Your electricity bill, line by line
A power bill looks complicated, but it's built from just a few parts. Learn to read each one and the whole thing becomes far less mysterious — solar or not.
Illustrative only. Bar lengths show how components relate on a typical bill, not actual dollar amounts — those depend entirely on your retailer, plan and usage.
How an Australian electricity bill is built
Almost every power bill in Australia is assembled from the same handful of parts. Once you can recognise them, a bill stops being a single intimidating number and becomes a short list of things you can actually understand and question.
The graphic above is a simplified anatomy of a typical bill. The exact labels differ between retailers, but the underlying components are remarkably consistent.
Supply charges
The supply charge — sometimes called a service or connection charge — is a fixed daily amount you pay simply for being connected to the grid, regardless of how much energy you use. It's charged per day, so it adds up across a billing period whether you're home or away.
Because it's fixed, the supply charge is one reason a bill is rarely zero even in a strong solar month. Reducing usage doesn't reduce this part.
Usage charges
Usage charges are what you pay for the energy you draw from the grid, measured in cents per kilowatt-hour (c/kWh). This is the part most affected by your habits, your appliances, and — for solar households — how much of your own generation you use directly.
Feed-in tariffs
When your solar system produces more than the house is using, the surplus is exported to the grid and you receive a feed-in credit. The rate varies between retailers and plans, and it has generally trended downwards as daytime solar has become abundant.
A common surprise: exporting energy is usually credited at a lower rate than you pay to import it. That's why using your own solar directly — rather than exporting then buying back later — often matters more than the feed-in rate itself.
Peak and off-peak pricing
Many households are on time-of-use plans, where the price per kilowatt-hour changes depending on the time of day. Peak periods — often weekday evenings — cost more, while off-peak periods cost less. Understanding your plan's windows can reshape when it makes sense to run heavy appliances.
- Peak — the most expensive window, usually aligned with high community demand.
- Off-peak — the cheapest window, often overnight.
- Shoulder — an in-between rate some plans include.
Controlled loads
Some homes have a controlled load — a separately metered circuit, often for an electric hot-water system, that runs during off-peak times at a lower rate. It appears as its own line on the bill and is worth identifying, because it behaves differently from your general usage.
Common misunderstandings
- “Solar makes my bill zero.” The fixed supply charge and any peak-time grid use usually remain.
- “A bigger feed-in rate is all that matters.” Using your own energy directly often matters more.
- “My bill should be identical each quarter.” Seasonal generation and usage swings are normal.
- “The headline rate is the whole story.” Supply charges, time-of-use windows and discounts all shape the total.