The Guides to Social Policy Law is a collection of publications designed to assist decision makers administering social policy law. The information contained in this publication is intended only as a guide to relevant legislation/policy. The information is accurate as at the date listed at the bottom of the page, but may be subject to change. To discuss individual circumstances please contact Services Australia.

Child Support Guide updates - 2026

23 April 2026 (v4.98)

PageTitleDetails
1.1.C.140Child support percentageUpdated to reflect legislative change.
2.4.1When do child support periods start?Updated to reflect legislative change.
2.4.2When do child support periods end?Updated to reflect legislative change.

20 March 2026 (v4.97)

PageTitleDetails
2.3.2Current formula values (CPI values)Updated CPI figures.
2.3.3Historical formula valuesUpdated historical CPI figures.

2 February 2026 (v4.96)

There were no policy changes for this release.

2 January 2026 (v4.95)

PageTitleDetails
1.1.P.120Protected earningsAdded 2025 and 2026 protected earnings amount.
2.3.1.20Current COTC TablesUpdated 2026 COTC Table.
2.3.1.30Historical COTC TablesUpdated historical tables.
2.3.2Current formula valuesUpdated table values.
2.3.3Historical formula valuesUpdated to reflect indexation.
5.2.4Reason 4 - income of the childAdded 2025 protected earnings amount.
5.6.2Registrar-initiated change of assessmentAdded reference to new page.
5.6.3Open exchange of informationNew page.
8.3.3.20Departure authorisation certificates (DAC)Clarified policy.