How is Australian Child Support calculated in 2026?

It is calculated using the official 8-step formula based on combined income, care percentages, and cost of living tables provided by Services Australia.

Does 50/50 care mean no child support?

Not necessarily. If there is a significant income disparity between parents, child support may still be payable even with 50/50 shared care.

When does a child's income affect child support?

A child's income or resources may affect child support when they are significant enough to reduce the child's need for parental financial support—for example, a substantial inheritance or trust fund.

Does a teenager's part-time job affect child support?

Usually not, unless the income is substantial. Small part-time earnings (e.g., $50-100/week) are unlikely to affect the assessment, but significant income may be considered.

Can trust funds or inheritances be considered?

Yes. If a child has access to a trust fund or received an inheritance that can be used for their expenses, this can be considered under Reason 4.

What evidence do I need for a Reason 4 application?

Provide evidence of the child's income (payslips), bank statements, trust deeds, inheritance documentation, or any other proof of the child's financial resources.

Reason 4: Child's Income or Resources - Child Support Change of Assessment

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Reason 4

Reason 4: Child's Income/Resources

Child Support Change of Assessment

Services Australia Code: 5.2.4

What is this reason?

If your child has their own income or financial resources, this may affect how much child support should be paid. This is "Reason 4" under the Child Support (Assessment) Act. This reason may apply when a child: - Has part-time or casual employment earning significant income - Has received an inheritance or trust fund - Owns property or investments in their name - Receives income from a family business - Has a substantial savings account The Registrar considers whether the child's resources reduce the need for parental financial support, and whether it's appropriate for the child to contribute to their own costs.

John and Sarah's Story

John and Sarah's 16-year-old son Michael received an inheritance of $150,000 from his grandparents. The money is held in a trust for him but can be used for his education and living expenses. Michael also works part-time, earning $15,000 per year. John applied for a Change of Assessment under Reason 4. He argued that Michael's inheritance and income meant he required less financial support from his parents. The Registrar reviewed the trust deed and Michael's earnings, and reduced John's child support to reflect that Michael's own resources could cover some of his expenses.

Do you think this applies to you?

If this reason sounds like your situation, you may be eligible for a Change of Assessment. Our tool can help you identify which grounds apply to your case.

Related Information

Calculate Your Child Support

View All Special Circumstances

Browse Other Reasons

Reason 1

High Costs of Contact

Reason 2

Special Needs Care Costs

Reason 3

High Costs of Caring/Educating

Reason 5

Transferred Benefits

Reason 6

High Childcare Costs

Reason 7

Reduced Capacity - Commitments

Reason 8A

Income/Property/Resources

Reason 8B

Earning Capacity

Reason 9

Duty to Maintain Another

Reason 10

Resident Child Responsibility

Frequently Asked Questions

This information is general in nature and not legal advice. Every situation is different. For advice specific to your circumstances, consider consulting with a family lawyer.

INCOME

CARE

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Frequently Asked Questions