7 April 2026
Your electricity bill is confusing. That's not an accident. The more complex a bill looks, the harder it is for you to compare plans, spot overcharges, or switch retailers. Complexity is a feature, not a bug — for them.
Let's break it down so you actually understand what you're paying for.
Every electricity bill has two main components. The supply charge (also called a daily service charge) is a flat fee you pay every day just for being connected to the grid — whether you use any power or not. This is typically 80c to $1.50 per day.
The usage charge is what you pay for the electricity you actually consume, measured in kilowatt-hours (kWh). This is where the real variation happens between plans.
Most people focus on the usage rate when comparing plans, but a low usage rate paired with a high supply charge can cost you more overall. You need to check both.
On a flat rate tariff, you pay the same price per kWh no matter when you use electricity. Simple. On a time-of-use (TOU) tariff, the price changes depending on when you use power — peak, shoulder, and off-peak periods.
TOU can save you money if you shift usage to off-peak hours (running the dishwasher at night, charging your EV after 10pm). But if you're home during peak hours with air conditioning running, TOU can cost significantly more.
The problem? Many people are on TOU tariffs without realising it, and they're not adjusting their behaviour to match. That's money down the drain.
Retailers love advertising "25% off" or "guaranteed discount." But off what? Most discounts are calculated against the retailer's own inflated reference price, not the actual cheapest rate available.
A 25% discount off a high base rate can still leave you paying more than a no-discount plan with a lower base rate. The Australian Energy Regulator (AER) introduced the Reference Price (or Default Market Offer) to make comparisons easier, but many people still get fooled by big discount numbers.
The only number that matters is what you actually pay per kWh and per day — after all discounts are applied.
If you've never actively chosen an electricity plan, or your previous plan expired and you didn't renew, you're probably on a standing offer. This is the default plan your retailer assigns you, and it's almost always the most expensive option.
Market offers are competitively priced plans that retailers actively sell. The difference can be $400 to $800 per year for the same household. That's not a typo.
Checking whether you're on a standing offer takes 30 seconds. Switching off one takes about 10 minutes. The savings last for years.
You shouldn't need a finance degree to understand your electricity bill. Upload your bill to BillDecoder and we'll tell you exactly what you're paying, whether it's fair, and what to do about it — in plain English.
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