Evidence fileGuide-anchored Formula 3 and Formula 4 examples · screenshots
Multi-Case Child Support Calculator Evidence: Formula 3 and Formula 4
These maintained examples show how AusChildSupport handles two multi-case pathways: Formula 3, where a parent has another child support case, and Formula 4, where a non-parent carer and another child support case must be handled together.
Direct answer
What do the multi-case examples establish?
Does AusChildSupport calculate Formula 3 and Formula 4?
Yes. The recorded scenarios calculate Formula 3 and Formula 4 end-to-end. The visible results identify the selected formula and expose the relevant dependent child, multi-case allowance, same-age cost and cap steps used for each pathway.
| Pathway | Recorded result | Visible evidence | Guide anchor |
|---|---|---|---|
| Formula 3 — multiple child support cases | $5,659.42 per year | Relevant dependent child, allowance and cap steps | DSS Guide 2.2.4 |
| Formula 4 — multi-case with a non-parent carer | $7,070.31 per year combined to the carer | Parent liabilities, allowance and cap steps | DSS Guide 2.2.5 |
Formula 3 evidence
Multiple cases with a relevant dependent child
Formula 3 applies where one or both parents have child support responsibilities in more than one case. The pathway is described in DSS Guide 2.2.4.
Relevant dependent plus another child support case
Parent A has one relevant dependent child; Parent B has a second active child support case.
Formula 3 worked inputs and result
- Parent A income: $120,000, with one relevant dependent child aged 0-12.
- Parent B income: $100,000, with another active child support case for one child aged 0-12.
- Children in this case: three, with Parent A caring 6 nights per fortnight.
- Parent B multi-case allowance: $4,598.53, displayed as $4,599 in the result.
- Parent A pays Parent B $5,659.42 per year.
The breakdown shows the relevant dependent child amount, the multi-case allowance, the Formula 3 same-age cost method and the multi-case cap as part of one assessment.
The visible breakdown identifies Formula 3 and shows the relevant dependent child amount, multi-case allowance and cap.
View full ↗Formula 4 evidence
Non-parent carer plus another child support case
Formula 4 applies when a current case includes a non-parent carer and at least one parent also has a child in another child support case. The pathway is described in DSS Guide 2.2.5.
Carer liability and multi-case adjustments together
Parent B has another child support case; the current case has a non-parent carer with 9 of 14 nights.
Formula 4 worked inputs and result
- Parent A income: $90,000.
- Parent B income: $60,000, with another child support case for one child aged 0-12.
- Current case: one child aged 0-12, with care Parent A 3 nights, Parent B 2 nights and non-parent carer 9 nights.
- Parent B multi-case allowance: $3,474, reducing child support income to $25,480.
- Parent A pays the carer $6,230.03 and Parent B pays $840.28: $7,070.31 per year combined.
The breakdown applies non-parent-carer liability, the multi-case allowance and the multi-case cap within the same Formula 4 assessment.
The visible breakdown identifies Formula 4 and shows the carer payments, multi-case allowance and cap.
View full ↗Sources and limits
How the evidence was produced
The Formula 3 and Formula 4 examples are drawn from the maintained Formula 1-6 evidence record and reproduced through the calculator interface. Each visible result was checked for the expected formula pathway before the screenshot was written. The examples record repository behaviour and are not Services Australia assessments or production-availability evidence.