How Much Does It Really Cost to Run an Air Conditioner?

Running an air conditioner over an Australian summer costs anywhere from $133 to $720, depending on where you live and the type of system you have. The average hourly running cost sits at around $0.62, while the daily cost averages $3.73 over a six-hour day. Queensland and the Northern Territory pay the most because they fall within hot-climate zones. Your cooling costs also depend heavily on your electricity rate, so households and businesses on competitive plans pay noticeably less. If you run a small business with heavy cooling needs, locking in Great Business Electricity Rates before summer peaks can take a real chunk off your quarterly bill.

Cost Per State

The answer depends on three things: your state, your system type, and how many hours you run it. Based on a typical summer of six hours a day across 90 days, here is what cooling costs around the country:

Actual running costs vary depending on your air conditioner size, efficiency, thermostat setting, insulation, and electricity plan.

Queensland sits at the top because its hot, humid summers mean air conditioners work harder for longer. Tasmania sits at the bottom for the opposite reason. So when someone asks how much AC will cost them over summer, the honest answer is that a Brisbane household can pay more than five times what a Hobart household pays for the same six hours a day.

Which Type of Air Conditioner Is Economical to Run?

There is a common belief that bigger systems always cost more to run. The numbers tell a different story. A single split system is actually the cheapest option for most homes. Here is how the three main types compare over a 90-day summer:

• Single split system: $209 (cooling-only) to $277 (reverse-cycle). One indoor unit, one outdoor unit. The most efficient option for cooling a single room or open-plan space.
• Ducted system: $467 (cooling-only) to $520 (reverse-cycle). Air is distributed through ceiling or wall ducts from one central unit. Zone controllers help by cooling only the rooms you are using.
• Portable unit: $520-$578. The most expensive to run per hour, though useful for renters or homes without a fixed system.

A reverse-cycle split system costs a little more to run than a cooling-only model, but it also heats your home in winter, making it the more versatile choice year-round.

If you are working out the cost of running air conditioner systems for your home, the split system wins on efficiency almost every time. The bulk of the running cost comes from the electricity rate and the hours of use, not the size of the box on your wall.

How Much Can an Aircon Cost Per Hour?

An air conditioner costs somewhere between $0.25 and $1.33 per hour to run, depending on the type and your state. By comparison, a standard fan costs around 4 cents an hour. That gap matters for businesses. A café, a small office, or a retail shop running air conditioning through the trading day can rack up serious hours over summer. If you are trying to work out how much running AC costs across a full business week, the per-hour figure adds up fast once you multiply it by opening hours and days.

This is where your electricity plan makes a difference. Two businesses running identical systems for identical hours can pay very different amounts purely because one is on a competitive plan and the other is on a default standing offer. Comparing business electricity plans before summer hits means you are paying the lowest possible rate during the months your cooling costs peak. A quick comparison through Connect With Us on 1300 412 421 can show you what is available for your postcode and usage.

Practical Ways to Cut Your Cooling Costs

You do not need to sweat through summer to keep your bill down. A few habits make a measurable difference:

• Set the thermostat to 24-26°C

Every degree cooler adds roughly 10% to your running cost. Setting it to 24 instead of 21 can save you a noticeable amount on your bill.

• Run it for fewer hours

Cutting from 4 hours to 3 knocks around 25% off your daily cooling costs. Use it during the hottest part of the day and switch it off once things cool down.

• Clean the filters

Clogged filters make the system work harder. Clean or inspect the filters regularly, following the manufacturer’s maintenance recommendations.

• Close doors, windows, and blinds

Keeping cool air in one room is far cheaper than cooling the whole house. Blinds drawn during the hottest hours stop heat from building up.

• Use fans for light cooling

At 4 cents an hour, a fan is a cheap way to stay comfortable when you do not need full air conditioning.

Why Your Electricity Rate Matters More Than You Think

The single biggest lever on your cooling cost, after climate and system type, is the rate you pay per kilowatt-hour. Air conditioners draw a lot of power, so even a small difference in your usage rate compounds over a summer of daily use.

For businesses, this is where the savings really stack up. Commercial premises running ducted air conditioning through summer can spend hundreds of dollars on cooling alone. Reviewing your plan and switching to Energy Australia Business Plans or another competitive retailer before the hot months arrive may help you secure a lower electricity rate. However, it depends on the offers available in your area. If you have not compared your plan in over 12 months, there is a good chance a newer offer could lower your bill.

The same logic applies to households. Making sure you are on a plan with a competitive usage rate for your area is one of the simplest ways to keep summer bills manageable.

Connect With Us can compare plans across multiple retailers and find the most competitive option for your postcode, whether you are running a home or a business.

Summary

Cooling your home over summer costs between $133 and $720, depending on your state and system, with Queensland and the NT paying the most. For most households, a single split-system air conditioner is the cheapest type to run, while portable units cost the most per hour. Setting your thermostat to 24-26°C, cleaning filters, and limiting hours all help. For businesses, especially, the electricity rate you pay has a big impact on your total cooling cost, so comparing plans before summer peaks is worth the few minutes it takes.

Frequently Asked Questions

Q: How much does it cost to run an air conditioner over summer?

Between $133 and $720 for a typical six-hours-a-day, 90-day summer, depending on your state and system type. Queensland is the most expensive at around $720, while Tasmania is the cheapest at about $133.

Q: What is the cheapest air conditioner to run?

For most households, a single split-system air conditioner is the cheapest type to run. It costs $209 to $277 to run over summer, compared to $467 to $578 for ducted and portable units. The efficiency comes from the design, not the size.

Q: How much does aircon cost per hour?

Between $0.25 and $1.33 per hour, depending on the type and your state. A fan, by comparison, costs about 4 cents an hour.

Q: Does my electricity plan affect my cooling costs?

Yes, significantly. Air conditioners draw a lot of power, so your usage rate has a big impact on the total cost. Comparing plans through Connect With Us on 1300 412 421 can help you find a competitive rate before summer usage peaks.

Q: Can businesses reduce their air conditioning costs?

Yes. Beyond efficient use and regular maintenance, switching to a competitive plan makes a real difference for businesses with heavy cooling needs. Comparing commercial offers before summer means you pay a lower rate during your highest-usage months.