Child support is usually set based on both parents’ financial situations and the child’s needs at the time of separation. But life doesn’t always stick to the plan. Changes in income, job status, or family arrangements can all affect what’s fair — and in Western Australia, you can apply to modify child support if circumstances shift significantly.
Here’s a quick guide to how the process works and what you need to know.
Try to Reach an Agreement
If you and the other parent can communicate well, try discussing the changes first. You can agree to update the arrangement and make it official through a binding child support agreement. Once registered with the Child Support Agency (CSA), it becomes enforceable.
This can be a faster, less stressful option — as long as both parties are on the same page.
Ask the Child Support Agency (CSA) to Review It
If you can’t agree, you can request a Change of Assessment from the CSA.
What’s involved:
- Fill out the form on the Services Australia website
- Provide evidence of the changes (e.g. income, medical bills, changes in care)
- The CSA will assess your situation and notify both parents of the outcome
Go Through the Family Court
If child support was ordered by a court or the CSA process doesn’t resolve the issue, you may need to apply to the Family Court of Western Australia for a modification.
The court will look at:
- The reason for the change
- The child’s best interests
- Each parent’s financial situation
We highly recommend seeking legal advice during this process to make sure your case is properly presented to give you the best chance of your desired outcome. That’s where we can help!
But don’t forget your rights and responsibilities…
- Both parents are legally responsible for supporting their children financially, no matter their relationship status.
- You must disclose accurate financial information — hiding assets or income can lead to penalties.
- Keep good records of payments, changes in care, and financial documents to support your case if needed.
Modifying child support can feel overwhelming, but you don’t have to go it alone. Whether you’re trying to negotiate, apply through the CSA, or navigate court, our family law team can guide you through every step. Contact us today for clear advice and practical support.
