Only in some situations. Service agreements are required for:
For many everyday supports (like support workers, occupational therapists, personal trainers) a written agreement isn't compulsory. It's your call whether one suits your situation.
That said, even when optional, an agreement can work in your favour: it fixes prices for a period, sets expectations on both sides and gives you something to point to if things go wrong.
Want our simple service agreement checklist? Email hello@providerchoice.com.au.