Klimabonus 2026: Energy Renovation Aids in Luxembourg
The complete overview of energy renovation aids in Luxembourg: amounts, conditions, audit, Klimaprêt and possible combinations in 2026.
01Principle and architecture of the scheme
Klimabonus is the Luxembourg programme of energy renovation aids, managed by the Ministry of the Environment via myenergy. It combines three complementary levers: PRIMe House capital grants (paid after works), the Klimaprêt (1.5% bank loan, with State subsidy bringing the effective rate to 0% for the household), and the energy audit by an approved adviser to scope the project (subsidised up to €1,500).
The programme applies to existing dwellings in Luxembourg, whether owner-occupied or rented. Works must be carried out by companies established in Luxembourg or the EU, and invoices settled within 4 years of the agreement in principle. A 2026 reform introduced a social Topup for low-income households, which can boost the aid by up to 150% of the base amount.
02Eligible works and amounts
Main items (2025-2026 schedule, base amounts excluding social Topup): roof/attic insulation up to €55/m²; external wall insulation up to €110/m²; floor/cellar insulation up to €55/m²; triple-glazed windows up to €150/m² of glazed area; air-to-water or geothermal heat pump €6,000 to €12,000; dual-flow ventilation with heat recovery €3,000 to €5,000; photovoltaic installation €500/kWp (max 20 kWp); EV charging station up to €1,200.
For deep renovations targeting energy class A or B (jump from G/F to A/B), an energy renovation bonus increases subsidies by 25 to 50% depending on the class jump. A 25% bonus is granted if the dwelling is rented at a social or affordable rent. The 2026 social Topup (income ≤ €60,000) increases up to 150% of the base amount and can stack with the other bonuses.
03Procedure and EPC
The procedure starts with a free energy audit by myenergy (neutral advice subsidised up to €1,500). A pre-works Energy Performance Certificate (EPC) is then produced by an approved energy adviser. The EPC classes the building from A (very efficient) to I (very energy-intensive) by primary energy demand and thermal insulation of the envelope.
An agreement-in-principle request is filed on myenergy.lu with the works quote and EPC. Once works are done (within 4 years), a new post-works EPC must show an improvement of at least 2 energy classes (or A/B class achieved). The final dossier with paid invoices triggers the subsidy payment by bank transfer.
04Examples of aid stacking
guide.klimabonus.section4P1
| Item | Cost excl. VAT | PRIMe House base | Social Topup (≤ €60k) |
|---|---|---|---|
| Roof insulation (200 m²) | €20,000 | €11,000 | €16,500 |
| Wall insulation (150 m²) | €30,000 | €16,500 | €24,750 |
| Triple-glazed windows (30 m²) | €18,000 | €4,500 | €6,750 |
| Geothermal heat pump | €30,000 | €12,000 | €18,000 |
| 10 kWp photovoltaic | €20,000 | €5,000 | €5,000 |
Simulate your Klimabonus aids in a few clicks
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Run the simulationFrequently asked questions
Short answers to the most common questions on this topic.
Can Klimabonus subsidies be combined with 3% VAT?
Yes. PRIMe House / Klimabonus subsidies are fully combinable with 3% housing VAT and the effective 0% Klimaprêt. It is one of Europe's most advantageous schemes for energy renovation.
How much can you get for installing a heat pump in Luxembourg?
PRIMe House aid for an air-to-water or geothermal HP ranges from €6,000 to €12,000 depending on type and capacity. With the 2026 social Topup (income ≤ €60,000), it can reach €18,000. Add 3% housing VAT and 0% Klimaprêt.
What is the 2026 social Topup?
An increase up to 150% of the base PRIMe House amount for households whose annual taxable income does not exceed €60,000. It aims to make energy renovation accessible to low-income households. Stackable with other bonuses (social rent, deep renovation).
Is an energy audit required to benefit from Klimabonus?
The free audit by a myenergy adviser is not strictly mandatory but strongly recommended. The EPC by an approved adviser (before and after works) is mandatory for subsidies, and energy improvement must reach at least 2 classes or class A/B.
Does Klimaprêt replace PRIMe House?
No, they are two complementary schemes. PRIMe House = capital grants paid after works. Klimaprêt = 1.5% bank loan with State subsidy bringing the effective cost to 0% for the household. You can and should stack them.
Can co-ownerships benefit from Klimabonus?
Yes. A co-ownership can apply for Klimabonus on works voted at the GM on common parts (roof, facade, collective heating). Each co-owner benefits from the share proportional to their tantièmes. The syndic can also request a Klimaprêt on behalf of the association.
Official sources
Statutes, circulars and publications consulted for this guide.
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