Level of highest educational attainment (HEAP)

Latest release
Census of Population and Housing: Census dictionary
Reference period
2026

Definition

This variable shows a person’s highest level of education, from either school or nonschool qualifications. It helps build a picture of education levels across Australia and can be used to: 

  • compare results with previous Censuses to understand changes in educational achievement over time 
  • show the general level of education in Australia and in different groups 
  • explore how education levels relate to employment, income and other socioeconomic factors 

Scope

Persons aged 15 years and over 

Categories

Categories for level of highest educational attainment (HEAP)

Question(s) from the Census form

What is the highest year of primary or secondary school the person has completed?

Has the person completed any educational qualification?

What is the level of the highest qualification the person has completed?

What is the main field of study for the person’s highest qualification completed?

How this variable is created

This variable is derived using two other Census variables:  

The process identifies which attainment (school or non-school) is higher. In most cases, this is clear, but some Certificate levels rank below certain secondary education levels. The following decision table is used to resolve these cases. 

Table 1. Derivation of level of highest educational attainment decision table 

Highest year of school completed (HSCP) Certificate nfd* 
(500) 
Certificate III & IV, nfd* 
(510) 
Certificate IV 
(511) 
Certificate III 
(514) 
Certificate I & II, nfd* 
(520) 
Certificate II 
(521) 
Certificate I (524) Level of education inadequately described 
(011) 
Level of education 
not stated 
(&&&) 
Year 12 (1) Inadequately described Certificate III & IV, nfd Certificate IV Certificate III Year 12 Year 12 Year 12 Inadequately described Not stated 
Year 11 (2) Inadequately described Certificate III & IV, nfd Certificate IV Certificate III Year 11 Year 11 Year 11 Inadequately described Not stated 
Year 10 (3) Inadequately described Certificate III & IV, nfd Certificate IV Certificate III Year 10 Year 10 Year 10 Inadequately described Not stated 
Year 9 (4) Certificate level, nfdCertificate III & IV, nfd Certificate IV Certificate III Certificate I & II, nfd Certificate II Certificate I Inadequately described Not stated 
Year 8 or below (5) Certificate level, nfd Certificate III & IV, nfd Certificate IV Certificate III Certificate I & II, nfd Certificate II Certificate I Inadequately described Not stated 
Did not go to school (6) Certificate level, nfdCertificate III & IV, nfd Certificate IV Certificate III Certificate I & II, nfd Certificate II Certificate I Inadequately described Not stated 
Not stated (&) Not stated Certificate III & IV, nfd Certificate IV Certificate III Not stated Not stated Not stated Not stated Not stated 

Note: the number in brackets refer to the classification code used for highest year of school completed (HSCP) and non-school qualification: level of education (QALLP).

*nfd: not further defined 

History and changes

Questions about educational qualifications have been asked in every Census since 1911. The combined measure of school and non-school education, called level of highest educational attainment, was first reported in 2006. 

In 2011, people were given a level of attainment based on their highest year of school completed if they had finished ‘Year 8 or below’ through to ‘Year 12’, or if their certificate was ‘Not further defined’. 

In 2016, people with a highest year of school completed from Year 8 or below to Year 12 and a certificate not further defined were coded as ‘Inadequately described’. 

In 2021, undergraduate certificates were added as a new qualification type. These are coded to ‘Diploma level, nfd’. In earlier Censuses, nothing was coded to this category. 

In 2026, the question about whether a qualification was achieved before 1998 was removed from the paper form, however, where relevant was asked on the online form. While it is still used to derive this variable, the change may lead to a small increase in responses coded to ‘Advanced diploma, diploma level nfd’ and ‘Certificate level nfd’. 

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