When Does Your Side Hustle Become a Business? The ATO's Actual Rules (2026)
There is no magic dollar amount where a side hustle becomes a business. For the 2025-26 financial year, the ATO looks at what you are doing, why you are doing it, how often it happens, and whether the activity has a businesslike pattern.
A side hustle becomes a business when the activity shows profit intention, repetition, commercial scale, and businesslike systems. No single indicator decides it. The ATO weighs them together. The $18,200 tax-free threshold is not a hobby/business line, and ride-sourcing drivers need GST registration from their very first trip.
TL;DR
- The $18,200 tax-free threshold is not the hobby/business threshold.
- A side hustle can be a hobby, other income, or a business, depending on the facts.
- Profit intention, repetition, commercial scale, and businesslike records are stronger indicators than one big sale.
- GST registration is generally required at $75,000 GST turnover, but ride-sourcing has special GST rules from the first trip.
- Uber Eats and similar food-delivery work follow the standard $75,000 GST rule, not the ride-sourcing rule.
- Once an activity is a business, you can claim business deductions, but private costs still need to be excluded.
What the 2026 Federal Budget changes for side hustlers
The 2026 Federal Budget (handed down 12 May 2026) introduced several measures relevant to side hustlers and sole traders. From 1 July 2026 the marginal rate on income between $18,201 and $45,000 drops from 16% to 15%, and the $20,000 instant asset write-off is being made permanent for small businesses with turnover under $10 million. From 1 July 2027 a new $250 Working Australians Tax Offset applies automatically to 13 million workers including 1.5 million sole traders.
Most of these measures are proposed legislation that still needs to pass Parliament. The $18,200 tax-free threshold itself is unchanged. None of the budget measures change the hobby vs business test below, which still depends on intent, repetition, scale, and businesslike patterns. For the full picture, see our 2026 Federal Budget guide.
The myth of the $18,200 threshold
The $18,200 figure is the tax-free threshold for an Australian resident for tax purposes for a full income year.[1] It is not a side-hustle threshold, not an ABN threshold, and not a rule that lets hobby income disappear.
Business.gov.au says a side hustle can be a hobby or a business, and if your side hustle makes money, you need to declare it on your tax return.[2] The ATO also says some payments may be assessable even where you are not in business, such as payments for services, rent, barter, dividends, or one-off transactions that are income in character.[3]
That means the first question is not "Did I earn more than $18,200?" The first question is "What is this activity?" A one-off sale of personal items is different from a repeated, profit-seeking online store. A casual paid favour is different from advertising services, setting prices, keeping records, and taking repeat clients.
The 8 ATO indicators that turn hobby into business
The ATO has published business indicators drawn from court and tribunal decisions. No single indicator decides the question. The indicators are considered together.[4]
1. The activity has actually started. Planning alone is not usually enough. Buying stock, launching listings, taking bookings, invoicing, or accepting paid jobs can show the activity has moved beyond an idea.
2. It has a significant commercial purpose or character. Selling to the public, seeking customers, pricing for margin, and competing with other sellers look more commercial than occasional personal activity.
3. It is undertaken with a purpose and prospect of profit. You do not need to profit immediately, but you need a genuine plan or expectation that the activity can make money.
4. It is carried out in a manner characteristic of the industry. A designer issuing invoices, a seller managing stock, or a driver using a platform can look like others operating in that market.
5. It has repetition, regularity, or continuity. Repeated sales, weekly bookings, recurring client work, or ongoing platform activity point away from a one-off hobby.
6. It is planned, organised, and carried on in a businesslike manner. Records, a separate bank account, pricing, policies, supplier management, and marketing all help show business character.
7. It is of sufficient size, scale, and permanency to generate profit. A larger and continuing activity is more likely to be business than a small private pastime.
8. It is not better described as a hobby, recreation, or sporting activity. Enjoyment does not stop something being a business, but a private pastime without commercial intent usually stays on the hobby side.[4]
Common side hustles and where they typically land
Etsy, Redbubble, and online marketplaces
Occasional hobby craft sold to friends is different from an online store with repeated listings, marketing, pricing, and customers outside your personal circle. The ATO's online selling data program is designed to identify risks including sellers transitioning from hobby status to being in business.[5]
If you are making products for sale, tracking stock, repeating similar activity, and trying to profit, treat the activity seriously. Keep platform statements, material costs, postage, listing fees, and payment records.
Uber, ride-share, and taxi services (always business)
Ride-sourcing has special rules and the lowest threshold of any side hustle in Australia. The ATO says ride-sourcing drivers must have an ABN and be registered for GST from the day they start providing services, regardless of how much they earn.[7] You also need to issue a tax invoice for fares over $82.50 if a passenger asks.[7]
This applies to Uber, DiDi, Ola, and any other rideshare platform. Penalties and interest may apply if you do not register for GST when required.
Uber Eats, DoorDash, and food delivery (different GST rule)
Food delivery is not ride-sourcing for GST purposes. If you only deliver food, the standard $75,000 GST turnover rule applies. You still need to declare all delivery income on your tax return and keep records of expenses, but you do not need to register for GST from the first delivery the way ride-share drivers do.[6]
If you do both, ride-share and food delivery, you must be registered for GST and pay GST on both income streams. The ride-share registration rule takes precedence.
Reselling on Marketplace or eBay
Selling old personal items is usually different from buying goods to resell at a profit. The ATO online selling program collects data from selected marketplaces where sellers meet trading thresholds and uses the data to identify reporting, ABN, and GST risks.[5]
Keep proof of whether items were personal possessions, trading stock, or purchased for resale. The same platform can host all three behaviours.
Freelance writing, design, and consulting
Freelance services often become businesslike quickly because they involve clients, quotes, invoices, deadlines, and repeated skilled work. If you advertise, take repeat clients, set prices, and intend to profit, check ABN eligibility.
If the work is very occasional, it may still be assessable income even if you are not carrying on a business. Keep the same records either way: client payments, expenses, software, subscriptions, and work-use percentages.
Crypto trading vs investing
Crypto can be an investment activity or a business/trading activity depending on the facts. At a minimum, many transactions can trigger capital gains tax events. The ATO says CGT events can happen when you sell, gift, swap, trade, convert crypto to fiat currency, or use crypto to buy goods or services.[8]
Frequent trading, systems, businesslike records, and profit-seeking behaviour can change the analysis. Keep exchange exports, wallet records, transaction dates, cost bases, and AUD values.
When you need an ABN
An ABN identifies your business to government, other businesses, and the public. Business.gov.au says not everyone needs one, and to get one you need to be running a business or other enterprise.[9]
You may need an ABN if you invoice clients, want to avoid no-ABN withholding from business customers, register for GST, claim GST credits, or present as a business.[9] It is free to register through the Australian Business Register process.[9]
An ABN is not a tax shield. It does not make income tax-free and it does not make private expenses deductible. It simply identifies the business or enterprise.
When you need GST registration
The general GST rule is based on GST turnover, which is business income excluding certain sales, not profit. Business.gov.au says you must register for GST if your business has GST turnover of $75,000 or more, or if you provide taxi or limousine travel including ride-sourcing regardless of GST turnover.[10]
GST registration changes your records. If registered, you generally charge GST on taxable sales, lodge BAS, and may claim GST credits for creditable acquisitions. For income tax, if you claimed GST credits on an expense, you claim only the remaining GST-exclusive amount as a deduction.[6]
For ride-sourcing, the ATO says the $75,000 threshold does not apply and GST registration is required regardless of how much you earn.[7]
Deductions you get once it's a business
Once an activity is a business, you can claim deductions for most expenses incurred in carrying on that business if they are directly related to earning assessable income.[11] That can include platform fees, materials, postage, software, advertising, business insurance, accounting, phone and internet business use, and home-based business running expenses.
The private portion still stays out. A phone used 30% for business is not a 100% business phone. A home office used at the kitchen table does not automatically create rent deductions. If you run a home-based business, the ATO has separate rules for running expenses and occupancy expenses, including a place-of-business test for occupancy costs.[12]
For a broader list of deductions employees and side hustlers commonly miss, see our 27 most missed deductions guide.
What the ATO can already see
The ATO receives data from digital platforms, online marketplaces, crypto providers, banks, and other third parties.[13] It can match that data against tax returns and contact taxpayers when something does not line up.
If you fail to register for GST when required, do not report income, or claim expenses without evidence, you can face extra tax, interest, and penalties depending on the facts. The ATO ride-sourcing guidance specifically warns that penalties and interest may apply if drivers do not register for GST when required.[7]
For the broader risk pattern, see our ATO audit triggers guide.
How Finwell AI helps side hustlers
The hardest part of a side hustle is not the work. It is keeping two sets of records straight: PAYG salary income and deductions in one lane, business or platform income and deductions in another, and the shared costs (phone, internet, car, home office) apportioned correctly. Most side hustlers either over-claim and create audit risk, or under-claim and leave money behind. Both happen because the records are messy.
Finwell AI is built for the mixed-income reality. It captures itemised transaction data as you spend, tags each line against ATO categories, separates PAYG and business expenses automatically, and prompts you once for the apportionment percentage on shared costs. It tracks your GST turnover in real time, so you know exactly when you are approaching the $75,000 threshold rather than discovering it after the fact. For ride-share drivers, it flags the first-trip GST obligation and tracks GST on every fare so your BAS is ready to lodge.
At tax time, Finwell AI prepares lodgement-ready forms covering both your salary income and your side hustle, runs a peer desktop review, and surfaces suggestions on what you may want to amend. You press a button to lodge. Your accountant or bookkeeper can sign in to check before you do.
Finwell AI is a flat subscription, not a percentage of your income. Unlike services that only work if you invoice through them, Finwell AI works with whatever platform, bank, card, and POS you already use. Uber, Etsy, DoorDash, your design clients, your day job. All in one ledger.
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Frequently asked questions
Q: Is hobby income tax free in Australia?
Not always. A genuine hobby may not be a business, but some payments can still be assessable depending on what they are. The ATO says even if you are not in business, payments such as rent, income from providing services, barter, dividends, or some one-off transactions may still need to be declared.[3]
Q: How much can I earn from a side hustle before paying tax?
There is no separate side-hustle tax-free amount. The $18,200 figure is the resident tax-free threshold for total taxable income, not a hobby/business line.[1] Whether income is taxable depends on the activity and the type of receipt, not a special side-hustle threshold.
Q: Do I need an ABN to sell on Etsy or eBay?
You may need an ABN if the activity is a business or enterprise. Occasional sales of personal items are different from repeated, profit-seeking online selling. Business.gov.au says ABN registration requires running a business or enterprise, and the ATO monitors online selling data where sellers may transition from hobby to business.[5][9]
Q: Do Uber drivers need GST registration?
Ride-sourcing drivers must have an ABN and register for GST regardless of how much they earn. The ATO says ride-sourcing is taxi travel for GST purposes and the normal $75,000 GST turnover threshold does not apply.[7] Penalties and interest may apply if you do not register before your first trip.
Q: Do Uber Eats and DoorDash drivers need GST registration?
Not unless you exceed $75,000 GST turnover or also drive ride-share. Food delivery follows the standard small-business GST rule, not the ride-sourcing rule. You still need to declare all food-delivery income on your tax return and keep records of expenses.[6]
Q: What records should I keep for a side hustle?
Keep platform statements, invoices, receipts, bank records, mileage logs, stock and materials records, software subscriptions, home-office calculations, and notes explaining private-use percentages. Records should show income received, expenses paid, business purpose, and how you calculated each claim for each income year.
Q: Do I still need an accountant if I run a side hustle?
That depends on complexity. For a simple side hustle without GST registration, Finwell AI prepares lodgement-ready forms and runs a peer desktop review so you can lodge yourself. For GST-registered sole traders, multiple income streams, or ride-share drivers, an accountant may still add value. Either way, your accountant gets a clean, categorised dataset instead of rebuilding a year from a shoebox, and the bill comes down accordingly.
This article is general information only and not personal tax advice. For your situation, consult a registered tax agent.