Difference Between Private Law And Public Law In Australia

Understanding the difference between private law and public law is fundamental if you run a business, are thinking about a dispute, or simply want clarity on your rights and obligations in Australia.

These two branches of law shape how you deal with customers, suppliers and staff, and how you interact with government bodies and regulators. They also influence how disputes are resolved and which processes you’ll use.

If you’re keen to grow your business and stay compliant, knowing whether your issue sits in private or public law is a smart starting point. Below, we break down what each branch covers, how they overlap in practice, and what matters most for Australian business owners.

Private Law Vs Public Law: What’s The Difference?

At a high level, the difference comes down to who’s involved and whose interests are at stake.

• Private law governs relationships between private parties - individuals, companies, and other non-government entities. It’s about rights, duties and remedies between “you and another person or business.”
• Public law governs the relationship between people or businesses and the state (government, government agencies or regulators), and covers issues affecting the public at large. It looks at how government power is used and controlled.

A helpful way to remember it: private law is “me vs you,” while public law is “me vs the government (or the public interest).” In reality, many matters touch both areas, but this framework helps you choose the right pathway and process.

What Does Private Law Cover?

Private law is the backbone of everyday business dealings in Australia. When you make a sale, sign an agreement, hire staff, protect your brand, or handle a complaint - you’re usually operating within private law.

Main Areas Of Private Law

• Contract law: Rules for legally binding agreements between private parties (for example, a client Services Agreement, supplier agreement or online Website Terms and Conditions).
• Tort law: Civil wrongs such as negligence, defamation or nuisance - where one party’s conduct causes loss or harm to another (e.g. a customer injury claim on your premises).
• Property law: Rights to own, use and transfer property, including land, leases and personal property.
• Commercial law: A broad umbrella that touches sales, supply, company arrangements and day-to-day trading relationships. It intersects with the Australian Consumer Law (ACL), sale of goods, and securities interests.
• Intellectual property: Ownership and protection of intangible assets like brand names, logos and software; many businesses register their brand as a trade mark via Register Your Trade Mark.

Why Private Law Matters For Businesses

For founders and SMEs, private law is central to how you operate and manage risk. It helps you:

• Put enforceable contracts in place with customers and suppliers, including fit-for-purpose Terms of Trade or client agreements
• Resolve disputes through negotiation, mediation or civil courts (rather than criminal processes)
• Protect your brand and confidential information (NDAs, IP ownership and licensing)
• Define ownership and decision-making among co-founders with a tailored Shareholders Agreement

In short, private law is where most day-to-day business risk is identified, allocated and managed.

What Does Public Law Cover?

Public law regulates how individuals and companies interact with the government and the legal rules that affect the community as a whole. If a regulator investigates your marketing, a council issues a notice, or a government department refuses a permit, you’ve entered public law territory.

Main Areas Of Public Law In Australia

• Constitutional law: The rules in the Australian Constitution that set up and limit government powers.
• Administrative law: How government decisions are made, and how you can challenge them (e.g. merits review in a tribunal, or judicial review in a court).
• Criminal law: Prosecution and defence of offences considered harmful to society - brought by the state.
• Tax law: Obligations enforced by the Australian Taxation Office (ATO), such as income tax and GST registration thresholds.
• Environmental and planning law: Development approvals, zoning, and compliance with state/territory environmental regulators.
• Work health and safety (WHS): Public law obligations around safe workplaces, enforced by state/territory safety regulators.

Public law is designed to ensure government power is exercised fairly, lawfully and transparently. For businesses, it often shows up as licensing, compliance, and regulator interactions - from advertising rules to WHS obligations.

Correcting A Common Misconception

If your café is inspected for food safety, enforcement is handled by state and territory food authorities and local councils - not Food Standards Australia New Zealand (FSANZ). FSANZ develops the Food Standards Code, but compliance and fines are issued by the relevant state/territory bodies and councils.

Examples: Private Vs Public Law In Practice

It’s easier to see the distinction with some simple, real-world scenarios.

Example 1: Contract Dispute With A Supplier

You sign a coffee supply contract and your supplier misses deliveries for a month. This is a private law dispute. You’ll look to the contract’s remedies, and if needed, pursue a civil claim for breach.

Example 2: A Council Notice Or Regulatory Fine

Your venue receives an improvement notice from your local council for a food handling issue. Because the decision is made by a government authority using statutory powers, you’re in public law. You may have internal review rights or tribunal review options under administrative law processes.

Example 3: Employment Issues

An employee says you breached their contract by underpaying a bonus. That’s a private law issue (contract). But if minimum entitlements under the Fair Work framework are in question, public law elements apply too, because those statutory minimums override terms in an Employment Contract.

Example 4: Marketing And Consumer Issues

Your online store’s advertising is alleged to be misleading. Contractually, your website terms sit in private law. But obligations under the Australian Consumer Law (ACL) are public law and cannot be excluded by contract. Note that general “misleading or deceptive conduct” under ACL section 18 is a civil prohibition; however, certain specific conduct under other ACL provisions can also attract criminal liability. It’s wise to review your advertising against section 18 of the ACL and related standards.

Example 5: Trade Marks

Applying to register your logo via IP Australia involves public systems, but if a competitor uses a confusingly similar brand, enforcing your rights is typically a private law action (e.g. infringement proceedings). Many businesses protect their brands early through trade mark registration.

Where Private And Public Law Overlap

Plenty of business issues blend private and public law. Three common areas are:

• Employment: Contracts and policies (private) must comply with the Fair Work Act and modern awards (public). Many employers review modern awards alongside contracts to ensure compliance.
• Consumer protection: Your customer terms are private law, but the ACL (public law) sets non-negotiable standards - especially around refunds, guarantees and advertising.
• Corporate structure: Founders agree privately on ownership and decision-making, often with a Shareholders Agreement. At the same time, your company must meet public law obligations under the Corporations Act and engage with ASIC.

Understanding the overlap helps you pick the right process: Do you negotiate and settle privately? Or do you exercise review rights, respond to a regulator, or update your statutory compliance?

Which Laws Apply To My Business?

Most Australian businesses will encounter both branches. A quick way to orient yourself:

• If you’re dealing with another business, a customer, a landlord or a contractor - think private law first (contracts, torts, IP).
• If you’re dealing with a council, regulator or a statutory requirement - you’re likely in public law (licensing, regulatory notices, workplace safety, taxation).
• Check the source of the rule: contracts and policies usually sit in private law; legislation and regulatory instruments are public law.

Public Law Compliance Touchpoints For SMEs

• Licences and permits: Industry-specific authorisations, development approvals and council permits.
• Employment and WHS: Minimum entitlements and safety duties apply regardless of your contract wording.
• Consumer law: The ACL governs refunds, guarantees and advertising standards.
• Tax: Income tax, PAYG and GST compliance (seek advice from a registered tax or BAS agent to confirm your obligations).

Private Law Foundations You’ll Use Often

• Customer and supplier contracts: Clear terms reduce disputes and set expectations.
• Founder and investor arrangements: Your company’s ownership and governance are best captured in a tailored Shareholders Agreement and, where relevant, a Company Constitution.
• Intellectual property: Protect your brand and ensure you own what’s created for your business.

What Legal Documents Should I Have In Place?

Strong, well-drafted documents sit at the heart of good private law hygiene - and they help you meet public law obligations too. Most businesses will consider some or all of the following:

• Customer Agreement or Terms and Conditions: Sets out scope, pricing, warranties and liability. Online businesses often publish Website Terms and Conditions to cover sales and site use.
• Service or Supply Agreement: Defines deliverables, timelines, quality standards and payment with clients or suppliers.
• Employment Contract: Records role, pay, entitlements, confidentiality and IP ownership, in line with the Fair Work framework. For employees, use an Employment Contract tailored to the role.
• Privacy Policy: Explains how you collect, use and store personal information. Many small businesses choose to implement a Privacy Policy as best practice, and you are legally required to have one if you’re an APP entity (for example, if your turnover exceeds the relevant threshold or you meet specific criteria under the Privacy Act).
• Shareholders Agreement: If you have co-founders or investors, this document covers ownership, decision-making, vesting and exit events.
• Non-Disclosure Agreement (NDA): Protects confidential information when collaborating or negotiating.
• IP and brand protection: Consider trade mark registration and clear IP assignment clauses in your contracts.

Not every business needs every document on day one, but getting the essentials in place (and tailored to how you operate) prevents costly disputes and avoids accidental non-compliance with the ACL or privacy rules.

Are There Key Public Laws I Should Know About?

Yes - several frameworks appear again and again for SMEs across Australia:

• Australian Consumer Law (ACL): Sets mandatory standards on advertising, unfair terms and consumer guarantees. Your contracts can’t opt out of the ACL; review your content and marketing against section 18 (misleading or deceptive conduct) and related rules.
• Fair Work legislation: Establishes minimum workplace standards (e.g. minimum pay, leave, NES). Check relevant modern awards alongside your contracts and policies.
• Privacy Act 1988: If you’re an APP entity or otherwise caught by the Act, you must comply with the Australian Privacy Principles. Many businesses also adopt privacy practices proactively to build trust.
• Corporations Act 2001: Governs company registration, director duties and reporting. If you’re incorporating, consider our Company Set Up support and ensure your internal documents are aligned.
• WHS and industry-specific regulation: Safety duties, food licensing, liquor, and other permits are managed by state and territory bodies and local councils.
• Tax and superannuation: Registering for an ABN, GST (if required) and meeting PAYG and super obligations is essential. Seek advice from a registered tax or BAS agent for your specific situation.

Laws and regulator guidance evolve. If you’re planning a new product, opening a site, or franchising, getting timely legal guidance can save you time and cost down the track.

Key Takeaways

• Private law governs relationships between private parties; public law governs how individuals and businesses interact with government and the public interest.
• Most day-to-day business issues (contracts, IP, supplier and customer relationships) sit in private law - but public law obligations (ACL, Fair Work, Privacy, WHS) still apply and can override contract terms.
• Many matters involve both branches: for example, employment issues engage private contracts and public minimum standards at the same time.
• Protect yourself with clear contracts and policies - such as Website Terms and Conditions, Employment Contracts, a Privacy Policy (if required), and a Shareholders Agreement - and make sure they align with your public law obligations.
• If you receive a regulator notice or council decision, you’re dealing with public law processes; review your rights to internal review or tribunal review promptly.
• For tax, GST and payroll, confirm your obligations with a registered tax or BAS agent - tax settings are separate from your legal structure and contracts.

If you would like a consultation on how the difference between private and public law affects your business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.