There are some cases where payers have a low taxable income but this is not an accurate reflection of their financial situation. Therefore, if a paying parent has a very low income but is not in receipt of a Centrelink benefit, the Minimum Annual Rate is replaced by a Fixed Annual Rate. For the 2023 calendar year this is $1,632 per child capped at three children, being $31.38 per week per child (capped at $94.14 per week).

The Fixed Annual Rate is not payable if the paying parent has 35% (or more) care of the child, because it is accepted that they are contributing to the costs of the child through the care provided.

If a parent wishes to dispute a fixed rate assessment they should contact the Services Australia - Child Support on 131 272. The Department will require further evidence of income to enable the officer to make a decision.