Professional Indemnity Insurance — Who Needs It?

The Accounted Business Team·2 March 2026·9 min read

When you're working for yourself, insurance probably isn't the most exciting topic on your to-do list. But professional indemnity insurance (often shortened to PI insurance) is one of those things that can quietly save your business if something goes wrong — and for some professions, it's not optional.

Whether you're a consultant, designer, accountant, developer, or any other type of professional, this guide will help you understand what professional indemnity insurance is, whether you need it, and what to look for in a policy.

What Is Professional Indemnity Insurance?

Professional indemnity insurance covers you against claims made by clients or third parties who suffer a financial loss because of your professional advice, services, or work. In plain terms, it protects you if someone says you made a mistake that cost them money.

This could include:

Negligent advice — you give a client guidance that turns out to be wrong, and they lose money as a result
Errors or omissions — you make a mistake in your work (a calculation error, a coding bug, a factual inaccuracy) that causes the client a loss
Breach of contract — you fail to deliver what was agreed, and the client suffers financially
Breach of confidentiality — you accidentally disclose sensitive client information
Intellectual property infringement — you inadvertently use someone else's copyrighted material in your work
Loss of documents or data — you lose or damage important client documents or files

PI insurance typically covers legal defence costs as well as any compensation or settlements. Even if a claim against you is ultimately unfounded, the cost of defending yourself can be substantial, and PI insurance covers those costs too.

How Is It Different from Public Liability Insurance?

This is a common source of confusion. Public liability insurance covers claims for physical injury or property damage — for example, if a client trips over your equipment and breaks their arm. Professional indemnity insurance covers financial losses arising from your professional work.

If you're a tradesperson or you work on client premises, you might need both. If you primarily provide advice, consultancy, or creative services, PI insurance is likely the more important of the two. For a broader look at the types of insurance available, have a read of our sole trader insurance guide.

Who Needs Professional Indemnity Insurance?

The answer depends on your profession, your clients, and your contractual obligations.

Legally Required

Some professions are legally required to hold professional indemnity insurance as a condition of practising. These include:

Solicitors — required by the Solicitors Regulation Authority (SRA)
Accountants and auditors — required by their professional body (ICAEW, ACCA, etc.)
Architects — required by the Architects Registration Board (ARB)
Financial advisers — required by the Financial Conduct Authority (FCA)
Surveyors — required by the Royal Institution of Chartered Surveyors (RICS)
Healthcare professionals — various regulatory requirements depending on the profession

If your profession has a regulatory body, check their requirements. Practising without the required insurance could result in disciplinary action or loss of your licence.

Contractually Required

Even if your profession doesn't legally mandate PI insurance, many clients — particularly larger companies, government bodies, and public sector organisations — require it as a condition of doing business with you. You'll often find minimum PI cover requirements written into tender documents, procurement processes, and client contracts.

Common minimum levels range from £250,000 to £2 million, depending on the industry and the nature of the work.

Strongly Advisable

Even if it's not legally or contractually required, professional indemnity insurance is strongly advisable for anyone whose work involves:

Giving advice or recommendations
Creating designs, plans, or specifications
Handling client data or documents
Providing technical or specialist services
Writing content that clients rely on for business decisions

This covers a huge range of sole traders and freelancers: web developers, graphic designers, copywriters, marketing consultants, IT professionals, project managers, translators, photographers, and many more.

Probably Not Necessary

If your work is purely manual or physical — cleaning, gardening, decorating — and doesn't involve giving advice or creating intellectual output, you're unlikely to need PI insurance. Public liability insurance would typically be more relevant for these professions.

What Does a Policy Actually Cover?

PI insurance policies vary, but a typical policy will cover:

Claims and Legal Costs

The core of any PI policy is coverage for claims of professional negligence, including the cost of legal defence and any damages or settlements. This applies whether the claim is justified or not — even frivolous claims can be expensive to defend.

Retroactive Cover

Most PI policies cover claims made during the policy period, regardless of when the work was done (subject to a retroactive date). This is important because claims can arise months or even years after the work was completed. Some policies offer "run-off cover," which continues to protect you for claims arising after you stop practising.

Loss of Documents

If client documents or data are lost, damaged, or destroyed while in your care, the policy typically covers the cost of restoring or replacing them.

Defamation

If you're accused of libel or slander in the course of your professional work (more common than you might think for writers, consultants, and PR professionals), PI insurance usually covers this.

Intellectual Property Infringement

If a client claims that your work infringes their intellectual property rights — or if a third party claims you've used their copyrighted material without permission — PI insurance covers the legal costs and any settlements.

How Much Cover Do You Need?

This is one of the most common questions, and the answer is: it depends. Here are some factors to consider.

Industry Norms

Check what's standard in your industry. If you're a management consultant, £1 million to £5 million is common. If you're a freelance graphic designer, £250,000 to £500,000 might be sufficient.

Client Requirements

If your clients specify minimum levels of PI cover, that gives you a clear baseline. Even if only one client requires it, you'll need a policy that meets their threshold.

Size and Value of Projects

Consider the value of the contracts you work on. If a mistake in your work could cost a client £100,000, having £50,000 of cover isn't going to be enough. A reasonable rule of thumb is to have cover that's at least equal to the value of your largest contract, and ideally higher.

Risk Profile

How likely are you to face a claim? This varies by profession. Architects, surveyors, and financial advisers face relatively high claim frequencies. Copywriters and photographers face lower frequencies, but the potential impact of a claim can still be significant.

How Much Does It Cost?

Professional indemnity insurance premiums depend on several factors:

Your profession — higher-risk professions pay more
Your turnover — higher turnover generally means higher premiums
Level of cover — more cover costs more
Claims history — previous claims increase your premiums
Excess — a higher excess (the amount you pay towards a claim) reduces your premium

For a sole trader with a turnover under £100,000 and a relatively low-risk profession, you might pay anywhere from £100 to £500 per year for a reasonable level of cover. Higher-risk professions or larger turnovers will pay more.

It's worth shopping around and getting quotes from several providers. Specialist brokers like Hiscox, PolicyBee, and Simply Business offer online quotes for sole traders and freelancers.

Is It Tax-Deductible?

Yes. Professional indemnity insurance is a legitimate business expense, and you can deduct the cost from your taxable profits. Make sure you keep the receipt and record the expense in your bookkeeping. If you're using Accounted, Penny can help you categorise it correctly so it's captured at tax time.

How to Choose the Right Policy

When comparing policies, don't just look at the price. Pay attention to:

Policy Wording

Read the policy document carefully (or at least the key exclusions). Understand what's covered and, just as importantly, what isn't. Common exclusions include:

Claims arising from criminal or fraudulent acts
Contractual liabilities that go beyond your general legal obligations (be careful about what you agree to in client contracts)
Known issues — if you were aware of a potential claim before taking out the policy, it won't be covered
Fines and penalties imposed by regulators

Aggregate vs. Per-Claim Limits

Some policies have an aggregate limit (total amount payable across all claims in the policy year) while others have a per-claim limit. Per-claim limits are generally more protective, but aggregate limits are more common at lower price points.

Retroactive Date

Check the retroactive date on your policy — this determines how far back the policy covers. If you've been practising for five years but your policy only has a retroactive date of two years, any claims arising from work done before that date won't be covered.

Excess

The excess is the amount you pay towards each claim before the insurance kicks in. A higher excess means lower premiums, but make sure the excess is an amount you could actually afford to pay if a claim arose.

Run-Off Cover

If you plan to stop practising in the future — whether through retirement, career change, or closing your business — consider run-off cover. This extends your protection for claims arising after you stop working, which is important given that claims can surface years later.

What to Do If a Claim Is Made Against You

If a client makes a complaint or threatens legal action, here's what to do:

Don't panic — a complaint isn't the same as a successful claim. Many are resolved amicably.
Don't admit liability — be careful about what you say or write. Admitting fault before consulting your insurer could compromise your cover.
Notify your insurer immediately — most PI policies require you to notify the insurer as soon as you become aware of a potential claim or circumstance that could lead to a claim. Failing to notify promptly could invalidate your cover.
Gather documentation — collect all relevant emails, contracts, briefs, deliverables, and correspondence. This is why keeping good records matters.
Follow your insurer's guidance — they'll typically appoint solicitors to handle the claim on your behalf.

For guidance on managing difficult client situations before they escalate to formal complaints, our article on handling client complaints professionally covers the practical steps.

The Bottom Line

Professional indemnity insurance isn't the most glamorous aspect of running a business, but it's one of the most important. If your work involves giving advice, creating deliverables, or handling client data, it's either required or strongly advisable. The cost is modest compared to the protection it provides, and it's a legitimate, tax-deductible business expense.

Take the time to find the right policy for your needs, read the small print, and keep your insurer informed. It's one of those things you hope you'll never need — but you'll be very glad to have it if you do.

Accounted helps UK sole traders stay on top of their bookkeeping and tax. Start your free 30-day trial at getaccounted.co.uk

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