Public Liability Insurance in the UK: A Plain-English Guide for Trades and Small Businesses

Reviewed by Matthew Bartlett, Director, Apex Insurance Brokers Limited · Last reviewed 2026-08-06

If you run a trade or a small business in the UK — whether you are on the tools, on site, in a unit or visiting customers — public liability is almost certainly the first commercial policy anyone will ask you about. It is also the one most people buy without quite understanding what it does. This page sets out, in plain English, what the cover actually is, where the law does and does not come into it, and how to make sure the limit you buy is the limit your contracts actually require.

What does public liability insurance actually pay for?

Public liability (PL) responds when a third party — anyone who is not you or your employee — holds your business legally responsible for injury to them or damage to their property, arising from your business activities. Two things matter in that sentence. First, it is liability cover: the injured party has to have a legal claim against you, usually in negligence. It is not a goodwill fund for every mishap near your van. Second, it covers third parties: customers, members of the public, other contractors on a site, the owner of the building you are working in.

A typical policy pays the compensation you become legally liable for, plus the legal costs of defending the claim — and defence costs are often the part people underestimate. A disputed injury claim can generate solicitor and expert fees long before anyone decides who was at fault. A decent PL policy picks those up and, just as importantly, puts the insurer’s claims team between you and the claimant’s solicitors.

The claim patterns are familiar to any broker who handles trades: a ladder or scaffold tube through a conservatory roof; a trailing extension lead that a customer trips over; a burst pipe after a plumbing first fix that soaks the flat below; paint overspray across a row of parked cars; a delivery pallet clipping a shopper; a hot-works job that scorches far more than the workpiece. None of these need recklessness — they need one ordinary lapse on an ordinary day, in front of the wrong person’s property.

Is public liability insurance a legal requirement in the UK?

No — and it is worth being precise about this, because it gets blurred constantly. There is no UK statute that compels a business to carry public liability insurance. The two well-known compulsory covers are different animals: employers’ liability, which the Employers’ Liability (Compulsory Insurance) Act 1969 requires once you have employees, and motor insurance, which the Road Traffic Act 1988 requires for vehicles used on the road.

So why does everyone treat PL as if it were mandatory? Because in practice it is a condition of doing business rather than a condition of the law. Main contractors will not let you on site without evidence of PL at a stated limit. Local authorities require it before granting market pitches, street works permits and event licences. Commercial landlords write it into leases. Housing associations, schools, utilities and facilities managers all ask for the certificate before you are approved as a supplier. Many trade association memberships and client framework agreements build it in as a standing requirement. Turn up without it and the work simply goes to someone who has it.

There is also the blunt commercial reality: without insurance, a single genuine injury claim — with damages and both sides’ legal costs — lands on the business, and for a sole trader that means personal assets. “Not legally required” and “optional” are not the same thing.

How is public liability different from employers’ liability?

This is the distinction that trips up more small businesses than any other, so let us keep it sharp. Public liability covers claims from third parties — the public, clients, other trades — and no law obliges you to buy it. Employers’ liability (EL) covers claims from your own workers who are injured or made ill through their work, and it is a legal requirement under the Employers’ Liability (Compulsory Insurance) Act 1969 for the vast majority of employers, with penalties for trading without it.

The trap for trades is the word “employee”. For EL purposes it can stretch well beyond people on your PAYE payroll. Labour-only subcontractors — people who work under your direction, using your materials and equipment, paid for their labour — are generally treated as employees, which means you likely need EL in place for them even if you think of yourself as a one-man band who “just gets a mate in” on bigger jobs. Genuinely independent bona fide subcontractors, working to their own methods with their own insurance, usually sit on the PL side instead — but you should expect to be asked to check they carry their own cover. If you use subbies of either kind, tell your broker exactly how they work; it changes which policy responds and whether you are legally compliant.

Most insurers package PL and EL together for trades, which is convenient — but the two covers answer different questions, and a form that asks “do you have any employees?” deserves a careful answer, not a quick one.

How do the limits work — and is £1m enough?

PL policies carry a limit of indemnity: the most the insurer will pay for a claim (policies differ on whether that is per claim or in aggregate per year, and on how defence costs sit against the limit — ask, because it matters). In the UK market you will most commonly see limits of £1m, £2m and £5m offered, with £10m available where contracts demand it. Treat those figures as illustrative options, not recommendations — the right limit is the one your work and your contracts actually justify.

Two questions decide it. First, what could realistically go wrong? Serious injury claims — a head injury, a claimant who cannot return to work — can produce awards and costs that make a £1m limit look thin, particularly once care costs and loss of earnings are calculated over decades. Damage claims scale with what you work near: a domestic decorator and a contractor working alongside mainline rail infrastructure are not carrying the same exposure. Second, what do your contracts require? This is the practical driver for most trades. Principal contractors commonly specify a minimum PL limit as a condition of appointment; local authorities and utilities frequently require £5m or £10m for works on or near the highway. If you quote for work requiring £5m while holding £2m, you either upgrade mid-term or lose the job — and mid-term upgrades are rarely the cheapest way to buy cover.

Our honest steer: buy for the worst credible claim and the best contract you hope to win, not for last year’s work.

Larger or more complex risk? Speak directly to a director — call 0117 325 0027 or email info@apexinsurancebrokers.co.uk.

What does public liability insurance not cover?

Knowing the edges of the cover is how you avoid the two worst conversations in insurance: the declined claim and the uninsured gap. The common exclusions and boundaries worth understanding are:

• Injury to your own employees — that is employers’ liability, compulsory under the 1969 Act, never PL.
• Defective workmanship on the job itself — PL typically covers the damage your faulty work causes to other property, not the cost of redoing the work. The bathroom you have to re-tile is on you; the ceiling below that your leak destroyed is where PL comes in.
• Professional advice and design — if a client loses money because your design, specification or advice was wrong, that is professional indemnity territory, not PL.
• Property in your custody or control — many policies restrict or exclude damage to property you are working on or looking after; check how yours treats it, especially if you take customers’ goods away.
• Your own tools, plant and vehicles — PL is liability cover, not property cover; tools and motor risks are separate policies (and road use is compulsorily insured under the Road Traffic Act 1988).
• Excluded activities and conditions — height limits, depth limits, heat-works conditions and application-of-heat warranties are common in trade policies. Breach them and you may find you were not covered on the very job that went wrong.

That last point deserves emphasis. If your policy assumes you work below a certain height and you take a job re-pointing a chimney, or your hot-works condition requires a fire watch after finishing and nobody stayed, the exclusion does not care how good the rest of your paperwork is. Read the conditions, or use a broker who reads them for you.

Who will actually ask to see my certificate?

More people than you might expect, and usually at the worst possible moment — the day before you are due to start. Principal contractors ask at pre-qualification and again at site induction. Local authorities ask before issuing permits, licences and market pitches. Landlords and managing agents ask before granting access to communal areas and commercial units. Event organisers ask before you set up a stand. Larger clients increasingly run supplier onboarding portals that will not release a purchase order until a current certificate, with the required limit and dates, is uploaded. Keep a PDF of your schedule and certificate to hand, know your renewal date, and make sure the business name on the policy exactly matches the name you trade under — mismatched names cause more onboarding delays than premiums do. If you arrange your cover through Apex, documentation the same day is the norm, not the exception.

What affects the price of public liability cover?

We will not quote figures here, because any number printed on a page is wrong for most readers — premiums move with the risk. What genuinely drives PL pricing is: your trade and the hazard attached to it (heat, height, depth, and anything airside, railside or waterside all move the dial); your turnover and headcount, as a proxy for how much activity is out there generating exposure; where and for whom you work, since domestic-only work is rated differently from commercial and industrial sites; the limit of indemnity you choose; your claims history; and the excess you are prepared to carry. The way to buy well is not to shave the limit — it is to describe your work accurately so you are rated for what you actually do, and to let a broker test the market rather than renewing on autopilot. Under-describing your activities to save premium is a false economy that surfaces exactly once: at claim time.

How do I make sure a claim actually gets paid?

Three habits do most of the work. First, disclose properly: your trade description, activities, subcontractor use and any unusual work (heights, heat, hazardous locations) should be accurate at the start and updated if your work changes mid-year — new contract in a new environment, phone your broker. Second, keep the conditions: hot-works precautions, ladder and access requirements, and any warranties in the wording are part of the deal, not small print to skim. Third, report early and say little: notify your insurer or broker as soon as an incident happens, take photos, get witness details, and do not admit liability or negotiate directly with the claimant — that is precisely the job you have paid the insurer to do. Businesses that follow those three habits have a very different claims experience from those that do not.

Why arrange it through a broker rather than buy direct?

You can buy PL online in minutes, and for the simplest risks that can be fine. Where it goes wrong is at the edges: the labour-only subbie who should have triggered EL, the height limit nobody noticed, the contract requiring £5m against a £2m policy, the trade description that does not quite cover the second thing you do. A broker’s job is to catch those before they cost you — to match the wording to the work, evidence the cover to your clients quickly, and stand in your corner when a claim comes in. Apex Insurance Brokers is an independent, FCA-authorised broker based in Bristol, arranging cover for trades and SMEs across the UK, and public liability is bread-and-butter work for us: tell us what you do, and we will tell you what you actually need — including when the honest answer is that you need less than you feared.

Apex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority (FRN 724952). This article is general information, not advice on a specific policy.