Do You Need an ABN for Your Side Hustle? (The ATO's Real Test)

🧭 The ATO's real test🔗

The ATO doesn't care whether you made $500 or $50,000. What matters is whether your activity looks and feels like a business: do you intend to make a profit, are the activities repeated and ongoing, is the scale large enough to actually generate a profit, do you keep records, have a separate bank account, advertise publicly or hold licences, and does your activity involve commercial sales at a reasonable scale. No single factor is decisive, the ATO weighs them together.

Not a business: a one-off transaction, work done as an employee, a genuine hobby with no real profit intent, or passive investment income like dividends or agent-managed rental income.

🔢 Why there's no magic income number🔗

🎯 The essential: The $75,000 figure people quote is the GST registration threshold, a completely different rule. There's no income amount that determines ABN eligibility.

Someone earning $500 a year selling handmade jewellery, with a business Instagram, a cost spreadsheet and active growth plans, is likely a business and probably needs an ABN. Someone earning $10,000 a year from a craft fair they attend once for fun, without advertising or record-keeping, is likely a hobby and probably doesn't. Income alone tells the ATO almost nothing, the nature of the activity is everything.

💸 The 47% withholding rule🔗

This isn't a fine, it's a withholding mechanism, you can claim it back as a credit in your tax return, and the payer must give you a payment summary so you can reclaim it. But in the meantime you've received 53 cents in the dollar on every invoice, a real cash flow problem if you're relying on that income.

If you're genuinely not running a business, a hobby or a private transaction, you can complete a "Statement by a Supplier" form so the payer doesn't need to withhold. You can't use this form if you're actually running a business, and if the payer has reasonable grounds to doubt it, they must still withhold.

🙅 When you don't need an ABN🔗

• You're a genuine hobbyist, doing it for enjoyment with no real profit intent
• You're an employee, your employer handles tax via your TFN and payroll, and can't require you to get an ABN as a condition of employment
• You're earning passive investment income, like share dividends or agent-managed rental income
• You're under 18 and earning under $350 a week, using the Statement by a Supplier exception

🧩 Real-world examples🔗

Selling handmade candles every weekend with ads to grow your store: almost certainly a business, get an ABN. Selling old furniture on Facebook Marketplace twice a year: almost certainly not, no ABN needed. Tutoring 10 students a week across two platforms with your own set rates: a business, you need an ABN. Mowing a neighbour's lawn occasionally when asked: probably a hobby or private arrangement.

🪪 How to get an ABN🔗

It's free, takes about 15 minutes, and most sole trader applications are approved on the spot. Apply through the Australian Business Register at abr.gov.au with your TFN and some basic activity and identity details. If your application needs manual review, it can take up to 28 days, but that's the exception, not the rule. Once you have it, put it on every invoice, quote and email you send to clients or businesses.

❓ Frequently asked questions🔗