The three criteria
Household income, assessed by a method laid down in regulations.
The composition of the household, which modulates ceilings and amounts, notably per dependent child.
The characteristics of the dwelling, including area, some support being reserved to dwellings of a given size.
These three criteria combine. The same income does not open the same rights for every household composition, and the same household does not obtain the same thing for every dwelling.
| Criterion | What it measures | When it is checked |
|---|---|---|
| Income | The household's financial capacity | At application |
| Area | The size of the dwelling | At application |
| Household composition | The number of persons | At application and during the undertaking |
The new method of calculating income
This is the most structural change in the revision made in 2026. It concerns the income conditions.
The calculation of net income now takes in all income, including income not taxable in Luxembourg.
It also takes in the part of family allowances exceeding the statutory amounts.
The stated aim is equal treatment between all applicants, irrespective of their tax position.
An important practical consequence: eligibility assessed under the former method does not transpose. A household receiving income not taxable in Luxembourg may see its reference income rise, and therefore its eligibility change.
This point particularly concerns cross-border households or those with foreign income, a frequent situation in Luxembourg.
Why no scale is reproduced here
Three reasons, consistent with the approach applied throughout this guide. They explain why no figures are reproduced here.
Ceilings are set by regulation and revised, the 2026 revision having concerned precisely how they are determined.
They depend on household composition, which makes any isolated figure unusable and potentially misleading.
Secondary sources give divergent versions of them, with no way for readers to tell which matches their situation.
The applicable scale and the calculation of reference income are to be obtained from the responsible ministry, which processes applications.
The difference from the tax schemes
A distinction useful for organising a file. Income and area conditions are not checked at the same moment.
The tax schemes covered in the previous branches are not subject to a means test. The reduced rate of value added tax and the tax credit on duties depend on the use of the dwelling, not on income.
The support administered by the responsible ministry is subject to a means test.
A household may therefore benefit from the former without being eligible for the latter, and this asymmetry explains many misunderstandings.
It has a practical consequence: do not give up on the tax schemes on the ground that income seems too high for the support.
The associated declaration obligations
Two obligations, whose regime has changed. They concern the declaration and the evidence of income.
Changes in household composition must be reported promptly, an obligation expressly maintained.
Changes relating to employment no longer have to be declared immediately, but at the next review of the file.
This distinction is recent, and it deserves checking rather than assuming, including by long-standing beneficiaries.
What this means for a professional
Four rules.
Never reproduce an income ceiling, it depending on the household and having been revised.
Flag the new calculation method to households with income not taxable in Luxembourg, who are the most affected.
Distinguish means-tested schemes from tax schemes, to avoid giving up by mistake.
Refer to the responsible ministry for any assessment of eligibility.
This article reflects the state of the schemes at the date of checking and serves professional orientation. It does not replace consultation of the responsible ministry.