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Basic 8 step formula
What we do
This step is about
Work out each parent's child support income
We calculate each parent's child support income. This is a parent's adjusted taxable income minus a self-support amount and any relevant dependant allowance. For more information about relevant dependant allowances, go to child support assessments and second families
A parent may be able to estimate their income. Read more about income used in calculating a child support assessment
Work out the parents' combined income
We add both parents' incomes to work out a combined child support income.
Work out each parent's income percentage
We work out each parent's income percentage by dividing each income by the combined total.
Work out each parent's percentage of care
We calculate each parent's percentage of care.
Work out each parent's cost percentage
We work out each parent's cost percentage using the care and cost table
Work out each parent's child support percentage
We subtract the cost percentage from the income percentage for each parent. We call this the child support percentage. The result will determine if a parent pays or gets child support.
If it's a negative percentage, we assess that parent as the parent to get child support. This is because their share of costs for the child is more than met by the amount of care they provide.
If it's a positive percentage, we assess that parent as the parent to pay child support. This is because they're not meeting their share of the costs for the child directly through care.
If you have different care arrangements for various children, you might have different child support percentages for each child.
We go on to steps 7 and 8 using only the positive child support percentage.
Child support percentage
Work out the costs of children
We work out the costs for each child based on the parents' combined total income using the costs of children
Costs of children
Work out the child support amount
We work out the total amount of child support payable by multiplying the positive child support percentage by the costs of the child. If both parents are assessed to pay each other, these amounts are offset before arriving at the final figure. This final figure is the amount the paying parent needs to pay the other parent.
Child support to pay