Business Structures in Australia: A Simple Guide

October 16, 2025

Simon Madziar

Simon Madziar

Starting a new business is an exciting venture, but it comes with a long list of critical decisions. One of the most fundamental choices you'll make is selecting the right business structure. This decision will impact your tax obligations, personal liability, compliance requirements, and your ability to grow. We understand that navigating the complexities of Australian business law can feel overwhelming, especially when you're focused on bringing your vision to life.

This guide is designed to simplify the process. We'll walk you through the four most common business structures in Australia, explaining how each one works in plain English. By the end, you'll have a clearer understanding of your options and be better equipped to choose a structure that provides both protection and flexibility for your new enterprise.

What is a Sole Trader?

The simplest and most common business structure in Australia is the sole trader. As a sole trader, you are the business. You control and manage it entirely, and there's no legal distinction between you and the business itself.

This means you're entitled to all the profits after tax, but you are also personally responsible for all business debts and liabilities. You trade under your own name or can register a business name. You'll use your personal Tax File Number (TFN) to lodge your income tax return but will need an Australian Business Number (ABN) to operate.

Advantages of a Sole Trader Structure

  • Simple and Inexpensive to Set Up: It's the easiest and cheapest structure to establish, with minimal legal and administrative requirements.
  • Complete Control: You have full authority over all business decisions without needing to consult partners or a board.
  • Easy to Wind Up: If you decide to cease trading, the process is straightforward.
  • Privacy: Financial information is not publicly available.

Disadvantages of a Sole Trader Structure

  • Unlimited Liability: This is the most significant drawback. Your personal assets (like your home or car) are at risk if the business incurs debt or faces legal action.
  • Limited Access to Capital: It can be harder to secure funding, as banks may see sole traders as higher risk. You can't sell shares to raise capital.
  • Limited Lifespan: The business effectively ends if you stop working, retire, or pass away.
  • Higher Personal Tax Rates: As your business income grows, you'll be taxed at marginal personal income tax rates, which can be higher than the flat company tax rate.

When is a Sole Trader Structure Suitable?

This structure is often a good fit for small, low-risk businesses, freelancers, contractors, and individuals who are just starting out. If you're testing a business idea or operating a side hustle with minimal overheads, the simplicity of being a sole trader is very appealing.

What is a Partnership?

A partnership is a business structure where two or more people (or entities) run a business together. Like a sole trader, it's relatively easy to set up. Each partner contributes to the business—whether it's money, skills, or assets—and shares in the profits and losses.

The income from the business is distributed to the partners, who then pay tax on their share at their individual tax rates. The partnership itself lodges a separate tax return to report its income but does not pay tax directly.

Advantages of a Partnership Structure

  • Easy and Inexpensive to Set Up: Similar to a sole trader, the setup costs are low.
  • Shared Responsibility: You can pool skills, knowledge, and resources with your partners.
  • Greater Borrowing Capacity: With more owners, a partnership may find it easier to secure loans than a sole trader.
  • Privacy: Financial details are generally kept private.

Disadvantages of a Partnership Structure

  • Unlimited Liability: All partners are personally liable for business debts. This liability is typically 'joint and several,' meaning each partner can be held responsible for the full amount of a debt, not just their share.
  • Potential for Disputes: Disagreements between partners can disrupt the business if there isn't a clear framework for resolution.
  • Shared Profits: You must share the profits with your partners according to the partnership agreement.
  • Complex to Exit: If a partner leaves or a new one joins, the partnership may need to be dissolved and reformed.

The Importance of a Partnership Agreement

While not legally mandatory, a formal Partnership Agreement is crucial. This written document outlines the rights and responsibilities of each partner, including how profits and losses are shared, how decisions are made, and what happens if a partner wants to leave. It can prevent misunderstandings and provide a clear path forward during disputes.

When is a Partnership Structure Suitable?

A partnership can work well for professionals who want to team up, such as lawyers, accountants, or doctors. It's also suitable for family businesses or joint ventures where a shared skill set adds significant value. However, it's vital that you choose partners you trust implicitly due to the unlimited liability.

What is a Company?

A company is a separate legal entity from its owners (shareholders). This is the most significant difference from sole traders and partnerships. As a separate entity, a company can incur debt, own assets, enter into contracts, and sue or be sued in its own name. It's run by directors who are responsible for its management.

In Australia, the most common type for small to medium businesses is the Proprietary Limited (Pty Ltd) company. It must have at least one shareholder and director and cannot have more than 50 non-employee shareholders.

Advantages of a Company Structure

  • Limited Liability: This is the key benefit. Shareholders' liability is generally limited to the value of their shares, protecting their personal assets from business debts.
  • Separate Legal Entity: The business has a life of its own, continuing to exist even if the owners change.
  • Access to Capital: It's easier to raise funds by selling shares to investors.
  • Favourable Tax Rate: The company pays tax at a flat corporate tax rate, which is often lower than the top marginal personal tax rates.
  • Perceived Credibility: A company structure can appear more professional and established to clients, suppliers, and lenders.

Disadvantages of a Company Structure

  • More Complex and Expensive to Set Up: Registration and setup involve more steps and higher costs.
  • Strict Reporting and Compliance: Companies must adhere to the Corporations Act 2001, which includes annual reporting to the Australian Securities and Investments Commission (ASIC) and holding regular meetings.
  • Less Control for Founders: As you bring in more shareholders, your personal control over the business may be diluted.
  • Profits Belong to the Company: Profits can only be distributed to shareholders as dividends, which can be a more complex process than simply drawing funds from the business.

When is a Company Structure Suitable?

A company structure is ideal for businesses that are planning to grow, seeking outside investment, or operating in a medium-to-high-risk industry. If protecting your personal assets is a top priority, the limited liability offered by a company is a powerful incentive.

What is a Trust?

A trust is a legal arrangement where a person or company (the trustee) holds and manages assets for the benefit of others (the beneficiaries). The trustee has a legal duty to act in the best interests of the beneficiaries. A trust is not a separate legal entity, but it is treated as one for tax purposes.

The two main types for business are:

  • Discretionary Trust (or Family Trust): The trustee has the discretion to decide which beneficiaries receive income or capital from the trust and in what proportions each year.
  • Unit Trust: The interests in the trust are divided into units, similar to shares in a company. Beneficiaries (unitholders) receive income and capital in proportion to the number of units they hold.

Advantages of a Trust Structure

  • Asset Protection: A trust can provide a high level of protection for business assets from the liabilities of beneficiaries.
  • Tax Flexibility (Discretionary Trusts): The ability to distribute income among beneficiaries in a tax-effective way is a major advantage. For example, income can be directed to family members on lower tax brackets.
  • Confidentiality: Trust deeds are not publicly available, offering a high degree of privacy.

Disadvantages of a Trust Structure

  • Complex and Costly to Set Up and Maintain: Trusts are the most complex of the four structures to establish and administer, requiring expert legal and accounting advice.
  • Losses are Trapped: Any business losses incurred by the trust generally cannot be distributed to beneficiaries to offset their other income.
  • Strict Regulations: Trustees have significant legal obligations and can be held personally liable for breaches of their duties.
  • Limited Access to Capital: It can be difficult to raise external capital with a trust structure.

When is a Trust Structure Suitable?

A trust is often used for family businesses seeking to protect assets and distribute income flexibly among family members. It's also common for holding investments like property or shares. Due to its complexity, it is best suited for those with significant assets to protect and a clear understanding of the administrative burden involved.

Business Structure Comparison

 

FeatureSole TraderPartnershipCompanyTrust
Legal EntityNoNoYesNo (Trustee holds assets)
LiabilityUnlimitedUnlimitedLimitedLimited to Trustee
Setup CostLowLowHighHigh
ComplexityLowLow-MediumHighVery High
TaxPersonal ratesPersonal ratesCompany rateBeneficiaries' rates
ControlFullSharedBoard/ShareholdersTrustee
LifespanLimitedLimitedPerpetualDefined in deed
Best ForFreelancers, start-upsProfessionals, family bizGrowth-focused bizAsset protection, families

Making the Right Choice for Your Business

Choosing the right structure isn't just a box-ticking exercise. It's a strategic decision. Consider these factors:

  • Risk and Liability: How much personal risk are you willing to take on? If you're in a high-risk industry, a company structure might be non-negotiable.
  • Cost and Complexity: Do you have the time and resources for the ongoing compliance of a company or trust?
  • Future Plans: Do you plan to raise capital, bring in partners, or eventually sell the business?
  • Tax Implications: How can you structure your business to be as tax-efficient as possible, both now and in the future?

Your Next Steps

Choosing your business structure is one of the most important foundations you'll lay for your enterprise. Each option has distinct advantages and trade-offs related to liability, cost, control, and tax. The sole trader offers simplicity, the partnership provides collaboration, the company delivers protection, and the trust offers flexibility and asset security.

While this guide provides a clear overview, it is not a substitute for tailored professional advice. The right choice depends entirely on your personal circumstances, industry, and long-term ambitions. We strongly recommend discussing your situation with a qualified accountant and lawyer to ensure you start your journey on the most stable and secure footing possible. With the right structure in place, you can build your business with confidence and peace of mind.

Looking for help with your accounting, bookkeeping or taxes? Mahler Advisory your Gold Coast small business accountant can help! Click the call button or schedule a online appointment with us.


Disclaimer: This blog post is for informational purposes only and does not constitute legal or financial advice. You should consult with a qualified legal, financial, or tax advisor before making any decisions about your business structure. Laws and regulations are subject to change. We are not liable for any actions taken based on the information provided in this post.

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