The average Australian household pays $1,500–$2,500 per year in electricity costs — but most people have no idea how that figure is calculated, whether they're on the best tariff, or which appliances are eating the most power. This guide explains every line on your electricity bill, what kWh actually means, and the 10 most effective ways to reduce your costs.
Try it: Use our Electricity Cost Calculator to estimate the running cost of any appliance and see how much you could save by switching your habits or tariff.
The Anatomy of an Australian Electricity Bill
Australian electricity bills can look confusing at first glance, but they all contain the same core components:
1. Supply Charge (Daily Service Fee)
The supply charge is a fixed daily fee simply for being connected to the electricity network — you pay it regardless of how much electricity you use. Rates vary by state and retailer but typically range from $0.80 to $1.50 per day (roughly $292–$548 per year). This is often called the "network access charge" or "metering charge."
2. Usage Charges
This is the variable component — you pay per kilowatt-hour (kWh) of electricity consumed. Standard usage rates in Australia range from approximately 25–45 cents per kWh depending on your state and retailer, with significant variation:
| State | Approximate Flat Rate (cents/kWh) | Average Household Annual Bill |
|---|---|---|
| NSW | 28–38c | ~$1,800–$2,200 |
| VIC | 26–36c | ~$1,600–$2,000 |
| QLD | 27–35c | ~$1,700–$2,100 |
| SA | 38–48c | ~$2,100–$2,800 |
| WA | 28–32c (Synergy) | ~$1,500–$1,900 |
| TAS | 28–34c | ~$1,800–$2,300 |
South Australia consistently has the highest electricity rates in the country, driven by its high proportion of renewables combined with an older, less efficient grid infrastructure.
3. GST
Goods and Services Tax of 10% is applied to the total of supply charges and usage charges. It should always be clearly itemised on your bill. If you run a business, the GST component may be claimable.
4. Solar Feed-in Credits (if applicable)
If you have a rooftop solar system, excess electricity exported to the grid earns you a credit at the feed-in tariff rate — currently approximately 5–12 cents per kWh depending on your retailer and state. This is deducted from your total bill.
What Is a Kilowatt-Hour?
A kilowatt-hour (kWh) is the unit of electrical energy used to measure your consumption. One kWh is the amount of electricity used by a 1,000-watt appliance running for one hour.
kWh = Wattage (W) ÷ 1,000 × Hours Used- Wattage = power rating of the appliance (found on the device label or manual)
- Hours = hours of operation
- Then multiply by your tariff rate to get the cost: Cost = kWh × cents per kWh
Example: Running a 2,400W electric oven for 1.5 hours
- kWh used = 2,400 ÷ 1,000 × 1.5 = 3.6 kWh
- At 32c/kWh: 3.6 × $0.32 = $1.15 per use
- If used 5 times per week: $1.15 × 5 × 52 = $299/year
Peak vs. Off-Peak vs. Shoulder Rates
If you have a smart meter (which most homes installed since 2010 have), you may be on a Time-of-Use (TOU) tariff rather than a flat rate. Under TOU pricing:
- Peak: Highest rate (often 45–65c/kWh), typically 3–9pm on weekdays when demand is highest
- Shoulder: Mid-range rate, typically mornings and evenings outside peak hours
- Off-peak: Lowest rate (often 18–28c/kWh), typically overnight and on weekends
Whether TOU tariffs save or cost you more depends entirely on your lifestyle. If you work from home (using appliances during peak hours), TOU can be more expensive. If you can shift dishwasher, washing machine, and EV charging to off-peak hours, TOU can save 15–25% on electricity costs.
| Task | Optimal Time (TOU) | Why |
|---|---|---|
| Run dishwasher | 11pm–7am | Off-peak — deepest discount |
| Wash and dry clothes | 9am–3pm or overnight | Off-peak or shoulder |
| Charge EV | Overnight (11pm–7am) | Off-peak — maximise savings |
| Pre-cool/pre-heat home | Before 3pm | Avoid peak hours |
| Cook dinner | Before 5pm if possible | Avoid 5–9pm peak window |
The Most Expensive Appliances in Your Home
Not all appliances are equal. Here are the top energy consumers in a typical Australian home, ranked by annual running cost estimate (based on average usage patterns and 32c/kWh):
| Appliance | Typical Wattage | Est. Annual Usage | Est. Annual Cost |
|---|---|---|---|
| Air conditioner (ducted) | 3,500–6,000W | 800–1,200 hrs | $896–$2,304 |
| Pool pump | 750–1,500W | 1,500 hrs | $360–$720 |
| Electric hot water system | 2,400–3,600W | 1,100 hrs | $845–$1,267 |
| Clothes dryer | 1,800–3,000W | 200 hrs | $115–$192 |
| Refrigerator (large) | 150–400W | 8,760 hrs (always on) | $420–$1,120 |
| Electric oven | 2,000–3,000W | 300 hrs | $192–$288 |
| Television (large screen) | 100–300W | 1,500 hrs | $48–$144 |
| Laptop computer | 30–80W | 2,000 hrs | $19–$51 |
10 Ways to Reduce Your Electricity Bill
- Compare and switch retailers: Energy Made Easy (energymadeeasy.gov.au) and Victorian Energy Compare allow direct comparison. Switching retailers can save $200–$500 per year with no change to your behaviour.
- Upgrade to a heat pump hot water system: Heat pumps use 60–75% less electricity than conventional electric hot water. Payback period is typically 3–5 years.
- Add insulation: Ceiling insulation (approximately $1,500–$3,000 installed) can reduce heating and cooling energy use by 40–50%. Government rebates often apply.
- Set your air conditioner to 24°C in summer, 20°C in winter: Every degree above 20°C in winter or below 26°C in summer increases heating/cooling energy use by approximately 10%.
- Switch to LED lighting throughout: LED bulbs use 75–80% less energy than incandescent globes and last 15–25 times longer.
- Run pool pump on off-peak: Program your pool pump to run overnight on off-peak electricity — same clean water, much lower cost.
- Cold water washing: Modern detergents work effectively in cold water. Switching from warm to cold washing saves approximately $70–$100 per year.
- Install solar: A 6.6 kW system (typical mid-range) can generate 25–30 kWh per day, potentially reducing your bill by $1,200–$2,000 per year after payback.
- Seal draughts: Door seals, draught stoppers, and weatherstripping cost under $100 and can meaningfully reduce heating loss.
- Use standby power wisely: Standby appliances account for 5–10% of household electricity use. A smart power strip or simply switching off at the power point can save $50–$150 annually.
Solar Savings Potential
Rooftop solar is now cost-effective for most Australian households. A typical 6.6 kW system costs approximately $5,500–$8,000 after the Small-scale Technology Certificate (STC) rebate. At current electricity prices and feed-in tariffs, payback periods are typically 4–7 years, with panels warrantied for 25 years. That means 15–20 years of near-free electricity after payback.
The key to maximising solar benefit is self-consumption — using the electricity you generate rather than exporting it. At 32c/kWh avoided versus 8c/kWh feed-in, electricity you use yourself is worth four times as much as what you export.
Frequently Asked Questions
How do I find my tariff rate?
Your tariff rate should be on your bill under "usage charges" or "electricity charges." It is expressed as cents per kWh. If you can't find it, log in to your retailer's online portal or call their customer service line. You can also find your current plan on Energy Made Easy.
What is the difference between a flat rate and time-of-use tariff?
A flat rate charges the same amount per kWh regardless of when you use electricity. A time-of-use tariff charges different rates depending on the time of day (peak, shoulder, off-peak). If you have flexibility to shift usage to overnight hours, TOU can save money. If your household uses most electricity in the evenings (5–9pm), a flat rate is usually better.
Can I negotiate a better electricity rate?
Yes. Many people don't realise that electricity retailers will often offer a discount or better rate to retain a customer who calls to say they are considering switching. Always call your current retailer before switching — and always have a competing offer ready to quote. The Energy Made Easy comparison website is your negotiating tool.