As Australia braces for another winter, the question of the cheapest way to stay warm without exorbitant energy bills is more pressing than ever. With electricity and gas prices shifting, understanding the true running costs of different heating systems is crucial for Australian households in 2026.
The clear winner for the cheapest heater to run in Australia in 2026 is a reverse cycle air conditioner (heat pump). These systems consistently outperform other heating options in terms of energy efficiency and running costs, often costing significantly less per hour than electric resistance or gas heaters.
Understanding 2026 Energy Prices in Australia
Electricity and gas prices have seen notable changes leading into winter 2026. The Australian Energy Regulator (AER) released its Default Market Offer (DMO) 2026-27 determination, indicating benchmark electricity prices are decreasing for most residential customers in New South Wales and South East Queensland, with falls between 3.4% and 7.2% for flat rate tariffs. Victoria’s Essential Services Commission (ESC) also announced a 5% average reduction in the Victorian Default Offer (VDO) for households, equating to roughly $84 off annual electricity bills from 1 July 2026.
However, South Australia remains an exception, with flat rate residential DMO prices increasing by 1.4% (around $33 per year), although time-of-use customers may see a slight decrease. Meanwhile, gas prices have generally continued their upward trend, making electricity-based heating solutions increasingly competitive.
For context, average electricity usage rates across major states in July 2026 are approximately:
- New South Wales: ~36.2 cents per kilowatt-hour (c/kWh)
- Victoria: ~29.6 cents per kilowatt-hour (c/kWh)
- South Australia: ~44.6 cents per kilowatt-hour (c/kWh)
These figures are based on standing offers; competitive market offers from retailers can be lower. It’s always advisable to compare plans using government comparison sites like Energy Made Easy or Victorian Energy Compare. For more on navigating your options, see our guide: Choosing Your Australian Energy Provider in 2026: A Definitive Guide.
Running Costs Compared: Heat Pumps vs. Electric vs. Gas
To provide a clear comparison, let’s look at the average running costs for heating a typical living room (e.g., 2.4kW heat load) for 6 hours per night over a 91-night winter period, using a NSW electricity rate of 36.2 c/kWh and a representative gas rate.
1. Reverse Cycle Air Conditioners (Heat Pumps)
Running Cost: Cheapest
Reverse cycle air conditioners, essentially heat pumps, are the most energy-efficient option for heating. Instead of generating heat, they transfer heat from the outside air into your home, making them 3 to 5 times more efficient than traditional electric heaters. Their Coefficient of Performance (COP) typically ranges from 3.5 to 5.0, meaning for every 1 unit of electricity consumed, they deliver 3.5 to 5 units of heat.
Example Running Cost: A 2.5kW reverse cycle split system, such as a Mitsubishi Heavy Industries Avanti Series or Daikin Cora Series, might cost $0.25 to $0.45 per hour to run for a medium-sized room. Over a typical winter in NSW (6 hours/night, 91 nights), this could amount to approximately $119 for the season.
Upfront Cost: Installed costs for a good quality 2.5kW-3.5kW split system range from $1,800 to $4,500, depending on the brand, features, and installation complexity.
2. Electric Heaters (Fan, Convection, Oil Column)
Running Cost: Most Expensive
Standard electric heaters, including fan heaters, convection heaters, and oil column heaters, operate with 100% efficiency (COP of 1). This means every unit of electricity consumed is converted directly into 1 unit of heat. While simple and affordable to purchase, they are the most expensive to run due to this direct conversion.
Example Running Cost: A 2400W electric heater (e.g., DeLonghi 2400W Ceramic Fan Heater or Arlec 2400W Oil Column Heater) consuming 2.4 kWh per hour would cost $0.87 per hour at a 36.2 c/kWh electricity rate. Over the same NSW winter period (6 hours/night, 91 nights), this could total approximately $474 for the season.
Upfront Cost: These heaters are significantly cheaper to buy, typically ranging from $50 to $300.
3. Gas Heaters (Portable & Ducted)
Running Cost: Mid-Range to High
Gas heaters, whether portable or ducted, burn natural gas to produce heat. Their efficiency typically ranges from 80-90%. While historically seen as a cheaper option, rising gas prices have made them less competitive against efficient electric heat pumps.
Example Running Cost: A portable flued gas heater like the Rinnai Avenger 25 (with an input of around 25 MJ/hour) running at 85% efficiency would cost around $0.50 to $0.72 per hour based on average gas usage rates. For the same NSW winter period, this could total approximately $233 for the season. Ducted gas heating systems for an average 100m² home can cost between $1,540 and $3,000+ per year to run.
Upfront Cost: Portable gas heaters typically cost $800 to $1,500. Ducted gas heating systems are a major investment, ranging from $3,000 to $10,000+ for installation.
Heating Cost Comparison Table (NSW Example, 2.4kW heat load, 6 hrs/night, 91 nights)
| Heater Type | Upfront Cost (Installed) | Efficiency (COP/%) | Est. Hourly Running Cost (36.2c/kWh elec, ~2.7c/MJ gas) | Est. Winter Running Cost (91 nights) |
|---|---|---|---|---|
| Reverse Cycle Air Con | $1,800 - $4,500 | COP 3.5 - 5.0 | $0.25 - $0.45 | $119 |
| Electric Resistance | $50 - $300 | COP 1.0 (100%) | $0.87 | $474 |
| Portable Gas Heater | $800 - $1,500 | ~85% | $0.50 - $0.72 | $233 |
| Ducted Gas Heating | $3,000 - $10,000+ | ~80-90% | $0.50 - $0.80 | $1,540 - $3,000+ (annual) |
“A reverse-cycle split system air conditioner (heat pump) is the cheapest heater to run in Australia for most households. A 3.5kW model costs $0.28–$0.36/hour to heat a room, compared to $0.50–$0.79/hour for an electric panel heater and $0.50–$0.72/hour for ducted gas heating.”
Factors Influencing Your Heating Costs
Beyond the heater type, several factors significantly impact your final energy bill:
- Insulation and Draught Proofing: A well-insulated home with sealed gaps will retain heat far more effectively, reducing the need for continuous heating. Consider exploring state rebates for these upgrades. Our guide, Unlock $1,500+ Winter Savings: Your 2026 Australian Insulation & Draught Proofing Rebate Guide, has more details.
- House Size and Layout: Larger, open-plan homes require more powerful and longer-running heaters.
- Climate Zone: Colder regions (e.g., Tasmania, parts of Victoria, NSW highlands) will naturally incur higher heating costs.
- Thermostat Settings: Every degree higher on your thermostat can increase energy consumption by 10%. Aim for 18-20°C for optimal comfort and efficiency.
- Usage Habits: Only heat the rooms you are using, and turn off heaters when leaving a room for an extended period.
- Energy Provider & Tariff: Choosing a competitive market offer over a standing offer can save hundreds annually.
Government Energy Bill Relief and Rebates in 2026
While the universal Federal Energy Bill Relief Fund concluded in December 2025, state and territory governments continue to offer targeted concessions and rebates for eligible households. These are typically for pensioners, concession card holders, and low-income households, and can provide significant annual savings, ranging from $200 to over $800.
Key state-specific programs include:
- Victoria: The Victorian Energy Upgrades (VEU) program offers rebates for energy-efficient upgrades, including heat pump hot water systems and some space heating. Rebates can be up to $1,000 or 50% off, plus federal Small-scale Technology Certificates (STCs). From 1 July 2026, the household income eligibility cap for some rebates shifted from $210,000 to $150,000. Eligible Victorian residents can also access the Annual Electricity Concession (17.5% off the bill) and other targeted support.
- New South Wales: Eligible households can claim the Low Income Household Rebate (up to $285/year), Family Energy Rebate (up to $180/year), and the Seniors Energy Rebate ($200/year).
- Queensland: The Electricity Rebate provides eligible households with $386.34 per year.
- South Australia: Various concessions including the Cost of Living Concession.
- ACT: The Electricity, Gas and Water Rebate is set at $800 per year for 2025-26.
It is crucial to check your state government’s energy website or the energy.gov.au rebate portal for the most current eligibility and application details. You can also refer to our comprehensive guide: Australian Energy Rebates in 2026: Your State-by-State Guide After Federal Relief Ends.
Tips for Lowering Your Heating Bills
- Optimise Your Thermostat: Set your heater to 18-20°C. Every degree above this significantly increases energy use.
- Zone Heating: Only heat the rooms you are actively using. Close doors to unheated areas.
- Draught Proofing: Seal gaps around windows, doors, and floorboards with weather strips and sealants. This is one of the most cost-effective ways to improve home efficiency.
- Insulation: Ensure your ceiling, walls, and floors are adequately insulated. This is a significant long-term investment that pays dividends in energy savings.
- Curtains and Blinds: Keep curtains and blinds closed at night to trap heat, especially on south-facing windows.
- Regular Maintenance: Service your reverse cycle air conditioner annually to ensure it runs at peak efficiency. Clean filters regularly.
- Compare Energy Plans: Regularly review your electricity and gas plans. Market offers are often more competitive than standing offers. The new ‘Solar Sharer Offer’ introduced in NSW, SE QLD, and SA from July 2026 provides three hours of free electricity midday for smart meter users, which could be leveraged for heating if timed correctly.
Bottom Line
For Australian households seeking the cheapest way to heat their homes in 2026, the reverse cycle air conditioner (heat pump) stands out as the most cost-effective heating solution due to its superior energy efficiency. While the upfront investment is higher than basic electric heaters, the long-term running cost savings are substantial, potentially saving you over $350 this winter compared to a plug-in electric heater. Combine this with smart usage habits, good home insulation, and leveraging available state government rebates, and you can significantly reduce your winter energy expenditure.
Always compare specific models, obtain multiple installation quotes, and check for current state-based rebates to maximise your savings.