Income
Individual income quartiles
About this topic
Individual income quartiles group people aged 15 years and over into four evenly sized income ranges so the distribution of personal income can be compared objectively across areas and over time. The quartile method focuses on relative position in the income distribution rather than raw dollar brackets.
This topic is useful because direct income amounts are affected by inflation and wider economic change. Quartiles provide a clearer way to compare whether an area is becoming relatively lower, middle, or higher income over time.
Interpretation notes
- This is a derived distribution of personal income for people aged 15 years and over, with each quartile representing a quarter of the income distribution.
- Quartiles show relative position rather than fixed dollar brackets, which makes them more robust for comparisons over time.
Key insight
In 2021, the lowest income quartile held the largest share among residents aged 15 and over in Gosnells (C), accounting for 28.9%.
Section overview
Individual income quartiles
Gosnells (C) - Persons aged 15+ (Usual residence)
This table summarises individual income quartiles for Gosnells (C) in 2021 for persons, with comparison against Greater Perth and change since 2016.
Chart view
Individual income quartiles snapshot
2021 distribution by category for Gosnells (C), with comparison markers for Greater Perth.
Lowest group
2021 count
26,815
% of total
28.9%
Change from 2016
+1.0pp
26,815
28.9%
+1.0pp
Medium lowest
2021 count
22,953
% of total
24.7%
Change from 2016
+2.2pp
22,953
24.7%
+2.2pp
Medium highest
2021 count
23,952
% of total
25.8%
Change from 2016
+0.3pp
23,952
25.8%
+0.3pp
Highest group
2021 count
19,108
% of total
20.6%
Change from 2016
-3.6pp
19,108
20.6%
-3.6pp
Individual income quartiles change
Absolute change in category counts between 2016 and 2021.
Lowest group
+2,876
+1.0pp
Medium lowest
+3,613
+2.2pp
Medium highest
+2,082
+0.3pp
Highest group
-1,645
-3.6pp
Data table
Individual income quartiles for Gosnells (C). Individual income quartiles. 2021 and 2016 counts, percentages, and change compared with Greater Perth.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Greater Perth% | Count | % | Greater Perth% | Count | pp | |
| Lowest group | 26,815 | 28.9% | 24.6% | 23,939 | 27.9% | 24.5% | +2,876 | +1.0pp |
| Medium lowest | 22,953 | 24.7% | 23.2% | 19,340 | 22.5% | 21.6% | +3,613 | +2.2pp |
| Medium highest | 23,952 | 25.8% | 23.5% | 21,870 | 25.5% | 22.7% | +2,082 | +0.3pp |
| Highest group | 19,108 | 20.6% | 28.7% | 20,753 | 24.2% | 31.2% | -1,645 | -3.6pp |
| Total persons aged 15+ | 92,828 | 100.0% | 100.0% | 85,902 | 100.0% | 100.0% | +6,926 | 0.0pp |