How to read your electricity bill (every line item explained)

Most people look at two numbers on their electricity bill: the total due and the due date. Everything in between is treated as filler.

That filler is where the information is. The usage breakdown isn't just an accounting record. It's a diagnostic. Read correctly, it tells you whether your plan suits your household, whether your tariff structure is costing or saving you money, and whether your rates are still competitive.

This guide walks the whole bill, in the order it appears, and says what each line actually tells you.

Grab your latest bill and read along.

First: which of the two bill types do you have?

Before reading anything else, identify which kind of bill you're holding.

Single-rate (flat rate). One usage rate applies to all consumption regardless of time of day. The usage section shows a single energy charge line: total kWh × rate in c/kWh.

Time-of-use (TOU). Different rates apply depending on when electricity is used. The usage section shows several lines (peak, shoulder, off-peak), each with its own kWh figure and rate. Some TOU bills also carry a controlled load rate for a hot water system on a dedicated circuit.

This distinction matters, because how you interpret the bill and which comparison you should run both differ between the two.

The front page

Amount due and due date. The headline. Worth checking whether it includes a pay-on-time discount that disappears if you're late. If the bill shows two amounts, one if paid by the date and one if not, the gap between them is a conditional discount, and it tells you something about how your plan is priced.

Billing period. The exact dates covered, and the number of days. Bills aren't all the same length: 90 days, 91 days, monthly. When your bill jumps, always check the day count before panicking. Twelve extra days is a 13 per cent bigger bill with nothing else changing.

Your average daily usage. Usually in kWh per day, often compared to the same period last year and sometimes to similar households. This is the single most useful number on the front page. If it's up on last year, the house is using more. If it's flat and the bill is up, the price moved.

Account and meter identifiers

Your NMI (National Metering Identifier). A 10 or 11 digit number identifying your connection point, not you, and not your retailer. It stays with the property when you switch retailers. Comparison and switching processes use it, which is why our upload flow reads it from your bill.

Meter number. Identifies the physical meter, which is different from the NMI. A property can have more than one: a controlled load is often metered separately.

Meter read type. Near the usage detail, the bill states whether the read was actual or estimated, sometimes just as a letter A or E. An estimated read means the retailer guessed from history. If your bill spiked and the read was estimated, that's your first phone call, and you can submit your own read or request an actual one. Two or more estimated reads in a row is worth querying properly; persistent estimation can mask metering issues or cumulative billing errors.

The rates table (this is where the money is)

Daily supply charge. A fixed charge, in cents per day, for being connected to the network. You pay it regardless of usage.

What it tells you: supply charges commonly range from around $0.70 to $1.40 per day for residential customers. The difference between $0.80 and $1.20 is $146 a year, invisible if you only look at the total.

What to do with it: multiply by 365 to get the annual fixed cost of your connection. For low-usage households (apartments, minimal heating and cooling), the supply charge is a high proportion of the bill, and a plan with a lower supply charge matters more than a sharp usage rate.

Usage charges. Cents per kWh for the electricity itself. On a single rate plan this is one line.

What it tells you: whether your plan is priced competitively. Competitive flat-rate plans in most Australian markets sit around 22–30 c/kWh, varying by state and distributor. Default offer rates typically sit above that range.

What to do with it: resist comparing it against the reference price, which is an annual dollar amount at a benchmark usage level rather than a rate. Apply your rate and your supply charge to your own annual usage, and compare that total against the benchmark for your zone. Our guide to whether you're overpaying sets out the zone figures and the arithmetic.

Peak, shoulder and off-peak (TOU bills). Peak typically applies weekday afternoons and evenings, commonly 3pm–9pm or 5pm–9pm, and is the most expensive band, often 35–50+ c/kWh. Off-peak applies overnight and at weekends, typically 10–20 c/kWh. Shoulder sits between.

What to do with it: work out your peak usage as a proportion of total. If more than about 35–40 per cent of your consumption falls in peak, a well-priced flat rate plan may beat your TOU plan, even though the flat rate looks higher than your off-peak rate. The arithmetic depends on your specific split, which is exactly the sort of thing worth running properly rather than eyeballing.

Controlled load. A separate, cheaper rate for a specific appliance, classically the hot water system, metered on its own circuit and energised off-peak. Appears as its own line, sometimes labelled CL1 or CL2, or by an old name like "off-peak hot water". Rates are typically 10–15 c/kWh.

If your bill has a controlled load channel showing zero or near-zero kWh, your hot water may have been switched onto the main tariff circuit. That's a common and expensive misconfiguration, and it's worth a call to your retailer.

Discounts. Shown as a percentage or dollar reduction. Read the fine print for the word "conditional". A guaranteed discount is real money. A pay-on-time discount is a bet the retailer is making about your habits, priced in their favour. Compare this bill's effective rate against the last one. If a conditional discount has quietly lapsed, your effective rate has gone up without the headline rate changing.

Solar feed-in credit. If you export solar, the credit appears here in cents per kWh exported. It reduces the bill; it isn't a payment for being wonderful. Feed-in rates vary between plans, and a high feed-in rate can be paired with high usage rates, so the headline number alone tells you very little. If you have solar and there's no feed-in credit at all, either the system isn't exporting or the credit isn't being applied, and both require a call. Our solar bill guide covers that section in detail.

Concessions and rebates. If you hold a relevant concession, state rebates appear as credits. Retailers are required to apply them once registered; if you're eligible and don't see a line for it, ask.

The comparison boxes

Bills in most states must carry a statement comparing your plan against the regulator's reference price (the Default Market Offer benchmark), phrased as a percentage above or below it. In Victoria, bills also carry a "best offer" box telling you whether the retailer has a cheaper plan for you and how much you'd save.

These boxes exist because regulators forced them to. Read them. They're the closest thing the bill has to an honesty panel, though they only compare within one retailer's own plans, or against a single benchmark, not across the market.

The figures that signal a plan problem

Specific readings worth acting on:

• A usage rate above roughly 32–35 c/kWh with consumption over 3,000 kWh a year. The annual saving from moving to a competitive plan is likely $200 or more.
• A conditional discount that has disappeared between one bill and the next.
• Peak usage above 50 per cent of total on a TOU plan. You may be worse off than on a competitive flat rate.
• Controlled load showing zero kWh. Likely a meter configuration problem.
• Solar installed but no feed-in credit line. Either a fault or a billing error.

Reading the bill versus running the comparison

Reading your bill tells you what's happening now. Running a comparison tells you whether what's happening now is the best available outcome.

The bill tells you the question. The comparison answers it. The bill cannot tell you what the same usage would have cost on the other published plans available in your area, and that arithmetic is exactly what we built. Upload your bill, and our engine reads your usage, tariff and rates, projects them across the available plans on the government's energy register, prices conditional discounts honestly, and ranks by what you'd actually pay over a year. Estimates, not quotes, workings shown.

Related guides

Still puzzled by the rates table? Electricity tariffs explained. Got a gas bill in the same drawer? How to read your gas bill covers megajoules, tiers and the MIRN. And if the question is simply "why is it so high", start at the pillar guide.