Binding child support agreement

An agreement between parents or carers about child support payments. It must be in writing and signed by both parents.

You must seek legal advice before making a binding agreement.

You need to know


A binding child support agreement allows you to make an agreement about your child support payments.

Read more about binding child support agreements

Notional assessment

We assess what the child support rate would be if the agreement wasn’t in place. We call this a notional assessment.

Read more about Notional assessment

Child support and your Family Tax Benefit Part A

Any child support you get can affect how much Family Tax Benefit (FTB) Part A you get.

Read more about child support and your FTB Part A

Child support responsibilities

As a parent, you have responsibilities.

You must:

  • pay your child support in full and on time
  • make sure care arrangements are in place for your children
  • lodge your tax return on time
  • report your income accurately, and
  • tell us about any changes of circumstances

Ending a binding child support agreement

To end your current agreement, you must make a new one.

If you can’t agree, you can apply for a court order to set aside your agreement. These court applications can be costly and complex.

Please seek legal advice for more information about ending an agreement.

Notifying us

You must get legal advice before you make a binding child support agreement. This is so you know what you’re responsible for in the agreement.


  • decide if you’ll negotiate an agreement with the other parent
  • use the Child Support Agreement form or draft your terms with the help of a legal professional
  • submit your agreement and any other documents we ask for
  • apply either in writing or over the phone to have the agreement accepted
  • wait for us to assess your agreement and let you know the results

Tell us

Paying child support

How to pay child support

There are different ways to make child support payments.

Read more about payment methods for child support

Collecting child support

Choose a collection option

The person who will receive child support can choose how the paying parent pays them.

Read more about collection options

Private Collect

This is where you and the other parent make and receive payments directly between you. It’s for parents who don’t need much help from us to agree on a plan.

Read more about Private Collect payments

Child Support Collect

This is where we collect and transfer child support payments for you.

Read more about Child Support Collect payments

Changes of circumstances that affect your child support

We need to know about changes that could affect your child support.

Read more about how a change of circumstances can affect your child support

Page last updated: 18 October 2017