

Most new businesses in Australia start as a sole trader, and for good reason: you can be trading within a day and the setup costs almost nothing. The sole trader advantages and disadvantages only really start to bite later, usually when profits climb or the work gets riskier.
This guide sets out both sides plainly. What the structure does well, where it exposes you, and the signals that it is time to look at a company instead.
A sole trader is an individual running a business in their own right. There is no separate legal entity, and that single fact explains almost everything else about the structure.
You need an Australian Business Number (ABN) and you keep using your existing tax file number. Business income and expenses go into your individual tax return; there is no separate business return to lodge. You can employ staff, but you cannot employ yourself.
Applying for an ABN is free. Registering a business name, if you want to trade under something other than your own name, costs very little. There are no ASIC company registration fees, no annual review fee, and no requirement to publicly lodge financial information.
You make every call: pricing, suppliers, direction, hours. There is no board, no shareholders and no co-owners to consult. For a business that needs to move quickly or test an idea, that autonomy is worth a lot.
Sole traders are taxed at individual rates, which means the first $18,200 of taxable income is tax free for Australian residents. At lower profit levels that usually beats a company, which pays tax from the first dollar with no threshold.
Business losses can also be offset against other income such as wages from a day job, subject to the non-commercial loss rules. That can soften the first year or two while a business finds its feet.
Because there is no legal separation between you and the business, business debts are your debts. If a client sues or a supplier goes unpaid, your personal assets may be exposed, including savings and in some cases the family home. This is the disadvantage that matters most as contract sizes and risk grow.
The same individual rates that help at low income become a drag at high income. Sole traders pay the top marginal rate on profits above the top threshold, with no ability to retain earnings in the business at a flat company tax rate.
You cannot bring in shareholders, so growth capital comes from your own savings, retained profits, or borrowing in your name. Selling is also more awkward, because you are selling assets and goodwill rather than shares in an entity, and that limits who will buy.
The honest answer is that the right structure depends on profit, risk and plans rather than a rule of thumb. Even so, a few patterns hold up.
Sole trader tends to suit steady low to moderate profits, limited liability exposure, a single owner, and a business you intend to run rather than sell. A company tends to suit higher retained profits, work that carries real liability risk, more than one owner, and an eventual sale.
Changing structure later is possible, but it is not free. Transferring assets can trigger capital gains tax (CGT), and there are registration and advisory costs on top. Having a registered tax agent model both options against your projected profit before you commit is usually cheaper than restructuring afterwards, and our taxation services cover sole trader returns and structure reviews.
Watch for these:
None of these force a change on its own. Together, they usually mean the conversation is overdue. The ATO publishes the key tax obligations for each business structure if you want to compare the compliance load side by side.
Sole trader is the right starting point for a great many Australian businesses, and there is no prize for over-engineering a structure before the revenue justifies it. The mistake is staying in it out of habit once the risk profile has changed underneath you.
The information above is general in nature and does not take your circumstances into account. To review whether your current structure still fits the business you are running now, contact The Calculators.
Written by

The Calculators
CPA & Registered Tax Agents, Darwin NT
The Calculators team provides personalised tax and accounting services across the Northern Territory and beyond, helping businesses stay compliant with the ATO.
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