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• Parents and carers
• About you
  • How can we help?
  • Information for parents who receive Family Tax Benefit
  • Lodging your tax return
• Your child support
  • Your child support options
  • Arranging child support independently
  • How to apply for child support
  • Parents in same sex couples
  • Estimating your child support payments
  • Self-help tools
  • Spending time with your children
• Child support agreements
  • What is an agreement?
  • Limited agreements
  • Binding agreements
  • Lump sum payments
  • Agreements and Family Tax Benefit
• Child support and the Family Courts
  • Court orders
  • Role of the Family Courts
  • Court orders for care
  • Parentage testing
• Paying child support
  • Your payment options
  • Private payments
  • CSA transfers payments between parents
  • Making direct payments
• When things change
  • When your circumstances change
  • If you decide to give your relationship another chance
  • Is your child turning 18 and still at school?
  • Changing your child support in special circumstances
  • If your income changes or is wrong
  • Making care arrangements for your children
  • Second families
  • Estimating child support payments
• Our services for you
  • Our commitment to you
  • If you don't agree with a CSA decision
  • Making a complaint
  • Changing your child support in special circumstances
  • Your choices for service
  • CSAonline
  • Call us
  • Visit us
  • Your information and privacy
  • Self-help tools
• Meeting your child support responsibilities
  • Overdue child support payments
  • Collection and enforcement methods
  • What you can do to help us help you
  • Lodging your tax return
• Support for separated families
  • Support from CSA
  • Support services in the community
  • Support at work after separation
  • Support for children
  • Advocacy and support for parents
  • Centrelink and the Family Assistance Office
  • Useful contacts
• The Parent's Guide to Child Support
• Parents FAQs

• International parents

• Child support formula

• Employers

• Legal professionals

• Stakeholders

• Indigenous parents

• Young people

• Job seekers

• Media

When your circumstances change

When your circumstances change, contact us as soon as you can. Call us on 131 272 or you may also be able to use CSAonline.

We can't backdate most changes, and if we don't know your current details then your child support assessment might not be accurate.

You might pay too much child support or not receive the correct amount if there was a change to your circumstances and you didn't tell us about it. If you receive too much child support, we'll help you work out a repayment arrangement.

If you're at risk of violence, contact us immediately - we can talk to you about available options and refer you to services that can help.

Changes you need to tell us about

Your contact details

• Postal address
• Telephone numbers
• Email address (if you have one)

Your bank account details

• Change of bank
• Change to the account name
• Change to the account number

Your income

• Getting a job
• Losing your job
• Changing jobs
• An increase or decrease in your current income

Learn more about income.

Your children's details

• Care arrangements change
• If you have children with another partner
• Your children become legally adopted
• You and the other parent have another child together and want this child included in your child support assessment
• Your child marries or starts to live in a de facto relationship
• A parent or child included in the child support assessment dies

Moving overseas

• You move overseas
• The other parent moves overseas
• Your child moves overseas

Learn more about international customers.

You and the other parent decide to get back together

Learn more about reconciling with the other parent.