Put simply, if you pay a worker, you must also pay their Super Guarantee (or SG) - which is what the compulsory superannuation contributions you pay into their super fund is officially called.
Generally, every worker aged 18 years or over qualifies for super. If they’re under 18, they must work more than 30 hours a week to qualify. Temporary residents like backpackers and overseas students are also eligible for super contributions.
It doesn’t matter whether the employment arrangement is full-time, part-time, or casual – they’re entitled to employer super payments. Plus, if you pay contractors mainly for their labour - they may also be entitled to super, as they’re categorised as employees for SG purposes.