Contractor Insurance UK 2026: What You Need, What It Costs and How to Compare

What Is Contractor Insurance?

Contractor insurance is not a single product but a package of covers designed for self-employed contractors, freelancers, and limited company contractors working in the UK. The core covers are professional indemnity (PI), public liability (PL), and employers liability (EL) where the contractor has staff or engages sub-contractors. Additional covers include IR35 insurance, tools and equipment cover, cyber insurance, business interruption, and personal accident and sickness cover.

Unlike employees who are covered by their employer insurance, contractors working through their own limited company or as sole traders are personally responsible for their own insurance. Most professional service contracts and agency agreements require evidence of PI and PL insurance before work commences. Some contracts specify minimum cover levels.

Professional Indemnity Insurance for Contractors

Professional indemnity insurance is the most important cover for most contractors. It protects against claims by clients that the contractor work, advice, designs, or professional services were negligent, inadequate, or caused the client financial loss. PI pays the cost of defending the claim and any compensation found owing up to the policy limit.

Most client contracts require contractors to hold at least 1 million pounds of PI cover. Some contracts, particularly in financial services, legal, and engineering sectors, require 2 million or 5 million pounds. The Solicitors Regulation Authority requires law firms to hold at least 2 million pounds (3 million for incorporated practices). RICS requires surveyors to hold PI. ICAEW requires accountants to hold PI.

PI policies are typically written on a claims-made basis. This means a claim must be reported to the insurer during the policy period, regardless of when the work giving rise to the claim was carried out. It is important to maintain continuous PI cover and to arrange run-off cover if ceasing to trade, because a client can bring a professional negligence claim for up to 6 years after the negligent act under the Limitation Act 1980.

PI premiums for contractors in 2026 start from approximately 150 pounds per year for low-risk consultants with 1 million pounds of cover, according to Paterson Insurance Brokers. High-risk sectors such as structural engineering, financial advice, and medical professionals pay significantly more. Simply Business quotes PI from 6.53 pounds per month (78.40 pounds per year) for the lowest-risk profiles at 1 million pounds cover.

Public Liability Insurance for Contractors

Public liability insurance covers claims by third parties (clients, members of the public, suppliers) for accidental bodily injury or accidental damage to their property caused by the contractor business activities. If a contractor working at a client site accidentally damages equipment or injures a visitor, PL covers the compensation and legal defence costs.

PL is not a legal requirement for contractors (unlike employers liability) but is expected by most clients and is usually required by contracts. Many commercial clients require PL cover of at least 2 million or 5 million pounds. Cover limits of 1 million pounds may be sufficient for lower-risk domestic work but commercial contracts typically specify higher limits.

PL premiums for sole traders on lower-risk work start from approximately 70 to 200 pounds per year. Higher-risk trades, higher turnover, and commercial work push premiums higher. Manual contractors in construction, electrical work, and plumbing pay more than knowledge-based contractors in consulting and IT.

Employers Liability for Contractors with Staff

If a contractor employs anyone, including part-time or temporary staff, apprentices, or regular sub-contractors who are not operating their own independent businesses, employers liability insurance is a legal requirement under the Employers Liability (Compulsory Insurance) Act 1969. The minimum cover is 5 million pounds per claim, though the market standard is 10 million pounds. HSE fines of up to 2,500 pounds per day apply for operating without valid EL cover.

IR35 Insurance

IR35 insurance covers the cost of an HMRC investigation into whether a contractor arrangement falls within the IR35 off-payroll working rules, and any additional tax, National Insurance, and interest found owing as a result. HMRC can investigate arrangements going back several years, so the potential liability can be significant. IR35 insurance is available from specialist providers and is often included in contractor insurance packages. The premium depends on the contract value and the risk profile of the engagement.

Frequently Asked Questions

Do I need professional indemnity as a contractor?

Most professional service contracts require PI before work starts. Even where it is not contractually required, PI protects against claims that can run to tens of thousands of pounds in legal and compensation costs. Most contractors providing advice, designs, or professional services should hold PI.

How much professional indemnity do I need?

Most contracts specify 1 million pounds minimum. Contracts in financial services, legal, engineering, and medical sectors often require 2 million or 5 million pounds. Always check the contract requirements before purchasing and do not underinsure.

Is public liability legally required for contractors?

No, PL is not a legal requirement. But most clients require it and it is practically essential for contractors working at client sites or engaging with the public. Employers liability IS a legal requirement for contractors with employees or sub-contractors.

What is claims-made PI insurance?

A claims-made policy covers claims reported to the insurer during the policy period, regardless of when the underlying work was done. If you let a claims-made PI policy lapse, you lose cover for claims arising from past work. Maintain continuous cover or arrange run-off insurance if stopping trading.