Heat Pump vs. Gas: Cost Comparison 2026 (Austria)
Summary (TL;DR)
TL;DR: A heat pump on an aWATTar HOURLY tariff heats at 2–3 ct/kWh of useful heat in 2026. Gas costs 10–15 ct/kWh. That means 3–5× lower heating costs. Federal subsidies up to €7,500 (federal + state) make the investment attractive. Payback period: 8–12 years.
Gas vs. Heat Pump: The Real Cost Calculation
Many homeowners only compare purchase prices and overlook running costs. With heat pumps, the savings come primarily from ongoing operation — especially when you're on a dynamic electricity tariff.
Gas Heating (2026)
- Gas price (Austria): 10–15 ct/kWh (net calorific value)
- Boiler efficiency: ~90%
- Effective cost per kWh of heat: 11–17 ct/kWh
- Annual heating demand (house, 120 m²): ~12,000 kWh
- Annual gas costs: €1,320–2,040
- CO2 tax (from 2026): +€0.12/m³ → approx. +€100–150/year
Heat Pump with Dynamic Tariff (2026)
- COP (Coefficient of Performance): 3–4 (air-to-water HP at 0°C)
- Off-peak electricity (aWATTar HOURLY, 0–6 AM): 3–8 ct/kWh
- Heat cost at COP 3.5, 5 ct/kWh: 1.4 ct/kWh
- Annual electricity consumption: 12,000 kWh ÷ 3.5 = ~3,430 kWh
- Annual electricity costs: €170–275 (off-peak tariff)
Comparison: Gas €1,320–2,040/year vs. Heat Pump €170–275/year → Saving: €1,000–1,700/year
Federal and State Subsidies (Austria 2026)
| Programme | Amount | Requirement |
|---|---|---|
| Federal subsidy (Sanierungsbonus) | Up to €7,500 | Replace fossil heating |
| State subsidies (e.g. Lower Austria) | €1,000–3,000 | Varies by state |
| aWATTar HOURLY tariff | No surcharge | Smart Meter required |
Total subsidy: up to €10,500 (for gas-to-heat-pump switch)
Investment Costs and Payback
- Heat pump (air-to-water, 8 kW): €12,000–18,000 installed
- After subsidies: €5,000–10,500 net investment
- Annual saving: €1,000–1,700
- Payback period: 6–10 years
Conclusion
A heat pump combined with a dynamic electricity tariff (aWATTar HOURLY or Tibber) is the most cost-effective heating solution in Austria in 2026. The combination of low off-peak electricity prices, a COP of 3–4, and generous subsidies means gas heating cannot compete on operating costs.
About the Author
Christian Werner is an IT consultant and founder of Werner.Solutions in Graz, Austria. He helps Austrian households and SMEs optimise their energy costs through dynamic electricity tariffs and smart automation — combining IT expertise with practical energy consulting.
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