What is a sole trader structure and what are its limits?
A sole trader is the simplest setup available. You get an ABN, you start working, and there is one tax return to lodge each year. The ongoing cost of running it is low.
The problem is that you and the business are the same thing legally. If something goes wrong on a job, there is no separation between the business debt and your personal assets. Everything you own is on the line.
All income is taxed at your individual marginal rate. The more you earn, the more you pay, and there is very little room to manage that tax position. If you do not set money aside as you go, tax debts can snowball quickly, because the ATO may then require you to pre-pay the following year's tax as well.
Sole trader is suited to small, low-risk operations where one person is still working out the fundamentals of running a business. For anyone looking to grow, take on bigger clients, or protect personal assets, the structure has real limits.
How does a partnership differ from sole trader?
A partnership is essentially multiple sole traders operating together, up to 20 people pooling responsibility and resources. Setup and ongoing costs are similarly low. Each partner still pays tax at their individual rate on their share of the income, so the tax position is not meaningfully better than sole trader.
The significant risk is joint and several liability. If your partner causes a loss and cannot cover it, the full debt can fall on you, even if your profit split was 50/50. A clear partnership agreement is essential, and insurance coverage remains critical.
Partnerships are relatively uncommon. In most situations where joint ownership is the goal, a company or trust will offer the same collaboration with better protection.
Why do most growing trade businesses use a company structure?
A company is a separate legal entity. It can own assets, sign contracts, and borrow money in its own name. That separation is what creates limited liability: a creditor pursuing the business generally cannot pursue your personal home or savings in the same way they could with a sole trader.
Companies also carry more credibility with larger clients. Many commercial clients and suppliers actively prefer to deal with a company or trust structure, and some larger contracts will require it.
As a director and employee of your own company, you have genuine flexibility over how and when you take money out of the business, how much you pay yourself, and which projects you take on.
How does the company tax rate work?
Companies pay a flat tax rate of 25%. If you are a sole trader earning around $100,000 or more, your marginal rate will be pushing above that level, so a company structure may start to produce a better tax outcome.
Beyond the rate, the timing flexibility matters. A company retains its profits and pays tax at the company rate. You then decide when to pull those profits out. That means you can spread income across years, smooth out a high-earning year, or potentially offset a current profit against losses from a previous period. That kind of planning is not available to a sole trader.
The trade-off is higher compliance. A company requires full financial statements, ASIC registration, a separate tax return, and accurate record-keeping. The setup and ongoing costs are higher than a sole trader. The argument made in this lesson is that the tax advantages and liability protection tend to outweigh those costs over the long term.
Note that limited liability does not cover everything. Employee entitlements, superannuation, and withheld wages tax remain a personal responsibility of the director regardless of structure.
What does a trust structure offer that a company does not?
A trust is not a separate legal entity in the same way a company is. A trustee holds assets for the benefit of beneficiaries. To get liability protection inside a trust, you generally set up a company to act as the corporate trustee.
The main advantage of a trust, particularly a discretionary or family trust, is income distribution flexibility. Each year you can decide how profits are split among beneficiaries, which allows you to make use of different individuals' marginal tax rates and arrive at a more tax-effective outcome than a flat company rate alone.
Trusts are also useful for succession planning and business continuity. Like a company, a trust can continue operating beyond the life of any individual trustee or beneficiary, making it easier to sell or hand over the business.
The downside is complexity and cost. A trust has the highest setup cost of the four structures, requires its own tax return, and needs professional involvement from an accountant to use properly.
How do you choose the right structure for your situation?
The key factors to weigh up are liability exposure, the complexity you are willing to manage, setup and ongoing cost, compliance requirements, how you want to handle profit, tax efficiency, and how you appear to potential clients and commercial partners.
Sole trader carries the least protection and the least flexibility. Trust structures offer the most tax planning options but are the most complex and expensive. Company sits in the middle and suits most growing trade businesses well.
The final step, once you have a sense of what your business needs, is to sit down with your accountant or financial adviser and discuss your specific operations, personal circumstances, and growth plans before making a decision.
