Why is professional indemnity insurance so expensive?
Reviewed by Matthew Bartlett, Director, Apex Insurance Brokers Limited · Last reviewed 2026-08-05
PI insurance is one of the few covers where the "product" being insured is your judgement. Unlike a building or a van, the loss is intangible, can surface long after the work is done, and often comes bundled with expensive legal argument about whether you were at fault at all. That uncertainty is exactly what pushes the price up.
Below we explain the market conditions and risk factors that genuinely drive PI premiums, without quoting figures, so you can see what you can and cannot influence.
What PI insurance is actually paying for
A PI policy responds when a third party alleges they suffered a financial loss because of your professional work: negligent advice, an error, an omission, a missed deadline, or a breach of duty. Crucially, it pays two things:
- Damages or settlement if a claim succeeds or is settled.
- Legal defence costs to investigate and fight the allegation, even if you did nothing wrong.
Defence costs are the hidden driver. A claim can be entirely unfounded and still consume significant legal fees before it is dismissed. Insurers price for the reality that they may pay to defend claims that never should have been brought.
The main factors that drive your premium
PI pricing is individual to your business, but the levers insurers pull are consistent. The biggest ones are:
| Factor | Why it moves the price |
|---|---|
| Your profession | Some sectors have a long tail of large, complex claims. The historic claims record of your discipline is a starting point insurers cannot ignore. |
| Fee income / turnover | Higher revenue usually means more clients, more contracts and greater aggregate exposure, so premiums scale with the size of your practice. |
| Indemnity limit | The more cover you buy (for example £1m, £2m or £5m), the more the insurer is potentially on the hook for, and the more it costs. |
| Type of work | High-value contracts, safety-critical design, financial advice and work for large corporates carry bigger potential losses than routine, lower-stakes tasks. |
| Claims history | Past claims or circumstances notified to insurers suggest future risk and typically increase price until they fall away over time. |
| Retroactive cover | PI is usually written on a "claims made" basis, so cover for work done in earlier years adds exposure and cost. |
"Claims made" and the long tail of risk
Most PI policies are arranged on a claims made basis. That means the policy that responds is the one in force when the claim is made against you, not the one in force when you did the work. Because a client might discover a problem years after the event, insurers are effectively pricing for exposure that stretches back over your whole career of covered work.
This is also why you should not simply let PI lapse when you stop trading. If you retire or close the business, run-off cover keeps you protected against late claims relating to past work. That long tail is a genuine cost, not a sales tactic.
Market conditions you cannot control
Part of what you pay reflects the wider insurance market rather than your own risk. PI capacity moves in cycles. When insurers face heavy claims or rising legal costs across a sector, they tighten terms, raise prices and sometimes withdraw from certain professions. When capital is plentiful and claims are calmer, competition returns and pricing softens.
Broader pressures also feed in: the cost of legal representation, a more claims-conscious client base, and complex, high-value contracts that concentrate risk. None of this is within your control, which is why the same business can see its premium shift year to year even with no change to its work.
Not sure whether you're paying for the right cover or simply overpaying? Let us benchmark it for you.
Get a PI quote →Where a broker changes the outcome
Because PI is individually underwritten and heavily influenced by how your risk is presented, a broker earns their place. A strong submission can be the difference between a competitive terms and a decline.
- Presenting your risk properly. Clear detail on your work, controls and client base helps underwriters price you as the business you are, not as a worst-case assumption for your sector.
- Accessing the right markets. We approach insurers with genuine appetite for your profession, rather than whoever an online form happens to reach.
- Sizing the limit sensibly. We check contract requirements and any regulatory or professional-body minimums so you carry an appropriate limit, neither exposed nor over-buying.
- Reading the wording. Exclusions, aggregation clauses and defence-cost treatment vary widely. We compare on cover, not just price.
- Handling claims and renewals. Good notification and negotiation protect your record, which protects your future premium.
The cheapest headline figure is rarely the best value if the wording leaves a gap where you most need cover. Our job is to make sure the money you spend actually responds when a claim lands. Start a quote with Apex and we will do that comparison for you.
Common questions
Can I reduce my PI premium?
Often, yes, without cutting protection. Improving how your risk is documented, evidencing your quality controls and engagement terms, choosing an appropriate limit and maintaining a clean claims record all help. A broker can also test the market at renewal to see whether a different insurer offers better value.
Is a higher indemnity limit always worth it?
Not automatically. The right limit depends on your contract obligations, the potential size of a loss and any minimum set by a regulator or professional body. Carrying too little leaves you exposed; carrying far more than you need adds cost. We help you match the limit to your actual risk.
Why did my premium rise when nothing changed in my business?
PI pricing reflects the wider market as well as your individual risk. If insurers face heavier claims or rising legal costs across your sector, prices can harden for everyone. Reviewing the market at renewal is the best way to check you are still competitively placed.
Apex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority (FRN 724952). This guide is general information, not advice on a specific policy or a substitute for your policy wording.