Why Is My Electric Bill So High? 10 Causes and How to Check Each

An electric bill usually jumps for one of four reasons: you used more kilowatt-hours (most often heating or cooling in extreme weather), the billing period was longer, the price per kWh went up, or the meter wasn't actually read. Your bill shows all four. Compare the kWh, the number of days and the rate with last month and the same month last year, and the cause is usually obvious in ten minutes.

For context, the average US home used 863 kWh a month in 2024 at 16.48¢ per kWh, for an average bill of $142.26 (U.S. Energy Information Administration, Electric Sales, Revenue, and Average Price). That is about 28.4 kWh a day. Your state's numbers are on the average utility bills by state page.

Step 1: Read three numbers off the bill

1. kWh used this period. If it's up, you used more electricity (causes 1–6 below). If it's flat but the bill is higher, the price changed (causes 7–9).
2. Days in the billing period. Divide kWh by days to get use per day, the only fair comparison between bills.
3. The reading type. Look for "estimated", "E" or "est." next to the meter reading. An estimated bill is a guess that gets corrected later.

Example: a 28-day bill for 812 kWh is 29.0 kWh a day. The next bill covers 34 days and 945 kWh. It looks 16% higher, but it's 27.8 kWh a day, slightly less than before. The extra six days explain the whole increase.

Causes that mean you used more

1. Weather. Heating and cooling are the biggest electric loads in most homes. A cold snap or heat wave can raise use sharply even if nothing else changes. Compare with the same month last year, not last month.
2. Electric heat, especially backup heat. Baseboard heaters and the backup heat strips in a heat pump (often labelled "aux" or "emergency heat" on the thermostat) use far more electricity than the heat pump itself. If the thermostat shows aux heat running a lot, have the system checked.
3. A space heater. A typical 1,500-watt plug-in heater uses 1.5 kWh every hour it runs. Eight hours a day for a month is 360 kWh, about $59.33 at the national average rate.
4. More people or more time at home. Guests over the holidays, working from home, or a new household member all add laundry, hot water, cooking and screen time.
5. A new or failing appliance. A second fridge in the garage, a hot tub, a pool pump, an aquarium, or a fridge whose door seal has failed can each add a noticeable amount. An electric water heater with a leaking hot water tap runs constantly.
6. Something left on. A heated garage, an outdoor light on all night, or a well pump that keeps cycling because of a leak. A plug-in energy monitor shows exactly what a single appliance uses.

Causes that mean you paid more per kWh

7. A rate change. Utilities change prices, often in summer or winter, and the supply or fuel charge can move month to month. At 900 kWh, a rise from 15¢ to 18¢ adds $27.00 a month. The bill or the utility's website lists current rates.
8. Tiered or time-of-use pricing. On a tiered plan the price steps up after a set number of kWh. On a time-of-use plan, power used in the late afternoon and evening peak costs more. Running the dryer or charging an electric car in the peak window raises the bill without raising the kWh.
9. The end of a promotional or fixed-rate contract. In states where you can choose a supplier, a fixed rate often rolls onto a higher variable rate when the contract ends. Check the supplier section of the bill.

Causes that are billing errors

10. An estimated reading or catch-up bill. If last month was estimated low, this month's actual reading charges for the difference. Compare the reading on the bill with the number on your meter. If they're far apart, call the utility and ask for a corrected bill. Mistyped account numbers and meters swapped between apartments do happen; a meter that keeps counting with the main breaker off needs a call too.

What to do next

• Work out what this bill should have been with the electric bill calculator (kWh × rate + fixed charge), and what a single appliance costs with the electricity cost calculator.
• If winter or summer bills are hard to budget for, ask the utility about budget billing, which spreads the year's cost into equal monthly payments.
• If you're struggling to pay, ask the utility about payment plans, and look into the federal Low Income Home Energy Assistance Program (LIHEAP) through your state.
• For changes that cut the bill for good, read how to lower your utility bills, which ranks fifteen fixes by what they save.
• Track the bill monthly in your bill tracker with last year's amount noted, so the next jump is spotted the day the bill arrives rather than when it's due.