Most useful information for separated parents

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

Child support assessment period

A child support period is the amount of time an assessment covers. It can be up to 15 months.

  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.

Proving your identity in person for a Centrelink payment

How to prove who you are in person at a service centre.

Advance payment

You may get part of your income support payment or Family Tax Benefit (Part A) early. This is an advance payment. You pay it back later out of your payments from us.

  1. Express Plus Child Support mobile app
  2. How to download and set up the app

Download the Express Plus Child Support mobile app

When you’ve set up your Child Support online account, you can download and use the Express Plus Child Support mobile app.

  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. 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. How to manage your assessment
  2. Overpayments

Recovering child and spousal support payments

How we enforce payments of overdue amounts of child support and spousal support.

  1. Top payments
  2. Child support assessment

Who can get a child support assessment

To be eligible for a child support assessment you must be the legal parent or non-parent carer of the child. You also must meet residence rules.

  1. Prove your identity
  2. Proving your identity online

How to prove your identity to Centrelink through myGov

How to prove who you are to Centrelink through myGov using the Centrelink identity verification linking option.

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Page last updated: 17 November 2025.
QC 60125