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 Bidwill (NSW), accounting for 49%.

Section overview

Household income quartiles

Bidwill (NSW) - Households (Enumerated)

This table summarises household income quartiles for Bidwill (NSW) in 2021 for persons, with comparison against Blacktown (C) and change since 2016.

Household income quartiles snapshot

2021 distribution by category for Bidwill (NSW), with comparison markers for Blacktown (C).

Bidwill (NSW)
Blacktown (C)

Lowest group

2021 count

564

% of total

49.0%

Change from 2016

-

Medium lowest

2021 count

327

% of total

28.4%

Change from 2016

-

Medium highest

2021 count

192

% of total

16.7%

Change from 2016

-

Highest group

2021 count

67

% of total

5.8%

Change from 2016

-

Data table

Household income quartiles for Bidwill (NSW). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Blacktown (C).

Household income quartiles for Bidwill (NSW). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Blacktown (C).
Household income quartiles for Bidwill (NSW). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Blacktown (C).
Category20212016Change
Count%Blacktown (C)%Count%Blacktown (C)%Countpp
Lowest group56449.0%19.5%51746.3%19.8%--
Medium lowest32728.4%23.5%35531.8%23.9%--
Medium highest19216.7%29.9%18716.8%29.8%--
Highest group675.8%27.1%575.1%26.5%--
Total Households1,150100.0%100.0%1,116100.0%100.0%--
Household income quartiles for Bidwill (NSW) | Community Explorer