Private Australian estimate

Child Support Calculator for CSPs Starting in 2025

Use this calculator only for a Child Support Period that started in 2025.

This calculator uses the annual figures for Child Support Periods starting in 2025. If you are unsure when your period started, check your child support assessment notice.

Use the current calculator instead

Children and their care

Tell us who the children are and how their care is shared.

Add your first child’s age

Step 1 of 3 Your case

Children and their care

Start with the children in this assessment and the care each parent provides.

Add your first child’s age

What this estimate usesTap to view

Both parents’ adjusted taxable income
Per-child care allocation and age
Relevant dependants and multi-case adjustments
Non-parent carer and one-parent assessment scenarios