Most useful information for separated parents

The pages voted most useful by other website visitors.

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  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 we work out your assessment

How your percentage of care affects your child support payments

We consider each parent or non-parent carer’s care of the child as part of our child support assessment. This is their percentage of care.

  1. Child support assessment
  2. What you need to know

Child support between Australia and New Zealand

We have special arrangements for collecting and paying child support between Australia and New Zealand.

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

How your income affects your child support

Find out how we use each parent’s income when we make a child support assessment.

  1. Separated parents
  2. Most useful information

Application for Post Separation Income to be Excluded form (CS4120)

Use this form to apply to exclude additional income from your child support assessment. This is income you earned after you separated from the child's other parent.

  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.

  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. 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. Separated parents
  2. Most useful information

Details of your child’s care arrangements form (FA012)

Use this form to provide information about your child’s care arrangements.

  1. Help for myGov, online accounts and mobile apps
  2. Child Support online help guides

Child Support online account help - Update current income

Instructions on how to update your income for the current financial year using your Child Support online account.

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Page last updated: 17 November 2025.
QC 60125