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 Seaforth (Qld), accounting for 41.5%.

Section overview

Household income quartiles

Seaforth (Qld) - Households (Enumerated)

This table summarises household income quartiles for Seaforth (Qld) in 2021 for persons, with comparison against Mackay (R) and change since 2016.

Household income quartiles snapshot

2021 distribution by category for Seaforth (Qld), with comparison markers for Mackay (R).

Seaforth (Qld)
Mackay (R)

Lowest group

2021 count

114

% of total

41.5%

Change from 2016

-

Medium lowest

2021 count

63

% of total

22.9%

Change from 2016

-

Medium highest

2021 count

41

% of total

14.9%

Change from 2016

-

Highest group

2021 count

57

% of total

20.7%

Change from 2016

-

Data table

Household income quartiles for Seaforth (Qld). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Mackay (R).

Household income quartiles for Seaforth (Qld). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Mackay (R).
Household income quartiles for Seaforth (Qld). Household income quartiles. 2021 and 2016 counts, percentages, and change compared with Mackay (R).
Category20212016Change
Count%Mackay (R)%Count%Mackay (R)%Countpp
Lowest group11441.5%23.9%10738.9%25.2%--
Medium lowest6322.9%21.6%6824.7%23.1%--
Medium highest4114.9%25.8%5620.4%25.3%--
Highest group5720.7%28.6%4416.0%26.5%--
Total Households275100.0%100.0%275100.0%100.0%--