Contractor insurance is one of those topics that tends to get pushed to the bottom of the to-do list when you first set up on your own. There’s a company to form, a contract to sign, a first invoice to raise — and arranging cover feels like admin for future-you. Then future-you finds out that their end client won’t let them through the door without proof of professional indemnity insurance.

We see this regularly with the contractors we work with. The good news is that the core policies most contractors need are straightforward, and premiums are generally lower than people expect. The less good news is that the insurance market is good at selling you cover you don’t necessarily need, packaged in language that makes everything sound essential.

So here is our plain-English take on what to prioritise, what to consider, and what you can probably leave on the shelf for now.

If you speak to experienced contractors about insurance, two types come up consistently as non-negotiable: professional indemnity (PI) insurance and public liability (PL) insurance. They cover different risks, and both are worth understanding properly.

Professional indemnity insurance

PI insurance protects you if a client claims your work, advice, or deliverables caused them a financial loss. If you are an IT contractor and a bug in your code causes a system outage that costs the client money, PI insurance covers the legal and compensation costs. If you are a consultant and your recommendations are later disputed, the same applies.

This is not a theoretical risk. Many end clients — particularly larger organisations — will require you to hold PI cover as a condition of the contract. We have seen contractors lose contract opportunities simply because they couldn’t produce a certificate at short notice. If you are working in the public sector or on government contracts, the requirement is almost always explicit.

Public liability insurance

PL insurance covers you if you cause injury to a third party or damage to their property in the course of your work. If you are on a client’s premises and you accidentally damage equipment, PL insurance steps in. It is worth noting that standard home insurance will not cover damage you cause while working — even if you work from home — so do not assume existing policies have you covered.

The level of cover required varies. Many contracts specify a minimum of £1 million or £2 million, and some public sector contracts set higher thresholds still.

Employers liability (EL) insurance is a legal requirement if you employ anyone — including temporary staff, part-time workers, or in many cases subcontractors who work under your direction. The legal minimum is £5 million of cover, though most policies are written at £10 million.

If you operate as a sole contractor with no staff and no subcontractors working under you, you generally do not need EL insurance. However, the moment you bring someone else into your business in any capacity, the position changes and you need to take advice on your obligations.

For contractors bidding on public sector or government contracts, EL insurance is often listed alongside public liability as a standard requirement — regardless of whether you currently have staff. It is worth having in place if this type of work is part of your pipeline.

One thing we tell contractors: do not wait until a contract requires it before you think about this. Arranging cover takes a few days at most, but doing it in a hurry with a contract on the line is not a position you want to be in. Build it into your setup from the start if your work takes you onto client sites or involves any kind of project delivery.

IR35 investigation insurance — sometimes called tax investigation insurance — covers the professional costs of defending yourself if HMRC opens an IR35 enquiry into your working arrangements. It does not cover any additional tax or National Insurance you might owe if HMRC succeeds; it covers your accountant’s and solicitor’s fees in responding to the investigation.

In our view, this falls into the “optional but sensible” category for many contractors, particularly those operating through a limited company inside or near the boundary of IR35. An HMRC investigation can be time-consuming and expensive to defend, even if you are ultimately in the right. Having cover means you can engage proper professional support without watching the costs escalate.

That said, it is not essential in the way that PI and PL insurance are. If you are working on a single, clearly off-payroll contract with a robust set of working practices and a well-drafted contract, the risk is lower. If you are managing multiple clients across shifting contractual arrangements, the peace of mind is more valuable.

Some accountancy practices — including ours — include or offer access to tax investigation cover as part of a wider service. It is worth asking your accountant what is already included before purchasing a standalone policy.

Strictly speaking, these are not contractor insurance policies in the business sense — they are personal financial planning products. But they deserve a mention because they address a real vulnerability that many contractors overlook.

When you work for yourself, there is no employer sick pay. If you are off work for several months due to illness or injury, your income stops. Income protection insurance pays a proportion of your earnings after a waiting period, for a defined term or until you return to work. For contractors with mortgages, families, or financial commitments built around a consistent monthly income, this can matter enormously.

Life cover and critical illness cover sit in a similar category — personal decisions rather than business requirements, but ones that your financial position as a contractor makes more pressing than they might have been in employment.

We are not financial advisers, so we will not go further into the detail here. But if you have moved from employment to contracting and your financial protections have not kept pace with that change, it is worth having a proper conversation with an independent financial adviser. Getting the business insurance right is only part of the picture.