Built around the 2026 Services Australia formula for a fast, high-confidence result.
Updated for 2026. All 6 formulas. Clear breakdowns.
Built on the 2026 Services Australia formula
Covers all 6 child support formulas
Clear step-by-step calculation breakdowns
Understand the formula
Understand the formulaIs your situation complex?
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Talk to a lawyerYour estimate is based on the information you entered. Official assessments are issued by Services Australia.
Recalculate whenever income, care percentage, or family structure changes. Formal assessments are updated through Services Australia.
Yes. The estimate uses current formula settings and is maintained against published Services Australia updates.
Yes. Enter nights per fortnight for each parent and the calculator applies care-based offsets.
No. Private agreements, special circumstances, and Change of Assessment outcomes can shift the formal amount.