Tax for casual workers in Australia — a simple guide

Casual work creates specific tax considerations that are easy to overlook.

Provide your Tax File Number to every employer If you don't provide your TFN, employers must withhold tax at the top marginal rate (47%). Always submit your TFN Declaration form when starting any new casual role.

Tax withheld by each employer is independent If you have three casual jobs each paying $30,000 per year, each employer withholds tax as if that's your only income. At tax time, your combined income will create a larger tax bill.

Claiming work-related deductions Casual workers can claim licensing and certification costs (RSA, White Card, First Aid), uniforms and protective clothing, tools and equipment purchased for work, and professional development directly related to your work.

Lodge your tax return All income over the tax-free threshold ($18,200 in 2024-25) must be declared. Lodge through myTax on myGov.

If you're also doing gig work Gig income is not subject to PAYG withholding — you need to set money aside yourself and potentially pay PAYG instalments quarterly.