Child support assessment period

A child support assessment period can be up to 15 months.

When a new child support period starts

A child support period will start:

  • on the day you make an application for child support
  • on the day you make an application to accept a child support agreement, if it starts a new case
  • on the day a child support agreement changes a child support assessment,
  • the day after the current child period ends, or
  • when the ATO tells us new income information for the most recent financial year, if that year of income isn’t already used in an assessment

If a new ATO income starts a child support period, it starts:

  • on the 1st day of the next month if we receive the ATO income by the 15th of the month, or
  • on the 1st day of the month after next if we receive the ATO income after the 15th of the month

Changes during a child support period

We can update your assessment at any time. You must tell us as soon as you can if your circumstances change. For example, we need to know if:

  • your income changes, or
  • the amount of time the child lives with you changes

Page last updated: 18 October 2017