How Side Hustle and ABN Income Is Taxed

Side hustle income — Uber, freelancing, Etsy — arrives with no tax taken out. It's all payable at tax time, at once.

And the ATO isn't guessing. Data sharing from platforms like Uber, Airtasker and Airbnb means it already knows what you earned before you type a single number into your return. Here's how side hustle income actually gets taxed.

Australia taxes you as one person with one taxable income (the total the ATO taxes you on). It doesn't matter how many jobs, apps or ABNs — Australian Business Numbers, the ID number you use when you run a business — feed into it. Salary, gig earnings and freelance invoices all land in the same pile.

That combined pile climbs the tax brackets, so your side hustle income sits on top of your salary and cops your marginal rate — the tax rate on the last dollar you earn — from its very first dollar.

Example: $70,000 from the day job plus $10,000 from the hustle means that $10,000 is taxed at 30% plus the 2% Medicare levy (the extra charge that helps pay for public healthcare) — about $3,200.

"My ABN income under $18,200 is tax-free" is a myth. The $18,200 tax-free threshold — the chunk of income everyone gets tax-free — applies once, to your total income. Not once per job and again for your ABN.

If your salary already soaks up the threshold, every dollar of side hustle profit is taxed from dollar one, at whatever rate your combined income lands on.

The genuine upside: you're taxed on profit (what's left after costs), not revenue (every dollar that came in). Materials, platform fees, a slice of your phone and internet, car costs for eligible trips — every legitimate expense shrinks the amount that gets taxed.

With no employer taking tax out of gig income, your first side hustle tax return usually ends in a bill. Pay it, and the ATO may sign you up for PAYG instalments — pre-paying next year's tax in quarterly chunks sized from your last return. It's not an extra tax, just the same tax collected as you go.

The smart play from day one: skim 30 to 40 cents of every side hustle dollar into a separate account. If the bill lands, you're covered. If it doesn't, enjoy the surprise savings.

Once your business turnover — all the money coming in, before costs — hits $75,000 a year, or you expect it to, you must register for GST, the 10% goods and services tax baked into most Aussie prices. You add 10% to your prices, lodge business activity statements (short regular forms telling the ATO what you collected), and pass that GST along to the ATO.

The big exception: ride-share driving, or "ride-sourcing" in ATO-speak. Drive for Uber, Didi or similar and you must register for GST from your very first dollar — the $75,000 line doesn't apply.

Under $75,000 and not carrying passengers? GST is optional, and most small side hustles skip it to keep the paperwork light.

The formula fits on a sticky note: declare everything (the ATO's data matching — its cross-checking of platform records against your return — means they likely already know), claim every legitimate expense, and set money aside as you earn it.

Want the exact number? Model your salary plus gig income in our Scenario Planner and get the answer in seconds.