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 Mayanup, accounting for 33.3%.

Section overview

Household income quartiles

Mayanup - Households (Enumerated)

This table summarises household income quartiles for Mayanup in 2021 for persons, with comparison against Boyup Brook (S) and change since 2016.

Household income quartiles snapshot

2021 distribution by category for Mayanup, with comparison markers for Boyup Brook (S).

Mayanup
Boyup Brook (S)

Lowest group

2021 count

18

% of total

26.1%

Change from 2016

-

Medium lowest

2021 count

23

% of total

33.3%

Change from 2016

-

Medium highest

2021 count

15

% of total

21.7%

Change from 2016

-

Highest group

2021 count

13

% of total

18.8%

Change from 2016

-

Data table

Household income quartiles for Mayanup. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Boyup Brook (S).

Household income quartiles for Mayanup. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Boyup Brook (S).
Household income quartiles for Mayanup. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Boyup Brook (S).
Category20212016Change
Count%Boyup Brook (S)%Count%Boyup Brook (S)%Countpp
Lowest group1826.1%36.8%1422.2%37.9%--
Medium lowest2333.3%28.9%1422.2%29.1%--
Medium highest1521.7%21.7%1930.2%19.5%--
Highest group1318.8%12.5%1625.4%13.5%--
Total Households69100.0%100.0%63100.0%100.0%--