Business insurance is one of the least glamorous parts of running a contractor PSC and one of the easiest to get wrong. Getting it right is trivially cheap. Getting it wrong — contracting without the cover the client actually requires, or discovering post-incident that your policy doesn't extend to the specific work — is expensive.
Here's the practical framework for UK contractor insurance in 2026/27: what you actually need, what clients demand, what to pay, and where to buy.
The three insurances explained
Professional Indemnity (PI)
The core insurance for anyone doing knowledge work. PI covers you against claims from clients that your professional advice, design, or deliverable caused them financial loss — because it was defective, missed a deadline, breached IP, or misinterpreted a specification.
Typical claim types PI covers:
- A software system delivered with defects that cause client downtime or data loss
- An IT recommendation that the client acts on and later attributes losses to
- Missed project deadlines with contractual damages
- Third-party IP infringement in code or content you delivered
- Confidentiality breaches (accidental data release)
Cover levels: £1m is the mainstream floor, £2m increasingly common, £5m required by some financial services and government clients. Higher-limit policies scale in premium linearly — typically 25–50% more per doubling of cover.
Public Liability (PL)
Covers third-party injury or property damage caused by your business activities. For a laptop-based contractor working from home, the risk is low. For one working on client premises, it's material — you could trip over a cable and damage client equipment, or accidentally injure someone during a site visit.
Standard cover: £1m to £5m. Bundled with PI at negligible additional cost.
Employer's Liability (EL)
Covers claims from your employees for injury or illness caused by their work. Legally required by the Employers' Liability (Compulsory Insurance) Act 1969 for any UK business with employees. Minimum statutory cover: £5m. Most policies sold as £10m as standard.
What clients actually require in contracts
Almost every commercial contract of any complexity includes an insurance clause. Typical wording:
"The Supplier shall maintain, at its own cost, insurance policies with reputable insurers to cover its liability under this Agreement, including without limitation: Professional Indemnity cover of not less than £1,000,000; Public Liability cover of not less than £2,000,000; Employer's Liability cover of not less than £10,000,000."
Standard requirements by sector (mainstream ranges — check each contract):
| Sector | PI minimum | PL minimum | EL minimum |
|---|---|---|---|
| General IT / SaaS / SME | £1m | £2m | £10m |
| Financial services | £2–5m | £5m | £10m |
| Central government | £2–5m | £5m | £10m |
| Local government | £1–2m | £5m | £10m |
| Engineering consultancy | £2–5m | £5m | £10m |
| Health / life sciences | £5m+ | £5m | £10m |
Under-insuring against the contract requirement is a technical breach — clients rarely enforce it while things are going well, but it becomes a get-out clause for the client if anything goes wrong. Match the contract, don't fight it.
Factor insurance into your rate calculation
Insurance is a business cost — run your day rate through the calculator to check take-home nets out after all overheads.
Open the calculator →What a policy typically costs in 2026/27
For a single-director UK PSC, a standard contractor insurance bundle costs roughly:
| Cover profile | Typical annual premium |
|---|---|
| £1m PI + £2m PL + £10m EL (IT/consulting) | £170–£300 |
| £2m PI + £5m PL + £10m EL (mid-tier) | £280–£450 |
| £5m PI + £5m PL + £10m EL (financial services) | £450–£800 |
| Same profile + IR35 investigation cover add-on | +£150–£300/year |
Premiums reflect the assumed risk profile of your work. High-risk sectors (medical, structural engineering, financial advice with client-money exposure) pay more. Standard IT contractors, digital consultants, and management consultants sit at the lower end.
The bundle is fully deductible against corporation tax as a business expense, so the effective net cost is 15–25% lower than the headline figure once corp tax relief kicks in.
UK contractor insurance providers — who to look at
The UK contractor insurance market has consolidated around a handful of specialists that understand the PSC structure and price accordingly. Alphabetical list:
Caunce O'Hara
Long-established contractor insurance specialist. Fixed contractor-focused packages. Strong on IR35 tax investigation insurance bundling.
Hiscox
Mainstream insurer with a strong small-business/PSC arm. Higher-end pricing but strong claims-handling reputation. Good for higher-cover requirements or non-standard risk profiles.
Kingsbridge
One of the best-known contractor insurance names in the UK. Wide product range including PI/PL/EL bundles, professional fees insurance, and IR35 investigation cover. Contractor-specific pricing and fast online quoting. See the homepage for the sidebar link to their contractor bundle.
Markel
Insurer group (parent of the former Abbey Tax brand). Strong in the tax investigation insurance area, plus standard PI/PL bundles. Often sold via specialist brokers rather than direct.
Qdos
Better known for IR35 contract reviews, but also offers contractor insurance bundles including PI/PL/EL and tax investigation cover in a single package. Competitive pricing for contractors who also want IR35 review services.
The IR35 investigation cover question
Distinct from the PI/PL/EL bundle: tax investigation insurance covers the cost of professional fees (accountancy and legal) if HMRC opens an IR35 enquiry into you. It does not cover the tax bill itself — only the cost of professional representation.
Typical annual cost: £150–£300 for a standalone policy, or bundled into a contractor insurance package for a smaller premium uplift.
When it makes sense:
- You're operating under Chapter 8 (small client, overseas client) where you are the party HMRC would investigate
- You've had a borderline SDS from a client and want cover in case HMRC challenges it retrospectively
- You're a long-term contractor and want a professional-fees safety net across multiple engagements
When it's less necessary:
- You're operating exclusively via medium/large clients under Chapter 10 (off-payroll working) with clean SDSs — HMRC would investigate the client/fee payer, not you
- You have an accountant on a retainer that already covers HMRC correspondence within the monthly fee
Common mistakes contractors make on insurance
- Under-insuring against contractual minimums. Contract says £2m PI, contractor has £1m. Technically in breach. Usually only a problem when there's a claim.
- Buying insurance for the wrong professional description. Insurers rate premiums by SIC code or professional description. Buying a "general management consultant" policy when you're actually doing regulated financial advice work is a coverage gap waiting to bite.
- Letting cover lapse between contracts. Some contractors let PI drop during a gap between engagements to save 3 months of premium. Claims can arise from work done years earlier — PI is written on a claims-made basis, so if you're not insured when the claim arrives, you're not covered. Maintain continuous cover.
- Ignoring retroactive cover. When switching insurers, ensure the new policy has retroactive cover to at least the start of your earliest live engagement. Otherwise, work done under the old insurer isn't covered by the new one either.
- Paying personally. The insurance is a business expense. Pay it from the company account so it lands in the P&L for corp tax relief. Reimbursing yourself from personal spending is messier.
- Buying the cheapest option without checking exclusions. The £170 policies often have significant exclusions (e.g. work for financial services clients, certain jurisdictions, cyber-related claims). Read the schedule, not just the headline number.
The honest bottom line
Contractor insurance is one of the cheapest problems to solve well in a UK PSC. A £300–£500 annual bundle covering PI/PL/EL protects you against the risks that actually matter, satisfies almost every client contract you'll see, and is fully tax-deductible. Buy it from a contractor specialist rather than a generic small-business insurer, match your cover levels to the contracts you're likely to sign, and keep it continuous across engagements.
The addition of IR35 investigation insurance is worth considering if you're operating under Chapter 8 or want a professional-fees safety net. For most Chapter 10 contractors on clean outside SDSs, it's optional.