What public liability insurance covers
Public liability insurance covers your business if a member of the public — a customer, client, supplier or passer-by — is injured, or their property damaged, because of your business activities. It pays compensation awards and, crucially, the legal costs of defending claims, which can be substantial even when a claim fails.
Typical claims are mundane rather than dramatic: a customer trips over a cable at your premises, a ladder scratches a client's car, a spilled drink ruins a laptop. What makes the cover essential is the tail risk — a serious injury claim can run into six or seven figures.
Who needs it?
Any business that interacts with the public or works on other people's property: trades and contractors, shops, cafés and salons, market traders, event businesses, mobile services, offices that receive visitors. It isn't a legal requirement, but it functions like one in practice — many clients, sites, councils and venues won't let you work without proof of cover, commonly at £5m.
Home-based businesses with no visitors and no off-site work are the main group who can sometimes go without.
How much cover do you need?
Policies commonly offer £1m, £2m, £5m or £10m limits. The right level is set less by your preference than by your contracts: local authorities and larger clients typically require £5m, and some sites £10m. Below that, weigh the worst realistic injury claim in your line of work — the difference in premium between £1m and £5m is usually modest compared with the extra protection.
What it doesn't cover
Public liability doesn't cover injuries to your own staff (that's employers' liability, which is legally required if you employ anyone), claims that your advice caused financial loss (professional indemnity), damage to your own property or tools, or faulty products causing harm after sale (product liability — often bundled with public liability). Knowing the boundaries stops you assuming you're covered when you're not.
What does it cost?
Premiums depend on your trade's risk, turnover, staff numbers and cover limit — a low-risk consultant pays far less than a roofer. For many small businesses, cover is one of the cheaper policies they buy, and bundling it with contents and other cover in a combined policy usually beats buying alone. Higher excesses trim premiums if you can carry small claims yourself.
Staying claim-proof
Two habits protect you beyond the policy: keep evidence (risk assessments, maintenance logs, signage, photos of completed work), and notify your insurer promptly when anything happens that could become a claim — late notification is a common reason payouts get disputed. Accurate turnover and activity descriptions at renewal matter for the same reason.
Getting the right policy
A specialist broker will match the limit to your contracts, check the policy wording suits your trade, and bundle it efficiently with the rest of your cover — see our best public liability options, or find a business insurance specialist through Nesto — free, no obligation.