50/50 Child Support Calculator Australia
Use this equal-care scenario when care is exactly 50/50 and you want the calculator to show whether the income difference still creates a payment.
Use this 50/50 child support calculator scenario when care is equal: about 182 to 183 nights each per year, or 7 nights each per fortnight. Equal care usually maps to a 50% cost percentage, but the calculator still needs both parents’ incomes because income share can still create a payment.
Calculate your 50/50 child support estimate
Enter both parents' incomes, one child or multiple children, and exact equal care to see whether a payment may still apply.
Calculate a 50/50 estimateWhat changes the result
- Use this page for exact equal care, not broad shared-care arrangements.
- Enter both parents’ incomes because 50/50 care does not make income percentages equal.
- Use the broader shared-care calculator if care sits anywhere in the 35%-65% band but is not exactly equal.
Exact 50/50 care: what this calculator scenario assumes
This page is for exact equal-care estimates. In a 365-day year, true 50/50 care usually means one parent has 182 nights and the other has 183 nights. On a fortnightly schedule, it usually means 7 nights each.
The 48% to 52% care band maps to a 50% cost percentage, so the main thing the calculator still needs is income. If your nights are not actually equal, use the shared-care calculator for 35%-65% care instead.
Why income still matters with equal care
Equal care changes the care side of the formula. It does not make both parents' income percentages equal. If one parent earns substantially more, their income share can still sit above their 50% cost percentage, which is why the calculator may still show a payment.
For the full explanation of why equal care can still produce a payment, read the 50/50 care and child support guide.
Check the nights before you estimate
If you are not sure whether your arrangement is exactly equal, convert your annual overnight count first. Small changes around the 48% to 52% band usually keep the same 50% cost percentage, but wider changes belong in the broader shared-care flow.
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Frequently asked questions
Does 50/50 care mean no child support in Australia?
Not automatically. Equal care usually gives each parent a 50% cost percentage, but the formula still compares both parents’ incomes. If one parent has the higher income share, a payment may still apply.
What care split should I enter for a 50/50 estimate?
Use this scenario for about 182 to 183 nights per parent across the year, or 7 nights each per fortnight. If the split is wider than exact equal care, use the shared-care calculator instead.
Why does the calculator need income if care is equal?
Because equal care only affects the care and cost side of the formula. The calculator still needs income to compare each parent’s income percentage against their 50% cost percentage.