How to Read Your Electricity Bill (And Spot If You're Overpaying)

Most people look at their electricity bill, find the total, and pay it. Maybe they wince at the number. Maybe they mean to look into it later. But the bill itself contains most of the information you'd need to work out whether you're overpaying — if you know where to look.

Here's a plain-English guide to what's actually on your electricity bill, what the key numbers mean, and the five things worth checking before you decide whether to switch.

The Basics: What Every Bill Has

Supply charge — also called the "service to property charge" or "daily supply charge." This is a fixed daily fee you pay regardless of how much electricity you use. Think of it as the cost of being connected to the grid. It varies by distribution network (the poles-and-wires company that services your area) but is typically somewhere between $0.80 and $1.20 per day. Over a year, that's $290–$440 before you've used a single kilowatt-hour.

Usage charge — the variable component, measured in cents per kilowatt-hour (c/kWh). This is what you pay based on how much electricity you actually consume. Your total usage charge is your tariff rate multiplied by your kWh usage for the period.

GST — 10% added to the total. Standard for energy bills in Australia.

NMI (National Metering Identifier) — a unique number identifying your property's electricity connection point. You'll need this if you switch retailers. It's usually on the first page of your bill, near your address.

Comparison period — most bills show your usage for the current period alongside the same period last year, so you can see whether consumption has changed.

Tariff Types: What You're Actually Being Charged

Not all electricity plans charge the same way. The tariff type determines how your usage charge is structured.

Flat rate (single rate) — one price per kWh, regardless of when you use it. Simple to understand, but rarely the most efficient if you have flexibility over when you run appliances.

Time-of-use (TOU) — different rates depending on when you use electricity. Typically: peak rates during business hours on weekdays (often 7am–11pm), off-peak rates overnight and on weekends, and sometimes a "shoulder" rate in between. If you can shift high-draw appliances — dishwasher, washing machine, charging an EV — to off-peak hours, TOU can be cheaper. If your usage is concentrated during peak hours, it might cost more.

Controlled load — a separate, cheaper tariff for specific high-draw appliances (usually hot water systems or pool pumps) that run on a separate circuit and are switched on by your distributor during off-peak hours. If you have a controlled load circuit, this will appear as a separate line on your bill with its own rate — often significantly cheaper than your main usage rate. Many households don't realise they have this.

Solar feed-in tariff (FiT) — if you have rooftop solar panels, any electricity you export to the grid earns a feed-in tariff, shown as a credit on your bill. Feed-in rates have fallen sharply over the last few years. Many households are now earning 5–8 cents per kWh for their exported solar while paying 30–40 cents per kWh to import electricity. The new Solar Sharer tariff (mandatory for retailers from 1 July 2026) is specifically designed to address this mismatch for households who use a lot of electricity during the day.

Rates cited are indicative averages for illustration. Verify your specific rates on your bill or via the AER's Price Fact Sheet for your plan.

The Better Offer Box

Since the AER introduced the Better Bills Guideline, retailers are required to include a "better offer" notification on your bill if they have a plan that would be cheaper for your usage profile.

This sounds useful — and it is, with one important caveat. The comparison is only between plans offered by your current retailer. A "better offer" from your existing retailer might still be significantly more expensive than the best plan available from another retailer in the market. "You're already on our best offer" means you're on the cheapest plan from that retailer — not the cheapest plan available.

If your bill includes a "better offer" with a meaningful dollar saving, it's worth switching to it. Then it's worth checking whether the whole-of-market picture looks even better.

The Discount Trap

Many electricity plans advertise discounts — but not all discounts are created equal.

Conditional discounts apply only when you meet specific conditions, most commonly: paying by the due date, paying by direct debit, or receiving bills electronically. Miss the condition — even once — and the discount disappears, often without any warning. Your effective rate jumps, sometimes significantly.

Unconditional discounts apply regardless of how you pay or when. These are rarer and generally more reliable.

The question to ask: is the rate advertised on your plan the rate after the discount or before it? Many plans advertise the discounted rate prominently and bury the undiscounted rate in the fine print. If you ever miss a payment, the undiscounted rate is what you'll be charged.

The AER's Price Fact Sheet — which retailers are required to publish for every plan — shows both the discounted and undiscounted rate. If you can't find your plan's Price Fact Sheet, the AER's Energy Made Easy website (energymadeeasy.gov.au) has them.

Five Things to Check on Your Next Bill

Here's a practical checklist. Pull out your most recent bill and work through these:

1. What's your usage rate per kWh? Look for your tariff breakdown — on a flat rate plan, this will be a single number. In NSW, typical market rates range roughly 28–38 c/kWh depending on distributor area and plan type. If you're paying above the top of that range, that's worth investigating. Rates vary significantly by state — use the AER's Energy Made Easy as your reference for what's available in your area.

2. What's your daily supply charge? Find the "daily supply charge" or "service to property" line. If it's above $1.20/day, check whether alternative retailers in your network area offer lower supply charges — these vary more than people expect.

3. Are you on a flat rate but using most power during business hours? If your household is occupied during the day (work from home, retired, kids at home), check whether a time-of-use tariff might actually cost you more — or whether your usage pattern would benefit from shifting consumption to off-peak hours.

4. If you have solar: what's your feed-in tariff? Find the solar credit on your bill and calculate your effective FiT rate (credit amount ÷ kWh exported). If it's below 6c/kWh, check whether a Solar Sharer plan would suit you — retailers must now offer this tariff from 1 July 2026.

5. Does the Better Offer box show a saving? If yes, work out whether that saving would be worth more through a whole-of-market comparison. Use Energy Made Easy or our lazy-tax check to see what the broader market looks like for a household with your usage.

Use Your Bill as a Starting Point

Your electricity bill is more informative than it looks. Once you know where the numbers live and what they mean, it takes about five minutes to read — and those five minutes can tell you whether it's worth spending another twenty comparing what else is out there.

The comparison itself doesn't have to be complicated. We've built a quick check specifically for this: enter your postcode, usage, and whether you've switched recently, and we'll give you an estimated figure for what the market has available for a household like yours.

Run your lazy-tax check to see what the market looks like for you →

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NeverPayMore is a pre-launch beta. Savings figures are estimates based on publicly available data, not personal financial advice. Tariff rates cited are indicative averages — verify with your retailer or the AER's Price Fact Sheet for your specific plan.