As winter approaches in 2026, many Australian households are evaluating their heating options. The clear winner for cost-effective warmth is the reverse cycle air conditioner, which can save households hundreds, if not over a thousand, dollars annually compared to traditional electric resistance or natural gas heaters. While upfront costs vary, the long-term operational savings of a reverse cycle system are substantial.
This comprehensive guide breaks down the running costs of the three primary heating methods in Australia for 2026, providing real figures based on current energy prices and appliance efficiencies. We’ll also explore available rebates and practical tips to reduce your heating bills.
Understanding Heating Efficiency: COP Explained
To accurately compare heating costs, it’s crucial to understand efficiency. Traditional electric resistance heaters (like bar heaters or oil column heaters) are 100% efficient, meaning 1 kilowatt (kW) of electricity consumed produces 1 kW of heat. Their Coefficient of Performance (COP) is 1.0.
Gas heaters, while generally efficient for combustion, still convert fuel directly to heat. A modern 5.8-star rated gas heater typically operates at around 89% efficiency.
Reverse cycle air conditioners, however, are heat pumps. Instead of generating heat, they move existing heat from the outside air into your home, even on cold days. This makes them incredibly efficient, with COPs typically ranging from 3.0 to 5.0, meaning they produce 3 to 5 kW of heat for every 1 kW of electricity consumed.
“Reverse cycle air conditioners typically have a COP of 3 to 4, meaning they produce 3 to 4 units of heat for every unit of electricity consumed. This is significantly higher than the efficiency of traditional electric heaters, which have a COP of 1.”
Current Australian Energy Prices (2026)
Energy prices in Australia vary significantly by state and retailer. For this comparison, we’ll use representative average residential usage rates in cents per kilowatt-hour (c/kWh) for electricity and cents per megajoule (c/MJ) for natural gas, effective from July 2026. It’s important to remember that these are average figures; actual costs depend on your specific retailer, tariff, and usage patterns.
Electricity prices on the Default Market Offer (DMO) for NSW, QLD, and SA, and the Victorian Default Offer (VDO) have seen varied changes from July 1, 2026. Most regions experienced decreases, with South Australia being an exception for residential customers with a modest 1.4% increase.
| State | Average Electricity Usage Rate (c/kWh) | Average Gas Usage Rate (c/MJ) |
|---|---|---|
| New South Wales | 33.0 c/kWh | 2.72 c/MJ |
| Victoria | 29.0 c/kWh | 2.58 c/MJ |
| South East QLD | 30.0 c/kWh | 2.45 c/MJ |
| South Australia | 38.0 c/kWh | 3.05 c/MJ |
| Western Australia | 33.0 c/kWh | N/A (Limited Gas Network) |
| Tasmania | 29.0 c/kWh | 5.73 c/MJ |
| ACT | 27.5 c/kWh | N/A (Limited Gas Network) |
Note: Gas is not widely available for residential heating in WA or ACT, or its usage is minimal compared to electricity.
Heater Running Costs Compared (Per Hour for 2.4kW Heat Output)
To provide a practical comparison, we’ll calculate the hourly running cost for a medium-sized room requiring a sustained heat output of 2.4 kW. This is a common capacity for a single-room heater or a zone in a larger system.
1. Electric Resistance Heaters
- Appliance Example: A standard 2.4kW electric panel heater.
- Efficiency (COP): 1.0 (100% efficient)
- Electricity Consumption: 2.4 kW input = 2.4 kWh per hour.
| State | Hourly Cost for 2.4kW Output |
|---|---|
| New South Wales | $0.79 |
| Victoria | $0.70 |
| South East QLD | $0.72 |
| South Australia | $0.91 |
| Western Australia | $0.79 |
| Tasmania | $0.70 |
| ACT | $0.66 |
2. Natural Gas Heaters
- Appliance Example: Rinnai Avenger 25 portable gas heater (5.8-star energy rating).
- Efficiency: Approximately 89.3% (derived from 6.2kW output for 25 MJ/hr input).
- Gas Consumption for 2.4kW heat: 9.68 MJ per hour (2.4 kW output / 0.893 efficiency * 3.6 MJ/kWh conversion).
| State | Hourly Cost for 2.4kW Output |
|---|---|
| New South Wales | $0.26 |
| Victoria | $0.25 |
| South East QLD | $0.24 |
| South Australia | $0.30 |
| Western Australia | N/A |
| Tasmania | $0.55 |
| ACT | N/A |
3. Reverse Cycle Air Conditioners
- Appliance Example: Daikin Alira X 2.5kW split system (heating capacity 3.2kW, COP 4.30-5.00). We’ll use an average COP of 4.5 for heating.
- Efficiency (COP): 4.5
- Electricity Consumption for 2.4kW heat: 0.533 kWh per hour (2.4 kW output / 4.5 COP).
| State | Hourly Cost for 2.4kW Output |
|---|---|
| New South Wales | $0.18 |
| Victoria | $0.16 |
| South East QLD | $0.16 |
| South Australia | $0.20 |
| Western Australia | $0.18 |
| Tasmania | $0.15 |
| ACT | $0.15 |
Annual Running Cost Comparison (Estimated)
Assuming a typical usage of 4 hours per day for 150 days during the cooler months (600 hours per year for a 2.4kW heat output):
| State | Electric Heater (Annual) | Gas Heater (Annual) | Reverse Cycle (Annual) | Potential Annual Savings (RC vs. Gas) |
|---|---|---|---|---|
| New South Wales | $474.00 | $156.00 | $108.00 | $48.00 |
| Victoria | $420.00 | $150.00 | $96.00 | $54.00 |
| South East QLD | $432.00 | $144.00 | $96.00 | $48.00 |
| South Australia | $546.00 | $180.00 | $120.00 | $60.00 |
| Western Australia | $474.00 | N/A | $108.00 | N/A |
| Tasmania | $420.00 | $330.00 | $90.00 | $240.00 |
| ACT | $396.00 | N/A | $90.00 | N/A |
Note: These figures represent the cost for 2.4kW of heat output. For whole-home heating or larger areas, total consumption would be higher, but the relative savings of reverse cycle remain consistent or even increase.
For a typical Australian household relying on a gas heater for primary heating, switching to an efficient reverse cycle system could result in annual savings of hundreds of dollars, potentially exceeding $1,200 if replacing old, inefficient systems or heating larger areas. This is derived from the significant difference in hourly running costs, amplified over a full heating season.
Factors Affecting Your Actual Heating Costs
While the efficiency comparison is clear, several factors influence your actual heating bill:
- Insulation and Draught Proofing: A well-insulated home retains heat much better, reducing the amount of energy needed to stay warm. Consider upgrading your insulation and sealing gaps. Our guide, Unlock $1,500+ Winter Savings: Your 2026 Australian Insulation & Draught Proofing Rebate Guide, offers valuable insights.
- Thermostat Settings: Every degree higher significantly increases energy consumption. Aim for a comfortable 18-20°C.
- Heating Zones: Only heat the rooms you are using. Reverse cycle systems excel at zoning.
- Energy Tariffs: Time-of-use (TOU) tariffs can offer cheaper electricity during off-peak hours, which may be beneficial if you can program your heating. Understand your current plan by reading our guide, Choosing Your Australian Energy Provider in 2026: A Definitive Guide.
- Appliance Age and Maintenance: Older units are less efficient. Regular servicing ensures optimal performance.
Government Rebates and Concessions in 2026
While direct rebates for space heating systems are less common, several government programs can indirectly reduce heating costs or support energy-efficient upgrades:
- Victorian Energy Upgrades (VEU) Program: Victoria offers incentives for installing energy-efficient heating and cooling systems, including heat pumps, and heat pump hot water systems. Eligible households can receive discounts up to $1,000, or even $1,400 for locally made products.
- Federal Small-scale Technology Certificates (STCs): This national scheme provides an upfront discount on eligible heat pump hot water systems, typically saving several hundred to over a thousand dollars. While not for space heating, a heat pump hot water system significantly reduces overall household energy consumption.
- NSW Energy Savings Scheme (ESS): In NSW, the ESS offers discounts on energy-efficient upgrades, including heat pump hot water systems, with savings up to $640 for replacing an electric system or $330 for replacing a gas system.
- Energy Bill Relief Fund & Concessions: The federal Energy Bill Relief Fund ended in December 2025. However, state and territory governments continue to offer targeted energy concessions for eligible households, typically for concession card holders, pensioners, or those with specific medical conditions. For more details, consult our comprehensive guide: Australian Energy Rebates in 2026: Your State-by-State Guide After Federal Relief Ends.
Bottom Line
When comparing heater running costs in Australia for 2026, reverse cycle air conditioners are by far the most economical choice for space heating. Their superior energy efficiency (COP of 3.0-5.0) means they deliver significantly more heat per dollar spent on electricity than traditional electric resistance heaters or even modern natural gas heaters. While gas may appear cheaper per unit of energy (MJ) in some states, the conversion efficiency gap makes reverse cycle the clear winner in operational costs.
Investing in a modern, efficient reverse cycle system, coupled with good home insulation and smart usage habits, will result in the lowest possible heating bills for Australian households in 2026 and beyond. For those still relying on older, less efficient heating, the long-term savings from upgrading to reverse cycle can quickly offset the initial investment, potentially saving over $1,200 annually on heating alone for an average home.