Professional indemnity risks, what they are and how claims arise

A professional indemnity risk is the risk that a client will hold your business liable for financial loss caused by a mistake, omission or failure in the professional services or advice you provide. It is not a vague worry about unhappy clients; it is a specific, measurable legal exposure. If a client loses money because your work fell short of the standard a reasonably competent practitioner would meet, they can sue you, and that lawsuit is what the term really points at: the risk of being sued for professional negligence.

This article covers what turns everyday work into a professional indemnity risk, what a client has to prove to win, the defences and sharing rules the law gives professionals, how professional indemnity (PI) insurance actually responds, and the misconceptions that cost businesses the most.

What a professional indemnity risk is

Any business that gives advice, designs things, or handles a client's money or affairs carries professional indemnity risk. The trigger is rarely deliberate wrongdoing. It is usually an honest failure somewhere in the ordinary course of work, such as:

• Mistakes or omissions: errors in a report, design, valuation, or piece of advice that the client relies on
• Incorrect information: telling a client something that turns out to be wrong, such as a tax position or a compliance requirement
• Missed deadlines: delay that causes the client to lose a deal, a grant, or a legal right
• Breach of duty: failing to act in the client's interests where the law requires you to, or failing to warn them of a known risk
• Documentation failures: losing records, failing to keep proper files, or not following instructions in writing

These circumstances do not automatically become claims. A claim exists when the client asserts that your failure caused them loss and demands compensation, usually through a lawyer's letter, mediation, or court proceedings. The size of the claim tracks the size of the client's loss, which is why one bad file can expose a small firm to a six-figure demand.

What a client has to prove

A professional indemnity claim is almost always a negligence claim, and the client carries the burden of proof. To win, the client must establish three things. First, that you owed them a duty of care, which for a professional is usually straightforward: it arises as soon as you take on the engagement and the client reasonably relies on your skill. Second, that you breached that duty by falling below the standard of care. Third, that the breach actually caused their loss, and that the loss was not too remote from your failure.

The general principles of negligence are set out in s 5B of the Civil Liability Act 2002 (NSW) (the Act), which mirrors the position across Australia: a person is negligent only if the risk was foreseeable, the risk was not insignificant, and a reasonable person in the same position would have taken precautions against it. For a professional, the yardstick is the reasonably competent practitioner in the same field, not a flawless one. A firm is not liable simply because its advice was wrong, or because a different practitioner would have done it differently. It is liable when its work fell below the level a client is entitled to expect from a competent professional in that line of work.

The peer professional opinion defence

Australian law gives professionals a defence that is easy to overlook when assessing risk. Under s 5O of the Civil Liability Act 2002 (NSW), a professional does not incur liability in negligence for a professional service if they acted in a manner that, at the time the service was provided, was widely accepted in Australia by peer professional opinion as competent professional practice. The court cannot rely on that opinion if it considers it irrational, and there can be more than one widely accepted school of professional opinion.

The practical effect is that the question at the heart of most PI claims is not "did the client lose money?" but "would other competent professionals in the field have done what we did?" That is why expert evidence is the centre of gravity in professional negligence litigation. It also means the best risk management is not defensiveness but documentation: if you can show your reasoning, your methodology and your file notes, you have something to put before a peer expert who is asked whether your approach was competent.

When the claim is not framed as negligence

Clients do not always plead negligence. A claim against a professional can be framed in several ways, and the same set of facts can support more than one cause of action:

• Misleading or deceptive conduct: s 18 of the Australian Consumer Law (Schedule 2 of the Competition and Consumer Act 2010 (Cth)) provides that a person must not, in trade or commerce, engage in conduct that is misleading or deceptive or is likely to mislead or deceive. Advice that overstates a likely outcome, a report that asserts certainty a professional knows it cannot have, or a marketing claim about qualifications or results can all attract this claim, and negligence does not have to be proved.
• Breach of contract: the engagement letter or services agreement usually contains implied or express promises about care and skill. Failing to deliver what the contract promised is a claim in its own right.
• Breach of fiduciary duty: advisers who hold a position of trust, such as agents, brokers and some financial advisers, owe duties of loyalty and disclosure beyond ordinary care.

A client's lawyer will plead every cause of action that fits. The risk assessment should therefore cover not just whether you were careless, but whether anything you said or produced could reasonably be read as misleading.

How liability is shared: proportionate liability

A professional is rarely the only party connected to a client's loss. The client's own decisions, other advisers, contractors, or suppliers often contributed. Australian law responds to this through proportionate liability. Under Part 4 of the Civil Liability Act 2002 (NSW), where a claim is an apportionable claim and the defendant is a concurrent wrongdoer, liability is limited to the proportion of the loss that the court considers just, having regard to the extent of the defendant's responsibility. A defendant who is 30% responsible pays 30%, not the whole loss.

There is an important carve-out: s 34A of the Act provides that a concurrent wrongdoer who intended to cause the loss or fraudulently caused it cannot rely on apportionment. That mirrors the insurance position, discussed below. The practical point for a professional is that proportionate liability is a shield, not a comfort. You can still be pursued for your full share, you may need to be joined in proceedings to protect your position, and the client's shortfall risk means claims against you can be substantial even where your role was peripheral.

A worked example: the structural report

Consider Meridian Design, a five-person structural engineering firm in Melbourne. A property developer engages it to assess a warehouse before a fit-out. Meridian's report states that the structure is sound and suitable for the intended use, but the engineer's inspection was largely visual, and a corroded roof beam goes unremarked. The developer proceeds. Eighteen months later, part of the roof fails during a storm, the fit-out is damaged, and the developer loses about $450,000 in repairs, delays and lost tenants.

The developer sues Meridian for negligence and misleading or deceptive conduct, arguing that a reasonably competent structural engineer would have specified closer inspection of the corrosion, and that the report's unqualified statement misled it into proceeding. Meridian's PI insurer is notified immediately and takes over the defence. Two expert engineers are briefed. One says the inspection scope was within accepted practice for a building of that age; the other says a competent engineer would have required intrusive testing given visible staining. The court finds the peer professional opinion evidence divided but accepts that the inspection was below the standard a client is entitled to expect. It apportions liability 60% to Meridian and 40% to the contractor who noticed the staining during the fit-out and did not stop the work.

The claim was made three years after the report was issued, which is exactly why the claims-made nature of the cover mattered, and why the firm's legal costs, the experts' fees and the 60% share of the loss were met by the policy. Had Meridian changed insurers or retired in the meantime without run-off cover, the claim would have landed on a firm with no policy to respond to it.

How PI insurance actually responds

Professional indemnity insurance is the financial response to the risk. Its defining feature is that it is written on a claims-made basis: the policy responds to claims first made and notified to the insurer during the policy period, regardless of when the underlying work was done. This has consequences that surprise many professionals:

• Cover follows the notification, not the mistake: Work done years ago is covered only if a policy is in force when the claim is made and the claim is notified within the policy period.
• Run-off cover is essential on exit: Retiring, selling the business, or switching insurers without run-off cover leaves past work exposed to claims that arrive later.
• Notification duties are strict: Policies typically require you to notify the insurer of circumstances that may give rise to a claim, not just formal claims. Failing to notify can cost you the cover.
• Defence costs are the real value: Policies pay the legal costs of investigating and defending claims, including claims that turn out to be baseless.
• Deliberate wrongdoing is excluded: PI policies do not respond to fraud or dishonest conduct, consistent with s 34A of the NSW Act denying apportionment to intentional wrongdoers.

When PI cover is compulsory

For some professionals, professional indemnity insurance is not a choice. Registered tax agents and BAS agents must maintain PI insurance that meets the Tax Practitioners Board's requirements as a condition of registration. Solicitors must hold or be covered by an approved policy under the Legal Profession Uniform Law before engaging in legal practice in NSW. Architects practising in Victoria must be covered by professional indemnity insurance, and registered health practitioners must hold professional indemnity insurance arrangements that meet the registration standards set by AHPRA and the national boards. Large corporate clients also commonly require contractors and advisers to hold PI cover as a contractual condition of engagement. For many professionals the real question is not whether to buy cover, but whether the cover they hold actually matches the risks described in this article.

Common misconceptions

Three misconceptions cause most of the avoidable damage in this area.

The first is "we were not negligent, so there is no risk." Claims are made against professionals who did nothing wrong every day, and defending them costs money regardless of the outcome. The value of PI cover is as much about defence costs as about paying judgments.

The second is "our contract excludes liability, so we are safe." Limitation clauses in engagement letters are useful, but they cannot exclude liability for fraud, they may be read down by a court or challenged where the client is a consumer, and they do nothing about a misleading conduct claim framed under the ACL. A clause can reduce a claim; it rarely eliminates it.

The third is "PI insurance covers everything we do." The exclusions are real: deliberate dishonesty, claims arising from circumstances known before the policy started, and work falling outside the described business activities. The claims-made trigger adds a fourth trap, which is that a policy only helps if the claim is notified in the right period. A policy that is not notified in time is as useful as no policy at all.

When a lawyer is worth the call

The point at which professional indemnity risk stops being a concept and becomes a problem is usually identifiable. A lawyer's role at each stage is specific. Before the work starts, a lawyer reviews your engagement letters, limitation clauses and standard terms so that expectations about scope, deadlines and liability are set in writing rather than left to inference. When a client complains, a lawyer advises on whether the complaint is a notifiable circumstance under your policy, how to respond to a demand letter without making admissions, and what the insurer needs to be told. If proceedings are issued, the lawyer coordinates with the insurer's panel, briefs experts, negotiates settlement, and manages the dispute through mediation or court.

The benefit of early involvement is that most of the decisions that determine the cost of a claim are made in the first weeks: whether to notify, what to say to the client, and what to preserve. Getting those decisions right is dramatically cheaper than litigating their consequences.

The notification question every firm should be able to answer

If there is one detail from this article worth carrying into your practice, it is the interaction between the claims-made trigger and your notification duty. A claims-made policy is worthless if a claim arrives and you have not notified the insurer of the circumstances that preceded it. The misstep that costs the most is rarely the original error; it is the silence that follows it.

So ask yourself the question the whole concept comes down to: do you know what your policy counts as a circumstance you must notify, and does everyone in your firm who deals with clients know it too? If you cannot answer that without checking, that gap in knowledge is itself a professional indemnity risk, and it is the one most worth fixing first.