How to Read Your Electricity Bill (and Stop Overpaying)

The average Australian household electricity bill runs to around $1,500–$2,200 per year, yet most people can't explain more than half the charges on it. Understanding your bill is the single fastest way to cut your energy costs — before you touch a solar panel or change a light globe.

The Two Charges That Make Up Almost Everything

Australian electricity bills are built on two fundamental charges:

• Supply charge (daily charge): A fixed daily fee — typically $0.80–$1.30/day — just for being connected to the grid. It doesn't matter how much power you use; this charge runs every day of the year.
• Usage charge (consumption rate): A per-kilowatt-hour (kWh) rate applied to every unit of electricity you consume. In South Australia this currently sits around $0.38–$0.47/kWh — one of the highest in the world.

Together, supply and usage charges typically account for 85–90% of your total bill before GST.

Peak, Off-Peak, and Shoulder Rates

If you're on a Time of Use (TOU) tariff, your usage rate changes depending on the time of day:

• Peak: Weekday afternoons/evenings (usually 3 pm–9 pm). Rates can reach $0.50–$0.60/kWh.
• Off-peak: Overnight and weekends. Can be as low as $0.18/kWh.
• Shoulder: The middle ground, often mornings and Saturday daytimes.

If you have solar and/or a battery, a TOU tariff can dramatically cut your bills — you charge batteries overnight at low rates and avoid the peak window entirely.

Feed-In Tariff (FiT) — What You're Paid for Surplus Solar

If you have solar panels, any excess power you export to the grid earns a feed-in tariff credit. In South Australia, retailer FiTs currently range from $0.05 to $0.12/kWh — far less than the $0.44/kWh you pay to import. This is why self-consumption (using your own solar power) is far more valuable than exporting.

Network Charges and Environmental Levies

Buried in most bills are:

• Network (distribution) charges: Paid to the poles-and-wires company for getting electricity to your home. These are bundled into your retailer's rate.
• AEMC/market fees: Small regulatory charges.
• Renewable energy charges: Your share of the national Renewable Energy Target and state schemes.

How to Compare Retailers in 5 Minutes

South Australian residents can use the Energy Made Easy government comparison website (energymadeeasy.gov.au) to compare every accredited offer in your postcode. When comparing:

1. Enter your actual annual kWh consumption (found on your current bill)
2. Select your tariff type (flat rate or TOU)
3. Filter by "no exit fees" if you want flexibility
4. Check the estimated annual cost — not just the per-kWh rate

Switching retailers is free and takes about 10 minutes online. You don't need to contact your current retailer; the new one handles it.

Smart Meters and What They Change

If you have a smart meter (installed with solar, or requested from your retailer), you can access 30-minute interval data through your retailer's app or portal. This lets you see exactly when you're consuming power and whether you're genuinely benefiting from your current tariff structure.