Luxembourg citizenship: the complete naturalisation guide

Becoming Luxembourgish · Nationality law

Luxembourg allows dual nationality and offers several routes to citizenship, the most common being naturalisation after a qualifying period of residence. This guide explains the routes, the residence and language conditions, the civic course, the documents and the procedure, so you can plan your path to a Luxembourg passport with confidence.

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Routes to Luxembourg citizenship

• Naturalisation after a qualifying period of lawful residence, the main route for long-term residents.
• Option, a simplified route open to specific situations defined by law, such as certain durations of residence or family links.
• Recovery or reclaiming of nationality for people with a Luxembourgish ancestor, under the conditions set by law.

Luxembourg permits dual nationality, so acquiring Luxembourgish citizenship does not, on the Luxembourg side, require renouncing your existing nationality. Check your country of origin's own rules separately.

Naturalisation: core conditions

• Residence. A qualifying period of lawful residence in Luxembourg, continuous up to the application under the conditions in force.
• Luxembourgish language. Proof of spoken Luxembourgish at the required level, evidenced by the official assessment.
• Civic course. Completion of the "Living together in the Grand Duchy of Luxembourg" course, or an equivalent recognised by law.
• Good standing. A clean criminal record consistent with the legal requirements.

Because residence duration and language requirements are set by law and updated over time, we confirm the conditions that apply to your exact situation before you file.

The Luxembourgish language requirement

The language condition focuses on spoken Luxembourgish at the level set by law, assessed through the official "Sproochentest". Written fluency is not the test; the spoken assessment is. For many applicants this is the part that needs the most preparation, and we point you to the right preparation path.

The civic course

The "Vivre ensemble au Grand-Duché de Luxembourg" course covers the fundamentals of Luxembourg's institutions, rights and civic life. Completing it, or holding a recognised equivalent, is a condition of naturalisation.

Documents typically required

• Valid passport and proof of identity.
• Proof of lawful residence over the qualifying period.
• Language assessment certificate and civic course certificate.
• Birth certificate and, where relevant, family documents, with apostille and certified translation.
• Criminal record extracts as required.

The procedure step by step

1. Eligibility review. We confirm your residence period, language and civic standing against the conditions in force.
2. Preparation. Language assessment and civic course completed, civil-status documents legalised and translated.
3. Filing. The application is submitted to the competent authority with the complete file.
4. Review and decision. The file is examined and, once granted, your acquisition of nationality is registered.

Realistic timelines

The path to citizenship is measured in the residence years that precede it, plus the time to prepare the language and civic conditions and to process the file. The strongest applications are planned years ahead, with the language assessment and document legalisation handled early. We help you map the timeline from where you are today.

From residence to citizenship

Most applicants reach naturalisation after building continuous residence on a work permit or EU Blue Card, often via EU long-term resident status. Keeping your residence continuous and lawful throughout is what makes the citizenship application possible, so each renewal matters. If a decision is refused, an immigration lawyer can handle the appeal.

Common mistakes to avoid

• Assuming written language fluency is required, when the test is spoken.
• Gaps or irregularities in the residence record.
• Leaving civil-status legalisation and translation to the last moment.
• Using outdated residence-duration assumptions instead of the current law.

How immigrate.lu supports your naturalisation

immigrate.lu is an immigration advisory house. We review eligibility, plan the language and civic steps, prepare and legalise the civil-status file, and guide the application, while reserved legal acts are handled by our partner lawyer.

immigrate.lu is an immigration advisory house published by Financial Services Luxembourg SARL-S. Reserved legal acts are handled by Maître Cora Maglo, avocate à la Cour (CERNO Law Firm), Luxembourg Bar.