Sole Trader vs Company in Australia: Which Structure Should You Start With?

Most Australians starting a small business or side hustle should start as a sole trader. It costs nothing to set up, you can be trading the same day your ABN comes through, and you can move to a company later when there is a real reason to. A company makes sense from day one if you are taking on staff, signing contracts with real risk attached, or going into business with someone else. If someone has mentioned a trust to you, that is an accountant conversation, not a weekend decision.

TL;DR

A sole trader is you, trading under your own ABN, personally responsible for everything the business does. A company is a separate legal entity registered with ASIC, with its own tax rate and its own paperwork, and you become its director. Sole trader is free, fast and fine for most side hustles and one-person trades. Switch to a company when you hire, take on liability you could not personally cover, bring in a partner, or your accountant tells you the tax maths now favours it. Whatever you pick, if you trade under any name other than your own you must register that business name with ASIC.

The four structures in one breath

Australia has four common structures for a small business. The government's own comparison is on the business.gov.au business structures page, and it is worth ten minutes of your time.

• Sole trader. One person, one ABN, full control, full personal responsibility.
• Partnership. Two or more people running the business together and sharing income and losses. Each partner is personally on the hook, including for things the other partner did.
• Company (Pty Ltd). A separate legal entity registered with ASIC. The company owns the business, you own shares in the company and act as its director.
• Trust. A trustee holds the business for the benefit of others. Useful in some family and asset protection situations, expensive to set up and run, and not something to attempt without an accountant.

Setup cost and effort

A sole trader needs an ABN and nothing else. ABN registration is free through the Australian Business Register, and we walk through the form in how to register your ABN. If you want to trade under a business name rather than your own name, add a business name registration with ASIC (more on that below).

A company needs to be registered with ASIC before it exists. You choose a name, decide who the directors and shareholders are, nominate a registered office, and lodge the application through the ASIC company registration page. There is a registration fee, and it changes from time to time, so check the current figure on that page rather than trusting a number you read somewhere else. Many people pay an accountant or an online formation service to do this for them, which adds to the cost but saves mistakes.

Before you can be appointed as a director you also need a director ID. It is a free 15-digit number you apply for once, online, through the Australian Business Registry Services, and you keep it for life. Apply for it before you lodge the company registration, not after.

Then the company itself needs its own ABN and tax file number, which is a separate application from your personal ones.

Who carries the risk

This is the part that should drive your decision more than tax.

As a sole trader, business.gov.au puts it plainly: you are legally responsible for all aspects of the business, including any debts and losses. There is no line between your business and you. If a client sues, or a supplier is owed money the business cannot pay, your personal assets are in play. Insurance covers some of that risk, which is why public liability insurance is close to compulsory for anyone doing physical work on someone else's property.

A company is a separate legal entity. It can incur debt, sue and be sued in its own name. As a shareholder, your financial exposure is limited to what you paid for your shares. That is the whole point of "limited" in Pty Ltd.

Two honest caveats. First, directors still have legal duties, and breaching them can make you personally liable. Trading while the company cannot pay its debts is the classic example, which is why company directors have to complete a declaration of solvency each year. Second, banks and landlords know how limited liability works, so a new company with no track record will often be asked for a personal guarantee from the director anyway. The company structure protects you from the customer who slips on your floor. It does not necessarily protect you from your own bank.

How each one is taxed

A sole trader does not lodge a separate business tax return. Business income goes into your individual tax return and is taxed at your personal marginal rate, on top of any wages you earn. Low income means low tax. High income means you are paying the top marginal rate on the last dollars the business earns.

A company lodges its own tax return and pays tax at the company rate. The ATO publishes the current rates, including the lower rate that applies to base rate entities, on its company tax rates page. Read the actual figures there, because the rate depends on the company's turnover and has changed several times.

The trap people fall into is comparing the headline company rate with the top personal rate and concluding a company is cheaper. The company's money is not your money. To get it into your pocket you pay yourself a wage (taxed at your marginal rate) or take dividends (with franking credits doing some of the work). The saving is real in some situations and imaginary in others, which is why this is the point at which you stop reading blog posts and ask an accountant to run your numbers.

Ongoing admin

The sole trader's admin load is light. Keep records, put money aside for tax, lodge your individual return. Once your turnover reaches A$75,000 you must register for GST and lodge a business activity statement, which we cover in understanding BAS lodgement for small business. A separate bank account is not legally required for a sole trader, but open one anyway. Mixing personal and business transactions is the most common reason bookkeeping turns into a shoebox of receipts in June.

A company's admin is heavier and non-optional:

• A separate bank account in the company's name, because the money is legally the company's.
• An annual review from ASIC, with an annual review fee to pay and a solvency declaration to make. Miss the payment and late fees start.
• Keeping ASIC's records current when a director, address or shareholder changes.
• A company tax return each year, and BAS lodgement once registered for GST (the same A$75,000 threshold applies).
• Running payroll properly, with PAYG withholding and super, the moment the company pays you or anyone else a wage.

None of this is hard, but most small companies pay a bookkeeper or accountant to keep it straight. Budget for that when you compare the two structures.

When to switch from sole trader to company

There is no rule that says you must incorporate at a certain size. The triggers that matter in practice are:

• You are hiring staff. Employees bring obligations and risk that most people prefer to hold inside a company.
• The work carries risk you could not personally absorb. If one bad job could cost more than your house, limited liability starts earning its keep.
• You are bringing in a partner. A company gives you a clean way to split ownership through shares and to set out who decides what. A handshake partnership does not.
• Your accountant tells you the income is high enough. They will look at your total income, what you need to draw out, and what you can leave in the business, and tell you whether the company rate actually saves you anything after all that.

Changing structure later is normal. You get a new ABN for the company, tell your clients and suppliers, update your invoices and your bank details, and transfer business assets across. Your accountant handles the timing so you do not end up with tax on the changeover itself.

Plenty of businesses never make the switch and never need to. A one-person cleaning round, for example, usually starts and stays as a sole trader, which is why our guide to starting a cleaning business in Australia does not spend long on company registration.

The business name rule everyone forgets

ASIC's rule is simple: you must register a business name if you run a business in Australia and are not trading under your own name. "Your own name" means your first name and surname and nothing else. On ASIC's business name registration page the example is John Smith, who does not need to register "John Smith" but does need to register "John Smith & Co".

The same logic applies to partnerships trading under all partners' personal names, and to companies trading under their exact registered company name. Everything else needs a business name registration. It is done online, it is cheap, and it is tied to your ABN, so get the ABN first.

Find an accountant before you decide

Everything above is general information, and the right structure depends on your income, your risk, your plans and your family situation. The accountant conversation costs an hour and is the highest-value hour of starting a business. Use our directory to find an accountant near you, ask them to compare sole trader and company for your actual numbers, and ask specifically about trusts if they do not raise it.

Once you have an ABN, whichever structure it belongs to, list your business on The Local List for free. We verify every listing against the Australian Business Register, so the ABN Verified badge on your listing shows customers you are a real, registered business from day one.