The moment usually arrives when the business stops being a side project. You are about to sign a three-year lease, a supplier wants trade terms, the bank has asked for security over your home, or your accountant has mentioned "asset protection" for the third time. Someone says the word "incorporate" and suddenly you are weighing two very different legal futures. How liability attaches to you personally is the core of that choice, and it is worth understanding before you sign anything.
The two structures on the table
For most Australian small businesses the realistic fork is between operating as a sole trader and operating as a proprietary company (a Pty Ltd). A sole trader is you, trading in your own name or a registered business name. A company is a separate legal person created under the Corporations Act 2001 (Cth), owned by its shareholders and run by its directors.
The question hiding inside "should I incorporate?" is narrower: is the liability protection a company actually gives you worth the money, paperwork and loss of flexibility, for this business, now? Two assumptions people bring to that question need correcting before you weigh anything. First, incorporating does not automatically protect you: lenders routinely ask directors of small companies to guarantee the company's debts, and the law holds directors personally liable in several situations a sole trader would never face. Second, the two structures are not a straight trade between "no protection" and "full protection". Both leave you exposed; the difference is in how and when.
The factors that should drive the decision
Who wears the debts if things go wrong
This is the factor everyone starts with, and it is genuinely the biggest difference. A company has the legal capacity and powers of an individual: it owns its own assets, owes its own debts, and enters its own contracts (s 124 of the Corporations Act 2001 (Cth)). The High Court has long treated that separation as real, holding in Walker v Wimborne (1976) 137 CLR 1 that the company is a separate legal entity from the people who own and run it. So a director is generally not personally liable for the company's debts. If the company cannot pay, creditors look to the company's assets, not the director's house.
A sole trader has no such separation. You and the business are one legal person, which is why the business.gov.au guide puts it bluntly: there is no division between business assets and personal assets, and assets in your name can be used to pay business debts. If the business collapses owing money, creditors can pursue your home, your car, your savings. This is the unlimited liability that defines the structure, and the two positions can be summarised as follows:
- Sole trader: unlimited liability; personal assets sit behind every business debt.
- Company: limited liability; the company's assets sit behind its debts, and directors are not personally on the hook just because they are directors.
When the company shield fails
The company structure protects you only up to a point, and the carve-outs are where owners get caught out. A director can be personally liable in at least five situations:
- Personal guarantees: if you guarantee a loan, lease or supplier account, you have signed a personal contract to pay if the company cannot. Banks and landlords ask for this constantly from small companies, and it quietly hands back much of the protection you incorporated for.
- Breach of directors' duties: directors must exercise care and diligence and act in good faith in the company's best interests (ss 180 and 181 of the Corporations Act 2001 (Cth)). Breaching them is a civil penalty matter and can also expose you to claims.
- Insolvent trading: under s 588G of the Corporations Act 2001 (Cth), a director must not let the company incur a debt when it is insolvent and there are reasonable grounds to suspect it. The liquidator can recover compensation from you personally for the loss (s 588M), and that recovery is not capped by what you put into the company.
- Phoenix activity: selling or moving company assets for less than they are worth so creditors miss out, sometimes called a creditor-defeating disposition, is specifically targeted. Such dispositions are voidable and the directors behind them face penalties (s 588FDB of the Corporations Act 2001 (Cth)).
- Unpaid tax and super: under the ATO's director penalty regime you can be made personally liable for the company's unpaid PAYG withholding, GST and superannuation guarantee charge if they are not reported and paid on time (ATO, Director penalties).
Notice what these have in common: the shield fails when you personally sign for a debt, when you run the company carelessly or dishonestly, or when you trade through insolvency. Run the company properly and pay the tax, and the shield mostly holds. Let those slip and your exposure starts to look a lot like a sole trader's.
The cost of running each structure
The liability difference is bought with money and time. A sole trader structure is cheap to run: an ABN is free to apply for, a business name costs $47 for one year or $108 for three years, and your business income is reported inside your individual tax return with no separate company return (business.gov.au).
A company carries recurring costs and obligations that people routinely underestimate:
- an ASIC registration fee to set the company up, and an annual review fee each year, both indexed every July;
- a mandatory separate business bank account, because company money is not your money;
- an annual statement from ASIC, a solvency resolution, and ongoing record keeping that supports your obligations as a director;
- formal decisions recorded as resolutions, not informal arrangements around the kitchen table.
None of that is prohibitive for a business that can absorb it, but it is a permanent overhead that a sole trader simply does not have. The relevant question is whether the liability protection is worth that overhead at your current stage of revenue and risk.
How the tax lands
Tax is where the two structures genuinely diverge, and the difference cuts both ways. As a sole trader your profits are taxed in your hands at the individual marginal rates: for 2025-26 that tops out at 45 cents for every dollar over $190,000, plus the 2% Medicare levy (ATO, Individual income tax rates). You pay that whether you draw the money out or leave it in the business.
A company pays tax on its profits at the corporate rate: 25% if it qualifies as a base rate entity, otherwise 30% (ATO, Company tax rates 2024-25). The catch is that the profit belongs to the company, not you. You reach it as salary, directors' fees or dividends, and each of those is taxed again in your hands at your personal rate. The company rate can look attractive on paper, but it mainly helps if you can legitimately leave profit inside the company rather than drawing it. If you are going to take everything out to live on, the corporate rate may save you little, and the extra accounting work is pure cost.
Raising money and looking credible
Lenders and trading partners price risk differently depending on your structure. A sole trader borrows as an individual, so the lender assesses your personal position and commonly takes security over your personal assets or asks for a guarantee. Either way your home can end up backing the business debt, which is exactly the exposure the company structure is meant to avoid.
With a company, the position is more nuanced. A company can issue shares, which gives you a way to bring in investors that a sole trader does not have, and a company structure often reads as more established to larger customers, franchisors or tender panels. But a small company with no trading history will find that banks still want the directors to guarantee the debt personally. The practical effect: for the first few years, you may carry company-style paperwork with sole-trader-style personal exposure, because the lender simply refuses to rely on the company's assets alone.
How an Artificer Legal lawyer helps you make the call
Choosing a structure on a tax comparison or a friend's advice is how most owners end up with the wrong one, and the correction is usually more expensive than the advice would have been. An Artificer Legal practitioner works through the decision with you rather than just filing the forms. We stress-test the assumptions behind your revenue and risk projections, and model the downside you are actually exposed to: what happens to your personal assets if the business fails, which debts are guaranteed, and whether the company shield would survive the way you intend to trade.
If incorporation is the right call, we help you act on it properly, by advising on how to structure the shareholding, drafting the constitution and any shareholders' agreement, reviewing the personal guarantees you are being asked to sign, and setting up the directors' duties, tax and reporting obligations so the shield holds when you need it. If staying a sole trader is right for now, we make sure you understand exactly what you are carrying, and we can plan the point at which restructuring becomes worth it. The goal is a decision based on your actual exposure, not on a headline rate or a generic checklist.
The choice most owners get wrong
The mistake that costs the most is incorporating for the liability protection and then signing it away piece by piece. Every personal guarantee you sign, every tax obligation that goes unpaid, and every debt incurred while the company is struggling hands a creditor a direct path to your personal assets. An owner who treats the company as a real separate entity, keeps its accounts and tax current, and refuses to guarantee more than they can afford to lose keeps the shield intact. An owner who treats the company as a personal bank account is a sole trader in disguise, with worse paperwork.
So the practical position is this: a director is generally not personally liable for the company's debts, while a sole trader is personally liable for all of them, with no line between business and personal assets. The company structure buys that protection with ongoing fees, formal obligations and directors' duties that carry their own personal consequences, and lenders will often ask you to guarantee the very debts you incorporated to escape. Sole trader and company are both workable structures, but they are not interchangeable. Weigh who wears the debts, when the shield fails, what each structure costs to run, how the tax lands and how you plan to raise money, and get advice before the lease, the loan or the guarantee is signed.