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CSA Estimators/Calculators - The New Calculator

You may be able to use this estimator to calculate an estimate of what your child support or family assistance payments might be from 1 July 2008.

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You may be able to use this estimator to calculate an estimate of what your child support or family assistance payments might be from 1 July 2008.*

CSA Calculators

The new Child Support Scheme

* Child Support - Family Assistance Estimator - opens in new window

Direct links:

which leads to

You may be able to use this estimator to calculate an estimate of what your child support or family assistance payments might be from 1 July 2008.

You can use the estimator if:

- you have one child support assessment only

- you and the other parent don't have children from a new relationship living with you

- CSA uses the child support formula to work out your assessment

- you know the other parent's details, such as their income.

Please note: This estimator can't estimate your current child support or family assistance payments, or compare old and new estimates. It does not affect your current records in any way. If you would like to discuss a change to your current payments or details please contact us on 131 272 to speak with a Customer Service Officer

Learn more about the new Child Support Scheme

Manual worksheet, tables and examples

This worksheet uses a step by step process to help you estimate what your new child support assessment might be from 1 July 2008.

Please note: If you don't know some of the other parent's details you won't be able to use this worksheet. Also, the worksheet can only provide an estimate - the Child Support Agency will work out your new payments and send you a new child support assessment before May 2008.

The new child support formula

The new formula is based on the cost of raising children, taking the incomes of both parents into account equally. It takes into account many different family circumstances to provide a more flexible approach to calculating child support.

Current Scheme Calculators

The Child Support Calculator - opens in new window

The Child Support calculator can be used to obtain an estimate of child support payable for a particular child support period. You can perform a simple calculation based solely on income details or you can add complexity by including additional information like variables of levels of care, child/ren's age and other case related information.

Please note: The results from using this calculator are only indicative and may not be the same as a Child Support Assessment done by CSA. If you require an accurate assessment, contact us on 131272 and speak with a Customer Service Officer.

Employer Calculator - opens in a new window

To assist employers work out the net pay to the employee, taking into account child support payments, the protected earnings amount and the basic tax liability.
Please note: On 1 July 2008 the new Child Support Scheme starts. For those employers where the CSA has initiated the deduction of child support from an employee's salary, wage or contract payments (Employer Withholding), the CSA will send you a letter and new deduction schedule between April and June 2008.

From 1 July you should use the child support amount from the new deduction schedule in the employer calculator.

Calculator Comparison / Review

Eventually found the new CSA one before coming here.

For my situation it doesn't show cents so it's 52 cents per month greater.

Mine's pretty straightforward: one (1) child; she has two (2) other children.

So I'm pretty sure the calculator here tops the CSA's attempt in regard to accuracy. However they do allow for other inputs, such as foreign income. The output is far less detailed (better or worse?).

Issues with new CSA Calculator

The CSA Calculator is very limited.

I have also found a range of issues relating to some of the information given in the mouseover boxes. These all need very careful scrutiny. There are more outs than you can poke a stick at in the explanatory notes.

This service does not cover every individual's situation.

The Child Support Estimator will not work:
  • where a parent pays child support to more than one other parent.

  • where a parent receives child support from more than one other parent.

  • where a parent (including the other parent) receives child support from one person and pays child support to another.

  • where you are not the parent of the child (eg grandparents).

  • if you do not know some of the other parent's details, such as their income.
The Family Assistance Estimator will not work:
  • where either parent in the current relationship (where applicable) fits into any category outlined under 'Child Support Estimator' above.

  • where one parent in the current relationship pays child support and the other receives child support.

  • where both parents in the current relationship receive child support.

  • where both parents in the current relationship pay child support and the payment amounts are not known.
The Child Support/Family Assistance Combined Estimator will not work:
  • for any of the above

Site Director
So it is finally here!  

First of all, well done Mike T, your own calculator is exceptionally close to the CSA one, which actually gives me a bit of confidence that it is right.  Thanks for your efforts.

My case is fairly simple… 2 kids to the ex and 1 with my wife.  My payments will be dropping by $700 per month! to a high, but more reasonable number.
ou ou ou… I know the answer to this: "some are more equal than others"

Just kidding, even the well written posts and responses still leave me a little dumb founded.

Non Basic Cases

But…..those of us with more complex cases have to try and plough through the manual worksheets and tables provided, or we can believe the CSA's wonderful reassurance, and I quote…

"If you have two or more child support assessments, the worksheet may be difficult for you to use and the estimator will not work for you.

But don't worry, CSA will work out your child support and issue you with a new assessment between March and May 2008. "

May 2008…We have to sit around for 3 more months waiting to find out how we will be affected!

Talking about the worksheets :

Important notes about the printed version of the detailed information available online

1. On page 42 of the printed version, at step six, the CSA instruct customers to deduct the 'cost' percentage from the 'care' percentage, to arrive at the child support percentage. This is incorrect.  'Care' should be 'Income'.

step children

Life in Sight… I noticed you mentioned they could include step children. How does this work?

Is this only if the children have no other biological parent in their life?

I was wondering because I have a step child too.  My step child has a father though who pays no child support; my wife pays it to him even though the child lives with us shared care.

Can he be included in my assessment?
The government is supposedly making children be treated equally.

I just calculated for when my wife has our child the $200 per week I pay now will be reduced to $146 as of July but when she gives birth it only takes $20 off a week.

That's $20 a week for my new child.  Ridiculous!
Guest. I think this recommendation may be the relevant part in regard to step children:
Every Picture Tells a Story said
Recommendation 14

14.1 It should be a new ground for change of assessment that the parent has a responsibility, although not a legal duty, to support a step-child.

14.2 The ground to support a step-child is not taken to exist unless:

1) the parent has lived continuously for a period of not less than two years in a marriage or de facto relationship with the parent of the step-child; and

2) neither parent of the step-child is able to support the step-child due to:

a) death,

b) ill health,

c) caring responsibilities for a child aged under five, or

d) caring responsibilities for a child aged over five with disabilities requiring additional assistance and care from the step-child's parent; and

3) the needs of the step-child for assistance can be established, taking into account any income-tested benefit, allowance or payment being paid for the benefit of that step-child.
The calculator confirms our suspicions that hubby will be better off retiring in summer when his terms of service finish to look after our 2 babies than carrying on in his well paid job.  As the new calculation has no single income cap and also includes fringe benefits, his income for CSA purposes has increased by almost $30 000.  Hence if he carried on working, he would just be able to pay off CSA and our kids childcare.  As our kids are under 13, the reduction is trivial compared to the amount his older kids are assessed with.

Of course, this assumes that the recommendation that CTE should take into account childcare responsibilities of both the payee and PAYER is accepted!

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