The formula we use to work it out is in Australian law.
Child support assessment
How we assess the amount of child support you need to pay or receive.
Page last updated: 10 December 2021
This information was printed 20 January 2022 from https://www.servicesaustralia.gov.au/child-support-assessment. It may not include all of the relevant information on this topic. Please consider any relevant site notices at https://www.servicesaustralia.gov.au/site-notices when using this material.