What Is a Private Company in Australia?

If you’re growing beyond a sole trader or partnership, you’ll quickly come across the “Pty Ltd” company structure. It’s the most common way Australian founders scale, raise private capital and protect their personal assets.

But what exactly is a private company in Australia, how is it different from a public company, and what legal obligations come with it?

In this guide, we’ll unpack what a proprietary limited company is under Australian law, the key pros and cons, how to set one up step-by-step, and the ongoing duties you’ll need to manage. By the end, you’ll have a clear picture of whether a Pty Ltd suits your plans-and the practical next steps to get started with confidence.

What Is a Private (Proprietary) Company Under Australian Law?

In Australia, a private company is formally called a “proprietary company” and usually ends with “Pty Ltd” (proprietary limited). These companies are registered under the Corporations Act 2001 (Cth) and regulated by the Australian Securities and Investments Commission (ASIC).

Here are the key features in plain English:

• Separate legal entity: A company is its own legal “person”, separate from its owners. That separation limits your personal liability for business debts and claims.
• Limited liability: Shareholders are generally liable only up to the amount unpaid on their shares (if any).
• Shareholder cap: A proprietary company must have at least one shareholder and cannot have more than 50 non‑employee shareholders.
• No public fundraising: Proprietary companies can’t make public offers of shares. They raise funds privately (for example, from founders, employees or sophisticated investors).
• Minimum directors and residency: You need at least one director who ordinarily resides in Australia.
• Director ID: Every director must obtain a Director ID before they are appointed.
• “Small” vs “large” proprietary: Reporting and audit obligations vary depending on size thresholds across revenue, assets and employees.

When customers, suppliers and investors see “Pty Ltd”, it signals you operate through a formal corporate vehicle with defined governance and accountability.

Private Company vs Public Company: What’s the Difference?

Both give you a separate legal entity and limited liability, but they differ in how they raise capital, their governance and their compliance burden.

• Fundraising and listing: Public companies can offer shares to the public and list on a stock exchange. Proprietary companies can’t publicly raise capital and generally rely on private rounds (for example, from founders, staff equity plans or sophisticated investors).
• Disclosure and reporting: Public companies are subject to strict continuous disclosure rules and audits. Proprietary companies have lighter reporting obligations, especially if they qualify as “small”.
• Governance: Public companies typically have larger boards, board committees and more formal corporate governance. Proprietary companies have simpler governance, but still require compliant decision‑making and record‑keeping.
• Cost and complexity: It’s faster and less expensive to set up and operate a proprietary company than a public company.

For most startups and small to medium businesses, a proprietary company strikes the right balance between credibility, liability protection and manageable compliance.

How Do You Set Up a Private Company (Pty Ltd)?

Registering a company is simpler than it looks when you break it into steps. Here’s a practical roadmap.

1) Map Out Ownership and Governance

Decide how many shares the company will issue, who will own them, and what rights attach to each class (for example, voting, dividend or vesting terms). Consider adopting a tailored Company Constitution rather than relying on the Corporations Act “replaceable rules”-most growth‑focused businesses prefer clear, custom rules from day one.

2) Confirm Directors and Obtain Director IDs

You need at least one director who ordinarily resides in Australia. If you’re unsure, check the residency rules in our Australian Resident Director Requirements guide.

Each director must have a Director ID before appointment. It’s a one‑off identification number that helps prevent identity fraud and keeps director records accurate.

3) Choose a Company Name (Or Use Your ACN)

You can register a unique company name or use your Australian Company Number (ACN) as the legal name and adopt a trading name later. If you plan to trade under a name different from the company’s legal name, you’ll also need to register a Business Name.

4) Submit Your ASIC Application

Prepare the details (directors, shareholders, registered office, principal place of business, share structure) and lodge your application. Once approved, ASIC will issue your ACN and your official ASIC Certificate of Registration. Keep it with your company records.

5) Apply for Tax Registrations

Apply for an ABN and TFN for the company. Register for GST if your turnover is (or will likely be) $75,000 or more. Set up PAYG withholding if you’ll have employees or pay directors’ fees. A qualified accountant can help you choose the right registrations and systems for your situation.

6) Open a Company Bank Account and Set Up Statutory Registers

Open a dedicated bank account in the company’s name. Maintain statutory registers (members, option holders, directors and secretaries) and keep minutes and resolutions current. Security interests over assets are recorded on the national PPSR (not in a company “charges” register), so ensure you understand your obligations if you grant or take security.

7) Document Shareholder Arrangements

Where there’s more than one owner-or you plan to bring in employees or investors-put the rules in writing. A robust Shareholders Agreement typically sits alongside your constitution and covers decision‑making, exits, transfers, investor rights and dispute resolution.

If you’d like end‑to‑end help with registration, governance documents and compliance setup, our fixed‑fee Company Set Up package can save time and reduce errors.

What Are the Ongoing Legal Obligations for a Pty Ltd?

Once you’re incorporated, there are ongoing duties for directors and processes your company needs to follow. Getting these right early builds trust and avoids penalties.

Directors’ Duties and Good Governance

• Care and diligence: Make informed decisions and monitor the company’s financial position.
• Good faith: Act in the best interests of the company and for a proper purpose.
• Proper use of position and information: Don’t misuse your role or company information for personal gain.
• Prevent insolvent trading: Don’t incur debts if the company is insolvent, or would become insolvent by incurring them.

Documenting board decisions, keeping accurate financial records and seeking professional advice early all help demonstrate diligence.

Decision‑Making and Signing Documents

Have a clear process for board and shareholder approvals and record them via minutes or written resolutions. When your company signs contracts, Corporations Act section 127 execution can streamline enforceability and reduce disputes-make sure you follow your constitution (or replaceable rules).

ASIC Filings, Annual Reviews and Company Records

• Annual review: Pay ASIC’s annual review fee and confirm your details are correct.
• Notify changes: Lodge updates when directors, officeholders, shareholdings, addresses or the company name change.
• Maintain registers and records: Keep member and director registers, minutes, resolutions and financial records for the required periods.

Financial Reporting and Audit (Small vs Large)

Proprietary companies are “small” or “large”, which affects reporting and audit requirements. Status is assessed each year against thresholds for consolidated revenue, gross assets and employee numbers.

• Small proprietary: Lighter reporting obligations unless directed by ASIC or shareholders.
• Large proprietary: Must lodge audited financial statements with ASIC annually.

As you grow, review your status each year-moving into “large” changes your compliance obligations.

Tax, Payroll and Super

• Company tax: Lodge company tax returns and pay the applicable corporate rate.
• GST: If registered, collect and remit GST and lodge BAS on time.
• PAYG and super: Withhold PAYG for employees and pay superannuation by due dates.

Tax settings can be nuanced, so it’s wise to work with an accountant to get your registrations, reporting cycles and payroll systems right from the outset.

Employment, Safety and Policies

If you hire staff, you’ll need compliant employment contracts and to follow Fair Work obligations around minimum pay, hours, leave, breaks and termination. An Employment Contract sets clear expectations and helps prevent disputes, and you should implement appropriate workplace policies (for example, WHS, discrimination and harassment, IT and device use).

Privacy and Consumer Law

If you collect personal information (for example, via your website or CRM), your business may need a compliant Privacy Policy and processes aligned with the Privacy Act 1988 (Cth). If you sell goods or services, ensure your marketing, pricing, warranties and refunds comply with the Australian Consumer Law to avoid penalties and reputational harm.

Security Interests and the PPSR

Many companies grant or take security over assets (for example, equipment or receivables). Security interests are registered on the Personal Property Securities Register (PPSR). Understanding when and how to register or check interests is critical for asset protection and priority.

Should You Choose a Pty Ltd? Key Benefits and Trade‑Offs

Before you register, weigh up the main advantages and considerations for your situation.

Benefits

• Limited liability: Your personal assets are generally protected from company debts and claims.
• Credibility and growth: A company structure can make it easier to attract investors, partners and enterprise customers.
• Flexible ownership: You can issue different classes of shares, allocate equity to co‑founders or employees, and plan for future investment rounds.
• Continuity: The company continues even if ownership or management changes, which supports succession planning and exits.

Trade‑Offs

• Setup and ongoing costs: Expect registration fees, accounting costs, tax filings and ASIC annual review fees.
• Compliance obligations: Directors must meet legal duties, maintain proper records, and lodge forms and reports on time.
• Less privacy than a sole trader: Certain details (for example, directors and registered office) are recorded with ASIC.

If asset protection, credibility and growth are priorities, a proprietary company is often the right move. If you’re testing a low‑risk, low‑revenue side hustle, starting as a sole trader could be fine-but you can always incorporate later.

What Legal Documents Does a Private Company Typically Need?

Every company is different, but these core documents are common for most proprietary companies:

• Company Constitution: Sets the rules for governance, share issues, meetings and decision‑making (many founders adopt a tailored Company Constitution for flexibility and investor readiness).
• Shareholders Agreement: Works alongside your constitution to cover founder and investor rights, decision thresholds, vesting, exits and dispute resolution-our Shareholders Agreement is a common cornerstone.
• Director and shareholder resolutions: Written resolutions and minutes to record key decisions (for example, issuing shares, appointing directors, approving major contracts).
• Customer terms or a Master Services Agreement: Clear terms for scope, service levels, payment, IP, confidentiality, warranties and limitations of liability.
• Supplier or contractor agreements: Define deliverables, timelines, IP ownership, confidentiality and liability to manage supply chain risk.
• Employment contracts and workplace policies: Set expectations and support Fair Work compliance for your team.
• Privacy Policy: Explains what personal information you collect, why and how you handle it, and user rights-put a compliant Privacy Policy in place if you collect personal data.

Good contracts do more than “tick a box”-they allocate risk, protect your IP and reduce disputes. Templates can miss key details, so it’s worth tailoring your documents to your business model and risk profile.

FAQs We’re Often Asked

Do I need a company constitution? You’re not obliged to have one-you can rely on replaceable rules. However, many founders opt for a custom constitution to better match their share classes, decision‑making processes and investor expectations.

How many directors do I need? Proprietary companies need at least one director who ordinarily resides in Australia, and all directors must have a Director ID before appointment.

How do we sign contracts correctly? Companies commonly execute documents under Corporations Act section 127. Follow your constitution (or replaceable rules) and keep proper records of approvals for major contracts.

Do I need to register a business name? If you trade under a name that’s different from your company’s legal name, you must register a Business Name.

What proof do I get when I register? ASIC issues an ACN and an official Certificate of Registration, which you’ll typically provide to your bank and other stakeholders.

Key Takeaways

• A private company (Pty Ltd) is a separate legal entity that limits shareholder liability, capped at 50 non‑employee shareholders, and is ideal for credibility and growth.
• Proprietary companies can’t raise funds from the public, but they can run private rounds (for example, with founders, employees and sophisticated investors) and often have simpler reporting than public companies.
• To set up, confirm your directors and Director IDs, choose your name, register with ASIC, obtain the right tax registrations and set up your statutory registers and bank account.
• Get your governance and contracts in order early-consider a Company Constitution, a Shareholders Agreement, customer/supplier terms, employment contracts and a compliant Privacy Policy.
• Directors must meet ongoing duties, keep accurate records, handle ASIC filings on time, and stay on top of tax, employment, privacy and consumer law obligations.
• Work with an accountant for tax, GST and payroll settings, and with a legal team to tailor your structure and documents to your growth plans.

If you’d like a consultation on setting up a private company in Australia, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no‑obligations chat.