Estimating your child support payments

You may want to estimate what your child support payments might be, for a range of reasons. To help you, we have a range of tools available online.

Important information

• You don't have to work out your child support assessment yourself — we work it out for you.
• If you don't know the other parent's details, such as their income, you won't be able to use the estimator or worksheet.
• 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.

Child support estimator

This service may give you an estimate of how much child support you may pay or receive. It can’t estimate your current child support payments or compare old and new estimates.

Access the estimator.

Child support - family assistance estimator

This service may give you an estimate of how much child support you may pay or receive, the amount of family assistance you may receive, or if you have less than 35 per cent care of your children, the amount of rent assistance you may receive.

This service can't estimate payments for every family situation. For important information and to access the estimator, click here.

Child support worksheets

Some parents and non-parent carers may not be able to use the child support calculator or the child support - family assistance estimator. You may be able to use worksheets to estimate your child support payments.

Worksheet for the basic formula

Use these worksheets to estimate the child support payable for each child. If you have different care levels for the children, you will need to estimate the child support for each child separately.

• Worksheet: Basic formula (PDF 187k)
  You can complete this worksheet electronically or print it out and complete by hand

• Example: Basic formula
  Here is an example of how to complete the worksheet

Worksheet for parents who have relevant dependent children

• Working out a relevant dependent child allowance (PDF 64k)
  Follow these steps to calculate the relevant dependent child amount for each child you and/or the other parent care for from a second or subsequent family. When you've calculated this amount, transfer it to the basic formula worksheet.

Worksheet for parents who have two or more child support assessments

• Working out a multi-case allowance (PDF 350k)
  Follow these steps if you and/or the other parent have two or more child support cases. When you've calculated this amount, transfer it to the basic formula worksheet.

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