Heat pump in Luxembourg: install in 2026 or wait until 2027?
Should you install a heat pump in Luxembourg in 2026 or wait until 2027? The question is becoming increasingly relevant. Financial support is already temporarily increased, while a new pre-financing system is due to start from January 2027.
The key point is that waiting until 2027 does not automatically mean receiving a higher subsidy. The right decision depends on the amount of support available, the cash that must be advanced, the condition of the existing heating system and the timing of the project.
Heat pump in 2026 or 2027: what to know before deciding
- The temporary increase can add €2,000 to the Klimabonus for eligible heat pumps.
- Eligible orders must be placed between 1 January 2026 and 30 June 2027.
- The corresponding invoice must be issued no later than 31 December 2028.
- Heat pump pre-financing starts from 1 January 2027 for eligible projects.
- Pre-financing changes the amount that needs to be advanced, not the value of the grant itself.
- The technical suitability of the home remains more important than choosing a year based only on subsidies.
Choose the right timing for your heat pump project
Should you really wait until 2027 to install a heat pump?
Not simply to receive a higher subsidy. The increased Klimabonus amounts are already available in 2026 for eligible projects. The main change planned for January 2027 concerns how the financial support can be paid.
Under the standard procedure, the homeowner pays for the installation and then applies for the subsidy. With pre-financing, a participating company can deduct the eligible support directly from the amount payable before being reimbursed by the State.
Key point: waiting until 2027 can reduce the amount of cash you need to advance. It does not, by itself, increase the amount of financial support.
The decision should therefore start with the condition of the existing heating system and the technical suitability of the home, rather than with the calendar alone.
What heat pump support is available in Luxembourg?
Air-to-water
Up to €12,000
For an existing single-family home, the temporarily increased amount can reach €12,000 when an eligible air-to-water heat pump replaces a fossil-fuel boiler or direct electric heating system.
Ground-source
Up to €14,000
A qualifying ground-source heat pump can receive up to €14,000 when it replaces the relevant existing heating system in a single-family home.
Related work
Additional support
Oil-tank removal and certain adaptations to the existing heat distribution system can also qualify for financial support when the relevant conditions are met.
The exact amount depends on the building, the system being replaced and the technical conditions. For a detailed explanation, read our guide to the additional €2,000 available for eligible heat pumps in Luxembourg.
Heat pump in 2026 or 2027: the useful comparison
| Criterion | 2026 | 2027 |
|---|---|---|
| Temporary €2,000 increase | Available for eligible projects | Still available for eligible orders placed by 30 June 2027 |
| Heat pump pre-financing | Not available | Available from 1 January 2027 under the applicable conditions |
| Automatically higher grant | No | No |
| Upfront cash requirement | Standard reimbursement procedure | Can be reduced through pre-financing |
| Current enoprimes special bonus | Potentially available for eligible 2026 applications | The current temporary offer does not automatically extend into 2027 |
| Main advantage | Complete a technically ready project without unnecessary delay | Reduce the amount of financial support that must be advanced |
Does waiting until 2027 always make sense?
No. Waiting can make sense when advancing the subsidy creates a genuine financing constraint. In that situation, the pre-financing system may make the project easier to fund.
However, if the existing boiler needs replacing, the home is already suitable for a heat pump and the financing is available, delaying the project simply because the year changes does not necessarily create an advantage.
The reasoning that should come before the calendar
- Check the actual heating demand of the building.
- Confirm whether the existing radiators or underfloor heating are suitable.
- Identify which heating system is actually being replaced.
- Calculate the real project cost after applicable financial support.
- Determine whether pre-financing genuinely improves the project for your household.
How will heat pump pre-financing work from 2027?
From 1 January 2027, an eligible homeowner will be able to use the pre-financing procedure when working with a company registered for the scheme.
The eligible financial support can then be deducted directly from the amount payable. The installer submits the relevant application and receives reimbursement through the system.
The main advantage is therefore cash flow. The household may no longer need to advance the full subsidy amount before receiving it back. The value of the Klimabonus itself does not increase because pre-financing is used.
How does the 2026 enoprimes bonus affect the decision?
For its 10th anniversary, enoprimes is temporarily offering an additional €1,000 for a standard heat pump and €700 for a hybrid heat pump for eligible applications opened between 1 July and 31 December 2026.
This can strengthen the case for a 2026 project in some situations, but eligibility needs to be checked before the project is signed.
The enoprimes application must notably be submitted before the quotation is signed. It should therefore be included in the project planning rather than added retrospectively to a financing calculation.
The 8 questions to ask before choosing between 2026 and 2027
| Question to ask | What the answer should clarify |
|---|---|
| Does my current heating system need replacing soon? | Whether delaying the project creates an unnecessary risk. |
| Is my home technically suitable for a heat pump? | Heat demand, flow temperature and the suitability of the heat emitters. |
| Which Klimabonus amount applies to my project? | The real subsidy rather than a theoretical maximum. |
| Which heating system is being replaced? | Whether the higher replacement-related amount can apply. |
| Can I advance the subsidy amount? | Whether 2027 pre-financing provides a genuine benefit. |
| Can the project qualify for enoprimes? | Whether an additional temporary incentive can be obtained. |
| When will the system be ordered? | Whether the temporary €2,000 increase remains available. |
| When will the invoice be issued? | Whether the timing meets the applicable grant and pre-financing rules. |
For the technical side of the decision, read our complete heat pump guide for Luxembourg in 2026.
Project ready in 2026
If the home is suitable, the heating system needs replacing and financing is available, waiting until 2027 does not automatically provide more support.
Upfront cash is the issue
If advancing the subsidy is the main obstacle, planning around the 2027 pre-financing system may be relevant.
Project still uncertain
Do not choose the year first. Start with a technical assessment of the building and existing heating system.
Assess the right timing for your home
Ecoclima assesses the existing heating system, heat emitters, building requirements and applicable financial support before sizing the heat pump. The objective is to design a coherent system and choose the right project timeline rather than simply chasing a subsidy deadline.
Sources and methodology
- Guichet.lu: Klimabonus 2026 for technical installations
- Klima-Agence: Klimabonus Wunnen 2026–2030
- enoprimes: 10th anniversary special offer
Methodology: the amounts, dates and procedures were checked against the official information available on 14 August 2026. The comparison deliberately separates the value of the financial support from the way it is financed.
Final eligibility depends on the building, heating system, project dates and compliance with the applicable technical and administrative requirements.
2026–2027 FAQ
FAQ: heat pump grants and pre-financing in Luxembourg
Six direct answers about the temporary 2026 grant increase, 2027 pre-financing and the timing of a heat pump project.
Will heat pump grants be higher in 2027?
Not automatically. The main change in 2027 is pre-financing. The subsidy does not become larger simply because the project is completed in 2027.
Until when is the additional €2,000 available?
Eligible heat pumps must be ordered no later than 30 June 2027, with the corresponding invoice issued no later than 31 December 2028.
How much support is available for an air-to-water heat pump in 2026?
For an existing single-family home, the temporarily increased amount can reach €12,000 when an eligible air-to-water heat pump replaces an existing fossil-fuel boiler or direct electric heating system.
What does pre-financing change from 2027?
For an eligible project, the financial support can be deducted directly from the amount payable instead of the homeowner advancing the full subsidy before reimbursement.
Should I wait until 2027 before requesting a quotation?
No. A technical assessment can be carried out beforehand so that the heating demand, heat emitters, required adaptations and project schedule are already understood.
Can Klimabonus and enoprimes be combined?
enoprimes support may be combined with State financial aid when the conditions of each scheme are met. The enoprimes application must notably be submitted before the quotation is signed.