Family reunification in Luxembourg: conditions, beneficiaries and procedure

Who can bring their family to Luxembourg?

Family reunification allows a resident to bring over their spouse or registered partner (partenaire enregistré) and their minor children, and sometimes other relatives. A third-country national needs a residence permit of at least one year with a prospect of long-term residence, in principle twelve months of lawful residence, sufficient resources, suitable housing and health insurance.

The application is submitted to the General Directorate of Immigration. The pathway depends in particular on your status: the applicable regime differs according to whether the sponsor is an EU citizen or a third-country national.

Definition: family reunification

Family reunification is the procedure by which a person already lawfully established in Luxembourg, known as the 'sponsor', obtains entry and residence for certain members of their family who have remained abroad. It is not an automatic right for all relatives: the law determines exhaustively the persons who are eligible and the conditions that the sponsor must meet.

The legal framework clearly distinguishes two situations that must never be confused: the family member of an EU citizen (or of a Luxembourg national), who falls under the rules on freedom of movement; and the family member of a third-country national, who falls under the provisions on family reunification proper.

These two regimes are subject to different conditions, formalities and documents. Most of the resource and housing conditions described below concern a sponsor who is a third-country national.

Who can be a sponsor and who can join the sponsor

Who can be a sponsor. Broadly speaking, the following may submit an application: the EU citizen (or Luxembourg national) who exercises their right of residence in Luxembourg, for family members who are third-country nationals; the third-country national holding a residence permit in Luxembourg, provided that they show a well-founded prospect of obtaining a long-term right of residence and meet the conditions on resources, housing and insurance; the beneficiary of international protection, under a particular regime that is more favourable as regards the housing and resource conditions where the application is submitted within a certain period after the status is granted.

Who can join the sponsor (third-country national sponsor). Under the law of 29 August 2008, the notion of family member includes in particular: the sponsor's spouse or registered partner, this spouse or partner having to be aged over 18 at the time of the application (reunification of a spouse is not allowed in the case of a polygamous marriage, if the sponsor already has a spouse living with them in Luxembourg); the unmarried children under 18 of the sponsor and/or of their spouse or partner, of whom they have custody and who are dependent on them, the agreement of the other holder of custody rights being required in the case of shared custody; the first-degree direct ascendants (father and mother) of the sponsor or of their spouse, where they are dependent and deprived of the necessary family support in their country of origin; the unmarried adult children of the sponsor or of their spouse, who are objectively unable to provide for their own needs because of their state of health.

Additional categories exist for the beneficiary of international protection, in particular for the unaccompanied minor (direct ascendants and, with ministerial authorisation, the legal guardian or another relative).

Legal framework

The cornerstone is the amended law of 29 August 2008 on the free movement of persons and immigration, which transposes, among others, Directive 2003/86/EC on the right to family reunification and Directive 2004/38/EC on the free movement of EU citizens. The conditions for a third-country national sponsor are set out in article 69 of that law.

The assessment of suitable housing refers to the law of 20 December 2019 on the criteria of salubrity, hygiene, safety and habitability for dwellings and rooms let or made available for residential purposes. The level of resources is measured by reference to the minimum social wage for an unskilled worker, the amount of which changes with the social parameters published by the administration.

The competent authority is the General Directorate of Immigration of the Ministry of Home Affairs. Consolidated texts are published on Legilux, and detailed procedures on Guichet.lu.

Conditions for third-country national sponsors

For a non-EU sponsor, the law imposes four cumulative conditions, to which are added the eligibility of the family member and, where relevant, parental consent. The table of conditions below details each requirement and the risk if it is not met.

The prospect of long-term residence requires the sponsor to show a well-founded prospect of obtaining a long-term right of residence; the sponsor must also hold a residence permit of at least one year and show twelve months of lawful residence in Luxembourg, unless exempt (in particular EU Blue Card holders, transferred employees and researchers). The stable, regular and sufficient resources (salaries, fees or income from assets) must make it possible to provide for the needs of the household without recourse to social assistance, assessed by reference to the minimum social wage for an unskilled worker over twelve months, with a forward-looking assessment over the year following the application. The suitable housing must comply with the statutory criteria of salubrity and habitability (minimum floor area, natural light, heating, running water, electricity). The health insurance must cover the sponsor and each family member.

In some cases, the minister may give a favourable decision even where the level of resources is not strictly met, taking into account the stability of employment, the trend in income or ownership of the housing. This depends in particular on the individual assessment of the application.

Applying for family reunification: the procedure step by step

For a third-country national sponsor, the procedure comprises two consecutive steps.

Before entry into Luxembourg. The sponsor puts together the file on behalf of the family member. Since 1 October 2026, the family member living abroad applies for a long-stay visa (type D) at the embassy of Luxembourg or, failing that, of Belgium competent for them, appearing there in person; this visa, valid for six months, replaces the temporary residence authorisation formerly issued by the General Directorate of Immigration, including for nationals exempt from a short-stay visa. The decision on the reunification application must in principle be taken within a period of nine months at most, which may be extended in exceptional cases linked to the complexity of the case. Applications submitted up to 30 September 2026 are still processed under the former procedure.

After arrival in Luxembourg. Within three business days of arrival, the family member makes a declaration of arrival to the commune administration of their place of residence. Where relevant, they undergo the required medical check (and tuberculosis screening for certain age groups). Finally, they apply for the 'family member' residence permit, which is issued after verification; the first permit is generally valid for one year and renewable for as long as the conditions continue to be met.

For the family member of an EU citizen, the logic differs: the person goes, within three months of arrival, to the commune administration to apply for a residence card for a family member of an EU citizen, any entry visa being issued free of charge.

Documents: indicative checklist

The exact list varies according to the family relationship and the circumstances. As a guide, the file of a third-country national sponsor generally includes the documents set out in the checklist below: a copy of the family member's passport, proof of the family relationship, criminal record, proof of resources over twelve months, proof of suitable housing, health insurance, parental authorisation where relevant and proof of the bank transfer of the fee.

Documents issued abroad may have to be translated and legalised or apostilled. Check the up-to-date list on Guichet.lu and the explanatory note of the General Directorate of Immigration.

Timescales

Processing of the reunification application: in principle nine months at most; failure to respond within this period may amount to an implied rejection, subject to extension for complex cases.

D visa: since 1 October 2026, it replaces the temporary residence authorisation and is valid for six months to enter the territory. Declaration of arrival: within three business days following arrival.

Initial validity of the residence permit: generally one year, renewable; particular cases (for example, a family already formed in another Member State) may give rise to a permit of longer duration.

Autonomous residence: the right to an autonomous residence permit, independent of the sponsor, is acquired after five years of residence at the latest, or earlier in the event of a breakdown of the shared life in particularly difficult circumstances, in particular domestic violence. Actual administrative timescales may vary depending on how complete the application is and the volume of applications.

Costs

The procedure requires payment of a chancery fee for each residence permit, to be paid by bank transfer to the General Directorate of Immigration. Depending on the case, there are also visa fees, sworn translation costs, and the costs of legalising or apostilling foreign documents, as well as any advisory fees.

As the applicable amounts change, the exact rate must be checked on Guichet.lu at the time of filing. This article does not set any price.

Risks and common mistakes

The matrix below cross-references likelihood and impact for the main risks: refusal for insufficient resources (a frequent ground for rejection), incomplete application, a family relationship that is out of scope, absence of parental consent, implied rejection for failure to respond within the period, or housing judged non-compliant. Each risk comes with a preventive measure.

Common mistakes. Confusing the 'family member of an EU citizen' regime with the 'family reunification of a third-country national' regime. Underestimating the resources requirement and filing without documents covering the twelve months required. Forgetting the notarised authorisation of the parent who remained abroad for a child in shared custody. Neglecting health insurance or presenting incomplete cover. Letting the three-business-day deadline for the declaration of arrival after entry pass. Presenting foreign documents that have been neither translated nor legalised or apostilled. Believing that all relatives are eligible, when the law defines the beneficiaries exhaustively.

Three practical cases

Case 1: spouse of an employee who is a third-country national. An engineer holding an employed worker residence permit wishes to bring over his wife. He shows stable employment, resources reaching the legal benchmark, compliant housing and insurance. The file is put together before the entry of the wife, who applies for a long-stay visa (type D) at the competent embassy; then follow the declaration of arrival and a one-year 'family member' residence permit. The permit also allows her to work in Luxembourg.

Case 2: minor children. A resident wants to bring over her two children, aged 8 and 12. The father lives abroad and exercises a right of access. In addition to proof of resources, housing and insurance, she must produce the judgment granting her custody and, if custody is shared with the father, his notarised authorisation confirming his agreement to the children settling in Luxembourg. Without this agreement, where it is required, the application concerning the children may be blocked.

Case 3: refusal for insufficient resources and appeal. An applicant receives a refusal based on resources judged insufficient. Several routes are available: an informal appeal (recours gracieux) to the minister (General Directorate of Immigration) and/or a contentious appeal (recours contentieux) before the administrative court (tribunal administratif) within three months of notification of the decision. The application can be strengthened by demonstrating the stability of employment, the trend in income or ownership of the housing, factors that the minister may take into account. The advisability and strategy of an appeal depend in particular on the precise grounds of the decision and the applicable deadlines.

Comparison of the regimes

The comparison table below sets side by side the three configurations of sponsor: EU citizen, third-country national and EU Blue Card holder. It covers the legal basis, the prior length-of-residence condition, the resource and housing conditions, the entry formality and the family member's access to the labour market.

This table is an explanatory summary; the exact situation depends on the individual case. The holder of an EU Blue Card benefits from a facilitated regime, with exemption from the minimum length-of-residence condition and the possibility of attaching the family members' application to their own.

Decision tree

Is the sponsor an EU citizen or a Luxembourg national? If so, the 'family member of an EU citizen' regime applies and the residence card must be requested from the commune. If not, go to the next question.

Is the sponsor a beneficiary of international protection? If so, a particular regime applies, with lighter housing and resource conditions depending on the period within which the application is made. If not, go to the next question.

Does the sponsor hold an EU Blue Card, or have the status of researcher, transferred worker or long-term resident of another Member State? If so, a facilitated regime applies, with exemption from the minimum length of residence. If not, go to the next question.

Does the family member fall into an eligible category (such as an adult spouse or a minor child)? If not, the application is out of scope. If so, final question. Are the conditions on resources, housing and insurance met? If so, submit the application (D visa since 1 October 2026). If not, strengthen the application before any filing.

Cerno Law Firm's takeaway

Family reunification in Luxembourg follows a clear but demanding structure, in which the status of the sponsor governs the whole process. For the third-country national, success depends on anticipation: documented resources, compliant housing, full insurance and documents in order.

As the numerical thresholds and the formalities change, checking the official sources at the time of filing remains essential. In the event of refusal, remedies are available and deserve a case-by-case assessment. The Immigration department of Cerno Law Firm supports residents in putting together the file, in analysing their situation and, where relevant, in any appeals. For a personalised review, speak with the firm's immigration team.