Average electricity bill in Perth, per 60-day bill
By Sithum Imarsha Last reviewed
A 2-person home in Perth uses about 12.8 kWh a day (Synergy average). On the Synergy regulated tariff that is about $327 a 60-day bill, $496 a quarter, $166 a month or $1,989 a year. Synergy is the only retailer for almost all Perth homes.
Your result
Your estimated bill
$327
for 60 days
- A month
- $166
- A year
- $1,989
- Usage
- $255.45
- Supply
- $71.54
- Off-peak hot water
- Solar credit
- Supply share
- 22%
- A day
- $5.45
The rates behind it
- Power used
- 12.8 kWh a day (Synergy average)
- Usage rate
- 33.26c/kWh
- Supply charge
- 119.24c a day
- Off-peak hot water rate
- Feed-in rate
Fix the highlighted field to update.
Regulated priceSynergy is the only retailer for almost all Perth homes.
On time of use?See if it is cheaper.
BenchmarkSynergy average for a 2-person home in Perth: 12.8 kWh a day (Synergy customers by household type, FY2023-24)
Hot water
Your network
Regulator
BillingSynergy bills about every 60 days. Type 60 in "Days in your bill" to match yours.
How we calculated this
- Usage is the daily kWh times the days in the bill times the usage rate.
- The supply charge is a fixed amount for every day of the bill.
- Off-peak hot water is added and the solar export credit is taken off. All rates include GST.
Full method, tables and sources: Electricity bill calculator
Usage
12.8 kWh a day (Synergy average) × 60 days × 33.26c/kWh = $255.45
Supply charge
60 days × 119.24c = $71.54
Off-peak hot water and solar
Controlled load kWh × days × its own rate, less solar exports × days × the feed-in tariff. Both are 0 unless you add them under Advanced settings.
Hot water Solar credit
Your bill
$327 for 60 days
This version starts with a 2-person home on Synergy's regulated tariff and a 60-day bill, Synergy's usual billing cycle.
Perth: what to know
Official source
- Synergy is the only retailer for almost all Perth homes. Its 2026-27 regulated price is 33.26c a kWh and 119.24c a day (WA by-law).
- Synergy bills about every 60 days, so this page starts with a 60-day bill, not a quarter.
Estimate
- For Perth we use Synergy's own averages: 8.9 kWh a day for 1 person up to 16.6 for a family. The figures from 3 people up are our own mapping of Synergy's household types.
| Household | kWh a day | Synergy |
|---|---|---|
| 1 person | 8.9 | $249 |
| 2 people | 12.8 | $327 |
| 3 people | 16.1 | $393 |
| 4 people | 16.6 | $403 |
| 5 or more people | 16.6 | $403 |
| kWh a day | Usage | Supply charge | A 60-day bill | A year |
|---|---|---|---|---|
| 5 | $99.79 | $71.54 | $171 | $1,042 |
| 10 | $199.57 | $71.54 | $271 | $1,649 |
| 15 | $299.36 | $71.54 | $371 | $2,256 |
| 20 | $399.15 | $71.54 | $471 | $2,863 |
| 25 | $498.93 | $71.54 | $570 | $3,470 |
| 30 | $598.72 | $71.54 | $670 | $4,077 |
- At regulated prices, the supply charge is the same on every 60-day bill, whatever you use: $71.54 on Synergy. That is 42% of the bill at 5 kWh a day and 11% at 30.
- For the same power at regulated prices, Perth on Synergy is the second cheapest of the 7 capitals in our calculator at 5 kWh a day and the fourth most expensive at 30, each capital on its own network. Of those 7 prices, its usage rate is the third highest and its supply charge the lowest. At 15 kWh a day and those prices, a 60-day bill is $114 less than in Adelaide on SA Power Networks, the most expensive, and $65 more than in Melbourne on CitiPower, the cheapest.
Each row is one 60-day bill with no off-peak hot water and no solar exports. Flat rates for 2026-27, GST included: Synergy 33.26c a kWh and 119.24c a day (Official source). The other capitals' rates: Official source.
Any network, household or bill length: use the main electricity bill calculator.