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 Sinclair, accounting for 31.2%.

Section overview

Household income quartiles

Sinclair - Households (Enumerated)

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

Household income quartiles snapshot

2021 distribution by category for Sinclair, with comparison markers for Esperance (S).

Sinclair
Esperance (S)

Lowest group

2021 count

67

% of total

29.0%

Change from 2016

-

Medium lowest

2021 count

72

% of total

31.2%

Change from 2016

-

Medium highest

2021 count

61

% of total

26.4%

Change from 2016

-

Highest group

2021 count

31

% of total

13.4%

Change from 2016

-

Data table

Household income quartiles for Sinclair. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Esperance (S).

Household income quartiles for Sinclair. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Esperance (S).
Household income quartiles for Sinclair. Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Esperance (S).
Category20212016Change
Count%Esperance (S)%Count%Esperance (S)%Countpp
Lowest group6729.0%29.8%6729.1%29.6%--
Medium lowest7231.2%26.8%8135.2%27.9%--
Medium highest6126.4%25.1%5825.2%23.8%--
Highest group3113.4%18.3%2410.4%18.6%--
Total Households231100.0%100.0%230100.0%100.0%--