The certificate that gets you on site.
£1m to £10m of public liability, employers' liability where you have staff, and tools and plant cover — matched to what your contracts actually demand.
Public liability insurance covers claims from third parties for injury or property damage arising from your business activities. It is not a UK legal requirement, but employers' liability insurance is compulsory at a £5m minimum for almost every business with employees, and public liability is contractually mandatory on most sites: £1m–£2m for domestic work, £5m for main contractors and commercial clients, and £10m for local authority, housing association, rail and utilities contracts. Typical annual cost is £60–£180 for £2m as a sole trader, £120–£300 for £5m, and £350–£900 for higher-risk trades such as roofing, scaffolding and groundworks. Professional indemnity is separate and covers financial loss from advice or design. For self-employed and CIS mortgage applicants, live liability certificates are frequently requested as evidence that trading income can continue.
The numbers, at a glance.
What lenders want to see.
Who typically qualifies
- Sole traders, CIS subcontractors and day-rate contractors
- Limited company contractors and small trade businesses
- Higher-risk trades — roofing, scaffolding, groundworks, hot works
- Consultants and IT contractors needing PL plus professional indemnity
- Businesses with employees or labour-only subcontractors (EL required)
Documents to prepare
- Trade or SIC description and split of activities
- Annual turnover and wage roll, including labour-only subcontractors
- Highest limit required by current contracts
- Claims history for the last 5 years
- Details of any work at height, hot works or heavy plant
How Elena helps, specifically.
£10m where needed
Limits matched to local authority, housing association and rail contracts.
High-risk trades placed
Roofing, scaffolding and groundworks accepted, not auto-declined.
EL compliance
Employers' liability at the £5m statutory minimum wherever you have staff.
Tools and plant
Own and hired-in plant added so a theft doesn't stop the job.
Certificate same day
Documents issued immediately so you can be inducted on site.
Mortgage-ready
Elena bundles your certificates with income evidence for lenders.
Top liability packages for this profile
"Meets most main-contractor requirements at the lowest sensible limit."
"Local authority and housing association ready, with staff covered."
"Covers both third-party injury and financial loss from advice or design."
The detail lenders won't tell you.
Which limit your contracts actually require
Limit of indemnity is dictated by clients, not risk appetite. Domestic customers rarely specify a figure, so £1m–£2m is usually adequate. Main contractors and commercial developers standardise on £5m. Public-sector frameworks — councils, housing associations, NHS trusts, Network Rail, utilities — almost always specify £10m, and the requirement applies from the induction, not from first invoice. Read the specification before quoting: retrospectively raising a limit mid-contract costs more than starting at the right level.
Employers' liability is the compulsory one
The Employers' Liability (Compulsory Insurance) Act 1969 requires most UK employers to hold at least £5m of employers' liability cover and to make the certificate available to employees. Labour-only subcontractors usually count as employees for this purpose, which catches many small builders who believe they have no staff. Penalties can reach £2,500 for each day without cover.
Why liability cover matters to a mortgage underwriter
Specialist lenders underwriting CIS, day-rate and self-employed income are testing whether that income can continue. Current public and employers' liability certificates, alongside a signed contract or framework agreement, demonstrate you are legally able to remain on site. Several contractor-friendly lenders request them within the standard document pack, and a lapse can stall an offer at underwriting.
Gaps that catch trades out
Four recur consistently. Hot works — welding, torch-on roofing, hot bitumen — is often excluded unless declared and worked to a permit. Work at height above a stated metre limit can be excluded outright. Damage to the part of the structure you are working on may sit outside PL and need contract works cover. Hired-in plant is not automatically insured, and hire agreements typically make you liable for its full replacement value.
Public liability vs employers' liability vs professional indemnity
| Criterion | High-street lender | Specialist / AI-matched |
|---|---|---|
| Legally required | No | EL yes, £5m minimum |
| Covers | Third-party injury and property damage | Employee injury / financial loss from advice |
| Typical limit | £1m–£10m | £10m EL, £1m–£5m PI |
| Required by contractors | Almost always £5m+ | EL where staff, PI where design |
| Sole-trader cost | £60–£300/yr | £150–£400/yr each |
| Requested by mortgage lenders | Often, for CIS and day-rate | Often, alongside contracts |
Real scenarios, real numbers.
Where these numbers come from.
- Employers' Liability (Compulsory Insurance) Act 1969 — £5m statutory minimum and certificate display duty.
- HSE — employers' liability insurance guidance — Who counts as an employee, including labour-only subcontractors.
- FCA ICOBS — Disclosure and suitability requirements for commercial insurance.
Rates, criteria and schemes cited are indicative of the UK market at time of publication and change frequently. Elena verifies live rates against 90+ lender panels before every application.
Questions, answered.
Elena, our AI mortgage expert, can answer it in seconds — or book you a free callback with a human broker.
Is public liability insurance a legal requirement in the UK?
How much does public liability insurance cost?
How much public liability cover do contractors need?
Does public liability insurance affect my mortgage application?
What is the difference between public and professional indemnity insurance?
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