Social Security Regulations 2018, Schedule 8, clause 44
If you are getting Sole Parent Support or the Young Parent Payment, Work and Income can ignore up to $20 of your earnings that you use to pay for childcare.
If you are getting Supported Living Payment due to your health condition or disability, Work and Income can ignore up to $20 of your income if you worked for the money (“earned through personal effort”).
If you are a severely disabled person, Work and Income has the discretion to ignore all or some of your income. This allows you to earn income without it affecting your benefit.