Australian Child Support Formula 1-6 Calculator Examples
Worked examples for all six formula pathways, with exact inputs, annual results, calculator evidence and DSS source links.
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Reference Library
Guidance, arranged by subject.
A complete collection of plain-English child support resources for Australian parents.
Searching all 21 resources. Search covers titles, descriptions, subjects and related terms.
General information explains common topics.An AusChildSupport Estimate is indicative.A Services Australia Formal Assessment determines an official amount.Individual advice comes from an appropriate professional.
21 resources across all subjects
Formula and Estimates
Understanding how a child support figure is worked out and what an estimate can show.
Estimate vs Assessment: What the Difference Means
How an indicative calculator estimate differs from an official Services Australia assessment, and why the figures may not match.
Open guideHow Child Support Is Calculated in Australia: The 8-Step Formula
A plain-English walkthrough of all 8 steps Services Australia uses to calculate child support, with worked examples.
Open guideHow Much Child Support Will I Pay or Receive?
Worked 2026 examples for $100k and $150k income scenarios, one child, two children, and pay-or-receive questions.
Open guideThe Cost of Children Table: 2026 Rates Explained
The statutory table that determines the dollar cost of raising children at different income levels. Updated for 2026.
Open guideCare arrangements
Guidance about care patterns and the way changes can affect child support.
50/50 Care and Child Support: What the Formula Actually Does
Equal care does not mean zero child support. Here's exactly how the formula handles 50/50 arrangements and why income still matters.
Open guideWhen Care Arrangements Change: How Child Support Is Recalculated
How a changed care pattern may affect child support, when to report it to Services Australia, and what an Estimate can and cannot do.
Open guideIncome and financial circumstances
Resources about income, estimates and financial circumstances used in child support.
Child support and self-employment in Australia
A plain-English guide to adjusted taxable income, business circumstances, income estimates and Change of Assessment for self-employed parents.
Open guideChild Support on Centrelink Income Support: Complete Guide
On JobSeeker, DSP or Parenting Payment? Learn when the 2026 minimum rate applies, when payments can be reduced to nil, and what changes when your income rises.
Open guideIncome Estimates: How to Lodge One and What Happens at Reconciliation
When to lodge a current-year income estimate, how it affects your assessment immediately, and what reconciliation means at tax time.
Open guideSelf-Support Amount for Child Support in 2026
The 2026 self-support amount is $31,046. See how it affects child support income, minimum rates, and calculator results.
Open guideWhat Income Does Services Australia Use for Child Support?
Adjusted Taxable Income explained: what's included, what add-backs apply, and why your ATI can differ from your take-home pay.
Open guideAssessments and reviews
Information about assessment changes, review grounds and the processes around them.
Change of Assessment Reason 8: Income, Earning Capacity and Resources
Reason 8 explained for income, earning capacity, property, financial resources, evidence, and common risks.
Open guideChange of Assessment Reasons in Australia: All 10 and Evidence Examples
All 10 Change of Assessment reasons explained with evidence examples, weak-case warnings, and process-guide links for parents applying.
Open guideChange of Assessment: Process and Reasons
When a Change of Assessment may apply, what evidence matters, and how the Services Australia process works.
Open guideAgreements and payments
Resources about payment collection, private agreements and the costs child support may help cover.
Private Child Support Agreements: Binding vs Limited
How binding and limited child support agreements work, what legal advice is required, and when a private agreement makes sense.
Open guidePrivate Collect vs Agency Collect: Which Is Right for You?
The difference between managing payments yourself and having Services Australia collect on your behalf — and when to switch.
Open guideWhat Does Child Support Cover?
How ordinary child support helps meet the costs of raising a child, how the formula works, and when agreements or separate processes may matter.
Open guideGetting official or professional help
Starting points for formal processes and situations where professional help may be useful.
New to Child Support: What to Expect
What happens when you register for child support, how the first assessment works, and what to do if the other parent doesn't cooperate.
Open guideWhen Does Child Support End?
When child support usually ends, what can happen at age 18, and the limited circumstances in which support may continue.
Open guideWhen Legal Advice May Help
The child support situations that may benefit from legal advice, including agreements, disputed income, review, and enforcement.
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