Child Support Calculator
Please enter all parents' details in your child support case
What details do you need for parents?
1. Adjusted taxable income
A parent's adjusted taxable income is the total of the following components:
- Taxable income
- Adjusted fringe benefits
- Foreign income
- Investment loss
- Reportable super contributions
2. Details for any relevant dependant children
- Children that not included in your child support case
- The child must be in parent's care for at least 128 nights a year (35%)
- The child is under 18 years of age
Please enter all Non-parent carers' details in your child support case
Non-parent carers
A non-parent carer must have at least 35% care of the child to be entitled to receive child support.
But you still need to enter the details in order to calculate the child support amount correctly if the care percentage is less than 35%
List all children included in your child support case
The child is eligible only if
- is under 18 years of age
- is not a member of a couple, and
- meets the residence requirements for a child support assessment.
- the child is in Australia when the person makes the application
- the child is an Australian citizen, or ordinarily resident in Australia on that day
Care percentage
- You need to enter how many days per week the parent or non-parent look after the child
- If the parent or non-parent carer doesn't look after child kid at all, just enter 0
- Care percentages need to be calculated separately if you have multiple children in your support case
Please list all children in your child support case
What will affect the child support value?
The rules are bit complicated, but some key things below may help you understand it
You will potentially pay more child support to others when
- You adjusted taxable income is increased
- You spent less time to look after the children included in support case
- Your cares to other relevant children are reduced
- The children are getting older and the child cost are increasing
You will potentially pay less child support amount when
- Male Total Average Weekly Earnings announced by government is increased
- It means the self support amount is increased
- Your adjusted taxable income is reduced
- You provide more cares to relevant dependant children
- You provide more carer to the children in your support case
Child Support Result
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Frequently Asked Questions
How is child support calculated in Australia?
Child support in Australia is calculated using the Child Support formula, which considers both parents' incomes, the number of nights the children spend with each parent, the ages of the children, and the number of children. Services Australia administers the scheme.
What is the Costs of Children table?
The Costs of Children table is used in the child support formula to estimate the annual cost of raising children at different income levels and ages. It is updated periodically and is based on research into Australian household expenditure.
What is the child support income?
Child support income is the income used in the calculation. It is each parent's adjusted taxable income minus a self-support amount (currently $31,046 for the 2026 child support period). If a parent's income is below this, they have zero child support income.
Can I change my child support assessment?
Yes. You can apply to Services Australia for a change of assessment if there are special circumstances, such as a significant change in either parent's income, the child's needs, or the cost of caring for the child.
What happens if a parent does not pay child support?
Services Australia can collect child support through various enforcement methods including intercepting tax refunds, garnishing wages, and taking legal action. Unpaid child support accrues as a debt.