Alex is Sprintlaw’s co-founder and principal lawyer. Alex previously worked at a top-tier firm as a lawyer specialising in technology and media contracts, and founded a digital agency which he sold in 2015.
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Whether you’re planning your first venture or formalising a growing side hustle, choosing your legal structure is one of the biggest decisions you’ll make as a business owner in Australia.
Your structure affects day‑to‑day control, risk, tax, and growth options. Get it right, and you’ll give your business a strong foundation. Get it wrong, and you may face avoidable costs and roadblocks later on.
In this guide, we’ll explain what a legal structure is, compare the main options in Australia, outline how to set up each structure step‑by‑step, and highlight the compliance and documents to have in place. We’ll keep things practical, so you can move forward with confidence.
What Is A Legal Structure?
A legal structure is the formal way your business is set up and recognised under Australian law. It determines:
- Who owns and controls the business
- Who is legally responsible for debts and obligations (liability)
- How profits are taxed and distributed
- How easy it is to bring in new owners or investors
- Your setup costs, admin burden, and ongoing compliance
There’s no “best” structure for everyone. The right fit depends on your goals, risk profile, stage of growth, and industry.
Which Business Structures Can You Choose In Australia?
Most Australian small businesses start with one of four structures. Here’s a plain‑English overview of how each works.
Sole Trader
You operate the business as an individual. It’s simple and low‑cost to set up and gives you full control.
However, there is no legal separation between you and the business. You are personally responsible for all business debts and liabilities.
- Tax: Income is taxed at your personal tax rates.
- Setup: Obtain an ABN and register a business name if you trade under a name other than your own.
- Good for: Freelancers, early side hustles, testing an idea with minimal complexity.
Partnership
Two or more people or entities run a business together. Partners share profits and responsibilities as agreed.
A partnership itself needs its own ABN and TFN. Partners don’t each need a separate ABN for the partnership (unless they also run other businesses).
- Tax: The partnership lodges a partnership tax return, but profits flow to partners who pay tax at their own rates.
- Liability: Partners are generally jointly and severally liable for partnership debts, which can expose personal assets.
- Good for: Simple ventures with a small group of owners who want to avoid company setup for now.
Company
An Australian company (usually Pty Ltd) is a separate legal entity registered with ASIC. That separation can protect your personal assets (limited liability), which is a key reason many growing businesses incorporate.
- Tax: Companies pay a flat company tax rate. Owners (shareholders) are taxed separately on dividends or salaries.
- Liability: Shareholders’ liability is generally limited to unpaid amounts on their shares, but directors have important legal duties and can face personal liability in certain scenarios (more on this below).
- Good for: Ventures seeking asset protection, credibility, investor funding, or the ability to issue shares.
Trust
A trust is a structure where a trustee (an individual or company) holds and manages business assets for the benefit of beneficiaries under a trust deed.
- Tax: Profits are usually distributed to beneficiaries, who then pay tax at their personal or entity rates (subject to the trust deed and tax rules).
- Complexity: Trusts can provide asset protection and tax flexibility, but they’re more complex and costlier to set up and maintain.
- Good for: Asset protection or family‑business arrangements where distributions are planned. It’s wise to get tailored legal and accounting advice first.
If you’re considering trusts, it helps to understand the basics of ABNs, ACNs and TFNs in this context, and these trust requirements in Australia are a good starting point.
How Do You Choose The Right Structure?
Use these questions to help narrow your options.
- Liability comfort: Would limited liability help you sleep better at night? Companies often suit higher‑risk or growth ventures for this reason.
- Tax position: How will income be earned and distributed? Structures have different tax treatments. It’s best to get accounting advice specific to your situation.
- Control and decision‑making: Will you own and control the business alone, or with others? If you’ll have co‑founders or investors, a company can provide clear rules around ownership and control.
- Funding and growth: Do you plan to scale or raise capital? Companies make it easier to issue shares and bring in new investors.
- Cost and admin: What level of setup cost and ongoing admin are you comfortable with?
- Exit and succession: How easily do you want to transfer or sell the business in future? Companies allow shares to be transferred relatively easily.
Many owners start simple (for example, as a sole trader) and move to a company once revenue and risk grow. The key is to reassess as your plans evolve.
Step‑By‑Step: Set Up Your Structure The Right Way
Here’s a practical roadmap for setting up your business in Australia. Choose the steps that match your preferred structure.
1) Plan Your Venture
- Clarify your offering, target customers, pricing and risks in a short business plan.
- Decide whether you’ll run solo or with co‑founders now (or later). Ownership and decision‑making arrangements will shape your structure.
If you’ll trade under a name that isn’t your legal name, you’ll likely need a business name. It’s helpful to understand the difference between a business name vs company name before you register anything.
2) Choose Your Structure
- Balance liability protection, tax, control, growth and admin effort against your goals and budget.
- If you foresee taking on investors, employees or larger contracts soon, a company may be worth the extra admin from the start.
3) Complete Your Registrations
- Sole trader: Apply for an ABN and a business name if required. Consider whether you need to register for GST (compulsory when your GST turnover is $75,000 or more in a 12‑month period, with some exceptions).
- Partnership: Apply for a single ABN and TFN for the partnership, and register a business name if needed. Partners don’t each need a separate ABN for the partnership.
- Company: Register your company with ASIC to obtain an ACN and appoint directors. Decide whether to adopt a Company Constitution or rely on replaceable rules. Then apply for the company’s ABN and TFN, and register a business name if the company will trade under a different name.
- Trust: Arrange a trust deed and appoint a trustee (often a company), then obtain an ABN and TFN for the trust. Get legal and accounting input to avoid costly errors.
Most businesses will also open a dedicated business bank account. Keeping business and personal finances separate is essential for clean records and easier compliance.
4) Register For Taxes And Licences
- GST and PAYG withholding registrations (as applicable).
- State‑based payroll tax (if you exceed the threshold).
- Any local council approvals or industry licences specific to your sector.
If you’re unsure whether you even need an ABN for your activities, this overview of the advantages and disadvantages of having an ABN can help you weigh it up.
5) Put Key Documents In Place
- Set the ground rules among owners (for companies, a Shareholders Agreement; for partnerships, a partnership agreement; for trusts, a robust trust deed).
- Prepare your core contracts (customer terms, supplier agreements) and the policies you’ll actually use day‑to‑day (privacy, website, workplace).
A little work here goes a long way in reducing risk and keeping you out of avoidable disputes.
Ongoing Compliance And Director Liability: What To Expect
Every structure has compliance tasks. Here’s what typically applies at a high level.
Sole Trader
- Annual individual tax return including business income.
- Business activity statements if registered for GST.
- Maintain records and update ABN details when they change.
Partnership
- Annual partnership tax return and statements to partners.
- Each partner declares their share of profit or loss in their own return.
- Keep proper partnership records and bank accounts.
Company
- ASIC annual review and fee, notify ASIC of certain changes, and maintain company registers and records.
- Company tax return, and BAS/IAS as applicable.
- Small proprietary companies typically don’t have to prepare or lodge audited financial statements unless directed by ASIC, shareholders, lenders or because they meet certain “large” tests.
Directors have legal duties under the Corporations Act (for example, to act with care and in the company’s best interests). Limited liability doesn’t protect directors from all risks. Personal exposure can arise for things like insolvent trading, certain workplace or environmental breaches, unpaid PAYG withholding and superannuation, and where you’ve signed personal guarantees.
Trust
- Annual trust tax return and distributions in line with the trust deed and tax rules.
- Ensure trustee administration is carried out correctly and records are maintained.
Whatever your structure, strong record‑keeping and clear separation of business funds will save you time, money and stress.
What Laws Do You Need To Follow From Day One?
Beyond choosing and registering a structure, most Australian businesses need to comply with a handful of baseline laws.
Australian Consumer Law (ACL)
If you sell goods or services, you must comply with consumer guarantees, fair advertising, pricing and refund rules under the ACL. Getting your customer terms and marketing practices right is essential for trust and compliance. If you need support in this area, a dedicated consumer law approach helps align your operations with the rules.
Employment And Workplace
Hiring staff? You’ll need lawful employment agreements, to pay the correct wages and entitlements, and to provide a safe workplace. A tailored Employment Contract is a smart starting point, supported by clear workplace policies.
Privacy And Data
Many small businesses collect customer data through websites, bookings or marketing. The Privacy Act contains a small business exemption for businesses under $3 million annual turnover, but there are important exceptions (for example, health service providers, those trading in personal information, government contractors and others). It’s best practice to be transparent and use a clear Privacy Policy, and to handle data securely from day one.
Intellectual Property (IP)
Protect your brand, content and innovation. Consider registering trade marks for your name and logo, and make sure you’re not infringing someone else’s rights when you launch.
Licences, Permits And Local Rules
Depending on your industry and location, you may need council approvals or sector licences (for example, food, childcare, building). Check these requirements early so you don’t face delays opening your doors.
Finally, tax. Your structure influences how you’re taxed, but the details depend on your situation. It’s worth getting personalised accounting advice alongside your legal setup to ensure your registrations and reporting are correct from the outset.
What Legal Documents Will You Need?
The exact mix depends on your business model, but most Australian startups benefit from having these core documents and policies in place.
- Customer Terms & Conditions: Set clear expectations about your service or product, pricing, delivery, warranties and refunds.
- Supplier or Contractor Agreements: Lock in scope, deadlines, quality standards, IP ownership and liability with third parties you rely on.
- Privacy Policy: Explain how you collect, use and store personal information in a way customers can trust. A practical, plain‑English Privacy Policy helps you meet obligations and build credibility.
- Website or App Terms: Set rules for users, limit your liability and deal with IP on your online platforms.
- Employment Contracts & Workplace Policies: Document roles, entitlements, confidentiality and conduct so everyone knows where they stand. Start with a tailored Employment Contract.
- Shareholders Agreement: If you’re forming a company with co‑founders or investors, a Shareholders Agreement sets decision‑making processes, ownership rights, vesting and exit mechanics.
- Company Constitution: If you’re incorporating, decide whether to use replaceable rules or adopt a customised Company Constitution that better reflects how you want to run the company.
You won’t necessarily need everything on day one, but getting the fundamentals in place early reduces risk and helps you grow with confidence.
Key Takeaways
- Your legal structure affects control, liability, tax and growth options - it’s a foundation decision worth getting right.
- Common choices in Australia are sole trader, partnership, company and trust. Each has distinct setup steps, costs and compliance obligations.
- Partnerships use a single ABN/TFN, companies need an ACN plus ABN/TFN, and trusts require a deed and separate registrations.
- Company directors get limited liability but still have important duties and potential personal exposure (for example, insolvent trading and certain tax and employment‑related liabilities).
- Stay on top of core laws from day one: the ACL, employment obligations, privacy/data handling, and any industry licences or council approvals.
- Protect your venture with practical documents like customer terms, privacy and website policies, employment contracts, and owner‑governance documents such as a Shareholders Agreement.
- Revisit your structure as you grow - many businesses start simple and incorporate when risk, revenue or investor interest increases.
If you’d like a consultation on defining the right legal structure for your Australian business, contact us at 1800 730 617 or team@sprintlaw.com.au for a free, no‑obligations chat.
