Most useful information for separated parents

The pages voted most useful by other website visitors.

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  1. Child support assessment
  2. How we work out your assessment

The child support assessment formula

The child support assessment formula looks at your circumstances to work out how much child support should be paid.

  1. Child support assessment
  2. Who can get an assessment

Reciprocating jurisdictions and residency for child support

We have arrangements for child support with a number of countries. We call these reciprocating jurisdictions.

  1. Child support assessment
  2. Who can get an assessment

Residence rules for a child support assessment

We can make a child support assessment if at least one parent lives in Australia.

  1. Child support assessment
  2. How to manage your assessment

Child support when your child turns 18

Normally child support stops when your child turns 18. If your child's in secondary study, you can apply to extend it to the end of the school year.

  1. Separated parents
  2. Separating

Guide for newly separated parents

A list of tasks you may want to do when going through separation.

  1. Child support assessment
  2. How to manage your assessment

Compare your child support collection options

Compare the difference between Child Support Collect and Private Collect and choose how you want to receive child support.

  1. Separated parents
  2. Most useful information

Separation details form (MOD S)

Use this form to let us know you’ve separated from your partner.

  1. Child support assessment
  2. How we work out your assessment

Child support care percentage estimator

The care estimator is a tool that calculates your care percentage.

Paying child support by Child Support Collect

There are different ways you can make child support payments when you use Child Support Collect.

  1. Child support assessment
  2. How we work out your assessment

Parents with 2 or more child support assessments

We work out how much child support you pay or receive if you have 2 or more families from past relationships

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Page last updated: 17 November 2025.
QC 60125