How professional indemnity insurance works in Australia

If your business sells advice, design, or expertise, a client who loses money because of your work can turn to you for compensation. Professional indemnity (PI) insurance exists to cover that risk. It is a policy that indemnifies your business when a client alleges that your services or advice were negligent, misleading, or otherwise caused them a financial loss.

The cover is built for service businesses, because their core risk is a mistake in judgement, not physical injury or property damage. Understanding how the policy actually operates matters, because PI insurance works differently from most other cover you will buy. This article walks through the mechanism: what triggers a claim, what the policy pays, where it stops, when the law makes it compulsory, and the timing traps that decide whether you are covered.

The players in a professional indemnity claim

A PI policy sits between four groups whose interests overlap and occasionally collide:

Your business: The insured. You pay the premium, answer the proposal questions, and carry the duties of disclosure and notification that make the cover work.
The insurer: Agrees to indemnify you within the policy's limit and terms, and usually controls or consents to the defence of claims.
The client: The claimant. They allege your advice or services caused them loss, and their claim is what triggers the policy.
Regulators and clients: Regulators such as ASIC, the Tax Practitioners Board, and state law societies set minimum cover for some professions. Your own clients often mandate minimum limits in their procurement contracts.

A broker places the policy and a lawyer reviews the wording and aligns it with your client contracts. Both earn their keep at the points where the mechanism bites, which we come to below.

The trigger: claims are made, not caused

The single most important feature of PI insurance is its trigger. PI policies are written on a "claims made and notified" basis. The policy that responds is the one in force when the claim, or a circumstance that may give rise to a claim, is first notified to the insurer, not the policy that was in force when you did the work.

Insurers explain the point plainly: the event that caused the loss can sit years in the past, but the notification must land within the period of the current policy. Imagine you designed a website for a client in 2021. In 2026 the client alleges the design caused them lost revenue and demands compensation. The policy that responds is the one you hold in 2026, provided you notify the insurer promptly.

Because a claim may not be made until long after the work, most policies also allow you to notify a "circumstance" during the policy period. If you become aware of a fact, situation, or complaint that may later give rise to a claim, notifying it in writing preserves cover for that matter, even if the formal claim arrives years later. Miss the window and the insurer can decline the claim entirely.

What the policy responds to

Subject to the wording of your particular policy, PI cover typically responds to claims that your professional services caused financial loss. The usual inclusions are:

Negligent advice or services: Claims that you breached your professional duty of care to the client.
Unintentional misrepresentation: Misleading statements made without dishonesty.
Defence costs: Legal costs to investigate and defend a covered claim, which can be substantial even when you did nothing wrong.
Vicarious liability: Liability for the acts of employees, and sometimes of contractors working under your supervision.

The legal claims behind these losses often come from outside the professional negligence framework. The Australian Consumer Law (the ACL), Schedule 2 of the Competition and Consumer Act 2010 (Cth), prohibits misleading or deceptive conduct in trade or commerce under s 18, and when you supply services to a consumer, ss 60-61 guarantee the services will be rendered with due care and skill and will be reasonably fit for the purpose the consumer made known. A client who feels misled about what your service would achieve can frame a claim under these provisions, which is why your policy, your contracts, and your marketing need to be consistent.

Where cover stops

Policy wordings vary between insurers, but the exclusions follow familiar patterns. Check the Product Disclosure Statement (PDS) and schedule for yours. Common exclusions are:

Known circumstances: Issues you were aware of, or should reasonably have been aware of, before the policy commenced.
Deliberate wrongdoing: Fraud, dishonesty, and intentional breaches, along with fines and penalties.
Bodily injury and property damage: These belong to public liability cover, not PI.
Liability assumed under contract: Broad indemnities and warranties you volunteer in a client contract are often excluded to the extent they go beyond the liability the law would impose on you anyway.
Excluded services: Work outside the business activities you declared to the insurer.

The contractual liability exclusion is the one that most often surprises business owners. If you sign a client agreement promising to indemnify the client for losses they suffer for any reason, including matters that are not your fault, your PI insurer will typically not pick up that liability, because it is broader than your legal liability.

When the law makes cover compulsory

For several professions, PI insurance is not a choice but a condition of holding a licence or registration:

Financial services: An Australian financial services licensee that provides services to retail clients must have compensation arrangements under s 912B of the Corporations Act 2001 (Cth). ASIC's guidance is that a licensee with retail clients must hold professional indemnity insurance to satisfy the requirement.
Tax agents and BAS agents: The Tax Agent Services Act 2009 (Cth) makes PI insurance meeting the Tax Practitioners Board's requirements a condition of registration (s 20-5) and an ongoing obligation under the Code of Professional Conduct (s 30-10).
Legal practitioners: In New South Wales, and in the other states that have adopted the Uniform Law, law practices and barristers must hold an approved PI policy under s 95 of the Legal Profession Uniform Law Application Act 2014 (NSW).

Beyond the statutory requirements, larger clients routinely make PI cover a condition of engagement, often specifying minimum limits, particular endorsements, and proof of currency before they will sign. Even without a legal mandate, an uninsured professional services business will find itself locked out of significant contracts.

Time is built into the policy: retroactive dates and run-off

Because the trigger is notification, not the work, PI policies handle time in two ways you need to understand.

The first is the retroactive date. The policy covers work done after that date, and claims for work before it are excluded. If your policy has a retroactive date of, say, 2022, a claim about work you did in 2019 will not be covered, even though the claim is notified today. Insurers commonly offer unlimited retroactive cover, which reaches back to when the business began, and it is usually worth asking for. When you switch insurers, continuity matters: a new insurer's retroactive date may not reach back as far as your old policy, leaving a gap that claims can fall into.

The second is run-off cover. Since claims can arrive years after the work, stopping trading does not end your exposure. If you retire, close the business, or sell it, you may need run-off cover, which allows claims about past work to be notified after the business has stopped. Brokers warn that without it, a claim that emerges after you have left the profession falls on you personally. Run-off is a real cost of exiting a professional services business, and it should be factored into sale negotiations and retirement planning.

Limits, sub-limits, and defence costs

The limit of indemnity is the maximum the insurer will pay for all claims notified in a policy period. Choosing the number is a commercial decision that should reflect your worst credible loss, the size of your engagements, and what clients require. Limits of $1 million to $5 million are common for many small businesses, with larger or regulated engagements needing more.

Two details in the wording decide how far the money actually goes. First, whether defence costs are "inclusive" of the limit or "in addition" to it. If costs are inclusive, every dollar spent defending the claim reduces what is left to pay the client. Second, sub-limits. Inquiry costs, privacy and cyber incidents, and intellectual property claims are often capped at less than the headline limit, so read the schedule closely rather than assuming the full limit applies to every claim. You will also typically pay an excess per claim.

Disclosure: the duty you cannot skip

Australian insurance law places a positive duty on you before the policy is entered into. Under s 21 of the Insurance Contracts Act 1984 (Cth), you must disclose every matter known to you that you know, or a reasonable person could be expected to know, is relevant to the insurer's decision whether to accept the risk and on what terms. That means revenue, services, qualifications, subcontracting, claims history, complaints, and any circumstances that might give rise to a claim.

A failure to disclose, or a misrepresentation in the proposal, is a "relevant failure" under the Act, and it can let the insurer reduce or refuse to pay a claim. This is how a hurried proposal form becomes a reason your cover does not respond years later. Complete the forms as if every answer might be read out in a dispute, because it might be.

Where professional indemnity claims commonly go wrong

The failures repeat themselves, and they are worth naming:

Late notification: A client complaint arrives, the business hopes it will blow over, and nobody tells the insurer. When the claim hardens, the notification is outside the policy period and cover is declined. This is the most expensive mistake in PI insurance.
Losing retroactive continuity: Switching insurers to save a premium without checking the retroactive date and how prior known circumstances are treated.
Signing over-broad indemnities: Client contracts that promise more than your legal liability, creating exposure the policy will not cover.
Forgetting the policy as the business changes: Adding a new service line, taking on subcontractors, or entering new jurisdictions without telling the insurer can leave the new work outside the declared activities.

Each of these is fixable if caught early, which is why the timing habits below matter more than the premium.

When a lawyer is worth engaging

A broker is the right person to shop the market and explain competing wordings. A lawyer earns their fee at the points where the policy meets your contracts and your legal duties.

Before you buy or renew, a lawyer can review the policy wording against your actual client contracts: whether your liability cap, indemnities, and exclusions for consequential loss line up with what the insurer will actually pay. Broad indemnities in your contracts create uninsured liabilities, and a liability cap that sits above your limit of indemnity can leave a gap you fund yourself. Where the law makes cover compulsory, a lawyer can also confirm what your licence or registration actually requires and what evidence you need to keep.

When a claim or settlement looms, the insurer's consent obligations matter. Settling a dispute in a way the insurer has not approved can compromise your cover, and a deed of release that does not align with the insurer's requirements can reopen the matter. Getting advice before you sign anything protects both the claim and the cover.

The notification decision

Every professional services business will eventually face the same fork in the road: a client is unhappy, a complaint has been made, and the question is whether to tell the insurer. Silence feels cheaper, but under a claims-made policy it is the decision that most often destroys cover. The policy that responds is the one you notify in time, so treat any complaint or error that might grow into a claim as a notification candidate, and when in doubt, notify in writing within the policy period.

The same early mindset applies to buying the cover itself. A conversation with a broker about limits, retroactive date, and run-off, and a lawyer's review of how your contracts sit against the wording, costs far less than the gap it closes. If you are setting up a professional services business, changing insurers, or reviewing terms a client has sent you, it is worth getting advice before the claim, not after it.