Based on what you've told us, it looks like you're covered by the Horticulture Award [MA000028].
An employee has to be paid public holiday rates for all time worked on a public holiday.
To calculate hourly public holiday pay rates, use our Pay Calculator.
Casual employees who work on a public holiday are paid 225% of their minimum hourly wage (this includes their 25% casual loading). They get this rate whether they're working overtime hours or normal hours.
The public holiday rate for full-time and part-time pieceworkers is calculated by multiplying the worker's piecework earnings for that day by the public holiday rate of 200%.
Minimum hours on public holidays
The Horticulture Award doesn’t have specific minimum daily hours for public holidays.
For the minimum daily hours in this award, go to Hours of work.
Substituting public holidays
An employer and an employee can agree to substitute a public holiday (or part-day public holiday) for another day.
If a public holiday is substituted, then the substitute day is regarded as the public holiday and penalty rates are only paid on the substitute day.
We’ve made it easier for you to find information about pay and entitlements under the Horticulture Award. For more tailored information about your award, visit our Horticulture Showcase.
To find out more about who this award applies to, go to the Horticulture Award summary.
Source reference: Horticulture Award [MA000028] clause 27