The four main business structures in Australia are sole trader, partnership, company and trust. Each differs in how it is taxed, the level of asset protection it offers, and its cost and complexity. Many established businesses combine structures, such as a company owned by a family trust, to balance tax and protection.

Choosing the right business structure in Australia is one of the most consequential decisions you will make as a business owner. Your structure determines how much tax you pay, who bears personal liability if something goes wrong, how much compliance is involved, and how difficult — and costly — it will be to change course later.

This guide covers every major structure available in Australia: sole trader, partnership, company, family trust, trust with corporate trustee, and bucket company. Read it before you commit — or before you assume your current structure is still the right one.

Why Your Business Structure Matters More Than You Think

Your business structure is not just a legal formality. It directly affects:

• How much income tax you pay — and at what rate
• Whether your personal assets are exposed to business risk
• How flexibly you can distribute income across your family
• Your ability to attract investment or bring in new partners
• The compliance costs you carry every year
• Whether a future sale triggers unnecessary CGT

Many business owners start as sole traders because it is the simplest option. That is often appropriate at the beginning. But as revenue grows, as assets accumulate, and as complexity increases, the wrong structure can cost you tens of thousands of dollars in avoidable tax — or leave your personal assets exposed to business liabilities.

At Pinnacle Accounting & Advisory, we regularly help Melbourne business owners review their structure before problems arise — not after.

Sole Trader

A sole trader is the simplest and most common business structure in Australia. The business and the individual are legally the same entity — there is no legal separation between you and the business. You operate under your own name or a registered business name, and you report all business income in your individual tax return.

The ATO outlines sole trader tax obligations here.

Pros

• Simple and inexpensive to establish
• Low ongoing compliance costs
• Full control over decision-making
• Losses can offset other personal income

Cons

• Unlimited personal liability — your home, car, and savings are all at risk
• Taxed at individual marginal rates, up to 47% including the Medicare levy
• No ability to split income with family members
• Can be harder to attract investors or business partners

When it is right

A sole trader structure suits someone starting out with low risk, modest income, and minimal assets to protect. Freelancers, tradespeople in the early stages, and consultants testing a concept often begin here.

When you have outgrown it

Once your taxable income consistently exceeds $120,000, or once you have personal assets worth protecting, it is worth reviewing whether a company or trust structure would serve you better. See our Australian income tax rates guide for 2025–26 to understand at what income point the company tax rate becomes more advantageous. If your annual turnover exceeds $75,000, you must also register for GST regardless of your structure. Many sole traders make this transition as income grows — our guide to converting from sole trader to company covers the process, tax implications, and how to avoid triggering unnecessary CGT.

Partnership

A partnership involves two or more individuals — or entities — carrying on a business together with a view to profit. The partnership itself does not pay income tax. Instead, each partner reports their share of the net partnership income or loss in their own individual tax return, and the partnership lodges an annual partnership tax return as an informational document.

The ATO’s guidance on partnership distributions is available here.

Key features

• Shared control and shared responsibility
• Each partner pays tax on their own share of profit at their personal marginal rate
• Partners can contribute different amounts of capital and receive different profit shares

The joint liability risk

The most significant consideration in a partnership is that each partner is jointly and severally liable for the debts of the partnership. If your business partner incurs a liability, you can be held personally responsible for the full amount — not just your share. This exposure is one of the primary reasons many business owners choose a company or trust structure instead.

When a partnership agreement is essential

A formal, legally drafted partnership agreement is not optional — it is essential. It must address profit-sharing ratios, decision-making authority, what happens when a partner exits or dies, and how disputes are resolved. Without one, the default rules under the relevant state Partnership Act apply, which are rarely appropriate for modern commercial arrangements.

Company Structure in Australia

A company is a separate legal entity — entirely distinct from its shareholders and directors. It can own property, enter contracts, employ staff, and be sued in its own right. This separation is what gives a company its core advantage: limited liability for shareholders.

Tax rate

Base rate entities — companies with aggregated turnover below $50 million that derive no more than 80% of assessable income from passive sources — pay company tax at 25%. Larger companies pay 30%. The ATO publishes current company tax rates here.

Limited liability

Shareholders are generally not personally liable for the company’s debts beyond their paid-up share capital. This is a key reason business owners with growing revenue or significant business risk transition from a sole trader or partnership into a company.

Compliance obligations

• Lodge an annual company income tax return with the ATO
• Meet ASIC annual review requirements and pay the annual review fee
• Register for PAYG withholding if employing staff
• Maintain financial records and prepare financial statements
• Directors carry statutory duties that cannot be delegated

A company structure also enables the use of franking credits, which can be advantageous for Australian resident shareholders receiving dividends. See our comparison: company vs trust — which business structure is right for you? If your income is mainly a reward for your personal skills or efforts, the ATO’s personal services income (PSI) rules may override the tax advantages of a company structure — check our PSI guide before deciding on structure.

Family Trust

A family trust — technically a discretionary trust — is a structure in which a trustee holds and manages assets on behalf of a group of beneficiaries, typically family members. The trustee has complete discretion over how much income each beneficiary receives each year. This flexibility is what makes family trusts one of the most powerful tax planning and asset protection tools available in Australia.

The ATO’s guidance on trusts, trustees, and beneficiaries is available here.

Why business owners use family trusts

• Income splitting: Distribute income to family members on lower marginal tax rates, reducing the overall family tax burden
• Asset protection: Assets held in a trust are generally not owned by any individual, which can offer protection from creditors
• CGT discount: Trusts held for more than 12 months can access the 50% CGT discount when distributing capital gains to individual beneficiaries
• Wealth planning: Trusts can hold and grow wealth across generations within the family group

30 June resolutions — a critical deadline

The trustee must make a formal income distribution resolution before 30 June each financial year. Missing this deadline means the trustee is assessed on the entire trust income at the top marginal rate of 47% — an entirely avoidable outcome. A family trust is not a set-and-forget structure. It requires active annual management.

Learn how to establish one correctly: How to set up a family trust in Australia.

Trust with Corporate Trustee

A trust with a corporate trustee is a widely used combination for established business owners and investors. Rather than an individual acting as trustee, a company is appointed to that role — typically a company incorporated for that purpose alone.

Why use a corporate trustee?

• Enhanced asset protection: Because the trustee is a company rather than an individual, personal assets of the directors are generally not directly at risk in relation to trust liabilities
• Continuity: A company does not die, retire, or become incapacitated. The trust continues seamlessly regardless of changes to individuals
• Cleaner governance: Directors of the trustee company control operations; beneficiaries receive distributions — creating a clear separation of roles
• Creditor protection: Assets held by a corporate trustee are more difficult for personal creditors of the individual director to reach than assets held by an individual trustee

How the structure works

The typical arrangement involves a trustee company incorporated specifically to act in that capacity. The trust itself holds the business or investment assets. The trustee company is controlled by the business owners as directors, and family members — or another entity such as a family trust — are named as beneficiaries.

Costs and compliance

This structure involves two entities — a company and a trust — each with their own compliance requirements: two tax returns, ASIC annual fees for the trustee company, and a more involved annual administration process. For established businesses with meaningful assets, however, the protection benefits typically far outweigh the additional cost. This is the structure most commonly recommended at Pinnacle Accounting & Advisory for business owners with revenue above $400,000 or significant personal assets to protect. For a detailed comparison of the two trustee options, see our guide: corporate trustee vs individual trustee.

Bucket Company

A bucket company is a company that is named as a beneficiary of a family trust and used to cap the tax rate on trust distributions. Rather than distributing all trust income to individual beneficiaries — who may be taxed at rates up to 47% — the trustee distributes a portion of income to the bucket company, which pays tax at the 25% company rate where it qualifies as a base rate entity. A distribution from a trading trust keeps its trading character, so the company normally qualifies; where the trust’s income is mainly rent, dividends or capital gains, the rate is 30% instead.

How it works

At year-end, the trustee makes a resolution to distribute a share of trust income to the bucket company. That income is taxed at 25% — a potential saving of up to 22 percentage points compared to the top individual marginal rate. The retained profits sit inside the company and can be reinvested, used to fund business operations, or eventually distributed to shareholders as franked dividends.

Key considerations

• The bucket company must be a genuine beneficiary under the trust deed — it cannot be added retrospectively without a deed amendment
• An unpaid present entitlement (UPE) owed to the bucket company is not itself a Division 7A loan, following Commissioner of Taxation v Bendel [2026] HCA 18, decided 10 June 2026. What still needs managing is Subdivision EA, which can deem a dividend where the trust pays money to, lends to, or forgives a debt of a shareholder of the bucket company or their associate while the entitlement is outstanding, and section 100A, which still applies to reimbursement agreements
• The strategy works best when profits are not needed personally in the short term

For a detailed breakdown of how this strategy works, who it suits, and how to avoid the common pitfalls, see our dedicated guide: Bucket company tax savings in Australia.

Which Structure Is Right for You?

There is no universal answer. The right structure depends on where you are in your business journey, your income level, your family situation, and what you are trying to protect. The following framework is a starting point — not a recommendation — for your conversation with an adviser.

• Just starting out, low income, low risk: A sole trader structure may be appropriate while you test and validate the concept
• Growing revenue, starting to accumulate assets: Consider a company or a discretionary trust with a corporate trustee
• Family business with multiple income earners: A family trust gives you flexibility to distribute income to members on lower rates
• High-profit business wanting to cap tax at 25%: A bucket company in conjunction with a family trust is worth exploring, provided the company qualifies as a base rate entity
• Significant personal assets to protect: A corporate trustee structure provides the strongest separation between personal and business risk

Structure decisions also interact with your superannuation strategy, property ownership, and long-term succession planning. That is why structure reviews should always be done holistically — not in isolation.

The Cost of Getting It Wrong

One of the most common and costly mistakes we see is business owners who grow significantly before reviewing their structure — and then face an expensive, disruptive restructure.

Restructuring after the fact typically involves:

• Capital Gains Tax (CGT): Transferring assets between entities is often a CGT event. Depending on the asset and the gain, the tax cost can be substantial
• Stamp duty: In some states, transferring business or property assets between entities triggers stamp duty obligations
• Legal and accounting fees: Restructuring requires new trust deeds, company incorporations, business name transfers, and updated banking arrangements and contracts
• ATO scrutiny: Restructures can attract ATO attention if not handled correctly, particularly where the timing or purpose of the arrangement raises questions

There are rollover concessions and the ATO’s small business restructure rollover provisions that can assist in some circumstances — but they carry strict eligibility criteria and are not always available. The far simpler and less expensive approach is to structure correctly from the outset.

Frequently Asked Questions

What is the most tax-effective business structure in Australia?

It depends on your income, family situation, and long-term goals. For many established businesses, a discretionary trust distributing to individual beneficiaries and a bucket company offers the most flexibility and the lowest effective tax rate. But tax efficiency is only one consideration — asset protection, compliance cost, and succession planning all matter equally.

Can I change my business structure later?

Yes, but it can be expensive. Restructuring may trigger CGT, stamp duty, and significant professional fees. The ATO’s small business restructure rollover can assist in some cases, but it has strict eligibility conditions. Getting the structure right early is almost always more cost-effective than restructuring once you have grown.

Do I need a trust to protect my personal assets?

A trust — particularly one with a corporate trustee — is one of the most effective asset protection tools available in Australia. It is not the only option: a company also provides limited liability protection. However, trusts offer additional flexibility for income distribution and long-term wealth planning that a company alone cannot provide. Your specific needs should always be assessed individually.

What is the difference between a family trust and a company?

A company is a separate legal entity that pays tax at the corporate rate (25% for base rate entities). A family trust is not a legal entity — it is a legal relationship. The trust does not pay tax itself; income is distributed to beneficiaries who pay tax at their own marginal rates. Trusts offer income-splitting flexibility; companies offer limited liability and the ability to pay franked dividends. Many business owners use both structures together. See our full comparison: company vs trust — which business structure is right for you?

How much does it cost to set up a company or trust in Australia?

Company incorporation through ASIC involves a government fee (currently $597 for a standard proprietary company). A professionally drafted discretionary trust deed typically costs between $800 and $2,500 depending on complexity. Ongoing annual compliance — tax returns, ASIC fees, accounting — adds to that. A corporate trustee structure involves two entities and therefore two sets of ongoing costs, but for business owners with meaningful assets, the protection is generally worth it.

Choosing the right structure before you grow is one of the most important decisions you will make as a business owner. At Pinnacle Accounting & Advisory, we review your situation holistically before recommending anything. For a comprehensive overview of how these structures fit together and which one might be right for your business, see our complete guide to business structures in Australia, or explore our dedicated business structuring services.

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This article contains general advice only and does not take into account your specific circumstances. Please speak with a qualified accountant or tax adviser before making financial decisions.

Frequently Asked Questions

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