When the structure question stops being theoretical
The structure question stops being an item on a to-do list the moment your first customers are paying regularly, a second founder is seriously on board, or an investor asks how they would "get in". That is the point where the way your business is set up starts deciding real things: how much of your personal assets sit behind the business, how profits are taxed, who gets to make which calls, and whether you can sell equity at all.
The real question is not whether to incorporate "one day". It is which structure to operate through now, given the liability you are taking on, the way you plan to fund growth, and who else is in the business with you. Answering it deliberately costs an afternoon of thought and almost nothing in fees. Answering it badly, or letting it be answered by default, can mean restructuring later at real cost: capital gains tax on moving assets, re-papering contracts, reassigning intellectual property, and months of distraction while you are trying to grow.
Your options: sole trader, partnership or company
In Australia the three main structures are the sole trader, the partnership and the company. A sole trader is one person who owns and runs the business themselves, with income reported in their individual tax return. A partnership is two or more people carrying on a business together and sharing its profits. A company is a separate legal entity registered with the Australian Securities and Investments Commission (ASIC) that comes into existence as a body corporate on registration, under s 119 of the Corporations Act 2001 (Cth).
Two things about these options are worth flagging before you weigh them. First, the real poles are the sole trader and the company; the partnership sits between them and is frequently chosen by accident. An informal partnership can arise the moment two people start carrying on business together and sharing the profits, even with no paperwork and no partnership agreement, because that is what the law recognises as a partnership. Second, a company is the only one of the three that can issue shares. If you want to take equity investment, grant equity to employees, or structure a buyout, you will need a company to do it in. A sole trader or partnership has no share capital, so raising equity means restructuring into a company first, usually at the busiest possible moment.
Five factors to weigh before you choose
What you personally stand to lose
Liability is usually the first factor founders think about, and for good reason. A sole trader and the business are the same person for liability purposes: business debts are your debts, and a creditor can reach your home, your savings and your other assets.
A partnership does not change that exposure; it multiplies it. Partners are personally liable for the debts and obligations of the firm incurred while they are partners, jointly with the other partners, under s 9 of the Partnership Act 1892 (NSW). For wrongs committed in the course of the business, liability is joint and several under s 12 of the same Act, which means an aggrieved customer or supplier can pursue any one partner for the whole amount. Your partnership agreement can shift responsibility between partners internally, but it cannot stop an outsider coming after you.
A company is different in kind. It is a separate legal entity, and shareholders are generally not liable for the company's debts beyond what they have agreed to pay for their shares. But the shield is not absolute. Directors owe statutory duties of care and diligence and good faith under the Corporations Act 2001, and lenders, landlords and major suppliers routinely ask founders to sign personal guarantees, which puts personal assets back on the line.
- Sole trader: your personal assets are fully exposed to the business's debts.
- Partnership: your personal assets are exposed to the firm's debts, including debts incurred by your partner.
- Company: your liability is generally limited to what you have put in, unless you sign personal guarantees or breach your duties as a director.
How the tax lands on you
For a sole trader, business profits are simply taxed in your own hands at your marginal rate. In a partnership, the partnership lodges a return but does not pay tax on its profits; each partner pays tax on their share, which is convenient if partners are on different marginal rates or have different offsetting losses.
A company is taxed separately, at the corporate rate. Base rate entities, broadly companies with aggregated turnover under $50 million that meet a passive income test, currently pay 25%; other companies pay 30%. Profits are then distributed to shareholders as dividends, usually with franking credits attached. Losses stay inside the company rather than offsetting your personal income.
- Sole trader or partnership: profits flow through to your personal return; losses can offset other personal income, subject to the usual rules.
- Company: the company pays tax first, then you pay tax on dividends; you have more flexibility about when and at what rate you draw income, but the accounting is heavier.
- GST is separate from all of this: registration turns on turnover, not structure. You must register when your GST turnover reaches $75,000 ($150,000 for non-profits), or immediately if you provide taxi or ride-sourcing services, and you have 21 days to register once you cross the threshold. Your accountant should confirm the rate and registration that apply to you.
Whether you can take investment and issue equity
If your plan involves outside capital, this factor can decide the question on its own. Investors buy equity, and only a company has shares to sell. Angel investors, venture capital funds and equity crowdfunding platforms all expect to invest into a company, usually one with a constitution and a shareholders agreement that sets out how decisions are made and how shares vest.
A sole trader or partnership can take on debt, and a partnership can take on another partner, but there is no share capital to offer and no clean way to give an outsider a proportional stake. Converting to a company later is possible, but it happens precisely when you have customers, contracts and assets in place, which makes the conversion slower and more expensive. There is also a credibility dimension: many corporate and government customers prefer to contract with a company, and a Pty Ltd name signals a degree of permanence that a sole trader simply does not have.
The compliance load you can carry
The three structures differ sharply in ongoing administration. A sole trader needs an ABN, a business name registration if they trade under anything other than their own name, and an individual tax return. A partnership is similar, plus a partnership return and an agreement that reflects the deal between the partners.
A company is a different order of obligation. It needs at least one director who ordinarily resides in Australia, under s 201A of the Corporations Act 2001. Its internal management must be governed by a constitution or by the replaceable rules in the Corporations Act 2001, under s 134, and the company must keep registers, records and minutes, lodge its annual review with ASIC, and its directors must discharge their statutory duties. Small proprietary companies have lighter financial reporting, but the governance duties remain.
- Sole trader: ABN, optional business name, individual tax return.
- Partnership: ABN, optional business name, partnership tax return, and ideally a written partnership agreement.
- Company: ASIC registration and annual review, a resident director, constitution or replaceable rules, registers and minutes, and director duties.
It is also worth knowing what structure does not change. Consumer guarantees under the Australian Consumer Law (ACL), which is Schedule 2 of the Competition and Consumer Act 2010 (Cth), apply to any business that sells goods or services to consumers, whatever its structure: goods must be of acceptable quality under s 54 of the ACL and services must be supplied with due care and skill under s 60. Data protection under the Privacy Act 1988 (Cth) similarly tracks turnover and activity, not structure: the small business exemption applies to businesses with annual turnover of $3 million or less in the previous financial year, but some small businesses, such as health service providers, are covered regardless. Choosing a structure is not a way to opt out of these obligations.
How you lock in co-founders and exits
If more than one person is in the business, the default rules are thin. For a partnership, the Partnership Act 1892's default terms apply unless you agree otherwise. For a company, the replaceable rules apply unless a constitution displaces them. Neither set of defaults reflects what you actually agreed about who does what, who owns what percentage, how equity vests, who makes the final call, and what happens when someone leaves or falls out.
That is why the documents matter as much as the structure. A partnership agreement, or a shareholders agreement with a constitution for a company, should cover ownership splits, decision-making, vesting of equity, exit and dispute processes. The same documents should deal with intellectual property: contracts with founders, employees and contractors must assign the IP they create to the business entity, because otherwise ownership follows the creator, not the business. A structure chosen without these documents is a structure that will be defined by its disputes.
Getting the call right with Artificer Legal
This is a decision where founders routinely get unstuck on three things: assuming the liability shield will hold when personal guarantees have hollowed it out; defaulting into a company without understanding the director duties and compliance that come with it; and running a partnership for years with no agreement until a falling out makes the gaps obvious. Each of those is cheap to fix at the start and expensive to fix later.
An Artificer Legal practitioner helps with both the decision and the paperwork. We stress-test the assumptions behind your choice, which usually means the real liability exposure in your industry, the actual funding path, and the genuine state of the founder arrangements, not the optimistic version. We model the downside of each option against your facts, so you are choosing with your eyes open about what happens if a customer sues, a partner leaves, or an investor asks for something. And once the call is made, we act on it: drafting the partnership agreement or the shareholders agreement and constitution, preparing the founder and IP assignment documents, reviewing the employment and contractor contracts, and coordinating with your accountant so the tax structuring lines up with the legal structure.
The decision that costs most to defer
The mistake that costs startups most is not picking the "wrong" structure in the abstract. It is deferring the decision and letting the structure be set by default, through a handshake partnership with no agreement, or a rush of personal guarantees signed without anyone explaining the trade. Structure compounds: every contract, hire and investment made under one structure has to be revisited when you change it, and the liability shield only works if you actually respect it, which means not signing it away and not neglecting the duties that come with it. The cheapest moment to make this decision, and to document it properly, is now, before the paper trail and the assets accumulate.
The essentials to carry with you are these. The three main structures are the sole trader, the partnership and the company, and the poles are the sole trader's simplicity and the company's separate legal personality. A sole trader carries unlimited personal exposure but almost no compliance. A partnership carries the same personal exposure, now shared with partners, and needs a written agreement to be workable. A company limits your liability, lets you issue shares and read as established, but carries real governance duties and compliance costs, and its protection is only as good as your discipline with guarantees. Tax, GST and the consumer, privacy and employment obligations track your activity and turnover more than your structure, so get advice on them alongside the structure choice. Set the documents up with the structure, not after it. That is where a lawyer earns their fee, and where a founder saves the year of distraction that restructuring costs.