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 lowest household income quartile held the largest share among households with income in Preston Beach, accounting for 52.7%.

Section overview

Household income quartiles

Preston Beach - Households (Enumerated)

This table summarises household income quartiles for Preston Beach in 2021 for persons, with comparison against Waroona (S) and change since 2016.

Household income quartiles snapshot

2021 distribution by category for Preston Beach, with comparison markers for Waroona (S).

Preston Beach
Waroona (S)

Lowest group

2021 count

59

% of total

52.7%

Change from 2016

-

Medium lowest

2021 count

32

% of total

28.6%

Change from 2016

-

Medium highest

2021 count

11

% of total

9.8%

Change from 2016

-

Highest group

2021 count

10

% of total

8.9%

Change from 2016

-

Data table

Household income quartiles for Preston Beach. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Waroona (S).

Household income quartiles for Preston Beach. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Waroona (S).
Household income quartiles for Preston Beach. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Waroona (S).
Category20212016Change
Count%Waroona (S)%Count%Waroona (S)%Countpp
Lowest group5952.7%36.4%4156.2%35.3%--
Medium lowest3228.6%24.8%2432.9%25.1%--
Medium highest119.8%21.7%68.2%21.5%--
Highest group108.9%17.2%22.7%18.1%--
Total Households112100.0%100.0%73100.0%100.0%--