Must Businesses Disclose Substantially Prejudicial Terms in Contracts? What You Need to Know

Signing a contract is a big step for any business. Whether you’re onboarding a new client, locking in a supplier, or rolling out standard terms across your website, the clauses you include can shape risk, cash flow and relationships.

So what happens when a clause is tough, one‑sided, or likely to catch the other party off guard? Do you have to tell them? And what are the legal consequences in Australia if you don’t?

In this guide, we’ll unpack what “substantially prejudicial” terms look like in practice, when the law expects transparency, how Australia’s unfair contract terms regime applies, and practical ways to make your contracts clear and enforceable without giving up necessary protections.

What Does “Substantially Prejudicial” Mean in Australian Contracts?

“Substantially prejudicial” isn’t a defined legal term in one statute, but in plain English it covers clauses that significantly disadvantage one party or limit their rights in a way that’s outside normal expectations for the deal.

Examples include clauses that:

• Significantly limit or exclude liability (for example, strict caps, broad exclusions, or no‑refund rules)
• Impose extensive indemnities on one party for risks they don’t control
• Allow unilateral changes (price rises, scope changes, or policy updates without consent)
• Enable termination for convenience by one side only, sometimes with minimal notice or compensation
• Auto‑renew a contract unless the other party complies with strict notice hoops
• Set heavy default, cancellation or exit fees that don’t match a reasonable pre‑estimate of loss
• Restrict dispute options or require waivers of important rights

A clause becomes “substantially” prejudicial when its real‑world impact is material and often unexpected. That’s why transparency and plain language matter so much for both compliance and trust.

Do You Have to Disclose Prejudicial Terms? The Legal Position

There is no general, universal duty in Australian contract law to “disclose everything.” Parties can negotiate hard. However, several legal frameworks mean that hiding or burying substantially prejudicial terms can create serious problems. The key is to understand where transparency is legally relevant-and where it’s simply smart risk management.

Unfair Contract Terms (ACL): Transparency Matters-and Penalties Now Apply

The Australian Consumer Law (ACL) protects consumers and small businesses from unfair terms in standard form contracts. A term may be “unfair” if it:

• Creates a significant imbalance in the parties’ rights and obligations
• Is not reasonably necessary to protect the advantaged party’s legitimate interests
• Would cause detriment (financial or otherwise) if relied on

Courts assess unfairness against the whole contract, including the extent to which terms are transparent (plain language, legible, clearly presented). Importantly, transparency is a factor-not a silver bullet. A clearly written but one‑sided clause can still be unfair.

What’s changed? Proposing, using, or relying on an unfair term is now prohibited, and significant civil penalties can apply. If a term is declared unfair, it’s void and unenforceable; the rest of the contract usually continues to operate where possible.

If you offer standard form agreements to consumers or small businesses, build your templates with transparency in mind and sense‑check whether the protections you’re seeking are reasonably necessary for your business model. When in doubt, it’s wise to get a contract review or a specific UCT review and redraft.

Misleading or Deceptive Conduct and Misrepresentation

Even if the unfair contract terms regime doesn’t apply, presenting a contract in a way that obscures key risks can trigger other laws. If your conduct (or silence, in some contexts) gives an overall impression that is misleading, this can breach Section 18 of the ACL. Likewise, false statements about what a clause does (or omitting crucial facts in a way that makes a statement misleading) can amount to misrepresentation.

In practice, the risk is highest when a clause is unusual, harsh, or contradicts what was said in sales material, proposals or emails. Comprehensive disclosure-especially for out‑of‑the‑ordinary provisions-reduces the chance of a claim that the other party didn’t truly understand what they were signing.

Good Faith in Commercial Dealings

Australian courts have recognised that some contracts include an obligation to act in good faith (either implied by law depending on the context, or expressly agreed). While this doesn’t force you to act as the other party’s advisor, deliberately “ambushing” them with a harsh, unexpected clause may be inconsistent with good faith depending on the negotiation and the broader circumstances.

Industry and Sector‑Specific Disclosure Rules

Certain industries have detailed disclosure regimes (for example, franchising and some financial services). These are not generic duties to disclose everything in every contract-they’re specific legal frameworks with their own documents, timelines and penalties. If you operate in a regulated space, build your process around those obligations.

Bottom line: Australian law doesn’t impose a blanket duty to disclose, but hiding substantially prejudicial terms raises real legal risks through the ACL (including penalties), misrepresentation, and expectations of fair dealing. Transparency is both safer and better business.

Which Terms Commonly Raise Red Flags?

Here are the types of terms that often attract scrutiny, especially in standard form or “take‑it‑or‑leave‑it” contracts.

• Limitation of Liability: Caps, exclusions of indirect loss, and carve‑outs should be clearly explained and proportionate to risk. For context, see limitation of liability clauses.
• Indemnities: Broad indemnities that make the other party liable for your losses (including third‑party claims) can be substantially prejudicial-particularly if they extend to matters outside their control.
• Unilateral Variation: Rights to change pricing, features, or policies without consent (or without a genuine termination right for the other side) are high‑risk for unfairness.
• Termination for Convenience (One‑Sided): Allowing one party to walk away at will, especially without fair compensation, can be problematic.
• Auto‑Renewals: Renewal by default with strict notice requirements can surprise counterparties; clear reminders and fair notice windows help.
• Heavy Default/Cancellation Fees: Fees should reflect a genuine pre‑estimate of loss; punitive amounts can be challenged (and raise unfairness concerns).
• Set‑Off and Withholding Rights: Clauses allowing you to withhold payment or set off amounts across invoices or contracts deserve careful explanation-see set‑off clauses for common pitfalls.
• Waivers and Releases: If you rely on customer waivers, ensure they’re specific, conspicuous and reasonable. Not all waivers will be enforceable-here’s more on waivers in Australia.
• Liquidated Damages: If you pre‑set compensation for breach, align it to a reasonable estimate of loss; see liquidated vs unliquidated damages for how courts assess these clauses.

Individually, these terms can be legitimate. The risk arises when they combine to create a significant imbalance or when they’re delivered without clear, accessible explanations.

Practical Ways to Be Transparent Without Undermining Your Position

You can preserve essential protections and still be clear and fair. Consider building these steps into your contracting process.

Call Out Key Risks Early

Flag unusual or one‑sided terms before signature-ideally at the proposal or term sheet stage. A short summary of “Key Terms You Should Know” helps counterparties focus on what matters and shows you’re not hiding the ball.

Use Plain English and Smart Layout

Make important terms easy to find and understand. Use headings, short paragraphs and simple language. If the meaning of a clause would not be obvious to a non‑lawyer, add an explanatory sentence or example.

Ask for Targeted Acknowledgements

For particularly impactful clauses (liability caps, indemnities, auto‑renewals), ask the other party to acknowledge them specifically or initial next to them. If you’re unsure how to do this cleanly, here’s a quick guide to how to initial a document.

Offer a Real Opportunity to Ask Questions

Encourage counterparties to raise concerns and propose reasonable amendments. A collaborative tone often produces better, more durable deals-and reduces disputes later.

Keep an Audit Trail

Save emails, redlines and call notes that show what was explained and agreed. If a dispute arises about what the other party understood, this record can be valuable.

Document Changes Properly

If you adjust a clause to address concerns, make sure the final contract reflects the agreed wording. When needed, use a variation document rather than informal emails-see an overview of making amendments to contracts. And always ensure documents are executed correctly-these legal requirements for signing documents will help you avoid unenforceability due to a technicality.

What Happens If You Don’t Call Out Prejudicial Terms?

Non‑disclosure by itself doesn’t automatically make a clause unlawful. However, several consequences can flow if a substantially prejudicial term is hidden or poorly presented.

• Unfair contract terms: In a standard form contract with a consumer or small business, an unfair term can be declared void. Today, proposing, using, or relying on unfair terms can also attract civil penalties.
• Misleading conduct or misrepresentation: If your sales process or documents created a misleading impression (including by omission), the other party may seek remedies such as damages or setting aside the impacted clause.
• Enforceability issues: Courts interpret ambiguous or unexpected clauses narrowly, particularly when they produce harsh results. Clear disclosure helps ensure your intended meaning is honoured.
• Regulatory scrutiny: The ACCC has prioritised unfair contract terms enforcement. Poorly disclosed, one‑sided templates can draw attention, particularly in sectors with widespread small business customers.
• Reputational and commercial fallout: Even if you “win,” disputes are costly and drain trust. Transparent contracts reduce churn and build long‑term relationships.

Note that courts rarely invalidate an entire contract solely for lack of disclosure. More commonly, they treat a specific term as void, read it down, or apply remedies tied to misleading conduct. The safest path is to make key risk areas conspicuous and justified.

Documents and Processes That Help Manage the Risk

Strong templates and a consistent process make it easier to balance protection and fairness. Consider the following toolkit.

• Customer Terms or Terms of Trade: Clear, plain‑English terms set expectations on pricing, scope, timeframes, warranties and liability. If you sell goods or services, well‑drafted Terms of Trade help you control risk while staying customer‑friendly.
• Website Terms and Policies: If you contract online, your website should include accessible Website Terms and a Privacy Policy written for humans, not just lawyers. This matters for both enforceability and trust. Where relevant, align your check‑out or sign‑up flow with your Website Terms and Conditions.
• Supplier and Contractor Agreements: Make sure indemnities, delivery obligations, service levels and termination rights reflect the actual risk allocation you need. Balance protection with clarity to avoid disputes that disrupt your operations.
• UCT‑Aware Templates: If you use standard form contracts with consumers or small businesses, have your suite assessed against the unfair contract terms regime. A tailored UCT review and redraft can reduce enforcement risk without sacrificing commercial certainty.
• Internal Playbook: Give your team a short playbook for contracting: what to flag during sales, who can negotiate which clauses, when to escalate to legal, and how to keep records.
• Periodic Audits: Laws and enforcement priorities evolve. Schedule a regular contract review to ensure your templates remain compliant and commercially aligned with how you actually deliver your products or services.

Key Takeaways

• There’s no blanket legal duty in Australia to disclose every tough clause, but hiding substantially prejudicial terms can lead to issues under the unfair contract terms regime, misleading conduct rules and expectations of good faith.
• Transparency is a factor in assessing unfairness under the ACL-clear, accessible language and fair presentation help, but a one‑sided clause can still be unfair even if it’s readable.
• Unfair terms in standard form contracts with consumers or small businesses can be void, and proposing or relying on them can now attract penalties.
• Red‑flag clauses include strict limits on liability, broad indemnities, unilateral variation, one‑sided termination, auto‑renewals and heavy exit fees-call these out and justify them.
• Proactive steps-plain English summaries, targeted acknowledgements, genuine opportunities to ask questions and accurate execution-strengthen enforceability and trust.
• Use robust templates and processes (Customer Terms, Website Terms, Privacy Policy, supplier agreements, UCT‑aware drafting) and schedule periodic reviews so your contracts stay compliant and commercially fit‑for‑purpose.

If you’d like a consultation on identifying, disclosing and managing substantially prejudicial terms in your contracts, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no‑obligations chat.