Quick Answer
Your electric bill has two parts: supply (generation) and delivery (distribution). Supply is 40-60% of your total and the only part you can shop. Find your Price to Compare on AEP Ohio, Duke Energy, PECO, or Eversource bills. Beat that rate on ElectricRates.org to save.
Understanding Your Electric Bill
Most people glance at the total, pay the bill, and move on. Fair enough. But if you want to save money on electricity, you need to understand what you're paying for.
Every bill from AEP Ohio, PECO, Eversource, or any other utility shows the same basic stuff: your account info, meter readings, how much electricity you used, and all the charges broken down.
Here's what matters in deregulated states: your bill splits into two main parts. Supply charges are what you pay for the electricity itself - that's the part you can shop around for. Delivery charges are what your utility charges to get the power to your house - those stay the same no matter who you buy from.
Once you understand that split, you can compare rates and know whether switching suppliers makes sense. It takes maybe 10 minutes to learn your bill. That's worth it to catch errors and find savings.
Your Bill at a Glance
- Supply charges = what you can shop for
- Delivery charges = stays the same with any supplier
- Total rate = supply + delivery + taxes/fees
Account Information Section
At the top of your bill, you'll find your account details. This is the boring stuff, but you need to know where it is.
Your account number is the big one. You'll need it when switching suppliers or calling your utility about anything. The service address shows where the electricity goes, which might be different from where you get mail. Rate class tells you what type of customer you are - for most people it says "Residential" or just "RS." And the meter number identifies the specific meter on your property.
If you have multiple properties or meters, double check you're looking at the right account. Easy mistake to make.
One thing: keep your account number private. Scammers can use it to switch your service without permission. It happens.
Billing Period and Due Date
Your bill covers a specific chunk of time, usually 28 to 32 days. The "from" and "to" dates show exactly which days you're paying for. Keep in mind the bill arrives after that period ends, so you're always paying for electricity you already used.
These dates help you spot patterns. If your January bill is through the roof, check whether it covered a particularly cold stretch. Tracking this stuff over time tells you a lot about your usage.
The due date is pretty self-explanatory. Miss it and you'll pay late fees, usually 1 to 2 percent of your balance. Most utilities give you a small grace period, but don't count on it.
If you hate remembering due dates, set up automatic payment. Budget billing is another option - it spreads your costs evenly through the year so you're not getting slammed with a huge summer AC bill or winter heating spike.
Meter Reading and Usage
This section tells you exactly how much electricity you used. The math is simple: take the current meter reading, subtract the previous one, and you get your kWh for the month.
You'll see whether it's an "actual" read or "estimated." Actual means someone read the meter or a smart meter transmitted the data automatically. Estimated means they couldn't access it, so they guessed based on your history. If they estimated high, the next actual read will adjust. If they estimated low, you'll see a catch-up charge.
For context, most homes in Texas, Ohio, Pennsylvania, and Massachusetts use somewhere between 600 and 1,000 kWh per month. That varies a lot depending on your house size, how hot or cold it gets, and what appliances you're running.
Pay attention to this number each month. If it suddenly jumps way up and you haven't changed anything, something might be wrong. Could be a faulty appliance, could be a billing error. Worth looking into either way.
Supply Charges and What You Can Shop For
Supply charges, sometimes called generation or energy charges, are what you pay for the electricity itself. This is the portion you can shop for in deregulated states.
If you haven't picked a supplier, you're on your utility's default rate. In Ohio that's the Standard Service Offer. Pennsylvania calls it the Price to Compare. Massachusetts uses Basic Service. These default rates are fine, but they're usually not the cheapest option.
If you've switched to a competitive supplier, their name shows up on the supply portion of your bill. That's how you know the switch went through.
To figure out your actual supply rate, take your total supply charges and divide by your kWh usage. That gives you your effective rate per kWh. This is the number you compare against offers from other suppliers.
Watch out for monthly service fees though. Some suppliers tack on an extra five or ten bucks that doesn't show in the per-kWh rate. Always check the total supply section, not just the headline rate.
Finding Your Supply Rate
Delivery Charges and What Stays the Same
Delivery charges, sometimes called distribution or transmission charges, pay for getting electricity from power plants to your house. We're talking power lines, substations, transformers, meters, and the utility's customer service operation.
Here's the important part: these charges don't change when you switch suppliers. They're regulated, and your utility - whether that's AEP Ohio, PECO, PPL Electric, Eversource, or National Grid - collects the same amount no matter who generates your power.
You'll typically see a fixed customer charge just for being connected, usually somewhere between $5 and $15 per month. Then there are variable charges based on how much electricity you use.
When you're shopping for electricity, ignore the delivery portion. It stays the same either way. Focus entirely on comparing supply rates. That's where switching can save you money.
Taxes, Fees, and Riders
Beyond supply and delivery, your bill has a bunch of other charges. Taxes, fees, riders - all that stuff.
Some of these are straightforward. State and local taxes work just like sales tax on anything else. Utility riders fund specific programs: renewable energy requirements, energy efficiency initiatives, transmission upgrades, low-income assistance, and infrastructure improvements.
Here's what you need to know: these charges are regulated, they apply regardless of which supplier you choose, and there's no way to avoid them. Everyone pays the same taxes and riders.
That means when you're comparing suppliers, don't sweat the tax and rider portion. Focus on the supply rate. That's the only part where switching makes a difference.
Finding Your Actual Electricity Rate
Before you can know if a supplier offer is good, you need to know what you're paying now. Here's how to figure it out.
For your total blended rate, divide your entire bill by your kWh usage. If you paid $150 for 1,000 kWh, you're paying 15 cents per kWh overall. This includes everything - supply, delivery, taxes, fees.
For your supply-only rate, take just the supply charges and divide by usage. This is the number to compare against supplier offers, since they can only replace the supply portion.
Most residential bills in Texas, Ohio, Pennsylvania, and Massachusetts work out to somewhere between 12 and 20 cents per kWh total. Supply is usually 40 to 60 percent of that.
Here's a common mistake: if a supplier offers 6 cents per kWh, that doesn't mean your total bill drops to 6 cents. It just replaces your supply charges. Your delivery, taxes, and fees stay the same.
Your Usage History Graph
Most bills include a bar graph showing your usage over the past 12 months. This is useful, not just decoration.
The graph shows your consumption patterns. Summer spikes usually mean air conditioning. Winter spikes could be electric heating or all those holiday lights. Seasonal variation is normal - what you're looking for are patterns that make sense for how you live.
To really understand your electricity use, add up all 12 months to get your annual total. That's a better number for comparing supplier offers than any single month, which might be unusually high or low.
If you see a month that looks way off from the pattern and you can't explain why, dig into it. Could be equipment problems, could be a billing error, could just be extreme weather. Worth figuring out either way.
Common Billing Errors to Watch
Billing errors happen more often than you might think. A quick monthly review can save you real money.
Watch for estimated reads that seem way too high. Check that your rate matches what your contract says. Make sure the meter number is yours - paying for your neighbor's electricity is a thing that happens. Look for duplicate charges or fees you don't recognize. And if you recently switched suppliers, verify the switch date and new rate are correct.
If you spot something wrong, don't just stew about it. Call your utility or supplier right away. Explain what looks off. Most disputes get resolved with a simple phone call, especially if you catch them quickly.
The sooner you address an error, the easier it is to fix. Waiting several months makes everything harder. Check your bill within a week of getting it.
Check Your Bill Monthly
Frequently Asked Questions
Why is my supply rate different from what the supplier quoted?
What does "estimated reading" mean on my bill?
Why do I have charges from both my utility and a supplier?
How do I calculate my cost per kWh?
What is a customer charge or service fee?
Can I dispute a charge on my electric bill?
How do I know if I'm overpaying for electricity?
Looking for more? Explore all our How-To Guides guides for more helpful resources.
About the author

Consumer Advocate
Brad has analyzed thousands of electricity plans since 2009. He understands how electricity pricing works, why some "low" rates end up costing more, and what to look for in an Electricity Facts Label. He writes to help people make sense of a confusing market.
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Topics covered
Sources & References
- U.S. Energy Information Administration - Electricity Data Browser (U.S. Energy Information Administration): "Average residential electricity prices by state"Accessed Feb 2025
- PUCO - Understanding Your Electric Bill (Public Utilities Commission of Ohio): "PUCO guidance on understanding electric bills"Accessed Feb 2025
- PA PUC - Understanding Your Bill (Pennsylvania Public Utility Commission): "PA PUC consumer education on electricity billing"Accessed Feb 2025
Last updated: September 25, 2025


