Applying for the cost-of-living benefit


Due to the current situation related to COVID-19, the reception desk at the National Solidarity Fund (FNS) is currently closed but can be contacted by telephone.

This measure has no impact either on the processing of your file or on the payment of your benefits and other allowances.

Find out more about the online procedures and application forms for the FNS.

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Upon application and in certain conditions, the National Solidarity Fund (Fonds national de solidarité – FNS) awards a specific benefit to low-income households.

To receive the cost-of-living benefit, household income must not exceed a certain threshold. The amount of the benefit is determined on the basis of the applicant's household (whether the applicant lives alone or with several other people).

Who is concerned


Households with modest incomes (which do not exceed the allocation limits set by Grand Ducal regulation) are eligible for the cost-of-living benefit.

Excluded persons

The following persons are not entitled to the cost-of-living benefit:

  • persons receiving State financial aid for students in higher education (Aide financière de l'Etat pour études supérieures);
  • third-country nationals who have entered Luxembourg as students, pupils, trainees, volunteers or au pairs;
  • persons who are the subject of a preventive detention order or who have been sentenced to a term of imprisonment, except during the period of day parole, regardless of whether:
    • their sentence has been suspended; or
    • they have been released on parole; or
    • they have been put under electronic monitoring.


Anyone who wishes to benefit from the cost-of-living benefit must:

  • be legally resident in Luxembourg;
  • be listed on the main register of the National Registry of Natural Persons (RNPP);
  • actually live at the address where they have their place of usual residence;
  • have been living in Luxembourg continuously for 12 months before the month in which the application is submitted;
  • have a low annual income, either alone, or cumulatively with the persons belonging to their household at the time of submitting the application.

All persons belonging to the household on the date the application is filed are considered as applicants for the benefit for the current year. The applicant in whose name the application is submitted is deemed to be the main applicant.


The National Solidarity Fund (FNS) must receive the complete application between 1 January and 30 September of the current year. The postmark serves as proof of the date.

Applications submitted after 30 September of the current year will be rejected.

How to proceed

Filing an application

Application forms can be downloaded below, under "Forms / Online services".

The application for the cost-of-living benefit includes information about the household and must be signed by all of its adult members.

The application must be completed, signed and sent by post to the FNS.

Persons who have already received the cost-of-living benefit will receive a form from the FNS at the beginning of the year.

Eligibility requirements for the application

In order to be considered complete, an application must be:

  • accompanied by a bank account identification document (RIB) for the personal bank account;
  • filled in completely;
  • signed by all applicants of legal age, or by their legal representative.

The FNS will return incomplete applications to the applicant by post.

The applicant must send the completed application to the FNS within 30 days. The postmark serves as proof of the date. If this deadline is not met, the cost-of-living benefit will be denied.

The FNS may request additional information or documents from the applicant.

Income limits

For the application to be accepted, the household's total annual income must not exceed a certain limit.

Total annual income is estimated over a reference period taken as the 12 months preceding the month in which the application is submitted.

The gross monthly income limit (of the average gross income during the reference period) is set at:

  • EUR 2,203.77 for a single person;
  • EUR 3,305.65 for a 2 person household;
  • EUR 3,966.78 for a 3 person household;
  • EUR 4,627.91 for a 4 person household;
  • EUR 5,289.04 for 5 person household;

Consult the full cost of living benefit table for the year 2021.

To determine the income of the household, the following are taken into account:

  • income from any professional activity;
  • replacement income (parental leave allowance, disability pension, etc.);
  • income from movable and immovable assets (rent, stocks, etc.);
  • pensions and annuities;
  • maintenance/support payments;
  • allowances or benefits received from a public organisation, with the exception of:
    • family benefits;
    • back-to-school allowance;
    • maternity allowance.


Amount of the cost-of-living benefit

The amount of the benefit is determined on the basis of the applicant's household, and corresponds to:

  • EUR 1,452 for a single person;
  • EUR 1,815 for a 2 person household;
  • EUR 2,178 for a 3 person household;
  • EUR 2,541 for 4 person a household;
  • EUR 2,904 for a 5 or more person household.

Consult the full cost of living benefit table for the year 2021.

The benefit is exempt from taxes and social security contributions. The benefit is non-transferable and may not be pledged or seized.

Reduced cost-of-living benefit

Applicants whose income exceeds the allocation threshold may receive a reduced cost-of-living benefit.

The amount of this benefit corresponds to the difference between:

  • the amount of the cost-of-living benefit that would normally be paid to an applicant in a comparable situation;
  • the portion of the annual income which exceeds the total annual income threshold.

Allocation of the benefit

The benefit can only be applied for once a year.

This limitation also applies if there is a change in the composition of the applicant's household or income situation.

Up to half of the benefit amount may be withheld to offset claims of the National Solidarity Fund against the beneficiaries.

In case of agreement, it is paid into the applicant's account.


The decision may be challenged before the Steering Committee of the National Solidarity Fund. The appeal must be filed within 40 days of the notification of the decision.


Forms / Online services

Who to contact

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