Public Liability vs Professional Indemnity: What Each Covers and Which You Need
Public liability and professional indemnity are both business liability covers, but they protect against different types of claim. This guide explains the distinction, who needs each, and when you need both.
The core difference
Both covers protect your business from third-party claims, but the trigger is different:
Public Liability (PL)
Triggered by: physical injury or property damage to a third party caused by your business activities
Example: a client slips on a wet floor at your studio and breaks their wrist. PL responds.
- Injury to members of the public
- Damage to a client's property
- Accidents on your premises or at a client's site
- Incidents during events you organise
Professional Indemnity (PI)
Triggered by: financial loss a client suffers because of your advice, designs, or professional services
Example: you design a website with an error that loses a client £30,000 in orders. PI responds.
- Negligent advice or recommendations
- Errors and omissions in professional work
- Breach of professional duty
- Copyright or IP infringement in your work product
Who needs which cover
| Business type | PL needed? | PI needed? |
|---|---|---|
| Tradesperson (plumber, electrician) | Yes | Sometimes (if designing systems) |
| Consultant or advisor | Low — if rarely on-site | Yes — core exposure |
| Designer or creative | Basic cover advisable | Yes — errors and IP risks |
| IT contractor or developer | Basic cover advisable | Yes — system errors |
| Retailer with a premises | Yes — customer injuries | Usually not required |
| Event organiser | Yes — public attendance | Sometimes |
Many client contracts specify minimum limits for both. Always check your client's standard terms before pricing a job — the insurance requirement may dictate the minimum cover level. For further detail on what professional indemnity covers, see the glossary entry. For limit selection, see liability limit.
When you need both
Many businesses need both covers because their work involves both physical presence and professional advice. A surveyor visits properties (PL exposure) and produces reports that clients rely on (PI exposure). A trainer visits client premises (PL) and gives advice that influences decisions (PI). The premium for both is usually less than people expect — basic PL at £2m limit and PI at £1m limit can often be bundled for a few hundred pounds per year for a sole trader.
PL vs PI FAQ
Frequently asked questions
- If clients never visit your premises and you never visit theirs, your direct exposure to public liability claims is limited — but not zero. If you use couriers, employ contractors, or attend events in a professional capacity, there is still potential exposure. Many home-based freelancers hold a basic PL policy (limits from £1m–£2m) for a low premium as a precaution. Professional indemnity is more likely to be the essential cover for home-based knowledge workers. See our article on business liability for more.
- Professional indemnity is typically written on a "claims made" basis — the policy active when the claim is made (not when the work was done) is the one that responds. This means you need continuous cover even after leaving a client engagement, because claims can arrive years after the work was completed. When cancelling PI cover, consider a "run-off" period — commonly 6 years — to protect against late claims from past work.
- Many client contracts specify a minimum PI limit — commonly £1m or £2m per claim. Check your contracts first. If your work has the potential to cause significant financial loss to a client (software errors, design mistakes, advice failures), the limit should reflect the scale of that exposure. A £1m limit on a project where an error could cost the client £5m leaves you exposed. See liability limit for how insured limits work.
- Yes. Employers' liability (EL) is a third, separate cover that protects against claims from your own employees who are injured or made ill through their work. It is legally required in the UK if you have employees (including some contractors). PL covers third-party members of the public; PI covers professional errors; EL covers your workforce. A business with staff typically needs all three. See our article on business liability explained.