Public Liability Insurance Guide

Quick Answer: Public liability (PL) insurance covers your legal liability if your work injures a member of the public or damages their property — a customer tripping over your cable, a dropped tool through a window, a flood from a botched joint. It is not a legal requirement for most tradespeople, but it is effectively essential: most commercial clients, main contractors and many domestic customers will not let you on site without it. Typical cover levels are £1m, £2m or £5m, with £2m being the common domestic minimum and £5m+ often demanded for commercial or public-sector work. Employer's liability insurance, by contrast, is a legal requirement if you have any staff.

Summary

Public liability is the insurance tradespeople are most likely to actually claim on, because it covers the everyday way a job goes wrong: not your tools being stolen, not your van crashing, but you or your work causing harm to someone else or their property. The customer who trips over your trailing lead and breaks a wrist. The angle grinder spark that sets a curtain alight. The compression fitting that lets go overnight and brings down a ceiling. PL exists to pay the third party's claim — their injury, their damage, their losses — and the legal costs of defending you, so a single bad day does not end the business.

The crucial thing to be clear about is what PL is and is not. It covers your liability to other people — members of the public, customers, anyone who is not you or your employee. It does not cover your own injuries, your own tools, or, importantly, the cost of redoing your own defective work. And it is generally distinct from professional indemnity insurance, which covers claims arising from advice, design or specification you got wrong — relevant for trades that design as well as build.

PL is mostly not a legal requirement, which surprises people. The legal requirement is employer's liability insurance, which you must have (with very limited exceptions) the moment you employ anyone. But the absence of a legal duty to hold PL is academic: the market enforces it. Commercial sites, main contractors, letting agents, local authorities and a growing number of cautious domestic customers simply will not engage a tradesperson without seeing a current PL certificate, usually for a minimum sum they specify.

Key Facts

• PL covers your liability to third parties — injury to members of the public/customers, or damage to their property, caused by you or your work.
• PL is not a legal requirement for most tradespeople — but it is commercially essential; most clients and contractors mandate it.
• Employer's liability (EL) IS a legal requirement — if you employ anyone (with narrow exceptions), you must hold EL cover, and a minimum of £5m is the standard (most policies provide £10m). Failure to hold it carries a daily fine.
• Common cover levels — £1m, £2m, £5m and £10m; £2m is a typical domestic minimum, £5m+ is frequently required for commercial, public-sector and main-contractor work.
• Legal defence costs are normally covered in addition to, or within, the limit — check which.
• PL does NOT cover your own injuries, your own tools/plant, your own employees (that's EL), or the cost of putting right your own faulty workmanship.
• Professional indemnity (PI) is separate — it covers claims from negligent advice, design or specification; needed by trades that design or certify, not just install.
• Contract works ("all risks") insurance is also separate — it covers the project itself (materials and work in progress) against fire, theft, flood and storm before handover.
• Self-employed subcontractors are usually expected to carry their own PL — a main contractor's policy rarely extends to a subcontractor's own negligence.
• Disclosure matters — trade type, work undertaken, use of subcontractors, height/depth of work and turnover all affect cover and premium and must be declared accurately.
• Claims can arise after the job — PL policies typically respond on a "claims occurring" basis, but check, and keep run-off in mind when you stop trading.

Quick Reference Table

Detailed Guidance

What PL actually pays for

When a third party suffers injury or property damage and alleges it was your fault, PL insurance responds in two ways: it pays compensation/damages if you are found liable, and it covers the legal costs of investigating and defending the claim — which can be substantial even on a claim that ultimately fails. Typical trade scenarios:

• A customer or passer-by is injured — trips on a lead, walks into scaffold, is struck by falling material.
• A customer's property is damaged — a dropped tool through a window, an escape of water from a pipe you worked on, a fire from hot works, dust or impact damage.
• A neighbouring property is affected — water, fire or structural damage spreading next door.

The policy limit is the maximum it will pay per claim (or sometimes in aggregate — check). A serious injury claim, especially with long-term care or loss of earnings, can run well into six or seven figures, which is why £2m is now the practical floor and higher limits are routine.

What PL does NOT cover — the common misunderstandings

PL is narrower than people assume:

• Your own faulty workmanship. PL covers the consequences of your work injuring someone or damaging their other property — it does not pay to rip out and redo the defective work itself. The leaking joint's water damage to the ceiling may be covered; re-doing the joint is not.
• Your own injuries. If you are hurt, PL does nothing — that is personal accident / income protection cover.
• Your employees' injuries. Claims from staff are employer's liability, not PL.
• Your own tools, plant and van. Separate covers.
• The project itself. Materials and work-in-progress damaged by fire, theft or flood before handover is contract works insurance.
• Negligent advice or design. That is professional indemnity.

Knowing the boundaries stops you assuming you are covered for things you are not — and stops you under-insuring the things you actually need.

How much cover, and who decides

For purely domestic work, £2m is the common baseline and many insurers offer it as standard. The level is usually driven not by you but by whoever you want to work for:

• Main contractors and commercial sites routinely require £5m and increasingly £10m, and will ask for the certificate before you set foot on site.
• Local authorities, housing associations and public-sector frameworks frequently specify £5m or £10m.
• Letting and managing agents often want to see a current certificate before instructing you.

Check tender and contract documents for the required limit and confirm your policy meets it — being £1m short of a contractual requirement can cost you the job or, worse, leave you exposed mid-contract. See public liability for the typical minimums by sector and commercial jobs for what commercial clients expect.

Subcontractors, employees and the EL line

Two structural points trades get wrong:

1. If you employ anyone, you must by law have employer's liability insurance — at least £5m, and the certificate must be available to staff. This is a hard legal requirement with a daily fine for non-compliance, unlike PL. Even a single part-time labourer triggers it (genuine family-business and some specific exceptions aside).
2. Bona fide subcontractors usually need their own PL. A main contractor's policy generally does not pick up a subcontractor's own negligence, and the contractor will normally require each subcontractor to hold their own cover. If you take on subcontractors, your policy must be told — how you use them affects your cover — and you should be checking their certificates too.

Declaring your work accurately

PL is priced on what you actually do. The things that materially change the risk — and that must be declared accurately — include your trade and the specific operations you undertake (hot works, work at height, work below ground, work on or near water, electrical, gas), your turnover, whether you use subcontractors, and whether you do any design or specification work. Under-describing the work to get a cheaper premium is the classic own goal: the policy looks valid until you claim for exactly the activity you did not declare.

Frequently Asked Questions

Is public liability insurance a legal requirement for tradespeople?

For most tradespeople, no — public liability is not legally compulsory. The insurance that is legally required is employer's liability, which you must hold (subject to narrow exceptions) as soon as you employ anyone. However, the lack of a legal duty for PL is academic: commercial clients, main contractors, local authorities, letting agents and many domestic customers will not engage you without seeing a current PL certificate. In practice, working without it means turning down most of the available work.

How much public liability cover do I need?

£2m is the common minimum for domestic work, but the level you actually need is usually dictated by your clients. Main contractors and commercial sites frequently require £5m; public-sector and larger commercial frameworks often require £10m. Check the contract or tender documents — they will specify a minimum, and your policy must meet it. If your work involves higher-risk activities or you want access to commercial work, default to £5m rather than the bare £2m.

Does public liability cover me if I do the job badly?

Not the way most people hope. PL covers your liability for injury to third parties and damage to their other property — but it does not pay to rip out and redo your own defective workmanship. If a joint you fitted fails and floods a ceiling, the water damage to the customer's ceiling and contents may be covered; the cost of re-doing the joint itself is not. For claims arising from negligent advice or design rather than physical work, you need professional indemnity insurance, which is separate again.

I'm a self-employed subcontractor — am I covered by the main contractor's insurance?

Generally not for your own negligence. A main contractor's public liability policy is there for the contractor's own liability; it rarely extends to cover a subcontractor's own negligent acts, and the contractor will normally require each subcontractor to hold their own PL cover as a condition of being on site. As a self-employed subcontractor you should carry your own policy, at the limit the contract specifies, and expect to produce the certificate before starting.

Regulations & Standards

• Employers' Liability (Compulsory Insurance) Act 1969 — makes employer's liability insurance a legal requirement for employers.

• Employers' Liability (Compulsory Insurance) Regulations 1998 — sets the minimum cover and certificate requirements.

• Health and Safety at Work etc. Act 1974 — the underlying duty of care that liability claims are often built on.

• Occupiers' Liability Acts 1957 and 1984 — relevant to liability for the safety of people on premises where you work.

• Consumer Insurance (Disclosure and Representations) Act 2012 / Insurance Act 2015 — the duties of disclosure when arranging insurance.

• Financial Conduct Authority (FCA) — regulates the insurers and brokers providing these covers.

• HSE — Employers' liability insurance — the legal requirement for EL cover

• GOV.UK — Insurance for your business — overview of business insurance obligations

• Financial Conduct Authority — Insurance — consumer guidance on insurance

• British Insurance Brokers' Association (BIBA) — finding a broker and understanding commercial cover

• public liability — typical minimum limits by sector and common policy exclusions

• insurance — the full set of insurances a tradesperson needs and typical costs

• professional indemnity — cover for claims arising from negligent advice, design or specification

• commercial jobs — what commercial clients and main contractors require before you start