Side hustle tax: when does your hobby become a business?

First, kill the myth

There is no magic dollar figure below which side income is tax-free. People quote "$5,000" or "under $18,200 doesn't count" — neither is how it works. If what you're doing is a business, its income is taxable from the first dollar (the $18,200 tax-free threshold applies to your total income from everywhere, and a salary usually eats it already). If it's genuinely a hobby, the money isn't taxed — but you also can't claim any losses or deductions.

So everything turns on one question: hobby or business? The ATO decides on the pattern of what you do, not on the amount.

Where the ATO draws the line

No single factor decides it — it's the overall picture. You're drifting from hobby into business territory the more of these are true:

• You intend to make a profit

  You price to make money, not just to cover materials for something you'd do anyway.

• It's repeated and organised

  Regular sales, an online store, a booking system, advertising — activity with rhythm, not one-offs.

• You operate in a business-like way

  Records, a separate bank account, branding, quotes and invoices, stock on hand.

• It's growing

  Scale, reinvestment, and time committed look like building something, not pastime spending.

If it's a business: what you actually owe

The good news: it's simpler than people fear. Your side-hustle profit (income minus expenses) is added to your salary and taxed at your marginal rate through your normal tax return — as a sole trader you don't need a company or a separate return. You'll want an ABN (free), and from there three things matter:

• Declare the income, claim the costs

  Materials, platform fees, packaging, a share of phone and internet, home-office running costs, depreciation on gear — real deductions people routinely leave on the table.

• The $75k GST trap

  Cross $75,000 turnover (not profit) in a rolling 12 months and GST registration stops being optional. Miss it and the ATO can treat 1/11th of your sales as GST you owed anyway — from your own pocket.

• Put a slice aside

  No employer is withholding for you. Park 25–35% of profit in a separate account and the eventual bill (and later, PAYG instalments) is a non-event instead of a crisis.

When it's time to talk to an accountant

You don't need an accountant to sell three prints. You probably do the year your side hustle clears a few thousand in profit, touches the GST threshold, starts losing money you'd like to offset against your salary (special "non-commercial loss" rules decide whether you can), or grows to the point where the sole trader vs company question appears. One session sorts the ABN/GST setup, what to track, and how much to put aside — and the fee is deductible.

Below are top-rated sole-trader and side-hustle tax specialists on the directory — or take the 60-second match and we'll shortlist accountants who work with people exactly at your stage.

Top-rated sole trader tax accountants on the directory

AY Tax and FinancialHoppers Crossing, VIC

5.0(1,022)

J&C ACCOUNTING AND FINANCEMacquarie Park, NSW

5.0(874)

AMA AccountantsWoodville, SA TPB

5.0(651)

Digi Tax AdvisorsFootscray, VIC

5.0(630)

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