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Cost to run a window / portable air conditioner in Western Australia (2026–27)

WA reference tariff · 33.3c/kWh

$0.40 per hour at 1,200 W

Typical use (6 h/day, 90 days a year at 1,200 W) ≈ $216/year on the Western Power (SWIS) rate.

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

Portable aircon cost in WA at 6 h/day, 90 days/year (33.3c/kWh)
Model bandPer hourPer dayPer monthPer year
Efficient (700 W)$0.23$1.40$42.47$126
Typical (1,200 W)$0.40$2.39$72.80$216
High (2,000 W)$0.67$3.99$121.34$359

Appliance running-cost calculator

WA

Portable aircon: 700–2,000 W typical range.

4–8 h/day, usually one room in the evening; portables often run flat-out.

$0.40 per hour · $216/year at your settings
Per day (6 h)
$2.39
Per month
$72.80
Per year (90 days)
$215.54

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: Aircon Advice — portable AC running costs (AU). Full portable aircon costs in WA →

The same appliance in other states

Cutting the cost

These are the least efficient way to cool a space, so use them as a spot fix, not an all-day habit. Seal the exhaust hose snugly in the window opening so hot air can't sneak back in. Cool one closed room rather than the whole house, and switch to a plain fan once it's comfortable. Empty or drain the unit as directed to keep it running properly.

Frequently asked questions

What does a portable aircon cost per hour in WA?
$0.40 at the typical 1,200 W draw on WA's reference rate of 33.3c/kWh (Western Power (SWIS) network). Efficient models run $0.23, high-draw models $0.67.
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, usually one room in the evening; portables often run flat-out.