Child Support Calculator 3 Children | Free Tool
• Updated February 14, 2026
How Child Support Works for 3 Children
With 3 children, the child support percentage is 27% of combined child support income. This reflects that 3 children cost more than 2, but economies of scale continue to apply. Learn more about router.push('/blog/child-support-formula-australia')} > how the formula works
Child support is capped at 2.5 times the Costs of Children amount. For 3 children, this cap typically applies when combined parental income exceeds $250,000.
Example Calculations
Children of different ages have different costs. The formula accounts for this:
Income Cap for 3 Children
Different Age Groups
Frequently Asked Questions
Calculate Your Child Support
Use our free 2026 calculator to get an instant, accurate estimate based on the official Services Australia formula.
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