Residency analysis

The aim of the residency analyses is to determine which of the persons who have their main residence in Austria on the reference date 31st October 2021 are counted and which have to be excluded. The legal basis for that analysis can be found in article 5 sections 3–6, and in article 7 sections 2 and 3 of the Register-based Census Act.

There are five reasons for excluding persons, who have their main residence in Austria, from the census:

  • The person has died before the reference date, but still shows up in the Central Population Register (CPR) for that date.
  • Multiple counting of persons on the reference date: persons are recorded with two or more main residences in the CPR by accident.
  • Persons, who according to article 7 section 3, are subject to the 90-days-rule: the reasoning behind this rule is to link the population number to a minimum stay in Austria. Persons, who were registered less than 90 days with their main residence in Austria around the reference day do not belong to the resident population.
  • Persons, who according to article 7 section 2, are subject to the 180-days-rule, are counted in a different municipality than they were registered in at that date. This rule aims to avert the so-called "census tourism": it declares that persons, who were registered in a municipality not longer than 180 days around the reference date and in another one before and after that date (i.e. in the same municipality before and after), are not counted in the municipality they were registered in around the reference date, but in the other one.
  • Cases of possible discrepancies without a main residence, according to article 5 of the Register-based Census Act: persons, who are only recorded in the CPR and in no other administrative register, are excluded from the census if they do not confirm their main residence in the course of an enquiry by letter, and additionally cannot be confirmed by the municipalities as erroneous non-recognitions ("nominal members").