If you’ve ever opened your power bill and wondered whether you’re paying too much, you’re not alone. It’s one of the most common questions Perth homeowners ask. The good news? Western Australia actually has some of the lowest electricity costs in the country.
But “low” is relative when you’re staring at a bill that feels too high. So let’s break down what the average Perth household actually pays, what affects those numbers, and how you can trim yours down.
Average Electricity Bill in Perth by Household Size
Your power bill depends heavily on how many people live in your home. More people means more showers, more devices charging, more lights left on, and more laundry cycles.
Here’s what Perth households typically pay based on size:
| Household Size | Average Quarterly Bill | Average Monthly Bill |
| 1 person | $237 | ~$79 |
| 2 people | $311 | ~$104 |
| 3 people | $373 | ~$124 |
| 4 people | $382 | ~$127 |
Source: Synergy average bill data for WA customers, 2025
Worth noting that Synergy bills most customers every two months (bi-monthly), not monthly or quarterly. So if your bill arrives around the $200-$380 mark every couple of months, you’re sitting pretty close to average.
According to a Canstar Blue survey, Western Australians pay roughly $296 per quarter on average. That’s the cheapest of any state or territory in Australia. Tasmania tops the list at $372, with NSW and South Australia not far behind.
Current Synergy Electricity Rates (2025)
The WA Government sets electricity prices each year, and they apply whether you’re with Synergy or Horizon Power. As of 1 July 2025, here’s what you’re paying on the standard Home Plan (A1) tariff:
| Charge Type | Rate |
| Daily supply charge | $1.1605 per day |
| Electricity usage | 32.3719 cents per kWh (unit) |
So your bill has two parts. The supply charge is a fixed daily fee just for being connected to the grid. It works out to about $34.82 per month regardless of how much power you use. Then you pay for every unit (kilowatt-hour) of electricity you actually consume.
If you can shift more of your usage to off-peak times, Synergy’s Midday Saver plan offers cheaper rates between 9am-3pm and overnight. That’s handy if you work from home or have flexible appliance timers.
Average Daily Electricity Usage in Perth
Understanding your daily usage helps you figure out if your bill makes sense. The Australian Energy Regulator tracks this stuff, and here’s what they’ve found:
| Household Size | Average Daily Usage (kWh) |
| 1 person | ~12 kWh |
| 2 people | ~14.35 kWh |
| 3 people | ~18.71 kWh |
| 4 people | ~21.36 kWh |
| 5+ people | ~25.43 kWh |
Your electricity meter tracks these units, and you can find your daily average on your Synergy bill. If you’re using significantly more than these figures, something in your home might be working harder than it should.
What Actually Drives Your Power Bill Up
Not all electricity use is created equal. Some things absolutely chew through power, while others barely register.
Heating and cooling is the big one. It accounts for roughly 38% of a typical Perth home’s energy use. Running your air conditioner all summer or your heater through winter will show up on your bill fast. Every degree cooler in summer or warmer in winter costs you extra.
Hot water comes in second at around 25% of usage. If you’ve got an electric storage system heating water 24/7, that’s a constant drain. Heat pump systems and solar hot water can slash this significantly.
Then there’s the usual suspects. Second fridges running in the garage, pool pumps chugging away for hours, old appliances without decent energy ratings, and all those devices sitting on standby. Standby power alone can account for 6% of your total bill.
Your home’s size and age matters too. A 4-bedroom house will typically cost more to run than a 2-bedroom apartment. Older homes without good insulation need more heating and cooling to stay comfortable.
Government Rebates and Credits for WA Households
Here’s where Perth residents catch a break. The government offers several credits to help with power bills.
2025 Household Electricity Credit Every WA household with an active electricity account gets $150 in bill relief for 2025-26. This comes from the Federal Government’s Energy Bill Relief Fund and gets applied automatically to your Synergy or Horizon Power account from October 2025. You don’t need to apply.
Energy Assistance Payment If you hold a Pensioner Concession Card, Health Care Card, or DVA Gold Card, you’re eligible for an annual payment toward your electricity costs. Synergy applies this directly to your account.
Dependent Child Rebate Families with dependent children who hold eligible concession cards can receive $146.84 per child per year. Again, this gets applied automatically once you’re registered.
Hardship Utility Grant Scheme (HUGS) If you’re struggling to pay your bill due to financial hardship, HUGS can cover up to 85% of your outstanding amount. The maximum is $640 per year in the Perth metro area.
For more details on eligibility, check the WA Government’s household electricity credit page.
Practical Ways to Lower Your Electricity Bill
You don’t need a complete home renovation to cut your power costs. Small changes add up.
Sort out your heating and cooling first. Set your air con to 24°C in summer and 18-20°C in winter. These temps are comfortable enough and stop your system from working overtime. Close doors to rooms you’re not using so you’re not cooling or heating empty spaces.
Swap your lighting. Replacing 10 old incandescent globes with LEDs can save around $220 per year. LEDs last way longer too, so you’re not replacing bulbs constantly. If you’re thinking about upgrading your LED lighting or getting new downlights installed, the energy savings usually pay for themselves within a couple of years.
Ditch the second fridge. That old fridge in the garage running 24/7 could be adding $230 or more to your annual bill. If you only need it occasionally, switch it off between uses.
Turn things off at the wall. Game consoles on standby, phone chargers plugged in with nothing connected, TVs in sleep mode—they all draw power. Switching off at the wall when you’re done could save you $35-$70 a year depending on how many devices you have.
Run your pool pump smarter. Cutting your pool pump runtime by 2 hours a day in winter can save around $145 annually. The water’s cooler and needs less circulation anyway.
Consider ceiling fans. A ceiling fan uses a fraction of the power of an air conditioner. On milder days, fans alone might be enough to keep you comfortable.
When an Electrician Can Help
Sometimes reducing your power bill means investing in your home’s electrical system. A few upgrades can pay for themselves over time.
Lighting upgrades are the obvious one. If your home still has halogen downlights, switching to LEDs is one of the best returns you’ll get. The upfront cost is minimal and the ongoing savings are real.
Ceiling fans in bedrooms and living areas reduce your reliance on split system air conditioning. They’re cheaper to run and move air effectively in Perth’s climate.
Switchboard upgrades matter if you’re in an older home. Modern switchboards handle power more efficiently and let you add dedicated circuits for high-draw appliances. If your switchboard still has old ceramic fuses, it’s probably time for an update.
Dedicated circuits for things like ovens, air conditioners, or EV chargers prevent overloading and improve efficiency. Running too many appliances on one circuit creates resistance and wastes power.
Key Takeaways
- A typical Perth household pays between $237-$382 per quarter depending on size
- WA has the lowest average electricity costs in Australia
- Your bill is made up of a daily supply charge ($1.16/day) plus usage (32.37c per kWh)
- Heating, cooling, and hot water account for over 60% of most homes’ electricity use
- Every WA household gets $150 in bill relief for 2025-26, applied automatically
- Simple changes like LED lighting, turning off standby, and adjusting your thermostat can save hundreds annually
If your bill seems higher than these averages, it might be worth looking at what’s drawing the most power in your home. Sometimes a quick electrical assessment can identify issues you didn’t know you had.
