Belgian Citizenship: Requirements and How to Apply in 2026
Belgian citizenship can offer long-term residents greater security and full participation in Belgian public life. However, the rules depend on an applicant’s age, place of birth, family situation and length of legal residence.
Belgian nationality law is governed at the federal level. Adults generally acquire citizenship through a nationality declaration, while naturalization is reserved for exceptional cases. Some children can also acquire Belgian citizenship automatically under specific legal conditions.
Belgian Citizenship for Children
Children do not automatically become Belgian simply because they are born in Belgium. Their eligibility depends on factors such as their parents’ nationality, place of birth and residence history.
A child with a Belgian parent generally acquires Belgian nationality at birth if the legal conditions are met. For a child born abroad to a Belgian parent who was also born abroad, additional steps may be required.
Children born in Belgium to foreign parents may qualify under specific conditions, including certain long-term residence requirements. Parents should check the rules with their municipality because the procedure varies according to the child’s circumstances.
Belgian Citizenship for Adults
Most adults apply through a nationality declaration submitted to the municipality where they have their main residence. The main eligibility routes include the following.
1. Five Years of Legal Residence
Applicants who have lived legally in Belgium for at least five years may qualify if they also meet the required language, social integration and economic participation conditions.
Social integration can be demonstrated through recognized education, qualifying vocational training or an approved integration program. Applicants using the standard five-year route must also provide evidence of the required economic participation.
2. Ten Years of Legal Residence
People who have lived legally in Belgium for at least ten years may qualify through another route. They must demonstrate knowledge of one of Belgium’s three national languages Dutch, French or German and show participation in the life of their local community.
3. Marriage to a Belgian Citizen or a Belgian Child
Certain applicants may qualify after five years of legal residence if they are married to a Belgian citizen and have lived together in Belgium for the required period, or if they are the parent of a minor Belgian child.
Marriage alone does not automatically grant Belgian citizenship. Applicants must meet the other legal conditions for their specific category.
4. Exceptional Naturalization
Naturalization is different from the standard nationality declaration. It is an exceptional measure decided by the Belgian Chamber of Representatives, not an automatic right based on years of residence.
It is generally intended for people who can demonstrate exceptional merit for Belgium in areas such as science, sports or sociocultural achievements, subject to the legal conditions.
Belgian Citizenship Fees in 2026
The registration fee for acquiring Belgian nationality was set at 1,000 euros on July 29, 2025, and is indexed annually on January 1. The exact amount payable in 2026 should therefore be checked with the Federal Public Service Finance or the applicant’s municipality.
Additional expenses may include translations, copies of official records and other required documents.
Applicants should prepare their paperwork carefully. Missing documents or failure to meet the relevant conditions can delay the process or lead to a negative decision.
Can You Keep Your Original Nationality?
Belgium generally allows dual or multiple citizenship. People who become Belgian citizens do not normally have to give up their original nationality under Belgian law.
However, their country of origin may have different rules. Applicants should check with the relevant embassy or consulate to confirm whether acquiring Belgian citizenship affects their existing nationality.
Where to Apply?
Adults should contact the civil registry office of the municipality where they have their main residence. The municipality can explain which legal route applies, which documents are required and what fee must be paid.
Because citizenship rules depend on personal circumstances, applicants should confirm the latest requirements before filing their application.
