- Online business income is assessable and taxed, whether you trade as a sole trader or a company.
- GST registration becomes compulsory once your turnover hits A$75,000 in a rolling 12-month period (ATO).
- Good records and accounting software make deductions and BAS far easier at tax time.
Online business taxation in Australia applies the moment your store becomes a business rather than a hobby, so yes, small online businesses pay tax. If you sell on Shopify, a marketplace, or your own site with the intent to profit, your sales are assessable income. You will usually deal with two things: income tax on your profit, and GST once your turnover reaches A$75,000. Sleek helps online sellers stay on top of both.
Do small online businesses pay tax in Australia?
Once you sell online with the intention of making a profit, the ATO treats you as running a business, and your income is assessable and taxable. The line that matters is hobby versus business.
A hobby is occasional and not profit-driven, while regular, systematic selling aimed at income is a business. Signs you have crossed over include repeat sales, marketing your store, buying stock to resell, and tracking profit. Once you are a business, you pay tax on the profit like any other trader.
How is income tax charged on your online sales?
Income tax applies to your profit, not your total sales. You subtract allowable business expenses from your revenue, and the remaining profit is taxed.
How it is taxed depends on your structure. A sole trader reports business profit in their individual return at personal marginal rates. A company pays company tax: 25% for a base rate entity with turnover under A$50M, or 30% otherwise (ATO). Choosing between the two is worth reviewing early with an accountant.
When do you have to register for GST?
You must register for GST once your GST turnover reaches A$75,000 or more over a rolling 12-month period, whether looking back over the last 12 months or forecasting the next 12 (ATO). Turnover means gross sales, not profit, so a store selling A$80,000 of goods must register even if it nets far less.
You have 21 days to register after you know you will cross the threshold. Miss it, and the ATO can backdate your registration and charge GST on past sales, even if you never collected it. One nuance for online sellers: if all your sales go through a marketplace or electronic distribution platform, you may not need to register yourself.
What counts as assessable income for an online seller?
Assessable income is essentially every dollar your store earns from trading, before expenses. That includes product sales across every channel, whether your own site, Shopify, or a marketplace, plus shipping charged to customers.
It also captures less obvious income: platform payouts, affiliate commissions, sponsorship, and the value of goods bartered rather than paid for in cash. Foreign-currency sales are converted to Australian dollars. If value comes in because of your trading, assume it is assessable and record it.
Which deductions do online sellers often miss?
The deductions online sellers most often miss are the small recurring costs that quietly add up. Platform and payment fees such as Shopify subscriptions, transaction fees, and PayPal or Stripe charges are all deductible.
So are advertising spend, packaging and postage, cost of goods sold, software subscriptions, and a portion of home-office running costs if you pack orders from home. To claim a deduction, the expense must relate to earning your income, and you generally need a record.
How should you keep records with Xero and Shopify?
Good record-keeping means capturing every sale and expense as it happens, then connecting your sales platform to your accounting software so nothing is missed. Connecting Shopify to Xero syncs orders, fees, and payouts automatically, which cuts manual entry and errors at BAS time.
The ATO requires you to keep business records, generally for five years, and to substantiate what you claim. Cloud tools also give you a live view of turnover, which matters when you are watching the A$75,000 threshold.
TIP: Set a calendar reminder to check your rolling 12-month turnover each quarter. Crossing A$75,000 without noticing is the most common way online sellers end up with a backdated GST bill.
How Sleek helps you get your online-business tax sorted
Sleek gives online sellers a registered tax agent and cloud accounting in one place, so income tax, GST registration, and quarterly BAS are handled by people who do it every day.
We connect your Shopify and Xero data, track turnover against the GST threshold, and lodge on time.
Accounting for sole traders starts at A$1,800/year.
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FAQs about online business taxation in Australia
Do I pay tax on a small online side hustle?
Yes, if you run it as a business rather than a hobby. The ATO looks at whether you sell regularly, aim to profit, and operate in a business-like way. A one-off sale of personal items is usually a hobby. Consistent Shopify or marketplace selling with a profit motive is a business, and that income is assessable even part-time.
Do I need an ABN to sell online in Australia?
If you are running a business, yes. An ABN is free through the Australian Business Register and lets you invoice properly and register for GST. Without one, other businesses must withhold 47% from payments to you. Hobby sellers do not need an ABN, but business activity means you should have one.
Does selling on a marketplace change my GST obligations?
It can. The ATO treats some marketplaces as electronic distribution platforms, so the platform may handle GST on certain sales. If all your sales go through such a platform, you may not need to register for GST yourself. This is a genuine grey area, so confirm your specific situation before assuming the platform covers you.
Can I claim GST back on my business purchases?
Only if you are registered for GST. Once registered, you claim GST credits on the GST included in business purchases such as stock, equipment, and software. If your credits exceed the GST you owe in a period, you may receive a refund. Unregistered sellers cannot claim these credits.
How much tax will I pay on my online business profit?
It depends on structure. Sole traders pay personal marginal rates on profit, starting at 0% under the A$18,200 tax-free threshold and rising from there. Companies pay 25% as a base rate entity under A$50M turnover, otherwise 30%. The right structure depends on your profit level and goals.
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Do I need an accountant for a small online store?
Not legally, but it usually pays for itself. An accountant catches deductions you miss, keeps you on the right side of GST and BAS deadlines, and helps you pick a structure that suits your growth. For a growing Shopify store juggling fees, stock, and thresholds, that support removes real risk.
