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-high household income quartile held the largest share among households with income in Wanneroo (C), accounting for 29%.

Section overview

Household income quartiles

Wanneroo (C) - Households (Enumerated)

This table summarises household income quartiles for Wanneroo (C) in 2021 for persons, with comparison against Greater Perth and change since 2016.

Household income quartiles snapshot

2021 distribution by category for Wanneroo (C), with comparison markers for Greater Perth.

Wanneroo (C)
Greater Perth

Lowest group

2021 count

13,852

% of total

21.7%

Change from 2016

-

Medium lowest

2021 count

16,539

% of total

25.9%

Change from 2016

-

Medium highest

2021 count

18,495

% of total

29.0%

Change from 2016

-

Highest group

2021 count

14,868

% of total

23.3%

Change from 2016

-

Data table

Household income quartiles for Wanneroo (C). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Greater Perth.

Household income quartiles for Wanneroo (C). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Greater Perth.
Household income quartiles for Wanneroo (C). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Greater Perth.
Category20212016Change
Count%Greater Perth%Count%Greater Perth%Countpp
Lowest group13,85221.7%23.8%11,43721.1%23.9%--
Medium lowest16,53925.9%24.7%14,00225.9%24.8%--
Medium highest18,49529.0%25.2%15,83029.2%25.2%--
Highest group14,86823.3%26.2%12,87823.8%26.1%--
Total Households63,754100.0%100.0%54,147100.0%100.0%--