Money & tax

Hobby vs Business: How the ATO Actually Decides — and Why It Matters

There is no dollar threshold that turns a hobby into a business in Australia. The distinction rests on how you run the activity, not how much it earns: a business involves continuous, repeated activity carried out with the intention of making a profit, while a hobby is a pastime you pursue for enjoyment. The label matters because it decides whether you declare the income, whether you can claim deductions, and whether you can — or must — hold an ABN.

The tests the ATO actually uses

The ATO’s guidance, Are you in business?, says a business generally involves “a set of continuous and repeated activities you do for the purpose of making a profit”. No single factor decides it. Instead, the more of these questions you answer yes to, the more likely you’re in business:

• Do you intend to be in business?
• Do you intend to, and have a realistic prospect of, making a profit?
• Is the size or scale of the activity enough to make a profit?
• Are the activities repeated and continuous?
• Is it planned, organised and carried out in a businesslike manner — business records, a separate bank account, advertising to the public rather than selling to friends, business premises, licences, a business plan, a business name or ABN?

Notice what’s absent: any dollar figure. Business.gov.au makes the same point — intention to profit counts “even if you are unlikely to do so in the short term”. Equally, one-off transactions and passive investments generally aren’t a business, and neither is anything you do as an employee.

The ATO’s own worked example is a side hustle: a mechanic who starts a how-to video channel, sets a production schedule, buys equipment, advertises and joins the platform’s partner program is in business — because the activity is repeated, organised and profit-seeking, not because of what it earns.

What changes when you cross the line

Sources: business.gov.au, ATO — registering for GST.

The trade-off is symmetrical and often misunderstood. Hobby status means no tax on the income — but also no deductions, ever. If your activity runs at a loss (as most early creative ventures do), hobby status gives you nothing back. Business status brings obligations, but also deductions against your side hustle income. Which is better depends entirely on your numbers; our side hustle tax time guide covers what’s deductible.

One caution the other way: you can’t simply elect whichever label suits you. The indicators decide, and the ATO can look back at prior years if it concludes you were in business all along.

The ABN question and the 47% trap

The Australian Business Register is blunt: you’re not entitled to an ABN for a hobby, because an ABN requires carrying on an enterprise. Applying for one anyway — say, because a client asked — means declaring you’re in business, which is one of the ATO’s own businesslike indicators.

This creates a practical problem for genuine hobbyists: businesses that pay a supplier who doesn’t quote an ABN generally must withhold 47% of the payment. The fix is the ATO’s Statement by a supplier form (NAT 3346), which lets you declare the supply is made in the course of a private recreational pursuit or hobby, so no withholding applies. The payer keeps the form for their records; you can’t use it if you’re actually entitled to an ABN.

If your activity genuinely is tipping into business territory, the ABN question is worth getting right early — our guide on whether you need an ABN for a side hustle walks through it, and the second job vs ABN calculator shows what the tax difference looks like.

When a hobby becomes a business

The ATO is explicit that this isn’t a one-off assessment. You must reassess whenever your activity changes in a major way — and its lead example is a side hustle classic: “your activity was originally a hobby, but you make arrangements to make money from it, such as monetising online content you created”.

Common trigger points to watch for:

• You start selling to the public — markets, online stores, platforms — rather than to family and friends at cost.
• You begin advertising, or set up a dedicated social account or website to sell.
• You buy equipment or materials specifically to increase output or quality for sale.
• You set a regular schedule for the activity because demand justifies it.
• You start earning platform or partnership income (ad revenue, affiliate payments, sponsorships).

None of these alone flips the switch, but each is one of the indicators, and they tend to arrive together. When the answer changes, so do your obligations: declaring income, keeping records, and possibly registering for an ABN. Note also that once you’re in business, other rules can follow — if you receive government payments, business income is assessed differently, as our Centrelink and side hustles guide explains.

If you’re still not sure

Borderline cases are common — the seller who does three markets a year, the photographer who covers costs but not much more. Business.gov.au suggests three routes: read the ATO’s indicators against your own facts, get advice from an accountant, or apply for a private ruling from the ATO. The private ruling is the strongest option for peace of mind: it’s free, it’s binding on the ATO for your circumstances, and following it protects you from penalties and interest even if the answer later turns out to be wrong.

This article is general information only, not tax, legal or financial advice. It doesn't consider your personal circumstances. For advice on your situation, speak to a registered tax agent or licensed adviser, and always check current requirements with the official source linked above.