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How long an assessment lasts

How long an assessment for child support lasts.

An assessment for child support lasts for a maximum of 15 months. It may end earlier than this if parents make another agreement and this is accepted by Services Australia Child support (formerly called Department of Human Services Child support), or if someone’s income tax assessment changes.

The rate of payments may vary during an assessment period if there is a change to the relevant dependent children (for example, if another child is born or turns 18) or if there is a change in the amount of child care given by a parent.

A parent can apply to have another assessment at any time if their circumstances change.

See s. 7A—Child Support (Assessment) Act 1989 (Cth)(opens in a new window) and If circumstances change.

More information


Child Support Assessment Act 1989 (Cth)

  • s. 7A—meaning of child support period

See Child Support (Assessment) Act 1989 (Cth)(opens in a new window).

Services Australia

A detailed guide, written for lawyers, is available to the general public. It has information about child support periods.

See Child Support Guide—Chapter 2.3: Child support periods(opens in a new window).