Professional Indemnity vs Employers' Liability Insurance: Statutory and Contractual Compared

Category: PI comparison · Reviewed by Matt Bartlett, Director · Founder · Last reviewed May 2026

Employers’ Liability (EL) insurance and Professional Indemnity (PI) insurance answer entirely different exposures, yet they often appear together on UK businesses’ schedules. EL is required by statute for almost all UK employers. PI is required by certain professional bodies, by some clients and by some contracts, but is not a general statutory requirement. The two lines differ in trigger basis, in the type of claimant and loss they answer, in the statutory framework around them and in how they interact with other covers.

This article sets out the mechanical differences between PI and EL, the statutory framework for EL under the Employers’ Liability (Compulsory Insurance) Act 1969, and the structural questions that arise when firms place both lines.

What this comparison is about

PI and EL are sometimes confused because both are “liability” products, both pay defence costs, and both are commonly bought by SME firms with employees. The two policies, however, are structured around different exposures: EL responds to employee claims for work-related injury or illness; PI responds to client claims for financial loss arising from professional negligence.

This article maps the mechanical differences, addresses the statutory minimum requirements for EL, and works through scenarios where the two lines occasionally meet (for example employment-related professional negligence claims, or stress-related employee claims that involve both lines).

A note on policy-line comparisons

EL is a statutory product with a defined minimum framework. PI is a contractual product whose scope varies widely between professions and wordings. Where this article describes “typical” features, those are common market features only. The actual cover under any given policy is determined by its schedule, insuring clauses, definitions and exclusions, and (for EL) by the statutory framework.

The statutory framework for EL

Employers’ Liability insurance is required by the Employers’ Liability (Compulsory Insurance) Act 1969 for most UK employers. The Act and the related Regulations require:

• Most employers to maintain insurance against liability for bodily injury or disease sustained by employees arising out of and in the course of their employment.
• A minimum statutory indemnity limit of £5m in respect of claims arising out of any one occurrence. Most market policies provide £10m or higher.
• The policy to be issued by an authorised insurer.
• The certificate of insurance to be displayed (or made available electronically) so that employees can see it.

A small number of employers are exempt under the Regulations — for example public sector bodies, certain family businesses where all employees are close relatives, and businesses with no employees in the statutory sense. Otherwise, the duty applies.

Penalties for failing to maintain compulsory EL include fines for each day the employer is uninsured. The HSE enforces the Act.

PI, by contrast, is not generally a statutory requirement. Specific regulators require PI of their regulated firms (the SRA for solicitors, ARB for architects, ICAEW/ACCA/AAT for accountants, FCA for many financial firms, etc.), but there is no general statutory requirement for PI applicable to UK businesses at large.

What PI covers

Who is typically insured

The firm itself — company, LLP or partnership — and (typically) partners, directors and employees acting in the course of the firm’s professional services.

What triggers the policy

A third-party claim alleging civil liability arising from the conduct of the insured’s professional services. Typical insuring clauses cover negligence, breach of duty, breach of contract, dishonesty of employees, libel, slander and IP infringement.

Defence costs

Commonly in addition to the limit of indemnity; some wordings include defence costs within the limit.

Trigger basis

Claims-made and notified, with a retroactive date.

Typical limits and aggregation

Limits are commonly “any one claim” and/or “in the aggregate”.

Common extensions

Loss of documents, dishonesty of employees, court attendance compensation, run-off cover.

Common exclusions

Bodily injury and property damage are typically excluded. Insolvency, fraudulent conduct by principals, fines and penalties, contractual liability beyond professional duty.

What EL covers

Who is typically insured

The named insured is the employer. The persons protected by the insurance are the employer’s employees — including, in many wordings, agency staff, casual workers, apprentices, work experience placements and persons “under the control” of the employer in defined circumstances. The Act and the regulations define the scope of who counts as an employee for compulsory insurance purposes.

What triggers the policy

EL responds to claims by employees (or their dependants) for bodily injury, disease or death sustained in the course of and arising from their employment, where the employer is legally liable. The legal basis is typically the employer’s common-law duty of care, supplemented by statutory duties under health and safety legislation.

Defence costs

Commonly covered in addition to the limit of indemnity.

Trigger basis

EL is written on an occurrence basis. The policy responds where the injury or disease was caused during the policy period, regardless of when the claim is first brought. For long-tail diseases (asbestos-related disease, noise-induced hearing loss, work-related stress where causation is complex), this can mean policies from many years ago are called upon.

Typical limits

Minimum £5m statutory; market norm £10m, sometimes £25m or higher. The Act sets the floor; market practice exceeds it.

Common extensions

Cover for unsatisfied court judgments, costs of defence in HSE prosecutions, criminal defence costs for individuals (subject to outcome), and similar.

Common exclusions

Punitive or exemplary damages may be limited by wording or by public policy. Liability assumed by contract beyond the common-law duty may be excluded. Bodily injury sustained outside the course of employment is excluded. Liability that should sit on PI (e.g. financial loss from professional services) is generally outside scope.

Where they overlap

Genuine overlap between PI and EL is rare, but the lines can meet in certain factual contexts:

• Stress-related employee claims — Where an employee sues the employer for psychiatric injury arising from work pressure, EL responds (subject to causation and foreseeability). If the claim also alleges that managers gave negligent professional advice (for example HR or occupational health advice from internal advisers acting in a professional capacity), some aspects could intersect with PI, though this is unusual.
• Employee acting in professional capacity injures themselves — An employee professional injured at work claims under EL for the injury. If the same incident also gives rise to a client claim for negligent service (e.g. an injured surveyor unable to complete the inspection), the client claim would be the PI question.
• Sub-contractors and labour-only contractors — Whether a worker is treated as an employee for EL purposes can be a factual question. Some sub-contracted personnel are treated as employees for EL; the same worker’s negligent professional conduct might attract PI.
• HR and employment advisory services — Firms providing HR or employment advice carry PI for the advisory service. Their own employees’ work-related injuries sit on EL.

These intersections are unusual. Most exposures sit clearly on one line or the other.

Where they differ in trigger and mechanics

• Statutory framework — EL is compulsory under the 1969 Act for almost all employers; PI is required by specific regulators and contracts, not by general statute.
• Trigger basis — EL is occurrence-based; PI is claims-made and notified.
• Who is the claimant — EL claimants are employees (or dependants); PI claimants are clients (or others owed a professional duty).
• Nature of loss — EL is for bodily injury, disease or death; PI is for financial loss arising from professional services.
• Statutory minimum limit — EL must be at least £5m by statute; PI has no general statutory minimum (though specific professions do).
• Run-off — PI commonly requires run-off after cessation; EL run-off is less common as a separate purchase because the policy in force when the injury was sustained typically remains liable.

Comparison table — objective policy mechanics

Common scenarios — which policy responds

Scenario 1 — Employee sues firm for stress-related illness. An employee of an accountancy firm sues for psychiatric injury arising from sustained work pressure. The claim alleges breach of the employer’s duty of care. EL is the policy that responds. PI is generally not engaged because the loss is not financial loss arising from professional services rendered by the firm.

Scenario 2 — Client sues firm for negligent advice. A client of the same firm sues for losses arising from negligent tax advice. PI is the policy that responds. EL is not engaged because the claimant is not an employee.

Scenario 3 — Employee injured by office equipment. An office worker injures their back lifting equipment. The claim is brought against the employer under common-law duty of care and health and safety statute. EL is the policy that responds.

Scenario 4 — HR consultancy sued by employee of its client. An HR consultancy advises a client on disciplinary procedure. The client’s employee, having been dismissed, sues the consultancy for negligent advice. PI is the policy that responds for the consultancy’s exposure. The client’s own EL responds to the underlying employment claim against the client.

Scenario 5 — Sub-contractor injured on a project. A sub-contractor on a project is injured. Whether EL responds depends on whether the sub-contractor is treated as an employee for EL purposes — a factual question that turns on the working relationship. PL may also be relevant if the sub-contractor is genuinely an independent contractor injured during the principal’s operations.

When firms typically need both

Almost any UK firm with employees needs EL by statute. Whether the same firm needs PI depends on its activities: if it provides professional services, advice or recommendations to clients, it usually carries PI. Most professional services firms therefore hold both — EL for the workforce and PI for the client-facing service.

Some firms have employees but provide no professional services to clients (for example a manufacturer or retailer) and so hold EL without PI. Some firms have no employees but provide professional services and so hold PI without statutory EL (though sole traders with no employees should verify their position under the Regulations).

When one alone may suffice

Firms with employees but no professional service to clients may not require PI. Firms without employees in the statutory sense may not require EL (though the definitions in the Regulations should be checked carefully — for example labour-only sub-contractors can attract EL exposure even where the firm has no PAYE employees).

Practical structuring considerations

• Combined Liability or Commercial Combined policies bundle EL with PL and (sometimes) PI under one schedule. Limits, exclusions and aggregates apply to each section separately.
• Standalone EL is rare in practice; EL is almost always bundled into a Commercial Combined or Combined Liability policy.
• EL certificates must be made available to employees under the Regulations.
• Trigger basis differences mean that for long-tail employee injuries (asbestos, noise, repetitive strain, late-emerging stress claims), the policy in force when the injury was sustained or contracted is the one called upon. This makes EL claims history particularly important when changing insurer.
• Limit choice — most insurers offer £10m or higher EL limits at little additional cost above the statutory £5m, reflecting both higher actual exposure and market norms.

What to ask before placing or renewing

1. Are the EL limits at least the statutory £5m, and is the market norm of £10m or higher appropriate for the firm’s headcount and risk profile?
2. Are all employees (including agency, casual, apprentices and labour-only sub-contractors as applicable) within the scope of the EL definition?
3. Is the EL certificate available to employees, in line with the Regulations?
4. On what trigger basis is each policy written — EL occurrence, PI claims-made?
5. Are defence costs in addition to the limit on both policies?
6. How does the PI policy define the firm’s professional services, and is the EL policy aligned in respect of employee work activities?
7. For long-tail historical exposures, is there a clear record of insurers and limits in force?
8. How are sub-contractors and project-based workers treated by each policy?

How a broker helps coordinate

A broker placing both lines reviews the EL certificate, confirms statutory compliance, assesses limits against headcount and exposure, and aligns the PI placement with the firm’s professional services. Coordination is rarely needed between the two policies because their exposures are distinct, but record-keeping for long-tail EL claims and run-off arrangements for PI both benefit from broker oversight. Apex Insurance Brokers Limited arranges both PI and EL for UK firms; placement is one of several options available to a UK business, and the right structure depends on the firm’s activities, headcount and regulatory position.

FAQ

Is EL really compulsory for almost all employers? Yes. The Employers’ Liability (Compulsory Insurance) Act 1969 makes it a statutory duty for most UK employers to maintain EL cover for liability to employees for work-related injury or disease. A small set of exempt categories exists in the Regulations, but the duty applies to the great majority of employers.

What is the statutory minimum EL limit? £5m in respect of claims arising out of any one occurrence. Market norms exceed this — £10m is common, £25m available.

Is PI compulsory in the UK? Not generally. PI is compulsory for some regulated professions (solicitors, architects, accountants in regulated practice, financial advisers and others) but is not a general statutory requirement.

Does EL cover stress claims? Subject to the law and to the policy wording, claims for psychiatric injury arising from work pressure can engage EL. Causation and foreseeability are issues that affect liability.

Can I run EL on a claims-made basis? EL is typically occurrence-based by market convention and (in the UK) by the framework around the Act. Claims-made EL is rare in the UK.

What happens if I do not have EL? The HSE can prosecute employers who fail to maintain compulsory EL, with daily fines for each day uninsured. Employees retain their common-law and statutory rights to sue the employer; the absence of insurance creates personal exposure for the business.

Do sole traders need EL? A sole trader with no employees in the statutory sense does not require EL. The position needs to be assessed against the Regulations — for example, certain labour-only contractors can count as employees for EL purposes.

Do I need PI if I already have EL? EL does not respond to professional negligence claims by clients. If the firm provides services to clients in a way that exposes it to civil-liability claims, PI is a separate question.

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Related guides

• Professional Indemnity Insurance overview
• Employers’ Liability Insurance overview
• Commercial Combined Insurance
• Does my professional body require PI insurance?
• Contact Apex Insurance Brokers

About Apex Insurance Brokers — Apex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority, FCA firm reference 724952. Registered in England and Wales, Companies House 07014570. Last reviewed: May 2026.