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Public Liability Insurance covers you if a third party is accidentally injured or their property is damaged as a result of your work. Professional Indemnity Insurance covers claims arising from negligent advice, design errors, or professional mistakes. PL responds to physical accidents. PI responds to professional errors. Tradespeople who design, specify, or advise often need both.
Public Liability Insurance and Professional Indemnity Insurance are two of the most widely discussed types of cover for tradespeople and contractors. Both protect your business from claims. Both involve a third party coming after you financially. But beyond that, they work in quite different ways, and confusing the two can leave you with a significant gap in your cover.
Here's a clear breakdown of what each policy does, how they differ, and who needs which.
What is Public Liability Insurance?
Public Liability Insurance protects you if a third party, such as a client, a member of the public, or anyone else who isn't employed by you, suffers an accidental injury or has their property accidentally damaged as a result of your work.
As a tradesperson, the scenarios are straightforward. A client trips over cables you've left across a doorway. A tool falls and damages a neighbouring property. A customer visiting your site is injured by materials stored in the wrong place. Public Liability Insurance covers compensation and legal costs arising from such incidents.
At Rhino, Public Liability Insurance costs from £62.50 a year and includes cover for accidental bodily injury to third parties, accidental damage to third-party property, legal defence costs associated with a claim, and Products Liability for injury or damage caused by products you've supplied.
What is Professional Indemnity Insurance?
Professional Indemnity Insurance covers you if a client suffers a financial loss because of negligent advice, a design error, or a mistake in the professional services you provided. The claim doesn't arise from a physical accident. It arises from what you told someone, drew up for them, or specified on their behalf.
For tradespeople, this becomes relevant when your role extends beyond physical labour into advice or design. A plumber drawing up plans for a new plumbing installation, a contractor specifying materials for a project, an electrician signing off on a system design - in all of these cases, the client is relying on your professional judgment. If that judgment turns out to be wrong and it costs them money, Professional Indemnity Insurance steps in.
At Rhino, Professional Indemnity Insurance starts from £60.00 a year and operates on a claims-made basis, meaning the claim needs to be made during the policy period rather than at the time the work was carried out.
What's the key difference?
The clearest way to separate the two is to ask: what caused the claim?
If a client is claiming because something physical went wrong during your work, such as an accident, damage, or an injury, that's a Public Liability matter.
If a client is claiming because advice you gave, a design you produced, or a specification you made turned out to be wrong or negligent, that's a Professional Indemnity matter.
A builder who accidentally knocks over a garden wall while working on a site needs Public Liability Insurance. A design-and-build contractor who specifies the wrong load-bearing capacity for that wall, causing structural problems months later, needs Professional Indemnity Insurance.
The two covers address two fundamentally different types of risk: the physical and the professional.
Who needs Public Liability Insurance?
Most tradespeople doing hands-on work on client premises or in public spaces need Public Liability Insurance. Plumbers, electricians, decorators, joiners, roofers, groundworkers: if you're working on someone's property and something could go wrong that injures them or damages what's around you, Public Liability Insurance is the essential cover.
Many clients and contractors also require you to show proof of Public Liability cover before you can start work. Commercial contracts typically specify a minimum of £1 million, and larger jobs often require £2 million or £5 million.
Who needs Professional Indemnity Insurance?
Professional Indemnity Insurance is for tradespeople and contractors who provide advice, design, specifications, or professional recommendations as part of their service. It's most relevant for:
Design-and-build contractors who specify materials or systems
Electricians who design electrical systems and certify them
Any trade where the client relies on your expertise and judgment, not just your labour
If your work is purely physical, i.e., you do what you're told to a specification drawn up by someone else, - Professional Indemnity Insurance is less likely to be relevant. If you're making professional recommendations that clients rely on, it's worth considering seriously.
It's also worth noting that some contracts and professional body memberships require Professional Indemnity Insurance, such as NAPIT and NICEIC. Check your specific requirements before assuming you don't need it.
Do I need both?
Potentially, yes. The two policies protect against completely different risks, and having one doesn't reduce your exposure on the other.
A design-and-build contractor, for example, faces both types of risk simultaneously. If they accidentally damage a client's property while on site, that's a Public Liability claim. If a specification error in their design causes a structural failure six months after completion, that's a Professional Indemnity claim. One policy without the other leaves a meaningful gap.
If your work is purely physical and you never provide professional advice or design services, Public Liability Insurance alone may be sufficient. But if there's any element of professional judgment or recommendation in what you deliver, it's worth exploring Professional Indemnity cover as well.
How much do they cost?
Here at Rhino, both policies are competitively priced for tradespeople:
Cost | Yearly | Monthly |
|---|---|---|
Public Liability Insurance | From £62.50 | From £5.21 |
Professional Indemnity Insurance | From £60.00 | From £5.00 |
Holding both policies together costs from £122.50 a year. For the protection they provide, that's a sensible trade-off.
If you employ anyone in your business, you'll also want to look at Employers' Liability Insurance, which is a legal requirement the moment you take on staff. And for work involving physical construction or renovation projects, Contractors All Risks Insurance protects the physical works on site.
You can also read The Ultimate Guide to Professional Indemnity Insurance for a deeper look at how the policy works and who it applies to.
Not sure which cover is right for your trade? Get an instant quote from Rhino and see how much it costs to protect your business properly.
Frequently Asked Questions
Public Liability Insurance covers you if a third party is accidentally injured or their property is damaged during your work. Professional Indemnity Insurance covers claims arising from negligent advice, design errors, or professional mistakes. Public Liability responds to physical accidents. Professional Indemnity responds to professional errors.
Most tradespeople doing hands-on work on client premises or in public spaces need Public Liability Insurance. Plumbers, electricians, decorators, joiners, roofers, and groundworkers all benefit from it. Many clients and contractors also require proof of cover before work begins, with commercial contracts typically specifying a minimum of £1 million.
Professional Indemnity Insurance is for tradespeople and contractors who provide advice, design, specifications, or professional recommendations as part of their service. It is most relevant for design-and-build contractors, plumbers who are designing and installing a new heating system, and electricians who design and certify systems. Some contracts and professional body memberships also require it.
For many tradespeople, yes. The two policies protect against completely different risks and having one does not reduce your exposure on the other. A design-and-build contractor faces both simultaneously: accidentally damaging a client's property is a Public Liability claim, while a specification error causing structural failure later is a Professional Indemnity claim. If your work is purely physical and you never provide professional advice or design services, Public Liability Insurance alone may be sufficient.
At Rhino, Public Liability Insurance costs from £ 62.50 a year (£ 5.21 per month), and Professional Indemnity Insurance costs from £ 60.00 a year (£ 5.00 per month). Holding both together costs from £122.50 a year.
