As winter tightens its grip across Australia in 2026, many households are scrutinising their heating options and the associated costs. The direct answer is clear: reverse-cycle air conditioners remain Australia’s most efficient and cheapest home heating system to run when compared to ducted or portable gas heaters. This holds true despite recent adjustments to electricity and gas prices across states.
Understanding your energy bills has become more complex. While the universal federal Energy Bill Relief Fund ended on 31 December 2025, no new automatic federal rebates are in place for 2026. However, state-level concessions continue, and the Default Market Offer (DMO) and Victorian Default Offer (VDO) for 2026-27, effective from 1 July 2026, have brought varied changes to electricity prices.
Australia’s Energy Price Landscape in July 2026
Electricity prices across the National Electricity Market (NEM) have seen significant shifts. For most states under the Australian Energy Regulator’s (AER) DMO, residential standing offer prices have decreased from 1 July 2026:
- New South Wales: Residential flat rate DMO prices are down by 3.4% to 5.0%, potentially saving households between $66 and $137 annually. Time-of-use (TOU) customers in regional NSW (Essential Energy zone) could see reductions of up to 7.7%, saving up to $211 per year.
- South East Queensland: Households on flat rate DMOs will see a 7.2% reduction, saving approximately $155 per year. TOU customers benefit even more, with up to a 10.7% decrease, equating to around $229 in annual savings.
- Regional Queensland: Households are expected to see a 6.9% to 9.7% drop in electricity costs, saving around $212 annually on Tariff 11.
- Victoria: The Essential Services Commission (ESC) finalised a 5% average reduction in the Victorian Default Offer (VDO) for domestic customers, translating to an average annual saving of $84, with typical annual costs now around $1,591.
- South Australia: Notably, SA is the only DMO region where flat rate residential prices increased by 1.4% (adding $33 annually). However, TOU customers saw a modest 1.1% decrease, saving about $25 per year. South Australia continues to have some of the highest electricity prices nationally.
- Western Australia: Synergy’s Home Plan (A1) customers faced a 2.74% increase from July 2026, with usage rates rising to 33.26c/kWh and daily supply charges to 119.24c/day.
- ACT: Regulated standing offer tariffs increased by an average of 2.7%, resulting in an average annual bill increase of $64 for a typical residential customer.
“This is a positive outcome with prices coming down for the majority of households and all small businesses across the three regions where the DMO safety net applies.” – AER Chair Clare Savage on the 2026-27 DMO determination.
It’s critical to remember that DMO/VDO rates are price caps for standing offers, not necessarily the cheapest market offers. Always compare plans on government-supported websites like Energy Made Easy or Victorian Energy Compare.
The ‘Solar Sharer Offer’ for Smart Meter Households
From 1 July 2026, the new ‘Solar Sharer Offer’ has been introduced in DMO regions (NSW, SE QLD, SA). This opt-in offer provides eligible smart meter households with three hours of free electricity daily (typically 11 AM to 2 PM). This initiative aims to encourage daytime energy use when solar generation is abundant, helping households cut bills and support grid stability. It’s available even if you don’t have solar panels.
Heating System Running Costs Compared: 2026
To provide a tangible comparison, we’ll use an average electricity price of 36.2 cents per kWh (representative of NSW DMO standing offers) and a natural gas price of $0.028 per MJ (approximately 10.08 cents per kWh, based on Melbourne rates).
Here’s how typical heating systems stack up in terms of running costs:
| Heating System | Efficiency (COP/Star Rating) | Typical Power Input/Output | Running Cost (per hour) | Estimated Winter Cost (91 nights, 6 hrs/night) |
|---|---|---|---|---|
| Reverse-Cycle Split System | COP 3-6 (300-600%) | 1-2.5 kW input, 3.5-7 kW output | $0.25 - $0.45 | ~$119 - $245 |
| Ducted Gas Heating | 3-6 Star (85-95%) | 20-36 MJ/h input | $0.50 - $1.01 | ~$233 - $550 |
| Resistive Electric Heater | 100% | 1.5-2.4 kW input | $0.50 - $0.99 | ~$474 - $540 |
Note: Winter cost estimates are illustrative for heating a living room for 6 hours a night over 91 winter nights, using NSW electricity prices as a benchmark. Actual costs will vary based on home size, insulation, thermostat settings, and specific energy tariffs.
Why Reverse-Cycle is So Efficient
Reverse-cycle air conditioners, also known as heat pumps, don’t generate heat directly. Instead, they move heat from one place to another. In winter, they extract heat from the outside air (even cold air) and transfer it indoors. This process is incredibly efficient, with a Coefficient of Performance (COP) typically ranging from 3 to 6. This means for every 1 kWh of electricity consumed, a reverse-cycle system can deliver 3 to 6 kWh of heat. No other electric heater can achieve this level of efficiency, as resistive heaters convert electricity directly to heat at 100% efficiency (COP 1).
Leading efficient reverse-cycle models in Australia for 2026 include the Daikin Zena Series, Mitsubishi Electric AP Series, and Fujitsu Lifestyle Range. These often boast high energy star ratings and advanced inverter technology for optimal performance.
Installation Costs: What to Expect
While running costs favour reverse-cycle, the initial outlay for a new system is a significant factor.
| System Type | Typical Installation Cost (Supply & Install) |
|---|---|
| Reverse-Cycle Split System | $1,500 - $4,500 (single unit) |
| Reverse-Cycle Ducted System | $8,000 - $15,000 |
| Ducted Gas Heating | $3,000 - $10,000 |
Note: These are general estimates for 2026. Costs vary widely based on brand, system size, ductwork complexity, existing infrastructure, and installer rates.
Installing a ducted reverse-cycle system typically costs more upfront than ducted gas heating, especially if existing ductwork cannot be repurposed. However, a single reverse-cycle split system is usually the cheapest to install for heating individual rooms.
Optimising Your Heating Costs in 2026
Beyond choosing an efficient system, several strategies can further reduce your winter energy bills:
- Insulation and Draught Proofing: This is paramount. Up to 40% of heat can be lost through uninsulated ceilings and walls, and draughts. Investing in proper insulation and draught sealing can save you $200-$500 per year on heating costs. For more detailed advice, refer to our guide on Cut Winter Energy Bills by $400+: Best Home Insulation & Draught Proofing Upgrades in Australia 2026.
- Smart Thermostat Use: Set your thermostat to a comfortable yet energy-efficient temperature, typically between 18-20°C. Lowering it by just one degree can save around 10% on heating costs.
- Zoning (Ducted Systems): If you have a ducted system (gas or reverse-cycle), use zoning to heat only the rooms you are currently occupying. This prevents wasting energy on empty spaces.
- Time-of-Use Tariffs: If you’re on a TOU plan, try to run your heating during off-peak periods when electricity is cheaper. The new Solar Sharer Offer in DMO regions (11 AM - 2 PM free power) presents a unique opportunity for smart meter households to run appliances for free.
- Utilise Solar Power: If you have solar panels, maximise self-consumption by running your reverse-cycle system during daylight hours when your panels are generating electricity. This reduces your reliance on grid power and lowers your heating costs significantly. Consider reading our guide on Maximise Your Solar Savings in Australia 2026: Unlock $1,500+ Annually with Smart Strategies.
- Regular Maintenance: Ensure your heating system (both reverse-cycle and gas) is serviced annually. A well-maintained system operates more efficiently and lasts longer.
Rebates and Incentives in 2026
While the broad federal energy bill relief has ended, state and territory governments continue to offer targeted energy concessions for eligible households, typically those with concession cards. These can help offset overall energy costs, including heating. For instance, NSW offers a $200/year rebate for Commonwealth Seniors Health Card holders. It’s advisable to check your state government’s energy website for specific eligibility criteria and available programs.
Bottom Line
For Australian households seeking the most efficient and cost-effective home heating in 2026, reverse-cycle air conditioners are the clear winner. Their superior energy efficiency (COP 3-6) means they deliver significantly more heat per dollar spent on electricity compared to even the most efficient gas heating systems or resistive electric heaters. While initial installation costs for ducted reverse-cycle systems can be higher than ducted gas, the long-term running cost savings overwhelmingly favour reverse-cycle technology. Coupled with falling electricity prices in many states and the new Solar Sharer Offer, making the switch or upgrading to an efficient reverse-cycle system is a sound financial decision for winter warmth and year-round comfort.