Income
Household income quartiles
About this topic
Household income quartiles group households into four evenly sized income ranges so relative income position can be compared across places and across Census years. They provide a distribution view of household income rather than a simple count in fixed dollar brackets.
This topic is useful because raw household income amounts are influenced by inflation and broader economic shifts. Quartiles make it easier to see whether an area's households are concentrated toward lower, middle, or higher income positions over time.
Interpretation notes
- This is a derived distribution of total household income, so each quartile shows relative position rather than a fixed income bracket.
- It is useful for over-time comparison because quartile groupings are less distorted by inflation than raw dollar bands.
Key insight
In 2021, the medium-low household income quartile held the largest share among households with income in Aldinga Beach, accounting for 29%.
Section overview
Household income quartiles
Aldinga Beach - Households (Enumerated)
This table summarises household income quartiles for Aldinga Beach in 2021 for persons, with comparison against Onkaparinga (C) and change since 2016.
Household income quartiles snapshot
2021 distribution by category for Aldinga Beach, with comparison markers for Onkaparinga (C).
Lowest group
2021 count
994
% of total
26.6%
Change from 2016
-
994
26.6%
-
Medium lowest
2021 count
1,083
% of total
29.0%
Change from 2016
-
1,083
29.0%
-
Medium highest
2021 count
997
% of total
26.7%
Change from 2016
-
997
26.7%
-
Highest group
2021 count
657
% of total
17.6%
Change from 2016
-
657
17.6%
-
Chart view
Household income quartiles change
Absolute change in category counts between 2016 and 2021.
Lowest group
-
-
Medium lowest
-
-
Medium highest
-
-
Highest group
-
-
Data table
Household income quartiles for Aldinga Beach. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Onkaparinga (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Onkaparinga (C)% | Count | % | Onkaparinga (C)% | Count | pp | |
| Lowest group | 994 | 26.6% | 24.5% | 832 | 24.6% | 23.5% | - | - |
| Medium lowest | 1,083 | 29.0% | 27.0% | 1,000 | 29.6% | 27.0% | - | - |
| Medium highest | 997 | 26.7% | 26.4% | 933 | 27.6% | 27.1% | - | - |
| Highest group | 657 | 17.6% | 22.1% | 614 | 18.2% | 22.4% | - | - |
| Total Households | 3,731 | 100.0% | 100.0% | 3,379 | 100.0% | 100.0% | - | - |