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THE BILL BASICS

How to Read Your Electric Bill: Charges & kWh

BillMellow editorial · Updated October 25, 2026

A bill can combine energy, delivery, fixed charges, adjustments and taxes. Your headline price per kilowatt-hour may cover only part of it.

Start with the billing period

Find the dates and the number of days on your bill. A longer billing period can increase the total even when your daily habits stay the same.

Find usage, then find your plan

Usage is normally shown in kilowatt-hours (kWh). Look for your tariff name and separate supply and delivery charges. In some markets these come from different companies.

Average cost and extra-use cost differ

Dividing total dollars by kWh gives an average cost for that bill, including fixed charges. It is useful for reviewing a bill, but it may overstate the cost of one additional appliance. For an appliance estimate, use the applicable variable energy and delivery charges. Tiered and time-of-use plans need more detailed inputs.

Source: EIA: average prices versus utility rates

Read your bill in five steps

  1. Check the service period. Note both meter dates and the number of billed days. A 35-day bill covers more time than a 28-day bill.
  2. Find electricity consumption. Look for kWh, not the amount due. Check whether the meter reading is actual or estimated.
  3. Separate variable charges. Identify usage-based supply and delivery charges. Some providers combine them; others bill the supplier separately.
  4. List fees and adjustments. Include flat customer charges, taxes and credits once. A previous balance or late fee is different from the cost of this period’s electricity.
  5. Compare like with like. Use current-period charges on both bills. Net-metering exports, budget billing and credit balances may need a separate explanation from your utility.

Why did my electric bill go up?

Start with kWh per day: divide each bill’s kWh by its billing days. A higher total can come from a longer billing period even when your daily routine stays similar. Changes in heating, cooling, occupancy or appliance use are possible explanations to investigate; the calculator does not establish a cause.

Next compare average variable cost: supply plus usage-based delivery, divided by kWh. A higher average may reflect different tiers, peak-hour use or adjustments. It does not prove that your provider raised its tariff. Finally, compare fixed charges, taxes and credits.

Worked bill comparison

In our illustrative example, the previous bill is $126 for 700 kWh over 30 days. The current bill is $153 for 850 kWh over 31 days. Daily use rises from 23.3 to 27.4 kWh. The $27 increase splits into $23.25 associated with total usage, $7.75 associated with average variable cost and a $4 reduction in other charges. The usage component includes the longer billing period.

Compare your own electric bills. Enter credits as positive amounts; the tool subtracts them. With zero kWh, totals still work, but a per-kWh rate and a usage/rate split are unavailable.

Keep exploring

Compare rates, monthly fees and bill credits before switching plans.

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