Photovoltaic panels
The Klimabonus subsidises residential PV installations on a degressive scale. New in 2026: pre-financing lets you deduct the subsidy directly from your installer's invoice.
Home battery
The Klimabonus 2026 subsidises the installation of a residential storage battery coupled with a PV installation.
- €150/kWh of installed capacity
- Maximum of €2,250 per installation
- Maximum eligible capacity: 15 kWh
- Must be coupled with a PV installation
Heat pump
Subsidies vary depending on the type of heat pump and whether it replaces an existing fossil heating system.
Insulation & Renovation
The Klimabonus subsidises thermal insulation and energy renovation works, with an overall cap of €50,000.
Global renovation bonus
If you carry out 3 or more works within 24 months, you receive a 15% top-up on all Klimabonus aid related to these works.
Available cumulative aid
Reduced 3% VAT
For any home older than 2 years. Automatically applied on the installer's invoice.
Zero-interest Klimaprêt
Interest-free loan up to €100,000 to finance works eligible for the Klimabonus.
Municipal aid
Some municipalities offer additional bonuses (up to €1,000 or more depending on the municipality).
Social top-up +25%
Low-income households benefit from a 25% top-up on Klimabonus aid.
HEMS €500
Aid for an energy management system connecting ≥ 2 devices (PV, battery, charger, heat pump…).
Pre-financing
The PV subsidy can be deducted directly from the installer's invoice, no upfront payment needed.
How to get your subsidies, in 5 steps
Energy audit
Have an audit carried out (free myenergy energy advice) to identify priority works.
Declaration on guichet.lu
Declare your project online on guichet.lu before starting works. You will receive an acknowledgement.
Carrying out the works
Have the works carried out by a certified installer. Keep all invoices and certificates.
Aid request
Submit your aid request within 12 months of completion via guichet.lu.
Payment
The aid is paid by bank transfer after validation of the file (average delay: 2 to 4 months).
Eligibility conditions
Home in Luxembourg
The applicant must be the owner or tenant of a home located in the Grand Duchy.
Certified installer
The works must be carried out by a professional authorised in Luxembourg.
Technical standards
Materials and equipment must comply with European standards and Klimabonus criteria.
Prior declaration
The declaration must be submitted on guichet.lu before starting works.
Application deadline
The aid request must be submitted within 12 months of the end of works.
Energy certificate before/after
An energy performance certificate may be required for renovation works.
Frequently asked questions
Are subsidies retroactive?
What is the deadline for submitting the aid request?
Are second homes eligible?
Is self-building eligible?
Until when is the Klimabonus programme valid?
Can several subsidies be combined?
Official links and resources
Consult the official sources for the most up-to-date information.