Heating cost comparison in Luxembourg 2026: gas, oil, heat pump, pellets
Natural gas, heating oil, heat pumps, pellets, direct electricity… which heating system is actually cheapest in Luxembourg in 2026? The answer depends on a parameter that is often overlooked: the cost per kWh of useful heat, not the raw energy price. A heat pump runs on electricity at ~€0.26/kWh — but generates 3.2 kWh of heat for every kWh consumed. This guide compares all heating systems on the same basis, integrates the CO2 tax at €45/tonne in force since January 2026, and helps you identify the most economical solution for your home.
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Compare energy offers →1. The right approach: useful heat per kWh
Comparing gas in €/m³, heating oil in €/litre and electricity in €/kWh is meaningless without factoring in the efficiency of each system. What matters for your bill is the cost of one kWh of heat that actually reaches your home — not the raw cost of the energy consumed.
| System | Typical efficiency / SCOP | Interpretation |
|---|---|---|
| Gas condensing boiler | ~92% | 1 kWh of gas → 0.92 kWh of heat |
| Oil condensing boiler | ~88% | 1 kWh of oil → 0.88 kWh of heat |
| Pellet boiler | ~88% | 1 kWh of pellets → 0.88 kWh of heat |
| Direct electric heater | ~100% | 1 kWh of electricity → 1 kWh of heat |
| Air-to-water heat pump | SCOP ~3.2 | 1 kWh of electricity → 3.2 kWh of heat |
The SCOP changes everything for heat pumps. A SCOP of 3.2 means that for every euro spent on electricity, you get the equivalent of €3.20 worth of heat. This is why a heat pump can be cheaper to run than gas, even though the electricity kWh price appears much higher than gas. The actual SCOP depends on the type of heat pump, the building’s insulation and the operating temperature of the circuit (underfloor heating = higher SCOP).
For pellets and wood, the cost also depends on how you buy: bulk pellets delivered by the tonne are significantly cheaper than bags bought individually at a DIY store. Storage space therefore becomes a direct economic factor.
2. Full comparison in 2026: cost per kWh of useful heat
Based on reference data available in Luxembourg in 2026 — official oil price, gas supplier tariffs, household electricity price with state subsidy, pellet market prices — here is the ranking by useful heat cost:
| Heating system | Raw energy price (ref. 2026) | Efficiency | Cost per kWh of useful heat | Trend |
|---|---|---|---|---|
| Heat pump | ~€0.258/kWh elec. | SCOP 3.2 | ~8.1 ct/kWh | ↓ Favourable |
| Bulk pellets | ~€373/tonne (~7.8 ct/kWh) | 88% | ~8.8 ct/kWh | → Stable |
| Heating oil | ~€0.867/litre (~8.67 ct/kWh) | 88% | ~9.9 ct/kWh | ↑ CO2 rise |
| Bagged pellets | ~€6.79/15 kg (~9.4 ct/kWh) | 88% | ~10.7 ct/kWh | → Stable |
| Natural gas | ~10.5–11.5 ct/kWh all-in | 92% | ~10.8–11.5 ct/kWh | ↑ CO2 rise |
| Direct electricity | ~€0.258/kWh | 100% | ~25.8 ct/kWh | Not recommended as primary heating |
Source: Official oil price: ~€0.867/litre (Feb–Mar 2026, Ministry of Economy). Electricity price: ~€0.258/kWh household reference 2026 (state subsidy included). These figures are indicative — prices vary by supplier and period.
This table presents indicative figures based on 2026 reference data. Your actual heating cost depends on your individual consumption, your building’s insulation, your appliance, and your supplier’s tariffs. For gas and electricity, check our real-time comparator →
3. Natural gas heating
Natural gas remains the most widespread heating system in Luxembourg for existing homes. Around 90,000 households heat with gas. The bill combines the energy price (set by the supplier), Creos network charges, consumption tax, CO2 tax and 8% VAT.
Typical consumption: ~1,545 m³/year (~15,750 kWh of raw gas)
All-in tariff 2026: ~10.5–11.5 ct/kWh thermal
Condensing boiler efficiency: ~92%
Useful heat cost: ~10.8–11.5 ct/kWh
Estimated annual bill: ~€1,700–1,800/year
For comparison: new house with heat pump (7,000 kWh elec.) + gas heating (820 m³) → ~€2,170/year according to government data 2025. Check the gas comparator → for up-to-date tariffs.
Advantages of gas
- Creos gas network widely deployed in Luxembourg
- Condensing boiler installation relatively affordable (€4,000–8,000)
- High heating output, even in very cold weather
- Compatible with domestic hot water
Disadvantages of gas
- CO2 tax at €45/tonne in 2026 — and rising
- Banned in new construction in Luxembourg
- Dependence on European gas markets (volatility)
- CO2 emissions — incompatible with PNEC 2030 targets
Source: Switchr.lu — Luxembourg gas comparator · Luxembourg Government — Heating data 2025
4. Heating oil
Heating oil still serves many Luxembourg homes, particularly in rural areas not connected to the gas network. Its price is controlled by an official maximum price set by the Ministry of Economy under a Programme Contract. In February–March 2026, this maximum stood at around €0.867/litre all-in for a delivery of 2,000 litres.
Typical consumption for older house: ~2,755 litres/year
Reference price: ~€0.867/litre
Raw energy bill: ~€2,390/year
Oil condensing boiler efficiency: ~88%
Useful heat cost: ~9.9 ct/kWh thermal
Total heating + standard electricity: ~€3,760/year (government data 2025)
For comparison: an older house with a heat pump (13,000 kWh elec.) cost ~€3,130/year in 2025 — around €630/year less than oil.
The oil tank: constraint and asset. An oil heating installation requires a tank (underground or in the basement), with mandatory periodic maintenance and inspections. The tank is a fixed cost, but also an advantage: buying oil outside peak demand periods (spring/summer) allows you to smooth out expenses. Note: insurers require tanks to comply with current standards — ageing tanks can generate unexpected costs.
Heating oil systems are banned in new construction in Luxembourg. For existing buildings, replacing a like-for-like oil boiler remains technically possible, but it is not eligible for Klimabonus grants and exposes you to a growing bill via the CO2 tax. Properties with oil heating tend to be penalised on the Luxembourg property market, where the Energy Performance Certificate (CPE) is closely scrutinised by buyers.
5. The heat pump: the most economical system in operation
The heat pump (HP) stands out as the most economical heating system to run in Luxembourg, provided the building is sufficiently insulated and the heating circuit is compatible (underfloor heating or oversized low-temperature radiators). Its principle: it does not produce heat, it transfers it from the outdoor air, ground or water into the building — enabling it to deliver 3 to 4 kWh of heat per kWh of electricity consumed.
Electricity: ~€0.258/kWh
Heat pump SCOP: 3.2
Useful heat cost (HP): 0.258 ÷ 3.2 = ~€0.081/kWh thermal
Gas all-in: ~€0.108/kWh thermal (after 92% boiler efficiency)
The heat pump produces heat ~25% cheaper than gas under real 2026 conditions.
Heat pump owners benefit from choosing a specific heat pump electricity contract — some Luxembourg suppliers offer dual-rate or dedicated tariffs that optimise overnight operation during off-peak hours, reducing running costs further.
6. Pellet and wood heating
Wood energy — whether in granule (pellet), log or chip form — represents an economically attractive alternative, particularly for households with storage space. The fuel is not subject to the Luxembourg CO2 tax (classified as renewable, carbon-neutral over its lifecycle), making it structurally more stable than fossil fuels in a context of rising carbon taxes.
| Type | Indicative price 2026 | Useful heat cost | Storage required |
|---|---|---|---|
| Bulk pellets (delivered) | ~€373/tonne (~7.8 ct/kWh) | ~8.8 ct/kWh useful | Silo / dry cellar |
| Bagged pellets (retail) | ~€6.79/15 kg (~9.4 ct/kWh) | ~10.7 ct/kWh useful | Minimal (garage) |
| Firewood (logs) | ~€0.04–0.05/kWh | ~5–6 ct/kWh useful | Outdoor storage space |
Buying bulk pellets in spring or early summer, outside the heating season, often yields better prices. If your home has a suitable dry cellar or outbuilding, a pellet silo is an investment that pays back from the first season.
Luxembourg regulations govern emissions from wood heating. Pellet quality (ENplus A1 standard) and regular burner servicing are essential to maintain optimal efficiency and meet environmental standards. Annual chimney sweeping is mandatory. Check local municipal rules — some communes have additional restrictions on open fireplaces.
7. Direct electric heating
Direct electric heating — inertia heaters, convectors, electric underfloor heating — converts 1 kWh of electricity into 1 kWh of heat (~100% efficiency). This is technically the maximum possible efficiency, but economically the most expensive option for primary heating, since it does not benefit from the multiplier effect of the heat pump.
Direct electric heating: 15,000 kWh × €0.258/kWh = €3,870/year
Heat pump (SCOP 3.2): 15,000 ÷ 3.2 × €0.258/kWh = €1,209/year
Difference: ~€2,660/year in favour of the heat pump
Direct electric heating is appropriate as occasional supplementary heating or in secondary rooms that are rarely used — not as the primary heating solution.
Legitimate use cases for direct electric heating: Modern inertia radiators perform well as a supplement in bathrooms or secondary rooms. They require no maintenance, are simple to install, and can be remotely controlled. In very well-insulated buildings (near-passive standards), residual heat from appliances can sometimes cover a significant part of heating needs, narrowing the gap with a heat pump.
8. The CO2 tax effect on fossil fuels
Introduced in Luxembourg in 2021 at €20/tonne of CO2, the carbon tax follows a regular increase of €5/tonne per year. In 2026 it reaches €45/tonne. It applies to heating oil, natural gas and transport fuels — not to renewable energies (electricity, pellets, wood).
| Year | CO2 tax (€/tonne) | Impact on gas bill (~1,545 m³/year) | Impact on oil bill (~2,755 litres/year) |
|---|---|---|---|
| 2021 | €20/t | ~+€56/year | ~+€72/year |
| 2023 | €30/t | ~+€84/year | ~+€108/year |
| 2025 | €40/t | ~+€112/year | ~+€144/year |
| 2026 | €45/t | ~+€126/year | ~+€162/year |
The trajectory of the CO2 tax beyond 2026 has not yet been set by law. The Luxembourg government must decide whether to maintain, increase or adjust it. Given the PNEC 2030 objectives (55% emissions reduction), continuation of the upward trend is likely. Calculating your fossil fuel heating cost with a rising CO2 tax in mind is therefore prudent for any long-term investment decision.
The CO2 tax does not apply to electricity in Luxembourg. This is a structural asymmetry that benefits electric systems (heat pumps, direct heating) and wood energy compared to gas and oil — and this advantage grows with every tax increase.
9. Which heating system for your situation?
There is no universal answer — the best heating system depends on your property, your circumstances and your time horizon. Here are the most common scenarios in Luxembourg:
A heat pump is the only option compliant with Luxembourg regulations — gas and oil are banned in new buildings. An air-to-water heat pump paired with underfloor heating is the standard solution, often combined with solar PV panels for self-consumption. Klimabonus grants are available.
An air-to-water heat pump is economically very attractive, with a high SCOP thanks to low operating temperatures. Typical ROI: 4 to 7 years after Klimabonus grants. If your fossil fuel boiler is nearing end of life, now is the right moment to switch.
A heat pump still makes sense but SCOP will be lower. It is recommended to combine the heating transition with insulation works (roof, windows) — the Klimabonus covers both. Without insulation, a pellet boiler can be a cost-effective interim solution.
A pellet boiler is a credible alternative to a heat pump, with a similar heat cost and no dependence on electricity. It requires storage space and regular supply, but the fuel is stable in price and exempt from CO2 tax.
The economic case does not yet necessarily justify replacing a recent boiler in perfect condition. Focus on optimising your gas contract (switch gas supplier →) and plan your transition for 5 to 10 years from now, keeping an eye on available grants.
Optimise your energy contract now
Whatever your current heating system, choosing the right electricity or gas contract can save you several hundred euros per year — with no works required.
Compare energy offers →Frequently asked questions about heating costs in Luxembourg
What is the cheapest heating system in Luxembourg in 2026?
In terms of running cost per kWh of useful heat, the heat pump is the cheapest option (~8.1 ct/kWh), closely followed by bulk pellets (~8.8 ct/kWh). Heating oil and gas sit around 10–11 ct/kWh, and direct electric heating exceeds 25 ct/kWh, making it unsuitable as a primary heating solution. These figures are indicative — actual costs depend on your insulation, appliance and supplier.
Can you still install a gas or oil boiler in Luxembourg?
In a new building, no — gas and oil boilers are banned. In existing buildings, replacing a like-for-like boiler remains technically possible, but is not eligible for Klimabonus grants and exposes you to a growing bill via the CO2 tax. The PNEC explicitly envisages a mandatory replacement obligation for fossil heating systems if voluntary targets are not met.
What grants are available to change your heating system in Luxembourg?
The main scheme is the Klimabonus, which covers up to 62.5% of costs for certain installations (heat pump, insulation, solar panels). Since January 2026, solar grants are deducted directly from the installer’s invoice — no upfront cash required. The BCEE Klimaprêt offers preferential rate loans (1.5%) for energy renovation works. For details and eligibility, see our guide: energy aid and subsidies in Luxembourg →
Is a heat pump worth it in an older home?
Yes, but the ROI (payback period) is longer than in a well-insulated home. For an older, energy-hungry building, combining the heating transition with insulation works (both Klimabonus-eligible) is often the best approach: annual savings are greater, the heat pump’s SCOP is improved with low-temperature operation, and the property’s market value increases. Without insulation, a pellet boiler can be a cost-effective intermediate step. See our guide: gas boiler vs heat pump →
Will the CO2 tax keep rising?
The trajectory up to 2026 was set by law (€5/tonne increase per year since 2021). Beyond 2026, the government must decide. Given Luxembourg’s PNEC 2030 objectives and European targets for 55% emissions reduction, a continuation of the upward trend is likely. For households heating with gas or oil, each €5/tonne increase represents approximately €10–15 extra per year on the heating bill.
Is it better to buy pellets in bulk or in bags?
In bulk, if you can — the difference is significant. Bulk pellets with delivery cost around 7.8 ct/kWh, versus ~9.4 ct/kWh for retail bags — a 20% premium. For a home consuming 15,000 kWh of heat per year, that amounts to around €240 difference. The prerequisite is a silo or dry storage room. Group purchases with neighbours can also reduce delivery costs.
What electricity contract should I choose with a heat pump?
With a heat pump, electricity consumption is significant (6,000–13,000 kWh/year depending on the property). It is worth comparing specific heat pump offers from Luxembourg suppliers, which may include advantageous dual-rate tariffs for overnight operation. The Switchr.lu comparator → helps you identify the best-value offer for your estimated annual consumption.