Why Did My Electric Bill Double? — April 2026

The six causes, in checking order

1. The season changed on you

The biggest month-over-month swings are seasonal: electric heat in the first cold month, air conditioning in the first hot one. Resistance heating draws a lot of watts for a lot of hours — a 1,500 W space heater running 8 hours a day adds ≈$59.54 a month at the U.S. median state price of 16.54¢/kWh (EIA, April 2026; typical DOE wattage), and that is one room. In summer, central AC at 3,500 W for 6 hours a day runs ≈$104.20 a month at the same median price. Compare this month's kWh to the same month last year, not to last month — a normal seasonal swing looks like a doubling if you compare October to December.

2. A new large load moved in

One new appliance can carry a whole bill jump: a Level 2 EV charger at 7,200 W for 3 hours a day adds ≈$107.18 a month at the U.S. median state price; a hot tub ≈$44.66. Think back over the billing period: a new vehicle, a tub, a server, a grow light, a failing appliance running constantly (a water heater with a broken thermostat, a heat pump stuck on auxiliary heat). The cost-to-run guides price each suspect at your own state's rate.

3. An estimated meter read caught up with reality

Utilities sometimes bill on an estimated read — no meter access, bad weather, a meter transition. The estimate is often low; when the next actual read arrives, the gap lands on a single bill and you pay for the electricity the estimate missed all at once. The tell: the doubled month follows one or more suspiciously cheap ones. Check the read type printed on each bill (utilities mark estimated vs actual reads) and compare the read on the bill to the number on the meter itself.

4. A fixed-rate plan expired onto a variable rate

In states with retail supplier choice, the fixed or promotional term on a supply contract eventually ends — and the plan rolls onto a variable or default rate that can sit far above what you signed. Statewide averages barely move when this happens, because it is your contract, not the market. Check the supply section of the bill for the supplier name, the rate, and the contract end date. Whether supplier switching exists where you live, and what the average price there is, is on your state's page: find your state.

5. A rate increase landed

Utility rates do not drift — they step, on approval and effective dates, and the first full bill after the step shows the whole jump at once. One family of increases is visible years in advance: in the PJM grid region, capacity prices for the next delivery years have already cleared at auction:

• 2026/2027 (Jun 2026 - May 2027): $329.17/MW-day — source · 2025-07-22
• 2027/2028 (Jun 2027 - May 2028): $333.44/MW-day — source · 2025-12-17
• 2028/2029 (Jun 2028 - May 2029): $325.00/MW-day — source · 2026-07-14

Average-price moves of the size actually observed in any U.S. jurisdiction (the steepest in April 2026 EIA data: +19.4%) do not double a bill on their own — they stack on the causes above. What the capacity charge is and how an auction price becomes cents per kWh is in our capacity charge explainer.

6. A longer billing cycle

Billing cycles are not all the same length — the service-period dates on two consecutive bills rarely cover identical spans. A longer cycle adds days of usage on its own; a longer cycle that also spans a cold snap or heat wave compounds. Before comparing two totals, compare the number of days each covers — the fair comparison is dollars per day.

Rule the price side in or out

Enter your state and the doubled bill: the calculator shows how far you are from your state's average — a bill far above average points at usage or billing mechanics, not the rate — and which price increases are already locked in. Nothing you type is stored.

Keep going

• Why is my electric bill so high? — the full usage-vs-price diagnosis, with the national numbers.
• The PJM capacity charge, explained — the auction that fixes part of your future bill years ahead.