Pacsé, we contribute according to our abilities

Case law
About Bat info source: AFP

Although the PACS presupposes joint ownership, the accommodation acquired can be paid for by one person, said the Court of Cassation. Because if the conclusion of a PACS creates an indivision in half on the goods which are not the exclusive property of one or the other, it also obliges, unless otherwise agreed, to material aid and proportional assistance to each person's faculties.