What is a website audit?
A website audit is a structured review of how well your site does its job: loading quickly, being found in search, being usable on every device, and turning visitors into enquiries. The website audit cost question comes up early for most UK business owners because the market is confusing on purpose: the same word covers a sixty-second automated scan and a three-week agency engagement, and the price difference between them is several thousand pounds.
The confusion clears up once you separate what is being measured from what is being judged. Machines measure. Speed scores, broken links, missing page titles, and accessibility flags can all be collected automatically, at no cost, in about the time it takes to make tea. Judgement is the human layer on top: which of the two hundred flagged items actually costs you money, what caused it, and what order to fix things in. Every honest audit price on the market is really a price for judgement, because the measurement part is now free for everyone.
How much does a website audit cost across the UK market?
There is no fixed rate card, and any figure below should be read as a typical market range rather than a quote. Prices vary with site size, sector, and how much of the work is genuinely manual. That said, audits sold in the UK cluster into four recognisable levels, and knowing the shape of each one protects you from paying agency prices for automated output.
| Audit level | Typical UK range | What it usually covers | Best suited to |
|---|---|---|---|
| Free automated tools | £0 | Speed, Core Web Vitals, basic SEO flags, accessibility checks | A first look and a baseline score |
| Freelancer audit | £150 to £1,500 | One specialist lens: usually SEO, UX, or performance, with a written report | Small sites with one suspected problem |
| Agency audit | £1,500 to £5,000+ | Technical, content, UX, and conversion reviewed together, with a prioritised plan | Sites that are the main source of enquiries |
| Enterprise / specialist | £5,000 to £25,000+ | Large or regulated sites: crawl analysis at scale, accessibility compliance, migration planning | Big estates, high-stakes migrations |
Two things are worth noticing about that table. First, the ranges overlap, because a senior freelancer with deep experience often delivers more value than a junior-staffed agency at twice the price. Second, the jump from free to paid is not a jump in data. It is a jump from "here are your scores" to "here is what your scores mean and what to do about them", and that is the only jump worth paying for.
Free automated website checks: what £0 genuinely buys
Free tools are better than their price suggests. Google's own PageSpeed Insights measures your pages against the published Core Web Vitals thresholds using both lab tests and real-user data, and it costs nothing. Search Console reports indexing problems straight from Google. Accessibility checkers flag missing alt text and contrast failures reliably. If you have never audited your site at all, an hour with free tools will surface real problems.
What free tools cannot do is prioritise or explain. They will happily hand you two hundred findings of equal apparent urgency, including many that do not matter for your business at all. They cannot see that your enquiry form asks for too much, that your homepage takes four paragraphs to say what you do, or that your proof is anonymous and therefore worthless. Those are judgement calls, and they are usually where the money leaks. Our own free scored CRISP audit sits at this level with one difference: it grades the specific jobs a page can fail at, so the output is a starting point for decisions rather than a wall of flags.
Freelancer website reviews: £150 to £1,500
A freelancer audit buys you one experienced pair of eyes applying one lens, and at its best it is excellent value. An SEO specialist will crawl the site, read the search data, and tell you why visibility is falling. A UX reviewer will walk your enquiry journey the way a stranger would, in the spirit of the usability heuristics Nielsen Norman Group has published for decades, and point at the exact steps where people give up.
The limitation is the lens itself. A site that loads slowly, ranks poorly, and converts badly usually has causes that cross disciplines, and a single-specialism review can only see its own slice. The practical rule: hire a freelancer audit when you already know roughly which discipline the problem lives in, and be honest with yourself about how you know that. If the answer is "I am guessing", a broader review, or at least a free scored baseline first, is the safer spend.
Agency website audits: £1,500 to £5,000 and up
An agency audit should cover the full chain: can people find the site, does it load properly when they do, can they use it, do they trust it, and does it ask clearly for the enquiry. The deliverable that justifies the price is not the findings document. It is the prioritised plan: a short, ordered list of what to fix first and why, with the reasoning shown. Our website audit service is built around exactly that principle, and our pricing page sets out what we charge for the paid work rather than burying it in a proposal.
At this level you should also expect the audit to check your site against Google's own published guidance, such as the SEO starter guide, rather than against the auditor's private opinions. Ask any agency two questions before committing: what proportion of the report is written specifically about my pages, and who do I talk to when I have questions afterwards. Vague answers to either are a signal to keep looking.
Why cheap paid audits are often re-skinned Lighthouse reports
Here is the uncomfortable mechanics of the low end of the market. Lighthouse, the open-source engine behind PageSpeed Insights, produces a detailed, professional-looking report for any URL, free, in under a minute. A cottage industry exists that runs that report, drops the output into a branded template, and sells it for £99 to £500 as a "comprehensive website audit". The findings are real, but you have paid a few hundred pounds for formatting.
The tell is specificity. Automated output speaks in generalities: "reduce unused JavaScript", "images not sized correctly", "links do not have descriptive text". A human audit speaks in particulars: which page, which image, what it costs you, what to do about it, in what order. Before paying for any cheap audit, run PageSpeed Insights and our free CRISP audit on your own site first. If the paid report tells you nothing beyond what those two just told you for free, you have your answer about what it was worth. Our website audit checklist walks through the full set of checks so you can see exactly what a thorough review covers, and judge any paid offer against it.
When a paid website audit is worth the money
A paid audit earns its fee in three situations. First, when the site matters and the cause is unclear: enquiries have fallen, or never arrived, and you have already established with free tools that there is no single obvious culprit. Second, before a major spend: if you are about to pay for a rebuild, a migration, or a serious advertising budget, an audit that costs two per cent of the project and prevents one wrong decision is cheap. Third, when you need an independent referee: an audit from someone who is not selling you the fix is the honest way to test what your current supplier is telling you.
Flip those around and you get the situations where paying is premature. If you have never run the free tools, run them first. If you already know the problem, spend the money fixing it instead. And if a seller's audit is free only as a doorway to their quote, read it as marketing with useful data in it, which is what it is. We are upfront that our free audit works that way too: it gives you a genuine scored result you can act on with anyone, and if the findings justify deeper work, that is a separate conversation with its own published pricing.
One last piece of buying advice: judge an audit by the decisions it enables, not by its page count. A forty-page document you never act on is worth less than one page that correctly tells you the three things to fix this quarter. The right question before paying is not "how much does the audit cost?" but "what decision am I trying to make, and will this audit make it for me?". If the seller cannot answer that, the price does not matter.
Frequently asked questions
How much should I pay for a website audit in the UK?
It depends on what is at stake. If the website supports a small share of your revenue, a free automated audit plus a few hundred pounds of specialist review is usually proportionate. If the site is your main source of enquiries, agency audits in the low thousands are common across the UK market. The fee should always be small relative to the cost of the problem you suspect.
Are free website audits any good?
Free audits are good at finding symptoms and poor at explaining causes. Automated tools measure speed, flag technical errors, and score accessibility reliably, and that is genuinely useful as a starting point. What they cannot do is tell you which finding matters for your business, what caused it, or what to fix first. Treat a free audit as a thermometer, not a diagnosis.
What should a paid website audit include?
At minimum: findings specific to your pages rather than generic advice, a clear explanation of what each problem costs you in plain language, a prioritised list of fixes ordered by impact and effort, and a named person who will answer questions about it afterwards. If the deliverable is a PDF of tool output with a logo on it, you have paid for something you could have generated yourself.
How long does a professional website audit take?
Automated audits run in seconds to minutes. A freelancer review of a small site typically takes a few days from start to delivered report. Agency audits covering technical, content, and conversion questions commonly take one to three weeks across the UK market, depending on site size and how much access they are given. Be wary of a same-day turnaround on a paid audit of any depth.