for example) is the number of apples times the price per apple, utilities slice and dice their energy "apples" (or units) in a variety of ways. And many utilities don't make it clear how much their whole apples cost you (they instead tell you the price for every little slice).
The purpose of this article is to help you understand your Commonwealth Edison (ComEd) energy bill. So you can take control and cut it. The next article in the series will show you quick and easy ways to cut it.
To see your current energy rates, click here to scroll down.
This article is focused on your electric bill. When we say energy, we mean electricity. The article doesn't consider natural-gas heating.
A "Tiered rate plan" is a rate plan where the amount you pay per kWh for electricity increases as the quantity of electricity consumed increases. Generally there is a baseline allowance of a certain number of kWhs (kilowatt hours) per month that are charged at a cheaper rate, and then usage above this allowance is charged at a higher rate.
A "Time-of-Use" rate plan is an electricity plan where the amount charged per kilowatt hour (kWh) is determined by the time of the day and the season of the year in which it is used.
Time-of-Use plans will typically have "peak" periods with higher rates and "off peak" with lower rates.
The idea behind time of use billing is to get customers to use less power at peak periods (when most people use a lot of power). Peak periods put a lot of strain on the grid. This is why time of use billing is being implemented by all major utilities. It is an attempt to encourage consumers to help spread out the load, and thus reduce investment needed to support brief periods of extremely high usage.
If customers can adjust their habits to use appliances at non-peak times they have to potential to significantly lower their electricity bills. Although, as power at peak times is much more expensive, if you continue to use lots of power at peak times your bill could be higher.
How does our rate plan work?
Your energy bill has two parts:
- A service charge
- An energy charge
The service charge
The service charge is the same for all households — whether they run a single desk fan or a hundred air conditioners. It covers ComEd expenses that aren't directly related to your energy usage. Examples are ComEd's phone-support staff, and the hold music you hear while waiting for phone support. The service charge doesn't change month by month. It's only about 15% of a typical family's total monthly energy bill ($17 out of $112/mo).
The energy charge
Unlike the service charge, the energy charge is based on actual usage. What's the energy unit that ComEd uses? Like other U.S. utilities, they charge per kilowatt-hour, abbreviated as kWh.
Let's use the classic light bulb example to understand kilowatt-hours:
100 light bulbs x 10 watts per light bulb = 1,000 watts. A "kilo" is a thousand, so 1,000 watts = 1 kilowatt.
…If the light bulbs are left on for 1 hour, that's 1 kilowatt x 1 hour = 1 kilowatt-hour (when in doubt, just squish words together).
Let's make sure you got that.
How many kilowatt-hours are used if you leave one hundred 10-watt light bulbs on for an hour?…1 kilowatt-hour.
Here are the steps:
100 light bulbs x 10 watts each = 1,000 watts.
Divided by 1,000 = 1 kilowatt (there are 1,000 watts in a kilowatt).
Left on for 1 hour = 1 kilowatt-hour.
Standard energy unit
Unit name: kilowatt-hour
Abbreviated as: kWh
Now let's talk money. How much does ComEd charge to keep this single kilowatt-hour (kWh) of light bulbs on for an hour? They charge 13¢ per kWh. One kWh multiplied by 13¢ per kWh equals…13¢. If the 100 light bulbs were kept on 24x7 for a month (based on 30 days = 720 hours straight), ComEd would charge $93.60.
ComEd customer's energy bill?
A typical family in ComEd territory uses 874 per month on average (for perspective, they'd get to the same total by keeping 20 typical laptops on 24x7). They pay $112 per month for those 874 kilowatt-hours. How does your home compare?
How do ComEd rates compare to the national average?
ComEd rates are about the same as the national average — both the ComEd rate and the average national residential rate is 13¢ (rounded).
Does ComEd charge a premium in the summer?
Yup, summer rates are 5% higher than winter rates. Between this and higher summer usage, the average summer bill is 33% higher than the average winter bill ($134 vs $101 per month). ComEd's summer-rate season goes from June 1 to September 30.
Would we have a lower bill on a different ComEd rate plan?
Many utilities now offer an optional "Time-of-Use" rate plan. Time of use gives you more control of your energy bill. Unfortunately, ComEd doesn't offer this newer type of rate plan (yet).
Newer type of rate plan
Typically referred to as: Time of Use
Abbreviated as: TOU
The good news is that you don't need a different rate plan to cut your bill. The next article in this series will walk you through other bill-cutting opportunities.
Find out how much you could save with time-of-use. Get personalized results with the Cut My Bill calculator. It's Free and Easy!Calculate
What are our current ComEd energy rates?
Assuming you're on ComEd's default residential rate plan (code name: BES), here are the rates you currently pay:
Default plan's rates
|Plan Name:||Residential - Single-Family (BES)|
|Last Update:||June 1, 2018|
|Fixed Charge:||Service Charge: $16.82|
|Summer (June 1 to September 30)|
|All Year Rate:||$0.114|
|Winter (October 1 to May 31)|
|All Year Rate:||$0.12|
Are the rates shown here accurate?
Determining the actual rates charged by a utility can be daunting, so websites typically just publish general estimates. Cut My Bill is different — we're showing you your real up-to-date ComEd rates. Here are the nitty gritty charges we've accounted for: generation services, environmental cost recovery adjustment, taxes and other, retail delivery service charge, distribution facilities charge, IEDT charge, state tax, renewable portfolio standard, zero emission standard, delivery services, customer charge, standard metering service charge.
Rates can be verified here.
How do I work out if I am on the cheapest ComEd rate plan for my usage pattern?
To do an exact comparison on how much you would save from switching plans requires collecting your detailed usage data for the last 12 months. This is known as Interval Data and sometimes also called Green Button Data.
What are the best ways to cut our bill?
We're glad you asked. Let's continue to the article: Three Best Ways to Cut Your Commonwealth Edison Bill.
Ready to stop reading and start cutting (your electric bill)? Click HERE to see how much you can save by installing solar panels. The Cut My Bill calculator is free and easy.