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Cost to run a ducted air conditioner in Western Australia (2026–27)

WA reference tariff · 33.3c/kWh

$1.33 per hour at 4,000 W

Typical use (6 h/day, 90 days a year at 4,000 W) ≈ $718/year on the Western Power (SWIS) rate.

Source: WA Government Standard Electricity Prices 2026–27 (Synergy Home Plan A1), effective 1 July 2026

Ducted aircon cost in WA at 6 h/day, 90 days/year (33.3c/kWh)
Model bandPer hourPer dayPer monthPer year
Efficient (2,000 W)$0.67$3.99$121.34$359
Typical (4,000 W)$1.33$7.98$242.68$718
High (6,500 W)$2.16$12.97$394.36$1,167

Appliance running-cost calculator

WA

Ducted aircon: 2,000–6,500 W typical range.

4–8 h/day across summer for a whole home; near-continuous in heatwaves.

$1.33 per hour · $718/year at your settings
Per day (6 h)
$7.98
Per month
$242.68
Per year (90 days)
$718.46

Tariff: 33.3c/kWh — WA Government Standard Electricity Prices 2026–27 (Synergy Home Plan A1) for the Western Power (SWIS) network, effective 1 July 2026. Wattage basis: Daikin ducted specifications (via Advanced Air). Full ducted aircon costs in WA →

The same appliance in other states

Cutting the cost

Zone it. Only condition the rooms you're actually using, close the vents and doors elsewhere, and hold a moderate thermostat setting rather than blasting cold air. A gentle set-point costs far less to maintain than a chilly one, and running the fan on "auto" stops it circulating once the room is comfortable. Service the filters before summer so the system isn't fighting a clogged return.

Frequently asked questions

What does a ducted aircon cost per hour in WA?
$1.33 at the typical 4,000 W draw on WA's reference rate of 33.3c/kWh (Western Power (SWIS) network). Efficient models run $0.67, high-draw models $2.16.
How is this calculated?
Watts ÷ 1,000 × the tariff = cost per hour, then × hours × days for the period figures. Every figure on this page uses WA's 2026–27 reference rate — change the assumptions in the calculator above.
Is the tariff here what I actually pay?
It's the WA Government Standard Electricity Prices 2026–27 (Synergy Home Plan A1) usage rate for the Western Power (SWIS) network — the government reference. Your market offer may be a little under it; your zone may differ. See WA rates by zone.

Related

Sources — figures current as at 17 July 2026.

4–8 h/day across summer for a whole home; near-continuous in heatwaves.