Sole Trader, Company, or Trust? Choosing the Right Business Structure

One of the first and most consequential decisions any business owner makes is how to structure the business. It's also one of the most commonly revisited too late — many business owners start as a sole trader for simplicity, then realise years later that the structure no longer fits the size, risk, or tax position of the business. Understanding the trade-offs upfront, and knowing when to revisit the decision, can save significant tax and reduce real risk.

Sole trader: simple, but exposed

Operating as a sole trader is the simplest and cheapest way to start a business. There's no separate registration beyond an ABN, minimal ongoing compliance, and business income is simply added to your individual tax return.

The trade-off is liability. As a sole trader, there's no legal separation between you and the business — if the business is sued or can't pay its debts, your personal assets are exposed. There's also no flexibility in how profit is taxed; everything is taxed at your individual marginal rate, which can become inefficient once profits grow beyond the lower tax brackets.

Sole trader structures work well for low-risk businesses in their early stages, particularly service-based businesses with minimal liability exposure and modest profit levels.

Partnerships: shared structure, shared risk

A partnership involves two or more people (or entities) carrying on a business together, with income and losses split according to a partnership agreement. Like a sole trader structure, a partnership itself doesn't pay tax — profits flow through to each partner's individual return, taxed at their personal marginal rate.

The major risk with a standard partnership is joint and several liability: each partner can be personally liable for the debts and obligations of the partnership, including those caused by another partner's actions. This makes a clear, well-drafted partnership agreement essential, and for higher-risk ventures, often makes a partnership a less attractive option than alternatives below.

Companies: liability protection and flat tax rate

A company is a separate legal entity from its owners (shareholders) and directors. This separation is the main appeal: in most circumstances, shareholders' personal assets are protected from the company's debts, beyond their investment in shares (though directors can still be personally liable in specific circumstances, such as trading while insolvent or unpaid superannuation guarantee amounts).

From a tax perspective, companies pay a flat company tax rate (currently 25% for base rate entities, 30% otherwise), rather than the individual marginal rates that apply to sole traders and partners. This can be a significant advantage once profits grow large enough that the individual marginal rate would otherwise exceed the company rate — profits can be retained in the company and taxed at the lower rate, rather than distributed and taxed at a higher personal rate.

The trade-offs are increased compliance (annual financial statements, ASIC obligations, company tax returns) and more complexity extracting money from the business — dividends, director fees, or loans all carry specific tax treatment that needs to be managed carefully.

Trusts: flexibility, with complexity

A discretionary (family) trust doesn't pay tax itself in most circumstances; instead, a trustee distributes income to beneficiaries, who then pay tax on that distribution at their own marginal rate. This creates significant flexibility — income can be distributed each year to whichever beneficiaries are in the lowest tax brackets, within the rules, potentially reducing the overall tax paid by the family group.

Trusts also offer a degree of asset protection, since assets are held by the trustee on behalf of beneficiaries rather than directly by any one individual.

The complexity comes in trustee duties, the requirement to make and document distribution decisions correctly each year before 30 June, and ongoing compliance costs that are generally higher than a simple sole trader or partnership structure. Trusts are also subject to specific anti-avoidance rules around distributions to minors and certain related entities, which need to be navigated carefully.

Combining structures

Many established businesses don't use a single structure in isolation — a common approach for growing businesses is a company (often owned by a trust) operating the business, providing both liability protection and tax planning flexibility. The right combination depends heavily on the specific business, its risk profile, growth plans, and the personal circumstances of the owners, which is why this is rarely a decision to make from a generic checklist.

Signs it's time to reconsider your structure

A few common signals suggest a structure review is overdue:

- **Profit has grown past the point where your marginal tax rate exceeds the company tax rate** — the gap between personal and company tax rates is one of the most common reasons businesses convert from sole trader to company structures. - **The business has taken on meaningful liability risk** — larger contracts, employees, equipment, or premises that weren't there in the early, low-risk days. - **You're bringing on a business partner or investor**, which often requires a more formal structure than an informal sole trader arrangement. - **You're planning to sell the business or bring in family members**, both of which are significantly easier to manage with the right structure already in place. - **Asset protection has become a genuine concern**, whether due to the nature of the work or simply the growing value tied up in the business.

Restructuring isn't necessarily a fresh start

A common misconception is that changing structure means starting from scratch — closing one business and opening another. In many cases, existing structures can be restructured with specific tax relief (such as small business restructure rollover relief) that allows assets to move between structures without triggering capital gains tax, provided the conditions are met. This makes the decision to restructure less daunting than it often appears, but it absolutely requires proper advice — getting the mechanics wrong can inadvertently trigger the very tax consequences the relief is designed to avoid.

There's no universally "best" structure

Despite how often the question is asked, there's no single best business structure — only the structure that best fits a specific business's risk profile, profit level, growth plans, and ownership intentions at a given point in time. The right answer for a sole consultant earning $90,000 a year looks nothing like the right answer for a construction business with five employees and growing contract values.

How ATA Accountants can help

We work with businesses at every stage — from helping new businesses choose the right structure from day one, to reviewing and restructuring established businesses that have outgrown their original setup. We'll model the actual tax outcome of each option for your specific numbers, not just explain the structures in the abstract.

**Book a consultation** to find out whether your current structure is still the right one.