Declarations of legal cohabitation

Legal cohabitations are rather stable in 2018

Population
Legal cohabitations are rather stable in 2018

With 38,921 new declarations in 2018, legal cohabitations are rather stable (-0.3 % compared to 2017). However, terminations of legal cohabitations are on the rise (+4.4 %).

There is a slight increase in the average duration of cohabitation: from 4.3 years in 2017 to 4.6 years the following year. Marriage remains the first cause of legal cohabitation termination.

Most couples are formed around the age of 30

In 2018, it is still around the age of thirty that single partners enter into legal cohabitation for the first time, on average at 31.4 years for the first cohabitant and 29.4 years for the second. The age difference in the couple does not vary: 2 years

Evolution
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Legal cohabitation declarations
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Evolution of the number of legal cohabitation declarations per year and administrative unit, since 2000

Administrative unit Year
2000 2005 2010 2015 2017 2018
Belgium 2,694 15,513 36,962 40,770 39,038 38,921
Brussels-Capital Region 121 1,594 2,957 3,125 2,817 2,803
Flemish Region 2,040 7,569 21,928 23,335 23,332 23,098
Walloon Region 533 6,350 12,077 14,310 12,889 13,020
Legal cohabitation terminations
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Evolution of the number of legal cohabitation terminations per year and administrative unit, since 2000

Administrative unit Year
2000 2005 2010 2015 2017 2018
Belgium 111 3,299 13,487 22,227 24,764 25,852
Brussels-Capital Region 5 271 909 1,340 1,383 1,412
Flemish Region 83 1,909 7,779 13,326 15,017 15,785
Walloon Region 22 1,039 4,472 7,099 7,966 8,310