ELECTRICITY, EXPLAINED

Why is my electric bill so high?

BillMellow editorial · Updated October 25, 2026

A higher electric bill can come from more energy use, a longer billing period, different prices or additional charges. Start by separating those changes. The dollar total alone cannot tell you which one happened.

Start here: compare kWh per day, then usage-based charges per kWh, then fixed fees, taxes and credits. Use the same two bills for every step.

1. Check the billing period before judging usage

A 35-day bill covers more time than a 28-day bill. Compare average daily use: total kWh divided by billing days. For example, 840 kWh over 28 days and 1,050 kWh over 35 days both equal 30 kWh per day. Total usage rose, but the daily pace did not.

Check the meter-reading dates rather than assuming each bill represents a calendar month. A move-in charge, a corrected reading or a catch-up amount may also make two totals difficult to compare. Read the line-item explanation or ask your provider what period an adjustment covers.

2. If daily kWh increased, look for a change in routine

List what changed between the two periods: heating or cooling hours, an additional occupant, time spent at home, or a newly used appliance. These are possibilities to investigate, not a diagnosis. Weather can affect electricity demand, but a bill comparison alone cannot prove which device caused a change.

Use measured appliance energy when available. A nameplate gives operating power, which may not equal average power for equipment that cycles. Multiplying a refrigerator or air conditioner’s rated watts by every elapsed hour can overstate its use.

Learn how to estimate appliance energy use or add your own devices to the calculator. Compare the result with the increase in daily kWh before deciding an appliance explains the whole bill.

3. Separate energy use from average variable cost

Add the supply and delivery charges that depend on usage, then divide by kWh. Keep recurring flat charges separate. Suppose the variable charges were $105 for 700 kWh and $136 for 850 kWh: the effective variable cost changed from $0.15 to $0.16 per kWh.

That difference does not automatically prove the provider raised its stated rate. It can reflect a different mix of time-of-use periods, tiers or adjustments. Compare the current pricing document and your actual usage allocation before naming a cause.

4. Check fixed charges, taxes and credits

A higher total with similar kWh can reflect a new flat fee, a missing credit or a different tax or adjustment. Look for a minimum-usage condition on a credit. If a credit requires 1,000 kWh, a 999-kWh month may have a different result from a 1,000-kWh month.

BillMellow’s electric bill comparison separates usage, average variable cost and the remaining charges. Its change components add back to the total difference. It explains the entered numbers; it does not inspect your meter or identify an equipment fault.

A worked example: $126 to $153

In an illustrative comparison, the previous bill has 700 kWh, $105 in variable charges, $15 in fixed charges and $6 in taxes: $126 total. The current bill has 850 kWh, $136 in variable charges, $15 fixed, $7 in taxes and a $5 credit: $153 total.

The $27 increase splits into $23.25 associated with usage, $7.75 associated with average variable cost and a $4 decrease from fixed charges, taxes and credits combined. The calculation uses midpoint averaging, as explained in our methodology. These amounts are examples, not a US average or a utility quote.

What to have ready when you contact the provider

• Both billing periods, kWh totals and meter-reading details.
• The exact line item that changed and the plan name on the bill.
• The relevant current rate document, credit conditions and any adjustment notice.

Ask the provider to explain the specific difference rather than assuming every increase came from a higher rate. If comparing a new offer, include monthly fees and switching costs in the two-plan cost comparison.

Background on price drivers: US EIA electricity price factors. All worked numbers above are BillMellow illustrations.

Keep exploring

• kW vs. kWh: what is the difference?
• How much does a 1,500-watt space heater cost to run?
• Electricity supply vs. delivery charges

All electricity guides · Calculation methods and data limits