Why Is My Electric Bill So High?

Compare Days, Not Months

Before you look at anything else, find the service period on the bill — the two dates the charges cover — and count the days. Then count the days on the bill before it. Utility billing cycles are not calendar months. They run from one meter read to the next, and a read can slip by several days because of a weekend, a holiday, a route change, or weather that kept a meter reader off the street. A 34-day cycle following a 27-day cycle contains 26 percent more consumption at identical habits.

This is the commonest reason a bill jumps and the one almost nobody suspects, because the mind compares “June” with “July” rather than “27 days” with “34 days”. It is also the easiest to test. Divide the kilowatt-hours on each bill by the number of days that bill covers, and compare the two daily averages. If the daily average barely moved and only the total rose, nothing in your house changed. The bill simply covered more of your life.

Most bills print the read dates, the day count, and a bar chart of the last 12 or 13 periods. Read that chart as kilowatt-hours per day rather than per bill; if your utility prints only totals, do the division yourself before you start unplugging things. A line-by-line walkthrough of an electric bill shows where those dates usually sit.

Was the Meter Actually Read?

The second question is whether the reading is real. Utilities that still send a human to the meter, or that have a meter behind a locked gate or a dog, will sometimes issue an estimated read — a bill calculated from your usage history rather than from the dial. Estimates are usually marked on the bill with a code such as E or EST beside the reading, against A or ACT for an actual read. The legend explaining those codes is normally on the back or in the fine print.

An estimate is not a problem by itself. The problem is the correction. If two or three consecutive estimates run below your real consumption, the next actual read captures everything the estimates missed, and it all lands in one billing period. The bill looks catastrophic; the usage behind it was spread over three months. This is called a true-up, and it is the second most common explanation for a bill that seems impossible.

Check the read type on the last three or four bills, not just the high one. A run of estimates followed by an actual read is a clean diagnosis. The total you owe is generally correct — you did use the electricity — but you can usually ask for the catch-up amount to be spread over several months, and you should fix whatever prevented the reads. Many utilities accept a customer-submitted photograph of the meter face.

Did the Price Change Under You?

Usage and price are different variables, and a bill can rise on price alone. Work out what you actually paid per kilowatt-hour on each of the two bills: divide the total amount by the kilowatt-hours used. That blended figure includes fixed charges, so it is not the tariff rate, but comparing it across two bills tells you instantly whether the price moved or the consumption did.

Prices move for several distinct reasons. In states with retail choice, a promotional supply contract expires and the account rolls onto a variable month-to-month rate that is frequently much higher — the introductory price was the point of the offer, and it ended quietly on a date printed in a contract summary you probably filed away. In regulated states, a rate case or a fuel-cost adjustment changes the tariff on a set date. Everywhere, seasonal rates can step up for the summer months.

Some context for what “high” means: the US residential average was 18.44 cents per kilowatt-hour in May 2026, and the national residential price rose 6.2 percent between May 2025 and May 2026, according to the EIA. A rise of that order is the market. A jump of 40 percent in your blended rate is a contract or a tariff event, and it has a cause you can name. If you are unsure which half of the bill moved, supply and delivery charges explains what each side pays for.

Weather, Measured in Degree Days

“It was hot” is not a diagnosis, because it does not tell you how much hotter, for how long. The measure that does is the degree day. A cooling degree day counts each degree the day's average temperature sits above a reference point, conventionally 65°F; a heating degree day counts each degree below it. A day averaging 85°F contributes 20 cooling degree days. A day averaging 45°F contributes 20 heating degree days. Sum them across the billing period and you have a single number describing how hard the weather pushed on your heating and cooling.

This matters because for a home with central air conditioning or electric heat, consumption tracks degree days closely — close to proportionally, once you are past the base load that runs regardless. A billing period with 30 percent more cooling degree days than the same period last year should produce roughly 30 percent more cooling energy, and cooling is often the largest single item on a summer bill.

Many utilities print degree days for the current and prior-year period directly on the bill, precisely because it answers this question. If yours does not, national weather services publish degree-day totals by station and month at no cost. Compare this period against the same period a year ago rather than against last month; comparing July with May tells you only that seasons exist. If the degree days explain the increase, the equipment is behaving normally and the answer is insulation, thermostat setpoints, and shading, not a fault.

Something New Is Drawing Power

If the days, the read type, the price and the weather are all steady, something in the house is new. The arithmetic here is unforgiving, and it is worth doing rather than guessing. A portable space heater draws about 1,500 watts — 1.5 kilowatts — whenever its element is on. Run it eight hours a day for 30 days and it consumes 360 kilowatt-hours. At the national average price that is roughly 66 dollars in a month, from one appliance that cost 40 dollars. For scale, the average US household uses about 863 kilowatt-hours a month in total, so a single heater on that duty cycle can add over 40 percent to a typical bill.

Other loads that arrive quietly and change a bill by a visible amount:

• An electric vehicle. Home charging is usually the largest new load a household ever adds. Efficiency commonly runs 3 to 4 miles per kilowatt-hour, so 1,000 miles of driving a month is roughly 250 to 330 kilowatt-hours of charging.
• A second refrigerator or freezer in the garage. It is old, that is why it is in the garage, and it is fighting an uninsulated space in summer. Older units run considerably worse than their nameplate suggests.
• A hot tub or heated pool. These maintain temperature continuously, so they add load every day of the month rather than on demand.
• A dehumidifier, a well pump, a grow light, a gaming or mining rig, a new home office. Anything that runs for many hours matters more than anything with a large nameplate that runs for minutes.

Watts times hours is the whole of it. The appliance energy cost calculator will price a specific device against your own rate before you go hunting further.

Something Old Is Failing, or Someone New Is Home

Appliances rarely fail by stopping. They fail by running constantly, which costs money silently for months. The pattern to look for is a machine that used to cycle and now does not.

• A refrigerator with a perished door seal or a dying compressor runs almost continuously and its exterior sides feel warm. The dollar-bill test works: close the door on a note; if it slides out with no resistance, the gasket is gone.
• A heat pump stuck on auxiliary heat. This is the expensive one. Backup resistance strips produce heat at roughly a third of the efficiency of the compressor, so a failed defrost board or a badly set thermostat can multiply a winter heating bill. If the thermostat shows “aux” or “emergency heat” in mild weather, call a technician.
• A well pump or sump pump short-cycling, a pool pump whose timer has failed to off, an attic fan running in January, a hot-water recirculation loop with a dead timer.
• An electric water heater with a failed lower element or a leaking tank — it will heat water it then loses.

Occupancy is the other quiet variable. A household where someone starts working from home runs the thermostat, the lights and the kettle for eight hours that used to be empty. A student home for the summer, a new baby and the laundry that comes with one, a relative moving in, a tenant downstairs — each changes consumption permanently and none announces itself. If the increase began in a specific month and has held since, look at what changed in the household that month.

Meter Errors Are Real but Rare — and What to Do Next

Check this last, not first. Meters that drift usually drift slow, because mechanical wear reduces registration rather than inflating it, and modern solid-state meters have no moving parts to wear. That does not make errors impossible, and two kinds are worth ruling out because they are cheap to check. First, compare the meter number printed on your bill with the number on the meter serving your property. In duplexes, converted houses, apartment blocks and any building where a second meter was added later, accounts do occasionally get crossed. Second, look for something on your meter that should not be: a detached garage, a well serving a neighbour, an outbuilding, or a shared corridor circuit.

If both check out and the usage still has no explanation, you can request a meter test. Most utilities will do it, and most will charge a fee if the meter proves accurate and waive it if it does not. Ask what the fee is before you agree.

Once you have found the cause, the action follows from it. A long billing period needs nothing. A true-up after estimates warrants a request to spread the balance. An expired promotional contract means shopping the supply rate again and diarising the next expiry date. Weather means insulation, setpoints and shading. A new load means deciding whether you want it at that price. A failing appliance means a repair that pays for itself quickly. And if the bill is simply larger than your month can absorb, ask about a payment arrangement or about budget billing, which spreads the same annual cost evenly — it will not reduce what you owe, but it makes it predictable.

Frequently asked questions