Contractual Liability and Public Liability: How Contracts Affect Your Cover
If you run a small business in Australia, chances are you’ve signed a contract that requires you to hold public liability insurance. You might have done it without a second thought—a venue hire agreement, a subcontractor arrangement, or a supply contract. What many business owners don’t realise is that these contractual obligations can fundamentally alter the scope of your cover, sometimes in ways that leave you exposed. The legal principle here is straightforward but often misunderstood: your public liability policy responds to your legal liability, but that liability can be expanded, narrowed, or even created by the contracts you sign. This article will walk you through how contractual liability interacts with public liability insurance, what to watch for, and how to protect your business.
The Distinction Between Legal Liability and Contractual Liability
Public liability insurance in Australia is designed to cover your legal liability for third-party injury or property damage arising from your business operations. That legal liability typically stems from common law duties of care (negligence) or statutory obligations under state Civil Liability Acts, such as the Civil Liability Act 2002 (NSW) or the Wrongs Act 1958 (Vic). However, when you sign a contract, you may voluntarily assume additional liabilities that go beyond what the law would otherwise impose.
How Contracts Create “Upside-Down” Risk
Consider a standard scenario: you’re a plumber hired to fix a leak in a commercial building. The building owner’s contract requires you to indemnify them for any damage caused during your work, even if the damage results from their own negligence. Under common law, you would only be liable for damage caused by your own negligence. But by signing that clause, you’ve agreed to take on liability for someone else’s fault. This is what insurers call “contractual liability”—liability that exists solely because of the contract, not because of your legal wrongdoing.
Most standard public liability policies exclude liability that arises under contract unless that liability would have existed in the absence of the contract. This is a critical point. If your policy contains a contractual liability exclusion, and you’ve signed an indemnity clause that shifts risk onto you, you may find yourself without cover when a claim arises.
Key Contractual Clauses That Affect Your Public Liability Cover
Not all contract clauses are created equal. Some are routine and easily covered by your policy; others are minefields. Here are the most common clauses that interact with your public liability insurance.
Indemnity Clauses
An indemnity clause requires one party to compensate the other for losses, damages, or claims. In a typical public liability context, you might agree to indemnify a venue owner for any injury to your staff or damage to their property. The danger arises when the indemnity clause is “broad form”—requiring you to indemnify the other party even for their own negligence.
Australian courts have historically taken a strict approach to interpreting indemnity clauses. In a Queensland tribunal case, a contractor was held liable under a broad indemnity clause even though the injury was caused by the principal’s defective equipment. The court found the clause unambiguous, and the contractor’s public liability insurer declined cover because the liability arose solely under contract.
”Hold Harmless” and “Waiver of Subrogation” Clauses
These are cousins of indemnity clauses. A “hold harmless” clause prevents you from suing the other party for their negligence. A “waiver of subrogation” clause prevents your insurer from recovering money from the other party after paying a claim. Both can create problems because your insurer’s right to subrogation (to pursue the at-fault party) is a standard feature of public liability policies. If you waive that right, your insurer may refuse cover or impose additional conditions.
Insurance Requirements and Additional Insured Clauses
Many contracts require you to name the other party as an “additional insured” on your public liability policy. This is common in construction, events, and venue hire. While this can be accommodated by most insurers, it’s not automatic. You need to specifically request this endorsement, and it may increase your premium. Without it, the other party may have no cover under your policy, potentially voiding the contract.
As of 2026, typical premium increases for adding an additional insured range from $100 to $500 per year, depending on the risk profile. For small businesses, this is usually manageable, but it’s a cost that should be factored into your contract negotiations.
Non-Negligence Liability Clauses
Some contracts impose liability on you regardless of fault. For example, a venue hire agreement might state that you are responsible for any damage to the venue, even if it was caused by a third party or an act of nature. This is “strict liability” created by contract. Standard public liability policies are designed for fault-based liability, not strict liability. If you agree to such a clause, you may need a specialised policy or a contractual liability endorsement.
How Insurers Assess Contractual Liability Risks
Insurance is a business of assessing and pricing risk. Contractual liability is a well-known risk factor, and insurers have developed specific approaches to managing it.
The “Insuring Clause” and Exclusions
Your public liability policy’s insuring clause typically covers sums you become “legally liable to pay” as damages for third-party injury or property damage. The key phrase is “legally liable.” Most policies then include an exclusion for liability assumed under contract, unless that liability would have existed in the absence of the contract. This is known as the “contractual liability exclusion.”
However, there is an exception. If you would have been liable at common law anyway, the exclusion does not apply. For example, if you negligently cause a fire that damages a client’s building, your common law liability exists regardless of any contract you signed. The exclusion only bites when the contract creates liability that wouldn’t otherwise exist—like indemnifying the client for their own negligence.
Policy Endorsements
If your business regularly signs contracts with indemnity clauses, you can purchase a contractual liability endorsement. This extends cover to include liability assumed under contract, subject to certain conditions. Premiums for this endorsement vary widely. For a small trades business in 2026, you might pay an additional $400–$1,200 per year for a contractual liability endorsement with a $2,000–$5,000 excess.
Not all insurers offer this endorsement, and those that do may impose strict underwriting criteria. You’ll typically need to provide copies of your standard contracts and demonstrate that you have risk management procedures in place. Platforms like BizCover can help you compare policies that include contractual liability cover, but you should always read the product disclosure statement (PDS) carefully.
The “Known Risk” Doctrine
Under the Insurance Contracts Act 1984 (Cth), you have a duty of disclosure. If you know that you regularly sign contracts with broad indemnity clauses, and you fail to disclose this to your insurer, you risk having your policy voided for non-disclosure. This is a common trap. Business owners often assume that all public liability policies are the same, or that their broker will handle everything. In reality, you are legally responsible for disclosing any “known risk” that would affect the insurer’s decision to accept or price the risk.
In a 2024 AFCA determination, a small cleaning business had its claim declined because it failed to disclose a standard contract clause that required it to indemnify the client for any damage, regardless of fault. AFCA upheld the insurer’s decision, noting that the business owner had signed the contract without reading it and had not informed the insurer. The lesson is clear: ignorance is not a defence under the Insurance Contracts Act.
State-by-State Differences in Contractual Liability
Australia’s federal system means that contractual liability is governed by a patchwork of state laws. While the Insurance Contracts Act is Commonwealth legislation, the underlying liability is determined by state law.
Civil Liability Acts and Proportionate Liability
Most states have enacted Civil Liability Acts that modify the common law, particularly in relation to proportionate liability. Under proportionate liability, a defendant is only liable for their share of the fault, not the entire loss. This can affect how contractual liability is assessed.
For example, in New South Wales, the Civil Liability Act 2002 applies proportionate liability to claims for economic loss. If you are 30% at fault, you are only liable for 30% of the damages. However, if your contract contains an indemnity clause that requires you to pay 100% of the loss, the proportionate liability provisions may be overridden. The interaction between contract and statute is complex, and courts will look at the specific wording of the clause.
Queensland and Western Australia
Queensland and Western Australia have their own unique approaches. In Queensland, the Civil Liability Act 2003 includes provisions that limit the enforceability of certain indemnity clauses, particularly in construction contracts. If you are a subcontractor in Queensland, you may be protected from broad indemnity clauses that seek to shift liability for the principal’s negligence. However, this protection is not absolute and depends on the type of contract and the parties involved.
Western Australia’s Civil Liability Act 2002 (WA) has similar provisions but with different thresholds. As a general rule, if you operate in multiple states, you should have your contracts reviewed by a lawyer who is familiar with the laws of each jurisdiction.
The Construction Industry Exception
The construction industry has its own specific rules under state Work Health and Safety (WHS) Acts. In some states, indemnity clauses that seek to shift liability for workplace injuries are void. For example, under the Work Health and Safety Act 2011 (NSW), a contract cannot exclude or limit a person’s liability for their own negligence that causes a workplace injury. This means that even if you sign a contract indemnifying a principal for their own negligence, the clause may be unenforceable in relation to WHS claims.
This creates a paradox: you may have contractual liability that is unenforceable at law, but your insurer may still decline cover because the clause exists on paper. The safest approach is to avoid such clauses altogether, or to have them specifically endorsed on your policy.
Practical Steps to Protect Your Business
Given the complexity of contractual liability, here are actionable steps you can take to protect your business.
1. Read Your Contracts Before Signing
This sounds obvious, but many business owners sign contracts without reading the fine print. Focus on clauses related to indemnity, hold harmless, additional insured, and waiver of subrogation. If a clause requires you to assume liability for someone else’s negligence, flag it immediately.
2. Negotiate Contractual Terms
You are not obligated to accept every clause. If a client insists on a broad indemnity clause, push back. Explain that your public liability insurance may not cover it, and that a narrower clause (e.g., indemnity for your own negligence only) is standard practice. Many clients will accept this if you present it professionally.
3. Disclose All Contracts to Your Insurer
When applying for or renewing your public liability policy, provide copies of your standard contracts. If you use different contracts for different clients, disclose the most onerous one. Your insurer can then advise whether you need a contractual liability endorsement.
4. Consider a Contractual Liability Endorsement
If you regularly sign contracts with indemnity clauses, a contractual liability endorsement is worth the investment. The additional premium is usually modest compared to the risk of an uncovered claim. For most small businesses, the cost ranges from $400 to $2,000 per year, depending on the industry and the scope of cover.
5. Use a Comparison Platform Wisely
When shopping for public liability insurance, use a comparison platform like BizCover to see which policies offer contractual liability cover. But remember: not all policies are the same. Read the PDS carefully, and if in doubt, speak to a broker or insurer directly. A policy that is $200 cheaper per year may exclude contractual liability entirely, leaving you exposed.
6. Keep Records of Contract Negotiations
If you successfully negotiate a change to a contract clause, keep a record. This can be invaluable if a dispute arises later. Similarly, if a client refuses to change a clause, document that too. Your insurer may need to see this evidence to assess your claim.
FAQ
What is the difference between public liability and contractual liability insurance?
Public liability insurance covers your legal liability for third-party injury or property damage arising from your business operations. Contractual liability insurance (often an endorsement) covers liability you assume under contract that would not otherwise exist at law. The two are not the same, and many standard policies exclude contractual liability.
Do I need to tell my insurer about every contract I sign?
You have a duty of disclosure under the Insurance Contracts Act 1984 (Cth). You do not need to disclose every routine contract, but you must disclose any contract that imposes unusual or onerous liability on you, such as broad indemnity clauses. If in doubt, disclose it.
Can my public liability policy cover me for a contract I signed before getting insurance?
It depends on the policy. Most policies cover claims that arise during the policy period, regardless of when the contract was signed. However, if the contract was signed before the policy started, and you failed to disclose it, the insurer may have grounds to decline cover for non-disclosure.
What happens if I ignore a contractual liability exclusion and sign a contract anyway?
You are taking a significant risk. If a claim arises under that contract, your insurer may decline cover, leaving you to pay the claim out of pocket. In some cases, you may also be in breach of your duty of disclosure, which could void your entire policy.
Are indemnity clauses enforceable in all states?
No. Some states, like Queensland, have laws that limit the enforceability of certain indemnity clauses, particularly in construction contracts. However, these protections are not universal, and you should not rely on them without legal advice.
Can I add an additional insured to my policy after signing a contract?
Yes, but you need to request this from your insurer before the contract takes effect. Adding an additional insured after a claim has occurred is usually not possible. The process is straightforward and typically costs $100–$500 per year.
How do I know if my contract has a problematic clause?
Look for language like “indemnify,” “hold harmless,” “waiver of subrogation,” “additional insured,” and “non-negligence liability.” If you see these terms, have the contract reviewed by a lawyer or insurance broker before signing.
What should I do if my insurer declines cover for a contractual liability claim?
First, review your policy and the declinature letter carefully. If you believe the decision is incorrect, you can lodge a complaint with the insurer’s internal dispute resolution team. If that fails, you can escalate to the Australian Financial Complaints Authority (AFCA). AFCA determinations are binding on insurers but not on you.