What Is a Certificate of Insurance and Why Do Tradesmen Need One?
A certificate of insurance is a one-page document from your insurer confirming that a policy is live, who it covers, for how much and until when. Tradesmen deal with two very different ones: a statutory employers’ liability certificate and a commercial certificate a client asks to see.
Those two documents look similar and behave nothing alike. One is required by an Act of Parliament and carries a fine if you cannot produce it.
The other has no legal form at all. It exists because a main contractor will not let you through the gate without it.
Getting the difference straight saves arguments on site and stops you sending the wrong PDF. It also tells you what to ask your tradesman insurance provider for at renewal.
Keep two documents straight: your employers’ liability certificate is a legal requirement with a fine attached if you can’t display it, while a commercial certificate a client asks for has no legal status at all, only a gatekeeping one. Know how long you’re required to keep old certificates so an old claim can still be traced back to the cover that was live at the time. If a certificate gets rejected, check the dates and the named insured before you assume it’s fake.
Check your tradesman insurance options and keep a certificate ready for every site.
- What does a certificate of insurance actually prove?
- How does the employers' liability certificate differ from a public liability one?
- What must an employers' liability certificate state?
- Where do you have to display it, and what if you do not?
- How long do you have to keep old certificates?
- Why do clients and main contractors ask for a certificate?
- How does a client verify that a certificate is genuine?
- Why do certificates get rejected, and how do you fix it?
- Frequently asked questions (FAQs)
What does a certificate of insurance actually prove?
It proves a named policy existed on a named date, for a stated limit, in the name of a stated business. It does not tell anyone what the policy excludes.
What appears on the document
The insured name, the insurer, the policy number, the type of cover, the limit of indemnity and the period of insurance. Some also carry the trade description and the renewal date.
Certificates do carry a policy number, despite a persistent myth that public liability certificates leave it off. Without one there would be nothing for a client to quote when they ring the insurer.
Certificate, schedule or wording
The certificate is the proof, the schedule is the personalised detail including endorsements and excesses, and the wording is the full contract. Clients almost always want the certificate and occasionally the schedule.
Never send the wording to a client who asked for proof of cover. Send the schedule only when a compliance team specifically asks to see endorsements, which is common on construction work.
How does the employers’ liability certificate differ from a public liability one?
The employers’ liability certificate is a statutory document with legally prescribed content and a duty to display it. The public liability certificate is a commercial courtesy with no prescribed form at all.
One is law, one is contract
The Employers’ Liability (Compulsory Insurance) Act 1969 creates the duty to insure. The certificate and display duties sit in the Employers’ Liability (Compulsory Insurance) Regulations 1998, made under section 4 of that Act.
No statute requires a tradesman to hold public liability at all, let alone certify it. That side of the paperwork is driven entirely by contract.
Public liability is compulsory in practice rather than in law, because contracts demand it. Whether you need public liability is decided by your clients, not by Parliament.
Who asks to see each one
The employers’ liability certificate is for your own staff and for an HSE inspector. The public liability certificate is for clients, main contractors, letting agents and procurement teams.
| Employers’ liability certificate | Public liability certificate | |
| Legal status | Statutory, under the 1969 Act | No statutory form or duty |
| Prescribed content | Must state the minimum level of cover and the companies covered | Set by the insurer, typically insured, limit, dates and policy number |
| Display duty | Yes, where employees can readily access it | None |
| Typical limit shown | £10 million, against a £5 million legal minimum | £1m, £2m, £5m or £10m depending on the contract |
| Who checks it | Your employees and HSE inspectors | Clients and main contractors |
| Penalty for not producing it | Up to £1,000 | Losing the job |
What must an employers’ liability certificate state?
HSE requires the certificate to state clearly the minimum level of cover provided and the companies covered by the policy. The legal minimum is £5 million, though most insurers issue £10 million as standard.
The two prescribed items
The level of cover and the companies covered are the two things HSE guidance requires on the face of the certificate. Everything else on it is the insurer’s own presentation.
The £5 million figure comes from the government’s employers’ liability rules, not from the Health and Safety at Work Act. The £10 million most insurers offer is a market standard rather than a legal one.
Getting the insured name right
The companies covered must match the legal entity that employs the staff. A certificate in a trading name when the employer is a limited company is the most common error on site.
Group structures need every employing company named. A cleaning contractor running two companies needs both on the certificate or only one of them is insured.
Who is exempt from holding one
Family businesses where all employees are closely related are exempt, though that exemption does not apply to limited companies. A sole employee who owns 50% or more of the share capital is also outside the duty.
Exempt is not the same as excused by a client. Main contractors routinely ask for employers’ liability anyway, and a written explanation of the exemption rarely satisfies a compliance portal.
Where do you have to display it, and what if you do not?
You must display the certificate where your employees can readily see and access it. Electronic display has been permitted since October 2008, so a copy on a shared drive or an app is acceptable if staff know where it is.
Physical board or electronic copy
A framed certificate in the yard office still works. So does a PDF in the staff app, provided employees know it is there and can reach it without asking permission.
For a mobile workforce the electronic route is easier. A gardener with three staff who never visit an office has no notice board to pin anything to.
The two fines and what triggers them
Trading without cover when you employ someone attracts up to £2,500 for every day you are uninsured. Failing to display the certificate, or refusing to produce it for an HSE inspector, attracts up to £1,000.
The second penalty catches employers who are properly insured but disorganised. Producing the document on request is part of the duty, not an optional extra.
| Duty | What the law requires | Penalty |
| Hold cover | At least £5 million from the first employee | Up to £2,500 per day uninsured |
| Display the certificate | Where employees can readily access it, paper or electronic | Up to £1,000 |
| Produce it on request | To an HSE inspector when asked | Up to £1,000 |
| Retain expired certificates | No legal duty since 1 October 2008 | None, but strongly advised |
Source: HSE guidance on the Employers’ Liability (Compulsory Insurance) Act 1969.
How long do you have to keep old certificates?
There is no legal duty to keep expired employers’ liability certificates. The 40-year retention requirement ended on 1 October 2008, and keeping them is now advisory rather than compulsory.
Why HSE still recommends keeping them
Industrial disease claims can surface decades after the exposure that caused them. Asbestos, silica dust, noise-induced hearing loss and hand-arm vibration all have long latency periods.
If a former employee brings a claim in 2050 for exposure in 2026, the certificate identifies which insurer answers it. Without it, the liability can land on the business or its directors.
A practical retention habit
Save each renewal certificate as a dated PDF in one folder and back it up somewhere off the office computer. It costs nothing and takes a minute a year.
Keep the schedule alongside it, because the schedule shows the endorsements. What a tradesman policy covers changes year to year, and the schedule is the only record of what was in force when.
Why do clients and main contractors ask for a certificate?
Because hiring an uninsured trade transfers the risk to them. If you damage something and have no cover, the client is left chasing you personally through the courts.
Risk transfer, not paperwork
A certificate tells a client there is an insurer standing behind you. That is the whole point of the request, and it is why compliance teams check the limit rather than glancing at the logo.
Local authorities, NHS trusts, schools, housing associations and main contractors commonly specify £5 million of public liability, which is the most frequently required contract level.
Where scheme membership comes into it
Gas Safe, NICEIC, NAPIT, TrustMark, FMB, CHAS and SafeContractor all make liability cover a condition of membership. Letting a policy lapse can cost you the registration as well as the job.
Even low-risk trades get asked. A window cleaner quoting for a commercial block will be asked for the same evidence as a groundworker.
How does a client verify that a certificate is genuine?
By checking the dates, the insured name and the limit against the contract, then contacting the insurer or broker using the policy number. Every legitimate UK insurer and broker appears on the FCA register.
The four checks a compliance team makes
Does the insured name match the entity signing the contract, does the period of insurance span the works, does the limit meet the requirement, and does the trade description include what you are being hired to do.
A fifth check is becoming standard on larger sites: are there endorsements restricting height, depth or hot works that conflict with the job.
Checking the insurer behind it
The FCA Register confirms whether the insurer or broker named on the certificate is authorised. It takes under a minute and is the only reliable way to check.
The policy number is what makes verification possible, so never redact it before sending. It is the reference the insurer uses to confirm your public liability cover is live.
Why do certificates get rejected, and how do you fix it?
Almost every rejection comes down to four things: the wrong name, the wrong dates, a limit below the contract requirement, or an activity that is not listed. All four are fixable in a phone call.
The four common rejections
A certificate in your trading name when the contract is with your limited company fails immediately. So does one that expires mid-contract, even by a fortnight.
A £2 million limit against a £5 million requirement fails, and so does a certificate whose trade description does not mention the work you are quoting for. Stepping a limit up costs far less than losing the contract.
Additional insured and interested party requests
Large clients sometimes ask to be noted on your policy as an interested party or to receive a waiver of subrogation. Your insurer can usually do it, but they have to be asked before you sign.
Never agree a contractual insurance clause you have not shown your broker. Contract terms can require cover a standard trade package does not include.
How to get a certificate quickly
Most insurers issue certificates instantly at inception and at each renewal, usually through an online portal. There is no charge for the document itself, though some brokers charge a small admin fee to reissue paperwork.
Frequently Asked Questions (FAQs)
No. The certificate confirms cover is live, while the policy wording and schedule set out the terms, exclusions and endorsements.
Yes, where your employees can readily access it. Electronic display has been allowed since October 2008, provided staff know where the document is.
Up to £1,000 for failing to display it or refusing to produce it for an HSE inspector. Trading uninsured is a separate penalty of up to £2,500 per day.
There is no legal requirement since the 40-year rule ended on 1 October 2008. HSE still advises keeping them because disease claims can arrive decades later.
Yes. Certificates carry the policy number, and clients need it to verify the cover with the insurer or broker.
Usually not, if you are the sole employee and own at least 50% of the share capital. Main contractors may still ask for it before granting site access.
£5 million of public liability is the most commonly specified level for local authority, NHS and main contractor work. Domestic work often runs on £1 million or £2 million.
Check the insured name, the dates, the limit and the trade description against the contract. Your broker can reissue a corrected certificate or increase the limit the same day.