Belgian citizenship is based on a mixture the principles of Jus sanguinis and Jus soli. In other words both place of birth and Belgian parentage are relevant for determining whether a person is a Belgian citizen. Jus sanguinis (Latin for right of blood) is a right by which nationality or citizenship can be recognised to any individual born to a parent who is a national or citizen of that state. ... Jus soli (Latin for right of the territory), or birthright citizenship, is a right by which nationality or citizenship can be recognised to any individual born in the territory of the related state. ...

In some circumstances citizenship is granted to children born in Belgium to non-Belgian parents. This is not the case where parents are temporary or short term visitors.

Birth in Belgium

A person born in Belgium (to non-Belgian parents) is a Belgian citizen if that person is:

• stateless (i.e. holding no other nationality) at the time of birth OR;
• the person loses any other nationality before turning 18 OR;
• a parent of the person was born in Belgium and has lived in Belgium for at least five years during the 10 years preceding your birth OR;
• the person is adopted (while under 18) by a parent holding another nationality who was born in Belgium and who has had their main place of residence in Belgium for five years during the 10 year period before the adoption takes effect.
• the person has to parents or adoptive parents born abroad who submitted a declaration before that person's twelfth birthday requesting that the person be granted Belgian nationality. Belgium must have been their main place of residence during the 10 years preceding the declaration and the person must have lived in Belgium since your birth.

Effectively this means that:

• the children of long-resident immigrants can acquire Belgian citizenship
• the grandchildren of immigrants to Belgium are normally Belgian by birth

Birth to a Belgian parent

Access to Belgian citizenship depends on one's date of birth:

Before 1 January 1967

Belgian citizenship is acquired by: January 1 is the first day of the calendar year in both the Julian and Gregorian calendars. ... 1967 (MCMLXVII) was a common year starting on Sunday of the Gregorian calendar (the link is to a full 1967 calendar). ...

• the legitimate child of a father who is a Belgian citizen OR;
• a person born outside wedlock who is were acknowledged by your mother who is a Belgian citizen before you were acknowledged by your father.

1 January 1967 to 31 December 1984

Belgian citizenship is acquired by: January 1 is the first day of the calendar year in both the Julian and Gregorian calendars. ... 1967 (MCMLXVII) was a common year starting on Sunday of the Gregorian calendar (the link is to a full 1967 calendar). ... December 31 is the 365th day of the year (366th in leap years) in the Gregorian Calendar. ... 1984 (MCMLXXXIV) was a leap year starting on Sunday of the Gregorian calendar. ...

• birth in Belgium to a Belgian citizen OR;
• birth outside Belgium where the person is the legitimate child of a father who is a Belgian citizen OR;
• birth outside Belgium to a mother who is a Belgian citizen and who was born in Belgium or in Belgian Congo before 30 June 1960 or in Rwanda or Burundi before 1 July 1962.

June 30 is the 181st day of the year (182nd in leap years) in the Gregorian Calendar, with 184 days remaining. ... 1960 (MCMLX) was a leap year starting on Friday (the link is to a full 1960 calendar). ... July 1 is the 182nd day of the year (183rd in leap years) in the Gregorian Calendar, with 183 days remaining. ... 1962 (MCMLXII) was a common year starting on Monday (the link is to a full 1962 calendar). ...

On or after 1 January 1985

Belgian citizenship is acquired by: January 1 is the first day of the calendar year in both the Julian and Gregorian calendars. ... 1985 (MCMLXXXV) was a common year starting on Tuesday of the Gregorian calendar. ...

• birth in Belgium to a Belgian citizen OR;
• you were born abroad AND:
  • 1. the Belgian parent was born in Belgium or in Belgian Congo before 30 June 1960 or in Rwanda or Burundi before 1 July 1962 OR;
  • 2. the Belgian parent was born abroad and makes a declaration, within a period of five years following your birth, requesting that you be granted Belgian nationality. This declaration (declaration d'attribution/toekenningsverklaring) must be submitted to the Belgian embassy or consulate in the main place of residence of the Belgian parent abroad, or the registrar in the parent's municipality (if the parent lives in Belgium). Belgian nationality is obtained on the date upon which the declaration is made.

Where a person is born outside Belgium and the Belgian parent who was born abroad does not submit a "déclaration d'attribution/toekenningsverklaring" within a period of five years following your birth, a late declaration is allowed provided the child does not have another. If the child acquires another nationality before age 18, Belgian nationality is lost. June 30 is the 181st day of the year (182nd in leap years) in the Gregorian Calendar, with 184 days remaining. ... 1960 (MCMLX) was a leap year starting on Friday (the link is to a full 1960 calendar). ... July 1 is the 182nd day of the year (183rd in leap years) in the Gregorian Calendar, with 183 days remaining. ... 1962 (MCMLXII) was a common year starting on Monday (the link is to a full 1962 calendar). ...

Naturalisation as a Belgian citizen

A person may be naturalised as a Belgian citizen after three years residence in Belgium.

• This period is reduced to two years for political refugees and stateless persons.
• Residence abroad can be equated with residence in Belgium if you can prove that you had genuine ties with Belgium during the periods stipulated above.

Normally a person must be aged 18 or over in order to become a naturalised Belgian citizen. Children aged under 18 normally obtain Belgian citizenship automatically at the same time a responsible parent is naturalised.

Where a person is married to a Belgian citizen for over three years, and has held a permit allowing settlement in Belgium for that period, the residence period for naturalisation may be reduced to 6 months.

Belgian citizenship by declaration

This is a simplified form of naturalisation for certain people with special ties to Belgium.

Nationality declaration

From the age of 18 a person can obtain Belgian nationality by signing a nationality declaration if that person meets one of the following criteria:

• born in Belgium and with main place of residence in Belgium, without any interruptions, birth OR;
• you were born abroad to a Belgian citizen parent OR;
• the person has had a main place of residence in Belgium for at least seven years and has an unlimited residence permit or authorisation to settle in Belgium.

The nationality declaration can only be signed in front of the registrar in the applicant's municipality in Belgium. This declaration can not be approved by a Belgian embassy or consulate.

Opting for Belgian nationality between 18 and 22 years of age

A person aged between 18 and 22 can sign a declaration indicating opting for Belgian nationality if that person meets one of the following criteria:

• born in Belgium OR;
• born abroad and one of the person's adoptive parents is a Belgian citizen at the time the declaration opting for Belgian nationality is made OR;
• born abroad and one of the person's parents or adoptive parents was a Belgian citizen when the person was born OR;
• born abroad and with a main place of residence in Belgium with the person's parents or adoptive parents for at least one year before you turned six.

All applicants must also meet the following criteria:

• main place of residence must have been in Belgium during the 12 month period preceding the declaration; and
• main place of residence in Belgium either between the ages of 14 and 18 or for a period of at least nine years. The applicant is exempt from these latter two criteria if one the person's parents or adoptive parents was a Belgian citizen or had previously held Belgian citizenship at the time of the persons's birth.

Residence abroad can be equated with residence in Belgium if you can prove that you have genuine ties with Belgium.

Belgian citizenship by marriage

Since 1 January 1985, marriage does not give any direct claim to Belgian citizenship. January 1 is the first day of the calendar year in both the Julian and Gregorian calendars. ... 1985 (MCMLXXXV) was a common year starting on Tuesday of the Gregorian calendar. ...

Belgian citizenship by adoption

From 1 January 1988, children adopted by Belgian citizens generally acquire Belgian citizenship on the same basis as those born to Belgian citizens. Different rules apply for adoptions completed prior to 1988. January 1 is the first day of the calendar year in both the Julian and Gregorian calendars. ... 1988 (MCMLXXXVIII) was a leap year starting on Friday of the Gregorian calendar. ...

Loss of Belgian citizenship

Belgian citizenship is lost by voluntary acquisition of a foreign citizenship by a person aged 18 or over.

It is also possible to lose Belgian citizenship in the following circumstances

Residence overseas

A Belgian citizen born outside Belgium on or after 1 January 1967 will lose Belgian citizenship at age 28 if: January 1 is the first day of the calendar year in both the Julian and Gregorian calendars. ... 1967 (MCMLXVII) was a common year starting on Sunday of the Gregorian calendar (the link is to a full 1967 calendar). ...

• between the ages of 18 and 28, the person's main place of residence was not in Belgium AND;
• the person holds one or more other nationalities AND;
• the person has not made a déclaration de conservation/behoudsverklaring (declaration stating your intention to retain Belgian nationality) between the ages of 18 and 28.

To avoid losing your Belgian nationality a person not only has to make a déclaration de conservation/behoudsverklaring between the ages of 18 and 28, it also must be made again every 10 years.

Renunciation

A Belgian citizen aged 18 and over may renounce Belgian citizenship by declaration lodged with the Belgian authorities.

Children

A child under 18 will lose Belgian citizenship if a responsible parent loses Belgian citizenship. Exceptions include cases where:

• the child is stateless
• the other parent remains a Belgian citizen

Children aged under 18 also lose Belgian citizenship if adopted by a non-Belgian, and the child acquires another nationality upon adoption. An exception applies if one of the adoptive parents is a Belgian citizen.

A child who has acquired Belgian citizenship on the grounds of being stateless, who acquires another nationality before age 18, loses Belgian citizenship.

Deprivation of Belgian citizenship

Belgian nationality can be withdrawn (déclaration de déchéance/vervallensverklaring) if a person has acquired Belgian citizenship through one of the provisions for those with non-Belgian parents AND the person is "in serious breach" of his or her obligations as a Belgian citizen.

Resumption of Belgian citizenship

A former Belgian citizen (other than a person deprived of citizenship) may resume Belgian citizenship by declaration after a 12 month period of residence. Residence abroad can be equated with residence in Belgium if the person can prove genuine ties with Belgium.

The conditions under which the person lost your Belgian nationality and the reasons for wishing to regain it will be taken into account.

Children aged under 18 automatically acquire Belgian citizenship if a responsible parent resumes Belgian citizenship.

Dual citizenship

There are some circumstances where it is possible to hold Belgian citizenship alongside another citizenship:

• persons who become naturalised Belgian citizens may keep their original nationality if the other country permits it
• children born outside Belgium to Belgian parents who acquire the citizenship of the country of birth (for example, children born in the U.S. to Belgian parents)
• children born with one Belgian and one foreign parent, who acquire both nationalities at birth

External links

• Information on Belgian nationality, Belgian Ministry for Foreign Affairs
• Belgian citizenship: summary of the belgian citizenship law