Belgium – Citizenship

Who is eligible to apply for citizenship in Belgium?

There are two principal ways an adult can pursue Belgian nationality: through a nationality declaration or through naturalisation. The fundamental difference between the two is that a declaration constitutes a legal entitlement once the relevant conditions are satisfied, whereas naturalisation is a discretionary privilege that the government may grant or withhold. The declaration route has become the dominant mechanism through which foreign nationals obtain Belgian nationality, and naturalisation is now granted only in exceptional circumstances.

Nationality declaration after five years of residence

The most widely used route requires five consecutive years of uninterrupted lawful residence in Belgium, demonstrated proficiency in one of the three national languages (French, Dutch, or German), and evidence of social integration and economic participation. This broadly resembles the standard naturalisation frameworks used in countries such as Germany or the Netherlands, though Belgium allows applicants to substantiate integration through a variety of documentary evidence rather than through a single standardised examination.

Applicants who have been legally resident in Belgium for ten years rather than five must demonstrate knowledge of one of the national languages and provide evidence of participation in the social and economic life of their host community, though the threshold for economic participation may be somewhat lower. To lodge a nationality declaration, you must be at least 18 years of age and hold a permanent residence permit (Cards K or L).

Citizenship by descent

If one or both of your parents held Belgian citizenship at the time of your birth, you acquire Belgian nationality automatically regardless of the country in which you were born. Minors may also obtain Belgian citizenship through acknowledgement — when parentage is formally recognised by a Belgian citizen — or through adoption, with citizenship taking effect on the date of adoption. However, if parentage is acknowledged only after the child has already turned 18, this route will not result in Belgian nationality being granted.

Citizenship via marriage or civil partnership

To acquire Belgian citizenship through marriage to a Belgian citizen using the declaration route, you must have been legally resident in Belgium for a minimum of five years, at least three of which must have been spent cohabiting with your Belgian partner. Adjusted or reduced conditions apply to certain categories of applicant, among them foreign nationals married to Belgian citizens, parents of Belgian minor children, stateless individuals, and elderly or seriously ill persons. Always consult your municipality to determine precisely which documents are required for your individual circumstances.

Naturalisation for exceptional merit

An individual aged at least 18 may seek naturalisation on the grounds of exceptional achievement in the areas of sport, culture, or science that contributes to Belgium’s international standing. Applicants must hold a permanent residence permit, though no fixed period of prior residence is formally stipulated. They must provide evidence of extraordinary accomplishment in scientific, sporting, or sociocultural fields, and must also explain why obtaining Belgian citizenship through the declaration route is effectively impossible for them.

It should be noted that Belgium does not operate any form of direct citizenship-by-investment scheme. It is not possible to acquire a Belgian passport by making a single payment or donation. There are no programmes allowing citizenship or residence to be obtained through real estate purchases. The only avenue available to investors is to establish, acquire, and actively develop a business enterprise within Belgium.

What are the steps involved in applying for citizenship in Belgium?

Since the revision of the Belgian Nationality Code that came into effect on 1 January 2013, the system has been built primarily around the nationality declaration. The process is handled through your local municipal administration (commune/gemeente), which serves as the initial point of contact before transmitting your file to the prosecution service and other relevant authorities. The procedure unfolds as follows:

1. Verify your eligibility and assemble your documents. For your first visit to the civil affairs–nationality desk at your municipality, bring your residence card and birth certificate. If your birth certificate is not issued in Dutch, French, or German, a certified translation will be required. You will also need to present evidence of language proficiency, documentation demonstrating social and economic integration, and any marriage or family documents relevant to the category under which you are applying.
2. Fill in the municipal questionnaire. Most municipalities ask applicants to complete a brief questionnaire — either online or at the counter — to determine which documents apply to their particular situation. Your duration of lawful residence, family and employment circumstances, any disability or invalidity status, and pension status all influence which documents must be submitted.
3. Submit a pre-application and obtain confirmation. You may send a completed questionnaire together with a copy of your residence permit to your municipality’s nationality team. Once your application has been approved at the local level, you can proceed with payment to FPS Finance and arrange a formal appointment to lodge your nationality declaration.
4. Pay the registration fee. The Chamber of Representatives approved an increase in the registration fee for acquiring citizenship from €150 to €1,000 (Programme Law of 18 July 2025). Annual indexation is foreseen. The new rules apply to cases filed after the law’s publication in the Moniteur belge. According to FPS Finance, the payment date — not the submission date — is decisive. Always consult the official FPS Finance website to confirm the current fee prior to applying, as this amount is subject to change.
5. Lodge your formal declaration at the municipality. Once your application file is complete, verified, and payment has been made, you attend the municipality in person to formally submit your nationality declaration. The municipality then forwards your file to the public prosecutor’s office.
6. Police visit and background checks. A police officer will visit your registered address to conduct a personal interview as part of the verification process. The municipal official reviews your application in coordination with the Immigration Office, the public prosecutor’s office, and the Department for National Security.
7. Await the prosecutor’s determination. The public prosecutor’s office will reach a decision on your application within four months and will communicate this to the municipal official. In Brussels, the process may extend to between five and eight months.
8. Receive your confirmation and apply for your identity card. If your application is approved, you will be notified by post and issued a document confirming entry into Belgian citizenship, which is recorded in the National Register. Following this, you will receive an invitation to apply for your Belgian identity card. To obtain your first Belgian ID card, visit the civil affairs–identity desk or a service centre.

For naturalisation applications via the exceptional merit route, once the file is considered complete and the registration fee has been paid, the registrar forwards the application to the Chamber of Representatives. The public prosecutor, the Immigration Office, and State Security are each consulted and have four months in which to submit an opinion. The fee for this route is €1,000, payable upon consideration of the application. Check the official website for the current figure, as fees are subject to annual indexation.

What tests, interviews, or ceremonies are required as part of the citizenship process in Belgium?

Applicants are now required to demonstrate at least B1-level proficiency in one of Belgium’s official languages (French, Dutch, or German) and to pass a separate civics examination covering knowledge of democratic principles, institutional structures, shared values, and the organisation of the Belgian state. These requirements were introduced as part of the 2025 reform. This differs from, for example, the UK’s Life in the UK test or Australia’s citizenship test — both standardised, computer-based assessments taken at designated test centres — as Belgium has historically placed greater emphasis on documentary evidence, though the requirements have been progressively strengthened over time.

Language proficiency can be demonstrated in several ways, including obtaining an official language certificate from an educational institution recognised in Belgium, or presenting a certificate of completion of 400 hours of language training with an approved provider. Completing a social integration course that incorporates language instruction is another accepted pathway. It should be noted that internationally recognised qualifications such as the French DELF may not always be accepted; at least one instance is on record of difficulties arising with a DELF diploma, so it is advisable to confirm with your local authorities that they will recognise a particular qualification before undertaking that examination.

Under the 2025 coalition agreement, the “mandatory integration obligation” for those seeking to obtain or retain long-term residence rights — a prerequisite for citizenship — places emphasis on language proficiency, employment and social integration, and financial self-sufficiency independent of social benefits. Integration evidence is therefore assessed in a holistic manner, not solely on the basis of language certificates.

There is no formal swearing-in ceremony or oath of allegiance required as part of the Belgian nationality declaration process, as exists in countries such as Canada or Australia, where a public ceremony and formal pledge form a statutory element of acquiring citizenship. In Belgium, citizenship takes effect from the date on which the declaration is formally registered, and the procedure is administrative in nature throughout.

What are the benefits of Belgian citizenship?

Belgian citizenship confers the right to vote in all Belgian elections and to stand for public office. These are rights not available to permanent residents for national or regional elections, making them among the most meaningful civic benefits that come with acquiring nationality.

Citizens are entitled to hold a Belgian identity card and a Belgian passport. The Belgian passport permits visa-free travel throughout the EU and ranks among the most powerful travel documents in the world, offering visa-free or visa-on-arrival access to more than 160 countries, including Canada, Australia, Cuba, Indonesia, and the United States. For nationals of non-EU countries in particular, a Belgian passport dramatically expands international mobility well beyond what a residence permit alone allows.

The principal advantage of EU citizenship is the freedom to live, work, and conduct business anywhere across the European Union. Holding Belgian nationality opens the door not only to life in Belgium but to residence and employment in all other EU member states. This is broadly comparable to how Australian citizenship confers certain trans-Tasman rights in New Zealand — though on a considerably larger scale, spanning more than 26 EU countries.

Further benefits include preferential consideration over non-residents for employment across EU countries, access to internationally regarded free education, and eligibility for grants and scholarships in Belgium and other EU member states. Citizens also enjoy comprehensive access to Belgium’s social security system, encompassing healthcare, unemployment support, and pension entitlements, as well as the right to consular protection from Belgian embassies and those of other EU member states when travelling in countries where Belgium maintains no diplomatic representation.

A child under the age of 18 automatically acquires Belgian nationality when one of their parents obtains Belgian citizenship. Becoming a citizen can therefore have immediate and positive implications for your entire family.

Does Belgium allow dual citizenship, or will you have to renounce your existing nationality?

Following legislative changes that came into force on 28 April 2008, Belgian citizens are permitted to voluntarily acquire and hold other citizenships without forfeiting their Belgian nationality. Belgian law therefore fully allows multiple or dual citizenship. This places Belgium among the more permissive countries on this issue — some neighbouring states have historically imposed stricter limitations on dual nationality, and a number of countries outside the EU still prohibit it altogether.

From the Belgian government’s perspective, the only consideration is whether a person holds Belgian citizenship or not; the authorities make no distinction based on any other nationalities that person may hold. There is therefore no formal obligation to declare your other nationalities or to renounce them as a precondition of the Belgian application.

Nevertheless, other countries may not recognise or permit dual citizenship, which could require the renunciation of Belgian nationality — or could trigger the automatic loss of your original nationality under your home country’s legislation. While Belgian citizens may hold dual citizenship, this is ultimately contingent on the rules of the other country involved. It is essential to consult the official immigration or foreign affairs authority of your home country — such as its embassy, consulate, or interior ministry — before applying for Belgian citizenship, so that you fully understand whether acquiring Belgian nationality will have any consequences for your existing passport.

Being born with another citizenship has never resulted in the loss of Belgian nationality. It has therefore always been possible to hold Belgian citizenship concurrently with other citizenships acquired at birth.

How long does it typically take to become a citizen of Belgium?

The realistic timeframe for obtaining Belgian citizenship depends considerably on your route and personal circumstances. For most people arriving as workers, students, or family members with no prior Belgian connections, the journey typically unfolds as follows:

• Years 1–5: Accumulate continuous lawful residence in Belgium under a valid permit. After five years of uninterrupted legal residence, you can apply for a permanent residence card (long-term EU resident status). During this period, absences from Belgium must generally be kept to fewer than six consecutive months at any one time, and no more than one year in total.
• At five years: If you have been legally resident in Belgium for at least five years and hold a permanent residence permit (K or L card), you may be eligible to submit a citizenship declaration of nationality.
• Application processing: Processing time is influenced by your individual circumstances and the municipality where you submit your application. In most parts of the country, a decision is reached within four months, though in Brussels it may take between five and eight months.
• After approval: Once notified, you can apply for your Belgian identity card, which takes approximately two weeks to issue, and your Belgian passport, which takes approximately three weeks.

In total, the procedure from submission takes up to six months. This means that the realistic minimum timeline from first arriving in Belgium to holding a Belgian passport is approximately five and a half to six years, assuming continuous residence and a straightforward application. Those who require ten years of residence — for instance, individuals not in employment and not married to a Belgian — should plan their timeline accordingly.

Always verify current processing times with your municipal office or the FPS Justice citizenship pages, as these figures can shift over time.

What are the main reasons an application for citizenship in Belgium might be refused?

Belgium’s nationality declaration is a legal entitlement when all conditions are fulfilled, but applications can and do result in refusals when those conditions are not adequately satisfied. Common grounds for a negative outcome include:

• Insufficient or broken residency. Any significant interruption to lawful residence during the qualifying period may render an application ineligible. Absences from Belgium must generally be kept to fewer than six consecutive months at any one time, and no more than one year in total throughout the qualifying period.
• Failure to establish language proficiency. Applicants must demonstrate at least B1-level proficiency in one of Belgium’s official languages and pass a separate civics examination. Inadequate or unaccepted evidence of language ability is a frequent cause of refusal.
• Inadequate social integration evidence. Applications have been refused due to insufficient proof of social integration. Gaps may include missing documentation of language course participation, community involvement, or employment records.
• Criminal record or national security concerns. The municipal official reviews applications in collaboration with the Immigration Office, the public prosecutor’s office, and the Department for National Security. Serious criminal convictions or adverse findings from security services may lead to refusal.
• Incomplete documentation. Missing, untranslated, or unlegalized documents are a practical — and avoidable — source of delays and rejections.
• Fraud or misrepresentation. Belgian citizenship can be withdrawn if it was obtained by fraudulent means or through the provision of false information, such as entering into a sham marriage.

Is there an appeals process?

If your citizenship application is refused, you have the right to appeal. For nationality declaration applications, you should lodge your appeal with the family court within 15 days of receiving the decision. If a naturalisation application is rejected, you have one month to submit an appeal to the Naturalisations Committee by letter. Given the complexity of Belgian nationality law, consulting a qualified Belgian immigration lawyer before or during the process is strongly advisable.

Where can you find reliable, up-to-date information about citizenship in Belgium?

Belgian nationality law is regulated by the Belgian Nationality Code and has undergone numerous amendments. Requirements, fees, and procedures are subject to regular change — as demonstrated by the significant fee increase and language requirement reforms introduced in 2025. You should always consult official government sources rather than relying on general websites, online forums, or outdated guides.

• FPS Justice – Citizenship: The Federal Public Service Justice is the primary authority responsible for the Belgian Nationality Code. Their citizenship pages provide detailed guidance on every route to nationality and are available in French, Dutch, and German. Visit: justice.belgium.be – Citizenship
• FPS Foreign Affairs – Nationality Department: For those residing abroad or with questions relating to citizenship by descent, the Federal Public Service Foreign Affairs provides dedicated guidance. Visit: diplomatie.belgium.be – Nationality
• Your local municipality (commune/gemeente): All nationality declarations are submitted through your local municipal office, which will provide a tailored document checklist for your circumstances. This is the most important practical point of contact for any active application.
• FPS Finance – Fee payments: The registration fee is paid to FPS Finance. Always confirm the current fee before submitting your application: finance.belgium.be
• Immigration Office (Office des Étrangers / Dienst Vreemdelingenzaken): For questions regarding your legal residence status, which forms the foundation of citizenship eligibility: dofi.ibz.be

Official government websites remain the only dependable source for current requirements, fees, and processing times. Belgian citizenship requirements have changed on multiple occasions in recent years and further amendments are anticipated, so always verify information directly with the relevant authority rather than relying on third-party summaries, including this article.

Frequently asked questions

Do children born in Belgium to foreign parents automatically receive Belgian citizenship?

A child born in Belgium to foreign parents is entitled to Belgian nationality if they hold no other nationality before reaching the age of 18, if they lose their nationality before turning 18 and thereby become stateless, or if one of their parents was also born in Belgium and had been residing there for at least five years prior to the child’s birth. The mere fact of being born on Belgian soil to two foreign parents does not, in itself, automatically confer citizenship — the specific circumstances of each case are of considerable importance.

Can Belgian citizenship be lost or revoked?

Belgian nationality may be lost through renunciation, deprivation, extended residence abroad under specific conditions, or in certain cases involving children. A Belgian citizen can be stripped of their nationality if it was acquired through fraud or the submission of false information, or if they are found to be in serious violation of their obligations as a citizen. Loss of nationality as a result of prolonged residence abroad applies under particular conditions that do not affect most expatriates living outside Belgium on a temporary basis.

What happens to my application if I move abroad during the process?

One of the fundamental preconditions for lodging a nationality request with the Belgian authorities is that the applicant must have their principal place of residence in Belgium. If you relocate permanently to another country after submitting your declaration, your application is likely to be adversely affected or refused outright, since Belgian residence is a core requirement throughout the process. You should always notify your municipality promptly of any material change in your circumstances during a pending application.

Does being married to a Belgian automatically entitle me to citizenship?

No. Marriage to a Belgian citizen does not confer citizenship automatically. You must have been legally resident in Belgium for a minimum of five years, spent at least three of those years cohabiting with your Belgian spouse, demonstrate knowledge of one of the national languages, and provide evidence of social integration. Marriage functions as a supporting element within the declaration route rather than an independent shortcut to nationality.

Will my minor children automatically become Belgian when I do?

Any child under the age of 18 automatically acquires Belgian nationality at the point when one of their parents is granted Belgian citizenship. This takes effect at the time the parent’s nationality is formally conferred, provided the child has not yet reached adulthood. Should your child turn 18 before your application is concluded, they will be required to apply for citizenship in their own right.

Is there a Belgian citizenship test similar to the UK’s “Life in the UK” test?

Applicants must now demonstrate at least B1-level proficiency in one of Belgium’s official languages and pass a separate civics examination covering knowledge of democratic principles, institutional structures, shared values, and the organisation of the Belgian state. The system is more flexible than the UK’s single standardised test, in that language proficiency may be evidenced through a variety of means including official certificates and completed integration courses — however, a civics examination is now a formal requirement following the 2025 reform.

Can I reclaim Belgian citizenship if I previously held it and lost it?

A Belgian citizen aged at least 18 may renounce their Belgian nationality by submitting a declaration of renunciation, but this only takes effect if they hold or are on the point of acquiring another citizenship. Those who have lost Belgian nationality may, in certain circumstances, submit a declaration of recovery. An individual who previously renounced Belgian nationality must set out the circumstances surrounding the renunciation and explain their reasons for wishing to recover it, and the Crown Prosecutor retains some discretion to approve or decline such requests.

Does Belgium have a golden visa or citizenship-by-investment programme?

Belgium does not operate any direct citizenship-by-investment programme. It is not possible to acquire a Belgian passport through a one-time financial payment or donation. This position is consistent with broader European Commission concerns that “golden passport” schemes may pose security risks and facilitate tax evasion. Investors wishing to obtain Belgian citizenship must proceed through the standard residency and nationality route in the same way as any other applicant.

How many people acquire Belgian citizenship each year?

Approximately 30,000 to 40,000 people acquire Belgian nationality each year. In 2020, the figure stood at 32,663. According to Belgium’s statistical office, nearly 6,000 foreign nationals obtained Belgian citizenship in September 2025 alone. These numbers reflect the accessibility of the declaration route for long-term residents who satisfy the relevant conditions.

What is the difference between a declaration of nationality and naturalisation in Belgium?

The essential distinction is that a declaration of nationality is a legal right that arises automatically once the applicable conditions are met, whereas naturalisation is a discretionary privilege that the government may grant or withhold. Naturalisation is reserved for applicants who have made exceptional contributions that reflect positively on Belgium — whether in the scientific, sporting, or cultural and social sphere. The naturalisation pathway has been declining steadily, accounting for only 0.4% of all nationality changes in 2023.