Public liability and professional indemnity insurance answer two different questions in the UK. One responds when your business injures someone or damages their property. The other responds when your advice or professional work causes a client a financial loss. This guide shows how regulators and councils set the figures for each, compares them side by side, and explains where combined policies and grey areas fit. We do not recommend any product.
Quick answer
Public liability insurance covers injury and property damage claims from third parties. Professional indemnity covers claims about advice or professional work. Some regulators require professional indemnity, such as the SRA for solicitors, while public liability is voluntary in law.
Public Liability and Professional Indemnity Insurance at a Glance
| Question | Short answer |
|---|---|
| What does public liability respond to? | Claims by people you do not employ for injury or damage |
| What does professional indemnity respond to? | Claims about advice or professional work, such as those the SRA rules address |
| Which is required by law? | Neither across the board, but some regulators require professional indemnity |
| Who sets professional indemnity minimums? | The profession's regulator |
| Who sets public liability limits? | The client, council or licence |
| Are combined policies sold? | Yes, an insurer page lists a combined example for teachers |
| Which policy covers staff injuries? | Neither, employers' liability does |
Public Liability and Professional Indemnity: Two Policies, Two Questions
The simplest test is to ask what kind of harm the claimant says they suffered. If the answer is a physical injury or damage to property, public liability is the policy that is designed for it. If the answer is a financial loss caused by advice, design, or a professional service, professional indemnity is the policy that is designed for it. Employers' liability is a third policy for staff.
HSE Northern Ireland describes public liability as voluntary, covering liability to people you do not employ. For professional indemnity, the position depends on the profession. The Solicitors Regulation Authority requires its firms to hold it, and sets minimum terms. The so what: you can hold neither, one or both without breaking the law, depending on your work. Our hub guide shows the three policies side by side.
Which Policy Responds? A Sorting Table
Use the table as a sorting aid and not as a promise of cover. The wording of your policy decides what is paid.
| Claim | Harm | Policy designed for it |
|---|---|---|
| A visitor slips on a wet floor in your office | Injury | Public liability |
| A courier is injured by a falling shelf at your premises | Injury | Public liability |
| Your employee cuts a hand on a machine | Injury to staff | Employers' liability |
| A client says your report contained an error that cost money | Financial loss | Professional indemnity |
| A client says your design caused later damage to their building | Possibly both | Read both wordings |
The last row is the honest one. A claim can involve both an act of professional judgement and physical damage. We cannot say how an insurer would treat it, because that depends on both policies and on the facts. The so what: if your work could produce both kinds of claim, ask each insurer, in writing, which policy would respond to a described scenario.
What Regulators Require for Professional Indemnity
Regulators set professional indemnity minimums for their own members. The examples we opened show how different the rules look.
| Regulator | What we found | Page date |
|---|---|---|
| Solicitors Regulation Authority | At least £3 million for some bodies and at least £2 million in other cases, with no monetary limit on defence costs | Metadata shows 2025 dates, and the rule applies to indemnity periods from 25 November 2019 |
| Architects Registration Board | A Board paper expects a minimum of £250,000 per claim, as draft guidance | Board meeting of 9 February 2022 |
| ICAEW | New PII regulations took effect on 1 September 2024 | No page date shown |
Treat the ARB row with care. The page we opened is a 2022 Board paper that sets out draft guidance for consultation, so it is both old and a draft. Check ARB's current guidance before you rely on the figure. The SRA row is the clearest, because its terms say the sum insured excludes defence costs and that there must be no monetary limit on defence costs.
The ICAEW page confirms that a change date exists but did not show us the limits, so we say nothing more about them. The pattern is the point: each regulator sets its own figure, and a regulator's number applies only to its members. Our requirements guide covers the public liability side.
Regulator Minimums Beside Council Limits
Public liability limits come from contracts, and professional indemnity minimums come from regulators. Putting them in one table shows how different the scale can be. The ratios are our arithmetic.
| Requirement | Figure | Who set it | Ratio to £3 million |
|---|---|---|---|
| Professional indemnity, SRA, higher category | £3 million | Regulator | 1.0 |
| Public liability, Sandwell events | £5 million per claim | Council | About 1.7 |
| Public liability, East Sussex standard | £10 million for each claim | Council | About 3.3 |
| Professional indemnity, ARB draft expectation | £250,000 per claim | Regulator (draft) | About 0.08 |
The ratios are simple divisions: £5 million over £3 million is about 1.7, £10 million over £3 million is about 3.3, and £250,000 over £3 million is about 0.08. They do not show that one policy is more important than another. They show that a firm can face a £10 million client requirement for public liability while its regulator asks for £3 million for professional indemnity. The so what: read each figure against the document that sets it.
Combined Public Liability and Professional Indemnity Policies and Gaps
Some insurers sell public liability and professional indemnity as a package. The Markel page we opened lists a combined public liability and professional indemnity example for teachers, with a price that we do not repeat. It is a commercial page from 8 June 2024, so it is over two years old, and it shows only that combined products exist.
Picture a freelance trainer who delivers workshops at clients' offices. A delegate trips on a lead, and another says the materials contained a mistake that cost their team a day's work. The first claim is the kind of thing public liability insurance is designed for, and the second is professional indemnity territory. A combined policy may answer both, but the limits, excesses and exclusions can differ between the two sections. Ask for them separately.
Three Invented Trades, Two Policies
These sketches are invented to show the reasoning. They are not real people, and the figures come only from the sources above.
| Trade | Likely public liability trigger | Likely professional indemnity trigger | Who might ask for proof |
|---|---|---|---|
| Graphic designer working from home | Rare, unless clients visit | A client says a design error cost money | Larger clients, in their contracts |
| Plumber working in customers' homes | Damage or injury on site | Advice on a repair that proves wrong | Customers, letting agents, schemes |
| Solicitor in a small firm | A client trips in reception | Advice that costs a client money | The regulator, for professional indemnity |
The table is a reasoning aid. The solicitor row is the only one where a source we opened sets a rule, because the SRA sets minimum terms. For the designer and the plumber, the rule comes from the contract. The so what: ask who is asking, because a regulator, a council and a private client each ask for different things in different words.
A Worksheet to Compare the Two Sections
When you hold two sections, or two policies, put them in one grid so differences stand out. The columns below are ones both policies should answer, and the entries are yours to fill from the wording.
| Question | Public liability section | Professional indemnity section |
|---|---|---|
| What is the limit? | ||
| Does it apply to each claim or the whole year? | ||
| Are defence costs inside or outside the limit? | ||
| What is the excess? | ||
| What dates does it cover? | ||
| Which exclusions touch my work? |
An empty cell is a question for the seller. The worksheet is ours and not an insurer's form, and it works for any two quotes. Keep it with your requirement tracker from the requirements guide.
Questions to Ask Before You Buy Either
- Which claims does the policy describe, and in what words?
- Is the limit for each claim, or for the whole policy period?
- Are defence costs inside the limit, outside it, or capped?
- Does the policy cover the work I do now, not only the work I did when I started?
- If I stop trading, what happens to claims that arrive later?
Question five matters for professional work, where claims can arrive long after the job ends. The SRA's terms refer to indemnity periods, which is a reminder that the dates on a professional indemnity policy matter. For public liability, the dates matter too, because a council or licence may require cover for the whole period.
Checking the Seller and Making a Complaint
Both policies are sold by regulated firms, so the checks are the same. Search the exact firm name on the FCA Financial Services Register, a public record last updated on 13 February 2026. If you have a complaint about the firm, contact it first. The FCA says to go to the Financial Ombudsman Service within 6 months of the final response, and the Ombudsman publishes size tests for micro-enterprises and small businesses on its eligibility page.
The so what: size matters. A micro-enterprise has fewer than 10 employees and a turnover or balance sheet not above €2 million, and a small business must have turnover under £6.5 million plus either a balance sheet under £5 million or fewer than 50 employees. A professional firm that has grown past those limits may need to take a dispute to court instead, so check the page before you assume the Ombudsman will take the case.
What Is Moving Into 2027
| Item | What we found | Why it matters |
|---|---|---|
| Product liability law | A Law Commission consultation runs until 14 January 2027, covering software and AI as products | If your work includes software, the boundary with professional indemnity may be tested |
| Market rates | Marsh reported UK rates down 8% in Q3 2026 across lines | The release gives no figure for professional indemnity |
Where to Go Next on Cairn Cover
The one thing to remember about public liability and professional indemnity insurance: match the policy to the kind of harm, and match the limit to the document that asks for it. Cairn Cover is a free guide and does not sell insurance or quote prices. Read the what is it guide for the public liability definition, and the cost guide for what moves a premium.
Frequently Asked Questions
What is the difference between public liability and professional indemnity insurance? Public liability responds to injury or damage claims from people you do not employ. Professional indemnity responds to claims about advice or professional work. Employers' liability covers staff, so there are three separate policies.
Is professional indemnity insurance compulsory in the UK? For some professions, yes. The SRA rules set minimum cover for solicitors' firms. There is no single rule for every business, so check your regulator.
Is public liability insurance compulsory? We found no gov.uk page that makes it compulsory, and HSE Northern Ireland calls it voluntary. Clients, councils and licences may still require it.
Can one policy cover both? Some insurers sell combined products. The limits, excesses and exclusions for each section may differ, so compare them section by section.
Do I need both as a consultant? It depends on who asks and what you do. Consultants who visit client premises may be asked for public liability, and those who give advice may be asked for professional indemnity. Check your contracts.
Do defence costs count inside the limit? It depends on the wording. The SRA minimum terms say there must be no monetary limit on defence costs, but that rule applies to the policies it governs.
Does the Insurance Act 2015 apply? Part 2 applies to non-consumer insurance contracts, so the duty of fair presentation applies to both policies when a business buys them.
How does Cairn Cover help? We read regulator and government pages, date them, and link them on the words they support. We do not sell insurance, quote prices or rank providers.