Equal care usually means each parent is recognised as meeting an equal share of the child’s costs through care.
Care and the formula
50/50 care does not always mean $0 child support.
Care is one part of the formula. The result also depends on each parent’s child support income percentage and the circumstances of the case.
The boundary
An AusChildSupport Estimate is not a Formal Assessment. Services Australia makes Formal Assessments.
Equal care
Same care. The income comparison can still change the result.
01
The short answer
Three facts to keep together.
The formula also compares each parent’s child support income percentage.
A difference between income percentage and cost percentage can still result in child support being payable.
Official explanation: Services Australia — Basic child support formula
02
How equal care enters the formula
Care meets income at one decisive subtraction.
This is the relationship that answers the equal-care question. The complete assessment method contains further steps and rules.
- 1Work out income percentage
Each parent’s child support income is divided by their combined child support income.
- 2Work out care and cost percentage
Care is determined for the child, then mapped to the care-and-cost table.
- 3Subtract cost from income
The result is that parent’s child support percentage.
Incomepercentage−Costpercentage=Child supportpercentage
A positive child support percentage is then applied to the relevant costs of the child under the applicable formula. Source
03
Same care, different outcomes
The care line can match while the income line does not.
A simplified illustration of one formula relationship—not an assessment or a prediction.
- Cost percentage
- 50% / 50%
- Child support income percentage
- 50% / 50%
- Simplified child support percentage
- 0% / 0%
- Cost percentage
- 50% / 50%
- Child support income percentage
- Higher / Lower
- Possible result
- A positive child support percentage
The illustration excludes other formula rules and case circumstances. “Income” here means child support income under the formula—not simply salary, take-home pay, turnover or a single figure from a payslip.
04
What “50/50” can look like
Three measures, one equal-cost band.
Everyday “50/50” describes an arrangement. Child support uses a percentage of care, then converts that to a cost percentage.
Nights a year176–189
Care percentage48%–52%
Cost percentage50%
A standard year cannot be divided into identical whole nights. An arrangement described as equal may therefore appear as 49% and 51%; both parents remain within the 50% cost-percentage band. Depending on the circumstances and determination, equal care may also be recorded as 50% each.
Check the official equal-care explanation and full care-and-cost table .
05
What can change the result
Equal care is not the whole case.
Child support income
The formula uses a defined child support income and compares each parent’s share of the combined amount.
See how income enters the formula →Children and care patterns
The number and ages of children affect costs; different care for different children can produce different percentages.
Read the official formula stepsOther family responsibilities
Relevant dependent children and children in other child support cases can affect the income available to the case.
Read the official formula stepsAnnual formula values
Self-support amounts, costs tables and other values change by child support period.
See our calculation methodology →Official decisions
Accepted income estimates and change-of-assessment decisions can change the inputs or treatment used in an assessment.
Understand change of assessment →Agreements and orders
Private agreements, court orders and disputed arrangements may introduce rules or legal consequences beyond this guide.
Compare private agreements →Explore the basic formula or read when legal advice may help →.
06
When care changes or is disputed
Record what is happening. Report changes promptly.
Services Australia may ask for information about the actual care pattern. Depending on the circumstances, useful records may include diaries or calendars, written arrangements, school or activity records, travel information, health-service records, messages or statements.
Care changes can affect child support and Family Tax Benefit. Tell Services Australia as soon as you can. Whether notice is given within 28 days can affect when a change is applied; late notice may also contribute to a debt, overpayment, suspension or end of an assessment.
These examples do not determine what evidence will be accepted or what outcome applies to your case.
07
Focused questions
50/50 care, in practical terms.
01Does 50/50 care mean neither parent pays child support?+
No. Equal care usually gives each parent a 50% cost percentage, but the formula also compares each parent’s child support income percentage. If those income percentages differ, an amount may still be payable.
Services Australia basic formula02Why can equal care appear as 49% and 51%?+
A standard year has 365 nights, so an exactly even split is 182.5 nights. The statutory whole-number rounding method can record equal care as 49% and 51%. Both percentages still map to a 50% cost percentage.
DSS equal-care guidance03Is care based only on overnight stays?+
Not always. Nights are generally used, but where the position is unclear the Registrar may consider the individual circumstances and broader evidence about who provides care.
DSS basics of care04What if different children have different care arrangements?+
Care and cost percentages are worked out for each child. Different arrangements can therefore produce different child support percentages and results for different children.
Services Australia basic formula05What if actual care differs from a parenting plan or court order?+
Services Australia generally uses actual care. In limited disputed-care circumstances it may temporarily use a written agreement, parenting plan or court order. Report the difference and consider legal advice where legal consequences may follow.
DSS care determinations When legal advice may help →06What should I do when care changes?+
Tell Services Australia as soon as you can. Whether notice is given within 28 days can affect when the change is applied, and late notice can contribute to a debt, overpayment, suspension or end of an assessment.
Report a care change07Can 50/50 care affect Family Tax Benefit?+
Yes. Care percentages and child support can affect Family Tax Benefit Part A. A care change may therefore require Services Australia to update child support and family payments.
Services Australia care and family payments08
Source record
The authorities behind this guide.
AuthoritySourceSupportsChecked
Commonwealth of AustraliaChild Support (Assessment) Act 1989 — latest compilation Legislative basis for administrative assessment, formula concepts and care rules.
Department of Social ServicesChild Support Guide — FAQ about equal care Why equal care can appear as 49% and 51%, and the resulting 50% cost percentage.
Department of Social ServicesChild Support Guide — Cost percentage The care-to-cost relationship, including the 48%–52% equal-cost band.
Department of Social ServicesChild Support Guide — Basics of care How care is generally assessed and what may be considered when the position is unclear.
Services AustraliaBasic child support formula The eight-step formula, care and cost table, and child support percentage.
Services AustraliaPercentage of care and child support Care evidence, disputed arrangements and timing when care changes.
Services AustraliaChild support payments and care arrangements The 28-day guidance, possible debts or overpayments, and Family Tax Benefit effects.
Source-check dates record when the linked material and stated details were inspected. They are not a legal opinion about how the law applies to an individual case.
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An AusChildSupport Estimate is indicative and is not a Formal Assessment or legal advice. Services Australia makes Formal Assessments.