Most people choose a business structure early, quickly and on the strength of one consideration. A friend says a company protects you. An online calculator shows a lower tax rate. A template from an overseas website talks about limited liability companies. The choice is made, the registrations are done, and the structure is rarely looked at again until something forces the question: a new partner, a large contract, an investor, a dispute, or the owner wanting to step back.
Structure matters because it decides who owns the business, who controls it, who is responsible for its debts, how money moves to the owners, what paperwork must be done every year, and what happens when someone leaves or dies. It is not the same as a business name, and it is not a guarantee of protection. The right choice depends on the owners, the risks, the money flows and the plans for the business, and it can change as the business grows.
This article explains the four common structures in Australia, a method for comparing them, the myths that lead to poor choices, and the moments when the decision should be revisited. It is general information only. Structure has tax, legal and personal consequences, so test your choice with a registered tax agent or accountant and a lawyer. The Australian Securities and Investments Commission (ASIC), the Australian Taxation Office (ATO) and business.gov.au all publish guidance on business structures.
The four common structures
| Structure | Who carries on the business | Control | Exposure and administration |
|---|---|---|---|
| Sole trader | You, personally; the business is not a separate legal entity | You decide | Simplest to set up and run; you are personally responsible for the business’s debts and obligations |
| Partnership | Two or more people carrying on business together | Shared, under the partnership agreement and the law | Partners can generally be personally liable for partnership debts, including those another partner incurs; a written agreement is essential |
| Company | A separate legal entity registered with ASIC, owned by shareholders and run by directors | Directors govern; shareholders own | More registration, record keeping and ongoing obligations; directors have legal duties; limited liability helps but is not absolute |
| Trust | A trustee holds and manages assets for beneficiaries under a trust deed | The trustee acts under the deed and the law | More complex and costly to set up and run; tax, succession and trustee responsibilities need tailored advice |
A few points are commonly misunderstood:
- A business name is not a structure. Registering a business name with ASIC lets you trade under that name. It does not create a company, and it does not give you trade mark rights, which are a separate registration with IP Australia.
- A trust is not a person. The trustee, an individual or a company, enters contracts and is responsible for the trust’s obligations. Many trading trusts use a company as trustee for that reason.
- Structures can be combined. Some businesses use a company to trade and a trust to hold investments or to own the company’s shares. Combinations add cost and complexity, and need a clear reason.
Five questions for comparing structures
1. Ownership and control
List the owners, who makes which decisions, how votes work, what each person contributes and, critically, what happens when someone wants to leave, becomes unable to work or dies. A structure that suits one founder may not suit three, or an incoming investor or family successor. An informal understanding between friends is not governance; write it down in a partnership agreement, a shareholders agreement or a trust deed, as appropriate. The choosing the right co-founder article covers agreeing these matters with business partners.
2. The real risks
List the risks the business will actually carry: contracts and warranties, employees, product or professional liability, leases and borrowing, personal guarantees, data and privacy, regulated activities and valuable intellectual property. Then consider how each structure, and insurance, would deal with them. A company separates the business’s debts from the shareholders, but directors still have duties, and owners often take on personal exposure through guarantees to banks and landlords. The what a company structure does not protect article covers where owners remain exposed even with a company.
3. How money will move
Do not choose on a headline tax rate alone. Map how money will flow: revenue, expenses, owner drawings, wages, dividends or trust distributions, and money left in the business to fund growth. Tax outcomes depend on the structure, the people involved and their other income, and the rules on taking money out of companies and trusts can surprise owners who treat the business account as their own. Ask your adviser to model a normal year, a bad year and a growth year, after tax and after compliance costs, before deciding.
4. Where the business is going
Ask whether you expect to borrow, bring in investors, give staff a share, tender for larger contracts, export, apply for grants or eventually sell. Investors and larger customers usually expect clear ownership, clean records, intellectual property owned by the business and sensible governance. The structure should support the likely path without making everyday operations needlessly complicated.
5. Running costs and continuity
Compare the registrations, record keeping, tax returns, annual reviews, decisions to be documented, banking and insurance each structure requires. Simplicity has real value for a small business. So does continuity: a sole trader business is closely tied to one person, while a company or trust can continue when people change. Weigh both rather than choosing for prestige.
Common myths
- “A company protects everything.” It does not protect against personal guarantees you sign, your own legal duties as a director, or obligations that attach to you personally.
- “The lowest tax rate wins.” After-tax cash in owners’ hands, compliance costs and flexibility matter more than any single rate.
- “We can sort out the agreement later.” Disagreements between partners or shareholders are much harder to resolve without an agreement written while everyone was getting on.
- “Overseas advice applies here.” Material written for other countries often uses structures, terms and tax rules that do not exist in Australia.
- “Structure is a one-off decision.” It should be revisited as the business changes.
Partnerships deserve particular care
Partnerships are easy to start, sometimes without anyone deciding to: two people who simply begin trading together may already be treated as partners. That simplicity hides real exposure. Partners can generally bind each other in the ordinary course of business and can be personally responsible for debts another partner incurs. A written partnership agreement should cover contributions, how profits are shared, who can sign what, how decisions are made, and what happens if a partner leaves, dies or wants out. If the agreement would be awkward to write, that is usually a sign the arrangement needs more thought, not less.
Selling your own skills
Many small businesses mainly sell the personal effort of one person, such as a consultant, contractor or tradesperson. Special tax rules on personal services income can affect how that income is taxed, whichever structure is used, so a company or trust may not change the outcome as much as expected. Check how these rules apply to you with the ATO’s guidance or your tax agent before restructuring for tax reasons.
When to revisit the structure
Review your structure, with your adviser, when:
- ownership changes: a partner joins or leaves, an investor arrives, or family members become involved;
- risk rises: larger contracts, staff, regulated work, significant borrowing or valuable intellectual property;
- profits grow to the point where how money is taken out matters more;
- you plan to sell or step back, because some structures make a sale or succession simpler.
Changing structure later is possible but not free. Moving a business into a new structure can involve transferring assets and contracts, new registrations, and tax or duty consequences, so it is worth getting advice before the change rather than after. The from freelancer to business article covers the wider shift from working alone to running a business.
Practical habits whatever you choose
- Keep business and personal money separate, with a dedicated bank account and clear records.
- Document decisions, especially in companies and trusts, where records of directors’ or trustees’ decisions matter.
- Own your intellectual property in the business, including designs, software and brand, with written assignments from contractors.
- Insure properly: public liability, professional indemnity and other cover often protect against risks that structure cannot.
- Keep registrations current, including ABN details, business names, company records and licences.
A worked example
This is an illustration. An industrial designer starts out alone, working from home for a handful of manufacturing clients. As a sole trader, setup is simple, records are straightforward and the risks are modest. The designer registers a business name, takes out professional indemnity insurance and opens a separate bank account.
Three years later, things have changed. Clients are larger and their contracts include indemnities and liability clauses. The designer plans to employ two staff, has been asked to lease a small studio, and a former colleague wants to join as a part-owner. A sole trader structure now carries all of that risk personally, and has no way to bring in a co-owner other than a partnership.
With an accountant and a lawyer, the designer works through the five questions:
- Ownership and control: two owners with unequal contributions, needing clear rules for decisions and for one of them leaving.
- Risks: larger contracts, employees and a lease. The landlord will want a personal guarantee whatever the structure, so the designer negotiates a cap on it.
- Money flows: the adviser models a normal year, a slow year and a growth year under the realistic options, including the cost of running each.
- Direction: no outside investors planned, but a possible sale in ten years.
- Running it: the extra administration of a company is acceptable at the new scale.
The decision is to move the business into a company with both people as directors and shareholders, under a shareholders agreement that covers decisions, contributions, exit and valuation. The designs and client contracts are transferred on professional advice, insurance is reviewed for the larger business, and the structure is scheduled for review again if an investor appears or the business is sold.
How this applies to a small Australian business
- Compare all four structures against control, risk, money flows, direction and running costs.
- Do not confuse a business name with a structure or a trade mark.
- Write down ownership arrangements in a partnership agreement, shareholders agreement or trust deed.
- List the personal guarantees you sign, whatever the structure.
- Model after-tax cash and compliance costs, not just tax rates.
- Keep business money and records separate from personal ones.
- Review the structure when ownership, risk, profits or plans change.
- Get advice from a registered tax agent or accountant and a lawyer before deciding or changing.
Signals worth watching
- A structure chosen years ago and never reviewed.
- Business partners with no written agreement.
- Personal guarantees nobody has listed.
- Business and personal spending mixed in one account.
- Intellectual property held by an individual or a contractor.
- Plans for investors or a sale with no thought about structure.
Common mistakes
- Choosing on a single tax rate.
- Assuming a company removes all personal risk.
- Using overseas structures and terms that do not apply here.
- Leaving partnership or shareholder arrangements undocumented.
- Mixing personal and business transactions.
- Waiting for a dispute, investor or large tender before fixing ownership and records.
Frequently asked questions
Which structure is best for a new small business? There is no single answer. Many start simply and change as risk, profits and ownership grow. The right choice depends on your circumstances, so get advice.
Does a company stop me being personally liable? Not entirely. Personal guarantees, director duties and some other obligations can still reach you.
Do I need a separate ABN for each structure? Each entity that carries on a business generally needs its own registrations. Check the requirements with the ATO and business.gov.au.
Is a trust only for tax? Trusts are also used for asset protection, succession and holding investments. They are more complex, and the trustee carries real responsibilities.
Should family members be owners? Sometimes, but ownership brings rights and responsibilities. Think about control, what happens if relationships change, and how a family member would leave, and get advice before adding them.
Can I change structure later? Yes, but it can involve transferring assets and contracts, with tax and duty consequences. Plan it with your advisers.
Questions to ask
- Who will own and control the business, now and in five years?
- What risks will the business carry, and which does structure address?
- How will money move from the business to the owners?
- Do we expect investors, staff ownership, a sale or succession?
- What will each structure cost to run each year?
- What would make us revisit this decision?
Bringing it together
A business structure decides ownership, control, personal exposure, money flows, paperwork and continuity. Compare the four common structures, sole trader, partnership, company and trust, against those factors rather than a single tax rate or a belief that a company protects everything. Write down how owners make decisions and leave, keep business money and records separate, insure properly, and revisit the structure as ownership, risk and plans change, with qualified advice before each decision.
Source: KEVOS notes, drawing on earlier KEVOS handbooks on Australian business structures and asset protection, and guidance published by ASIC, the ATO and business.gov.au. Examples in this article are illustrations. This article is general information, not legal, tax or financial advice.
