Reason for separation

The reasons that ADF members separate from the ADF can be categorised into four broad groups:

  • voluntary separation
  • involuntary medical separation
  • contractual/administrative change
  • other involuntary separation.

The separation point used in this report reflects full separation from the ADF, that is, when a member is no longer permanent or reserve. Separation reason is therefore the reason recorded for leaving the last engagement with the ADF.

Due to a change in the way the reasons for separating the ADF was recorded during 2002, analysis is presented only for ADF members who left from 1 January 2003 onwards. These members comprise 41% of the total ex-serving members with at least 1 day of service since 1 January 1985.

The two top reasons for leaving the ADF were voluntary separation (45%), with the proportions similar for males and females and other involuntary reasons (30%), with males (31%) more likely to record this reason than females (25%).

Table 7: Reason for leaving the ADF, ex-serving members, 1 January 2003 to 31 December 2019

Separation reason

Males
(Number)

Males
(Per cent)

Females
(Number)

Females
(Per cent)

Persons
(Number)

Persons
(Per cent)

Voluntary

40,893

45.0

7,375

44.7

48,268

44.9

Other involuntary

28,080

30.9

4,050

24.5

32,130

29.9

Involuntary medical

12,674

13.9

2,818

17.1

15,492

14.4

Contractual/Administrative
change(a)

9,300

10.2

2,260

13.7

11,560

10.8

Total ex-serving with a
separation reason

90,947

100.0

16,503

100.0

107,450

100.0

(a) Contractual/Administrative change includes contract completed, data migration requirement and separation reasons that include contractual change and/or changes in Defence personnel system (e.g. transitioning of payroll system to PMKeyS introduced from 2001).

Source: AIHW analysis of linked Defence Historical Personnel data–PMKeyS–NDI data 1985–2019.

Of all reasons for separating from active service, the most common separation reason was resignation (28%), followed by separated non-contactable (13%) which are voluntary separation reasons. The most common other involuntary reasons were individual’s retention not being in the service’s interest (12%) and absence (8%).