You could engage a contract management agency to do your invoicing, and to deduct your tax, super etc commitments. Companies like Entity Solutions, ADAPS etc offer this service at either a flat or percentage rate, based on length of contract, rate of income etc. Some even bundle in an accountant at the end of the FY to do your tax for you. For a one-off gig it might be easier than setting up your own structure.
The other consideration is Professional Indemnity/Public Liability insurance -(usually referred to as PI/PL) - you can get your own policy, or again there are agencies willing to bundle you under their cover for a flat or percentage rate. Do your research and don't work without insurance.
jsmeaton|10 years ago