How much is professional indemnity insurance for web developers?
Reviewed by Matthew Bartlett, Director, Apex Insurance Brokers Limited · Last reviewed 2026-08-05
In short: There is no single price for web developer professional indemnity (PI) insurance. Your premium is calculated from your fee income or turnover, the work you do, the cover limit you choose (commonly £1m, £2m or £5m), your claims history and your client sectors. A small freelancer pays far less than an agency handling large e-commerce contracts.
If you build websites or web applications, professional indemnity is the cover that responds when a client alleges your work caused them a financial loss — a bug that took their store offline, a missed brief, a data-handling error, or an integration that failed at launch. The question every developer asks first is "how much will it cost?" The honest answer is that PI is individually rated, so the useful thing to understand is what moves the price.
What actually drives your premium
Insurers do not pick a number at random. They assess the risk you represent and price accordingly. For web developers, a handful of factors do most of the work.
- Fee income / turnover. This is the single biggest driver. Cover is rated against the revenue your professional work generates, so a sole trader billing modest fees is a very different proposition to an agency turning over several hundred thousand pounds.
- The activities you perform. Static brochure sites carry less exposure than complex, bespoke web applications, payment integrations, SaaS platforms or anything you host and maintain on the client's behalf. Ongoing responsibility raises the risk.
- The cover limit you choose. A £5m limit costs more than £1m. The right level is usually dictated by your contracts and clients, not just preference (more on this below).
- Claims history. A clean record helps. Previous claims or known circumstances that could become claims will be reflected in the price.
- Client sectors. Building for regulated or high-value sectors — finance, healthcare, large e-commerce, the public sector — increases potential loss values and therefore premium.
- Contract terms. Uncapped liability, onerous indemnity clauses or work for clients who impose strict service levels all increase exposure and can affect rating.
Change any one of these and the premium moves. That is why two developers who look similar on paper can be quoted very differently — and why a like-for-like comparison matters more than a headline figure.
Choosing a cover limit: £1m, £2m or £5m
The cover limit — the maximum the policy will pay in a period — is one of the few drivers you actively control. Higher limits cost more but the increase is rarely proportional; doubling the limit does not usually double the premium. The right choice is generally set by what your clients require and the size of the contracts you take on.
| Cover limit | Often suits | Effect on premium |
|---|---|---|
| £1m | Freelancers and smaller studios building sites for small-business clients with modest contract values. | Lowest of the three, all else equal. |
| £2m | Established developers and agencies where clients ask for higher limits in their contracts. | A step up from £1m, usually less than double. |
| £5m | Teams working with enterprise, public sector or large e-commerce clients that mandate substantial cover. | Highest of the three, but priced on your overall risk, not the limit alone. |
Many client and framework contracts specify a minimum PI limit before they will engage you. Check your contracts first — being under-insured for a requirement can cost you the work, and being over-insured wastes money.
Tell us your turnover, the work you do and the limit your clients ask for — we'll do the rest.
Get a PI quote →Why web developers are rated the way they are
PI for developers sits at the higher end of professional risk because software so often sits at the centre of a client's operations. If a site you built processes orders, a defect can translate directly into lost revenue — and the client will look to you to make good. Insurers weigh how central your work is to a client's income, how much you host or maintain after launch, and whether your contracts leave your liability capped or wide open.
Two related covers are worth understanding when comparing quotes, because they change what "PI" actually includes:
- Cyber and data cover. If you store client or end-user data, or manage hosting, a cyber-related loss may fall outside a bare PI wording. Some developer policies bundle elements of this; others need a separate cyber policy.
- Intellectual property and defamation. Web work carries a risk of infringing copyright or trademarks — a stock image, a font, borrowed code. Good developer PI wordings address this; not all do.
This is exactly where the cheapest quote and the right quote can diverge. A low premium on a narrow wording can leave a gap precisely where developers get claims.
How a broker helps you get the right price
Because PI is individually rated, presentation matters. A broker's job is to describe your business accurately and favourably to insurers, then place it where the risk is best understood. In practice, that means:
- Framing your activities properly so you are neither overcharged for risks you don't run nor left with gaps you didn't know about.
- Matching the cover limit to your actual contractual requirements, not a guess.
- Comparing wordings, not just prices — checking that IP, cyber and data exposures are handled the way a web developer needs.
- Access to specialist insurers who understand technology and price it fairly, rather than a generic professional rate.
- Support at claim time, when the value of the right policy is proven.
The result is not always the lowest number on day one — it is the right cover at a fair, defensible price, from an insurer who will stand behind you. You can start a quote online and we'll take it from there.
Common questions
Does a higher cover limit cost proportionally more?
No. Moving from £1m to £2m or £5m increases the premium, but rarely in direct proportion — the limit is only one of several factors, and the biggest driver is usually your fee income.
Will my turnover change my premium each year?
Usually, yes. Because cover is rated against fee income, a growing business tends to see its premium rise as turnover rises. Keep your broker updated so your cover keeps pace with your work.
Is PI a legal requirement for web developers?
There is no general statutory requirement for developers to hold PI. However, most professional contracts and many client frameworks require it before they will engage you, which makes it effectively essential to trade.
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.