An electric is one-twelfth of your annual electricity use, measured in kilowatt-hours

When you see "electric" on a bill or hear someone say "my electric is high this month," they mean the cost of the electricity you consumed during that billing period — usually one month. The actual amount you pay depends on two things: how many kilowatt-hours (kWh) you used, and the rate your utility company charges per kWh in your area.

A kilowatt-hour is the unit utilities use to measure electricity. One kWh is what a 1,000-watt device uses in one hour. A 100-watt light bulb running for 10 hours equals one kWh. Your meter tracks this continuously, and the utility reads it monthly to calculate what you owe.

The rate per kWh varies by location and utility company. In some states it might be 12 cents per kWh; in others it could be 18 cents or higher. Your bill shows this rate clearly, usually labeled as "rate per kWh" or "energy charge." Multiply your kWh used by that rate and you get the base cost before taxes and fees.

Key Takeaways

  • Your electric bill is the cost of kilowatt-hours you used that month, multiplied by your utility's rate per kWh.
  • Rates per kWh vary by state and utility company, so the same usage costs different amounts in different places.
  • Your meter measures consumption automatically; the utility reads it once a month to calculate your bill.
  • Bills include the base energy charge plus taxes, delivery fees, and sometimes seasonal adjustments that vary month to month.
  • Comparing your kWh usage month to month tells you whether you are using more or less, separate from rate changes.

How your utility calculates the bill amount

Your bill starts with the kilowatt-hours shown on your meter. The utility subtracts the previous month's reading from the current month's reading to get your usage. They then multiply that number by the rate per kWh for your area and customer type (residential rates differ from business rates, for example).

After the base energy charge, most bills add a delivery fee — the cost to maintain the poles, wires, and infrastructure that bring electricity to your home. This fee is often a flat monthly amount or a small per-kWh charge. Then come taxes, which vary by state and municipality. Some areas also add seasonal adjustments or demand charges if you use a lot of power at peak times.

This is why two households using the same number of kWh can have different bills. One might pay 14 cents per kWh while the other pays 16 cents, or one might have a higher delivery fee. The bill always breaks down these pieces so you can see what each part costs.

Why your electric bill changes month to month

The most obvious reason is usage. In summer, air conditioning drives consumption up. In winter, heating does the same. A household with electric heat will see much higher bills in January than in June. Even within a season, a hot spell or cold snap can spike usage noticeably.

The second reason is rate changes. Utilities adjust rates periodically — sometimes annually, sometimes more often — and these changes appear on your bill. A rate increase of one cent per kWh might not sound like much, but on 800 kWh it adds eight dollars to your bill. Your bill statement should note when a rate change takes effect.

The third reason is billing period length. Most utilities bill monthly, but the exact number of days between readings varies slightly. A 31-day period will usually show higher usage than a 28-day period, even if your daily consumption stayed the same. This is normal and expected.

How to read the usage section of your bill

Look for a section labeled "Usage" or "Consumption" that shows three numbers: the previous meter reading, the current meter reading, and the kWh used. Subtract the first from the second and you get the third — this is your consumption for the month. If the math does not match, contact your utility to report a possible meter error.

Next to usage, you will see the rate per kWh and the total energy charge. Multiply usage by rate yourself to verify the math. Then look for additional charges: delivery fees, taxes, and any adjustments. Add all charges together and you get the total amount due.

Many utilities now offer online portals where you can see daily or hourly usage instead of waiting for the monthly bill. This helps you spot patterns — for example, noticing that your usage spikes on certain days or times. If you have a smart meter, you may be able to see this breakdown in real time through an app.

What affects how much electricity you use

Heating and cooling are the biggest consumers in most homes. A house with electric heat or air conditioning will use far more kWh than one with gas heat or no AC. Water heaters, especially electric ones, are the second-largest load. Then come appliances: refrigerators, ovens, washers, and dryers all add up, though refrigerators run constantly while ovens and dryers run only during use.

Lighting matters less than it did before LED bulbs became standard. An old incandescent bulb used 60 watts; an LED doing the same job uses 8 to 10 watts. If you have older lighting throughout your home, switching to LEDs will noticeably lower your bill over time.

Phantom loads — devices drawing power even when off or in standby — add up across a whole house. A TV in standby mode uses only a few watts, but if you have ten devices doing this, it becomes measurable. Unplugging chargers and turning off power strips when not in use reduces this waste.

Understanding tiered and time-of-use rates

Some utilities charge different rates depending on how much you use. Under a tiered system, your first 500 kWh might cost 12 cents per kWh, and anything above that costs 15 cents per kWh. This encourages conservation because using less keeps you in the cheaper tier. Your bill will show which kWh fall into which tier.

Time-of-use rates charge different amounts depending on when you use electricity. Peak hours — usually late afternoon and early evening — cost more. Off-peak hours — usually late night and early morning — cost less. If your utility offers this rate, you can lower your bill by running large appliances like dishwashers and laundry during off-peak times.

Not all utilities offer these options, and not all customers are required to use them. Ask your utility whether tiered or time-of-use rates are available in your area and whether switching would lower your bill based on your usage pattern.

Comparing your electric bill to others

Comparing your bill to a neighbor's is usually not useful because rates, usage, and home size differ. A better comparison is your own bill month to month or year to year. If your January bill is always higher than your July bill, that is normal. If your January bill this year is higher than last January, you are using more electricity — either because of a rate increase, colder weather, or changed habits.

The most useful number to track is kWh used, not dollars spent. Two months with the same kWh but different costs means the rate changed. Two months with different kWh but similar costs means you used less but rates went up. Separating these two factors helps you understand whether your consumption is actually changing or whether you are just seeing rate increases.

If your usage seems unusually high, check for obvious causes first: a broken refrigerator seal, a water heater set too high, or an air conditioner running constantly. If you cannot find a reason, contact your utility to request a meter check. Meters fail rarely, but it happens.

Frequently Asked Questions

Why is my electric bill higher in summer than winter?

If you have air conditioning, summer cooling uses more energy than winter heating in most climates. If you have electric heat, winter bills are higher. The season with the most heating or cooling demand will have the highest bill. Usage patterns vary by region and home type.

What does "demand charge" mean on my bill?

A demand charge is based on the highest amount of power you used at any single moment during the month, not total usage. If you run your oven, dryer, and AC all at once, that spike counts. Demand charges are more common on business accounts but appear on some residential bills in certain areas.

Can I reduce my electric bill by unplugging things?

Yes, but the savings are usually small unless you unplug many devices. Turning off lights, using LED bulbs, and adjusting your thermostat have much larger effects. Unplugging chargers and devices in standby mode saves a few dollars per year, not per month.

How do I know if my meter is broken?

Request a meter test from your utility if your bill spikes suddenly with no change in usage, or if the kWh reading seems wrong compared to your habits. Most utilities test meters for free. Meter failure is uncommon, but if it happens, the utility will adjust your bill back to normal usage patterns.

What is the difference between kWh and kW?

kW (kilowatt) is power — the rate at which a device uses electricity right now. kWh (kilowatt-hour) is energy — the total amount used over time. A 1 kW device running for one hour uses 1 kWh. Your bill charges for kWh, not kW.