We work out the total amount of child support payable. We do this by using the Costs of Children table. We work out the costs for each child based on the parents’ combined total income. We go on to steps 7 and 8 using only the positive child support percentage. If you have different care arrangements for various children, you might have different child support percentages for each child. This is because they’re not meeting their share of the costs for the child directly through care. If it’s a positive percentage, we assess that parent as the parent to pay child support. This is because their share of costs for the child is more than the amount of care they provide. If it’s a negative percentage, we assess that parent as the parent to get child support. The result will determine if a parent pays or gets child support. We call this the child support percentage. We subtract the cost percentage from the income percentage for each parent. Work out each parent’s child support percentage We work out each parent’s cost percentage using the Care and Cost table.Ħ. We calculate each parent’s percentage of care.ĥ. Work out each parent’s percentage of care We work out each parent’s income percentage by dividing each income by the combined total.Ĥ. We add both parents’ incomes to work out a combined child support income.ģ. Read more about income used in calculating a child support assessment. For more information about relevant dependant allowances, go to child support assessments and second families.Ī parent may be able to estimate their income. This is a parent’s adjusted taxable income minus a self-support amount and any relevant dependant allowance. We calculate each parent’s child support income. Work out each parent’s child support income To calculate an estimate of your child support payments you can use our child support estimator.ġ. Read about parents with 2 or more assessments.