- Child support assessment
- 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.
- Separated parents
- Most useful information
Application for fixed annual rate not to be used form (CS4119)
Use this form to request that the fixed annual rate of child support no longer applies to your child support assessment.
- Help for myGov, online accounts and mobile apps
- Child Support online help guides
Child Support online account help - Update contact details
Instructions on how to update your contact details using your Child Support online account.
- Separated parents
- Most useful information
Details of your child’s care arrangements form (FA012)
Use this form to provide information about your child’s care arrangements.
- Child Support online accounts
- How to set it up
Child Support online accounts terms and conditions
These terms and conditions govern how you use Child Support online accounts.
- Help for myGov, online accounts and mobile apps
- Child Support online help guides
Child Support online account help - Request employer deductions
Instructions on how to request employer deductions using your Child Support online account.
- Top payments
- Child support assessment
How we work out your child support assessment
How we assess the amount of child support you need to pay or receive. The formula we use to work it out is in Australian law.
- Family Tax Benefit
- How to manage your payment
Support for grandparent carers
If you’re a grandparent providing ongoing care for your grandchild, there’s support and payments available to help you.
Change of circumstances for child support
You need to let us know if your circumstances change. Some changes can affect your child support payments. Find out what to tell us and how to let us know.
Help in your language
We can help you with translated information or you can talk to a service officer who speaks your language.