?
Penalty rates have nothing to do with overtime. They are a rate set to reimburse an employee for working non sociable hours.
Overtime is regarded as a penalty rate I am sorry to say as per the link below.
https://www.fairwork.gov.au/pay/penalty-rates-and-allowances
Penalty rates
Employees often get a higher pay rate when working:
- weekends
- public holidays
- overtime
- late nights shifts or
- early morning shifts.