How to Read Your Electric Bill

Start with the account block and the service period

The top of a residential electric bill carries the administrative details, and two of them matter more than they look. The first is the service address and account number — worth checking once a year, because a meter mapped to the wrong unit in a duplex or a small apartment building is not a rare error, and it can persist for years until somebody compares a bill to a floor plan.

The second is the service period: the two dates that bracket the days you are being billed for. This is not the calendar month. A utility reads meters on a route, and your route has its own cycle, so your "August" bill might cover July 19 to August 20. Everything else on the page is measured against those two dates.

You will also see a rate code or rate schedule — something like a residential service designation, sometimes with a suffix for an electric heating or time-differentiated variant. That code determines every price applied further down the bill. If you have changed your household in a significant way, such as adding electric heat or an EV charger, the rate code is the first thing to check, because you may now qualify for a schedule you are not on. Utilities generally do not move you to a cheaper schedule on their own initiative.

The meter reading section: actual reads, estimated reads, and true-ups

Below the account block, most bills show the meter itself: the previous reading, the current reading, a multiplier in some cases, and the difference between the two. The difference is your consumption. Two small letters near those numbers decide whether the bill in your hand is a measurement or a guess.

• Actual read (often marked A) — somebody or something physically read the register. With a smart meter this happens automatically and daily; with an older mechanical meter it means a person walked the route.
• Estimated read (often marked E) — nobody read the meter. The utility modelled your usage from your own history for the same season, and billed you against the model.
• Customer read — you submitted the number yourself, which utilities in some territories will accept between visits.

Estimates are not fraud and they are not permanent. They happen when access is blocked, when a meter fails to report, or when weather stops a route being walked. The important mechanic is the true-up: at the next actual read, the utility knows exactly how much you really used across the whole span, subtracts everything already billed on estimates, and charges you the remainder. If the estimate ran low, the true-up bill is large and it can look like a catastrophic month. It usually is not. It is two or three months of real usage arriving in a single envelope.

The practical response is to check the read type every month rather than only when the total shocks you. A run of consecutive estimates is worth a phone call, because the correction grows with every cycle it is delayed.

kWh used — and why month-to-month comparison misleads

The unit on your bill is the kilowatt-hour (kWh): one kilowatt of demand sustained for one hour. A 100-watt device left on for ten hours consumes one kWh. Every charge that scales with your consumption is calculated from this single figure. For scale, the average US household used about 863 kWh a month in 2024, though the spread between states is enormous and driven mostly by climate and heating fuel.

Here is the comparison trap. Billing periods are not equal in length. A 29-day cycle followed by a 34-day cycle is entirely normal, and a five-day difference is roughly 17% more days in the second period. If your usage per day did not change at all, the second bill still arrives about 17% higher, and nothing has gone wrong.

The fix is to divide. Take kWh used, divide by the number of days in the service period, and you have kWh per day — the only usage figure that compares cleanly across cycles. Do the same for the same month last year, which most bills print as a small bar chart, and you are comparing like with like in similar weather. If daily usage genuinely jumped and the weather did not, the cause is behavioural or mechanical, and our guide to why your electric bill is so high works through the usual suspects in order of likelihood.

The supply section: what you pay for the electricity itself

The supply charge — also printed as generation, energy supply, or basic service — pays for producing the electrons and getting them onto the grid. It is the commodity half of your bill: fuel, the operation of power plants, purchases on the wholesale market, and the contracts your supplier signed to cover its customers' demand.

How it appears depends on where you live. In a regulated state, your utility both generates or procures the power and delivers it, and the supply price is set through a public rate case at the state commission. In a deregulated state, generation has been separated from delivery, and you may buy supply either from a competitive retailer you chose or from the default service the utility procures on behalf of customers who never shopped. Either way, the line looks the same: a per-kWh price multiplied by your consumption.

Read the rate structure carefully rather than the headline number. Supply may be a single flat price per kWh, a tiered price that steps up once you cross a monthly allowance, or a time-differentiated price that varies by hour of the day. Each of those responds to a different behaviour, and a strategy that works under one does nothing under another. If your bill shows peak and off-peak columns, the price you pay depends on the hour you used the power, not just the total.

This section is the part of the bill most open to action, and in a competitive market it is the only part you can shop.

The delivery section: wires, poles, and the fixed cost of being connected

The delivery charge — transmission and distribution, sometimes just "delivery services" — pays the wires company to move electricity from wherever it was generated to your meter, regardless of who generated it. It covers high-voltage transmission lines, substations, the local poles and cables on your street, the meter itself, restoration crews after storms, and the metering and billing systems.

Delivery is a natural monopoly. One set of wires serves your street, building a second set would be absurd, and so the price is set by your state regulator rather than by competition. No supplier can undercut it and no shopping decision changes it. Even in the most competitive retail market in the country, the delivery half of the bill is a regulated pass-through.

Inside delivery you will usually find a fixed customer charge — a flat monthly amount, sometimes called a service charge or basic charge, billed whether you use one kWh or two thousand. It recovers the cost of the connection: the meter, the drop from the pole, the account. Conservation does not reduce it. A vacant apartment still generates a bill.

The distinction between the two halves is the single most misunderstood thing on a utility bill and it deserves its own treatment, which is in our guide to supply versus delivery charges.

Riders, surcharges, adjustment clauses, taxes and franchise fees

Underneath the two main sections sits a stack of smaller lines that most readers skip. They are individually small and collectively not. Typical entries include:

• Fuel or purchased power adjustment — a mechanism that passes changes in fuel and wholesale power costs through to customers between full rate cases, so the price tracks the market rather than a stale forecast.
• Riders — separately approved charges recovering a specific programme: storm restoration, grid modernisation, energy efficiency programmes, low-income assistance, renewable or clean energy mandates, decommissioning.
• Reconciliation or true-up clauses — corrections that return over-collections to customers or recover under-collections from an earlier period.
• Taxes and franchise fees — state and local sales tax where it applies, plus a franchise fee paid to the municipality for the right to run wires through public rights of way. These are typically a percentage of everything above, so they rise and fall with the rest of the bill.

Almost none of this is negotiable. Riders are approved by a regulator through a public process; a call to customer service will not remove them. What is worth knowing is that they exist, that they are charged per kWh in many cases, and that reducing consumption therefore reduces more of the bill than the supply line alone suggests.

The only number worth comparing: your effective all-in rate

Every advertised electricity price quotes one component. The number that describes what you actually pay is the effective all-in rate: the bill total divided by the kWh consumed, expressed in cents per kWh. It absorbs supply, delivery, the customer charge, every rider and the taxes, and it is directly comparable across months, across houses and across offers.

A worked example using the national averages. Take a household that used 863 kWh in a cycle and received a bill for $159.14. Convert the dollars to cents and divide:

• $159.14 = 15,914 cents
• 15,914 ÷ 863 kWh = 18.44 cents per kWh

That is the US residential average as of May 2026 — a figure that rose 6.2% over the preceding year. Now the point of the exercise. Suppose a retailer offers you a supply rate of 9 cents per kWh. Against 18.44 cents it reads as a saving of more than half. It is not, because it replaces only the supply component; delivery, the fixed charge, the riders and the taxes are untouched. Compute your own all-in rate first, then work out what the offer changes and what it leaves alone.

Two habits follow from this. Track your all-in rate and your kWh per day every month, and treat any quoted price as incomplete until you know which lines it replaces. Our kWh cost calculator does the arithmetic, and the average electric bill by state page shows where your all-in rate sits against your neighbours'.

Frequently asked questions