Professional indemnity vs public liability: what’s the difference?

The difference in one line

Public liability is about accidents: someone is hurt, or something that belongs to someone else is damaged, because of your business. Professional indemnity is about the quality of your work: a client says your advice, design or professional service was negligent and it cost them money. Nobody needs to be hurt for a PI claim, and nobody’s advice needs to be wrong for a public liability claim.

The confusion is understandable. Both are “liability” insurance, both pay compensation you are legally liable for, and both pay legal costs to defend a claim. But they are written around different events, and the exclusions in each are designed to hand the other kind of claim to the other policy.

The five wordings we read

We read the liability section of two Australian public liability wordings and three professional indemnity wordings end to end, each downloaded from its insurer’s own website. Blue Zebra is one of the insurers Gary quotes business insurance with. Where we quote a wording below, the words are the insurer’s, with the clause.

Other wordings differ, and limits and excesses live in each policy’s schedule. Treat the quotes here as examples of how the market commonly draws the line, not as a description of any particular policy.

What public liability is built for

A public liability policy pays compensation you become legally liable to pay for injury to other people and damage to their property. Blue Zebra’s insuring clause is typical:

“personal injury and property damage happening during the period of insurance within the territorial limits as a result of an occurrence in connection with your business or products”Blue Zebra, Business Insurance BZC0002 V6 11/21, Business Liability

Two definitions do most of the work. Personal injury is wider than a broken arm: Blue Zebra’s includes “bodily injury, death, sickness, disease, shock, fright, mental anguish, mental injury”, and goes on to false arrest, invasion of privacy and some defamation. Property damage means “physical damage to or loss of or destruction of tangible property including loss of use of that property”. Both are about something physical happening to someone else.

That is why public liability isn’t only for trades. A bookkeeper who knocks a client’s laptop off a desk, a consultant whose visitor trips on a cable, and a florist whose display falls on a customer all have public liability claims, and none of them involves their professional skill.

Products, and the extensions worth knowing

Most business liability policies also cover products liability: injury or damage caused by something you sold, supplied, installed or repaired, after it has left your hands. Blue Zebra applies a separate aggregate limit to products claims for the whole policy period.

Extensions fill in the edges. Blue Zebra’s include liability to a principal you do work for, up to what your contract requires; damage to property in your care, such as premises you temporarily occupy to carry out work; and sudden and accidental pollution. These are the extensions a head contractor or landlord often asks about.

Work that damages other property is covered even where fixing the work itself is not. Ansvar’s faulty workmanship exclusion spells out the carve-back:

“This exclusion shall not apply to liability to pay compensation for damage to other property resulting from such work or service”Ansvar, General Public & Products Liability AUSPOLGPL I90 0621 V1.0, exclusion 7.1

What professional indemnity is built for

Professional indemnity insurance responds to a different kind of claim: that you breached a professional duty and a client lost money as a result. There is no need for an injury or a broken object. DUAL’s insuring clause is short:

“We agree to pay to or on behalf of the insured all loss arising from any claim for any civil liability in relation to the conduct of the policyholder’s professional business.”DUAL, Consultants PI 11.20 v3, insuring clause 2.1

“Civil liability” covers negligence and, in most PI wordings, related claims such as misleading conduct, unintentional breach of confidentiality or defamation in the course of your services. Chubb and Delta word their insuring clauses around “Professional Services”, defined by what your schedule describes.

Two features set PI apart. It is tied to the services described in your schedule, so work outside that description can sit outside the cover. And it is written on a claims-made basis, which changes what happens when you change insurers or stop working. Both are covered in depth in our guide to professional indemnity conditions.

Typical PI claims: a marketing strategy that wasted a client’s budget, a tax structure that cost a client more than it saved, software that didn’t do what was specified, a set of plans that didn’t comply, or advice about a purchase that turned out badly.

Where the two meet

Each policy carries an exclusion designed to hand the other’s claims across. Public liability excludes professional advice:

“the provision of or failure to provide professional advice or service provided by an insured entity or any error or omission connected therewith”Blue Zebra, Business Insurance BZC0002 V6 11/21, Business Liability exclusion 14

Ansvar’s exclusion 21.2 is to the same effect. Professional indemnity, in turn, excludes injury and property damage, but with a carve-back that matters:

“any event described in subparagraphs 4.4 (a) or (b) above that results directly from the performance of or failure to perform Professional Services”Delta, Miscellaneous PI 01/24, exclusion 4.4

DUAL’s bodily injury exclusion likewise applies “unless it results directly from the insured’s conduct of the policyholder’s professional business” (5.5). Put the two exclusions together and the line becomes clear:

• Injury or damage caused by a professional error (an engineer under-specifies a beam and a balcony fails) is generally a PI claim. The public liability policy excludes it as professional service; the PI policy carves it back in.
• Injury or damage caused by carelessness on the job (the same engineer knocks over a client’s display on a site visit) is generally public liability.
• Financial loss caused by professional work is PI, whether or not anyone is hurt.

Free advice, and advice about your products

Public liability policies often extend to some advice, but read the words closely. Blue Zebra’s professional liability extension covers:

“compensation for personal injury or property damage arising from the provision of, or failure to provide professional advice or service by an insured entity or any error or omission connected therewith where: a. such professional advice or service is given not for a fee”Blue Zebra, Business Insurance BZC0002 V6 11/21, Business Liability extension 6

The extension also reaches medical advice from first aid staff and advice about the use or storage of your products. In every case it is injury or property damage, not money. A friend who loses $40,000 on your free tax advice is not a public liability claim, and whether a PI policy responds can depend on whether its definition of professional services requires a fee.

One job, two losses

The same job can produce both kinds of claim. An IT contractor whose migration takes a client’s online shop down for a week, and who shatters a display case carrying the old server out, has a PI claim for the lost trading and a public liability claim for the glass. Each policy responds to its own part, subject to its terms.

What neither one covers

Holding both policies is a strong position, but several common claims fall between them. These are the ones that catch people out.

Your own employees

Injury to your own staff is workers compensation, which employers must hold under state and territory law. Public liability wordings exclude it, Blue Zebra’s for “personal injury to any of the insured entities’ employees arising out of or in the course of their employment in your business” (exclusion 7), and PI wordings exclude it too (DUAL 5.16).

Fixing your own work

“the cost of performing, completing, correcting or improving any work undertaken by you.”Blue Zebra, Business Insurance BZC0002 V6 11/21, Business Liability exclusion 8

Liability insurance pays for the damage your work causes to other things. Putting the work itself right is a cost of doing business.

Data and cyber incidents

Public liability is about tangible property, and Blue Zebra’s definition says so in as many words: “Tangible property does not include electronic data.” A breach of customer records, a ransomware attack or a payment redirection scam is what cyber insurance is written for. Our cyber insurance guide covers what those wordings ask.

Fines and penalties

“any fines, penalties, punitive, exemplary, aggravated, liquidated or multiplication of compensatory damages, taxes, levies, imposts or duties imposed by a court of law or under any statute”Ansvar, General Public & Products Liability AUSPOLGPL I90 0621 V1.0, exclusion 8

On top of the exclusions, work health and safety laws in a number of jurisdictions now make it an offence to insure against WHS fines.

Liability you take on in a contract

Both kinds of policy cover the liability the law places on you, not extra liability you agree to. More on that under what clients’ contracts ask for.

Your own property, vehicles and products recalls

Damage to your own premises, tools and stock is property insurance, not liability. Registered vehicles are usually covered by motor and compulsory third party insurance and excluded from public liability (Blue Zebra exclusion 18). Recalling a faulty product is excluded too (Blue Zebra exclusion 16).

Occurrence and claims-made: why timing differs

Public liability is generally written on an occurrence basis. Blue Zebra covers injury and damage “happening during the period of insurance”, so the policy that responds is the one in force when the accident happened, even if the claim arrives years later.

Professional indemnity is written on a claims-made basis. Delta’s notice puts it plainly: the policy “will only apply to Claims first made during the Policy Period or Extended Reporting Period, if applicable, and notified to Delta in writing” in that time. The policy that responds is the one in force when the claim is made, for work done after its retroactive date.

The practical difference shows up when you stop. Cancel public liability when you retire, and an old occurrence policy can still respond to an accident that happened while it was running. Cancel PI, and a claim about work you did last year may find no policy at all, which is why run-off cover exists.

What clients’ contracts ask for

Contracts are often where the question gets decided for you. It is common for a landlord, council, venue or head contractor to ask for a certificate of currency showing public liability of $10 million or $20 million, and for a client engaging a consultant or designer to ask for PI at a stated limit, kept in place for a number of years after the job ends.

Read the rest of the contract too. Both kinds of policy exclude liability you volunteer for beyond what the law would impose. Chubb’s PI exclusion is typical:

“any actual or alleged liability assumed under any contract, agreement or understanding except to the extent that such liability would have attached to the Insured in the absence of such contract”Chubb, Elite III Miscellaneous PI Ed. 04/21, exclusion 4.1

Blue Zebra’s public liability exclusion 4 excludes “any liability or obligation assumed by an insured entity under any agreement or contract”, then gives back a defined list, such as lease terms and incidental contracts. Guarantees of results, broad indemnities and fitness for purpose promises are the terms most likely to sit outside both policies.

Who commonly holds which

What a business holds depends on what it does, not its label. As a general picture of what is common in the market:

The pattern follows the definitions. If people come to you, or you go to them, public liability is commonly held. If clients pay for your advice, design or judgement, PI is commonly held. Many businesses do both, and our business insurance and professional indemnity pages set out what we can quote.

Want to try the line for yourself? The PI vs public liability quiz gives you twelve incidents and twenty seconds to answer each.

A PI and public liability checklist

Drawn from the wordings above. It is not a substitute for your own policy, which may ask for more, or less.

Questions people ask about PI and public liability

Sources

Policy wordings, read in full in September 2026:

• Blue Zebra Insurance, Business Insurance (Business Liability section) (PDS BZC0002 V6 11/21)
• Ansvar Insurance, General Public & Products Liability Insurance (AUSPOLGPL I90 0621 V1.0)
• DUAL Australia, Consultants Professional Indemnity (Wording 11.20 v3)
• Chubb Insurance Australia, Elite III Miscellaneous Professional Indemnity (Ed. 04/21, Chubb10-567-0421)
• Delta Insurance Australia, Miscellaneous Professional Indemnity (Delta PI 01/24)

More plain-English reading in Gary’s guides.