Cambria Digital
- What is a UX Audit, Exactly?
- UX Audit vs Heuristic Evaluation vs CRO Audit
- Signs Your Site Needs a UX Audit
- What a Proper UX Audit Includes
- The UX Audit Process Step by Step
- How Much a UX Audit Costs in the UK
- The 20-Point DIY UX Audit Checklist
- Free UX Audit Tools UK Teams Use
- Can AI Run a UX Audit?
- When NOT to Commission a UX Audit
- Frequently Asked Questions
What is a UX Audit, Exactly?
A UX audit is a structured review of your website or app that identifies friction points hurting conversion, accessibility, and user trust. It combines a heuristic review against proven usability principles, an accessibility check against WCAG 2.1 AA, analytics and funnel analysis, and competitor benchmarking. The output is a prioritised fix list ranked by effort and revenue impact, delivered as a written report in 3 to 10 working days.
This guide does three things most UK UX audit content skips. It explains the exact differences between a UX audit, a heuristic evaluation, and a CRO audit — three terms agencies use interchangeably and that cost you thousands when confused. It ends with a 20-point DIY audit you can score against your own site in 30 minutes. And it gives the free tool stack UK teams actually use, with the UK-specific accessibility law angle most international articles miss.
A Cardiff SaaS founder once emailed us after a six-month paid acquisition campaign that tripled traffic but halved conversion rate. She did not need a redesign. She needed to know why her new visitors kept bouncing. A £1,500 UX audit found the cause in four days: an accessibility-broken signup form that Safari 17 had started rejecting after an iOS update. A three-line fix recovered her conversion rate overnight. The audit paid for itself in the first week.
Who Needs One and When
A UX audit fits businesses that have a live site or app, some analytics data to work with, and a sense that conversion or engagement is underperforming. Teams that are still pre-launch cannot run a UX audit — they need user research and wireframing instead. Teams planning a full rebrand or migration to a new platform do not need a UX audit first — that is a different project. Everyone in between, especially UK SMBs with sites that have grown organically over years, sits in the audit sweet spot.
UX Audit vs Heuristic Evaluation vs CRO Audit
UK agencies use these three terms as if they mean the same thing. They do not. Buying the wrong one costs you time and rebuilds when the report fails to answer the question you actually had.
| What it is | Focus | Based on | Use when | UK typical cost |
|---|---|---|---|---|
| Heuristic evaluation | Expert review against usability principles | Nielsen's 10 heuristics, Fitts's law | You want a quick expert opinion, limited budget, no analytics data | £800 – £2,000 |
| UX audit | Holistic usability, accessibility, flow and analytics review | Heuristics + WCAG 2.1 + your real user data + competitor benchmarks | You have live traffic, conversion is underperforming, you need a prioritised fix list | £1,500 – £6,500 |
| CRO audit | Conversion rate and funnel optimisation | A/B-test history, heatmaps, revenue data | Your site converts but you want to push from 2% to 4% | £2,000 – £8,000 |
Most UK SMBs need a UX audit, not the other two. A heuristic evaluation is too narrow — it tells you what a usability expert thinks, not what your real users actually do. A CRO audit is too narrow in the other direction — it optimises existing flow without questioning whether the flow itself is right. A UX audit sits in the middle and is the right tool for most businesses under £5 million in annual revenue.
Signs Your Site Needs a UX Audit
Six signs that point to a UX audit as the right next step rather than a full rebuild or a set of point fixes.
- High bounce rate with no obvious cause — over 70% on landing pages that are on-topic for their traffic source and have decent Core Web Vitals scores.
- Conversion rate below industry benchmark — below 2% for most B2C, below 1% for B2B service sites, despite running relevant ad traffic or ranking well organically.
- Support volume spiking on the same 5 issues — the same questions arrive every week. That pattern means the interface is unclear, not the users.
- A recent redesign that hurt numbers — rebuilds sometimes win on aesthetics and lose on usability. An audit isolates which design decisions are actively costing you revenue.
- Accessibility risk — you received an accessibility complaint, or your legal team flagged UK Equality Act 2010 exposure on digital products.
- Mobile performance versus desktop — conversion rates on mobile fall 50%+ below desktop even though mobile is 60%+ of traffic. Almost always a UX issue, not a pricing issue.
What a Proper UX Audit Includes
Five layers that the best UK audits cover. A cheap audit covers only the first. A premium audit spans all five.
Heuristic Review Against Established Principles
A UX expert walks through every core user journey against Nielsen's 10 usability heuristics, Jakob's Law of internet user expectation, and established UK industry conventions. The output flags every violation with a screenshot, severity rating, and recommended fix. Heuristic review alone catches 60% to 80% of the usability issues the audit will eventually surface.
Accessibility Check Against WCAG 2.1 AA
WCAG 2.1 AA is the minimum legal standard for digital products serving UK users, required under the Equality Act 2010 and the Public Sector Bodies Accessibility Regulations 2018 for public-sector work. A proper audit uses axe DevTools and manual checks to find colour-contrast failures, missing alt text, keyboard-trap focus issues, screen-reader labels, and form-field accessibility gaps. Privately-held SMBs are not in the public-sector remit but face EQA 2010 claims when users with disabilities cannot access their services.
Analytics and Funnel Analysis
Raw usability review without analytics data misses the biggest wins. The audit pulls 3 to 12 months of GA4 data, identifies where the highest-traffic pages have the biggest drop-offs, and correlates the behavioural signal with the heuristic findings. This is the layer that turns "these buttons should be bigger" into "fixing this specific step will recover 12% of lost signups".
User-Flow Mapping
The auditor maps the actual paths users take from entry to conversion, then compares those paths to the paths the business intended. Gaps between intended flow and actual flow are high-leverage fixes because they point to assumptions that the design imposed on users but users never adopted.
Competitor Benchmarking
Not what competitors look like — what they do. The audit identifies 3 direct UK competitors, runs them through the same heuristic checks, and calls out where your site lags or leads on specific UX patterns your users already know from those sites. This is the information-gain layer: most audits skip it because it requires extra hours, but clients quote it to their team long after the report lands.
The UX Audit Process Step by Step
What a proper 5-day UX audit actually looks like at Cambria Digital. Different agencies vary the order, but the components should all be there.
| Day | Activity | Output |
|---|---|---|
| Day 1 | Kick-off call, GA4 access, goal clarification, competitor list agreement | Scope document + access checklist |
| Day 2 | Heuristic review of 5 to 10 core pages, screen recording of every journey | Annotated screenshots with severity ratings |
| Day 3 | Accessibility scan with axe DevTools + manual keyboard and screen-reader checks | WCAG 2.1 AA compliance report |
| Day 4 | Analytics funnel analysis + competitor benchmarking | Drop-off map + competitor gap list |
| Day 5 | Findings synthesis + prioritised fix list + Loom walkthrough recording | Written report PDF + 20-minute video walkthrough |
Pro tip: Insist on a Loom walkthrough of the report, not just a written deliverable. A 20-minute recording of the auditor narrating the fix list is worth more than any 40-page PDF. Your team can watch it together, pause, ask questions, and build shared understanding. The written PDF is a reference document; the video is the briefing.
How Much a UX Audit Costs in the UK
UK UX audit pricing in 2026 sits in three tiers, with significant regional variation between London and the rest of the country.
| Tier | UK Price | Scope | Duration |
|---|---|---|---|
| Basic heuristic audit | £800 – £1,500 | Expert review only, no analytics, 3 to 5 pages | 2–4 days |
| Standard UX audit | £1,500 – £3,000 | Full 5-layer audit, up to 10 pages, accessibility included | 5–10 working days |
| Enterprise or complex audit | £3,000 – £8,000 | Multi-language sites, SaaS apps, transactional flows, 20+ screens | 2–4 weeks |
At Cambria Digital our UX Audit tier is fixed at £1,500 and covers a 5-day heuristic and accessibility review with analytics and competitor benchmarking, delivered as a written PDF report plus a Loom walkthrough. London agencies typically charge £2,500 to £4,000 for the equivalent — same output, higher overheads. As a Cardiff-based studio we offer London-quality audit work at regional rates.
What Reputable UK Agencies Charge Is Rarely the Same
The floor below £800 usually signals a cursory five-page review, often outsourced overseas with limited understanding of UK context. Above £5,000 for a single-site audit without specific complexity reasons (multi-language, SaaS with hundreds of screens, transactional compliance) usually means the agency is padding. Anything quoted as "from £X" without a scope document is a red flag — the final invoice often lands at 2x the quoted floor.
The 20-Point DIY UX Audit Checklist
Score your own site out of 20 before you commission a paid audit. A score of 16 or higher means you probably do not need one. A score of 10 to 15 means a UX audit will find 3 to 5 high-impact fixes. Below 10 means the whole site needs structural work, not just an audit.
- Every page has one clear, visible primary call to action above the fold on mobile.
- The main navigation has 7 or fewer top-level items.
- Every form shows inline error messages, not a summary at the top after submit.
- Search functionality exists on sites with more than 30 content pages.
- All interactive elements are at least 44 by 44 pixels on touch devices.
- Colour contrast for body text meets WCAG 2.1 AA (4.5:1 minimum).
- Alt text exists on every meaningful image (decorative images have empty alt).
- Keyboard-only navigation reaches every interactive element without a trap.
- The site is screen-reader usable with NVDA or VoiceOver.
- Heading hierarchy runs H1 then H2 then H3 without skipping levels.
- Error pages (404, 500) help the user find their way back, not just apologise.
- Checkout or signup flows show progress indicators (steps 1 of 3 and so on).
- The site works identically on Safari, Chrome, Firefox, and Edge.
- Mobile sticky elements (headers, call-to-action bars) do not cover critical content.
- Loading states exist on every action that takes longer than 400 milliseconds.
- The privacy policy and cookie banner appear before any analytics cookies fire.
- Contact information is accessible within 2 clicks from every page.
- Phone numbers and email addresses are clickable (tel: and mailto:).
- Forms pre-fill known data (email, name) when users are logged in or returning.
- Confirmation messages appear after every successful action, not just page reload.
Work through honestly. The hardest thing about this checklist is resisting the urge to grade generously. If in doubt, mark No — every No that turns into a Yes recovers real revenue.
Free UX Audit Tools UK Teams Use
You do not need a £5,000 tool stack to run a decent audit. Here are the tools Cambria Digital uses alongside paid subscriptions, and every one has a free tier that covers most SMB sites.
- axe DevTools — Chrome and Firefox extension for WCAG accessibility scanning. Free tier covers automated checks; manual testing remains the expert layer.
- Lighthouse — built into Chrome DevTools. Scores performance, accessibility, SEO, and best practices. Worth running on every page.
- Microsoft Clarity — free session-recording tool with heatmaps and rage-click detection. No usage cap. Rival to Hotjar (paid) for most UK SMB needs.
- Hotjar — 35 daily session recordings free. Better interface than Clarity for first-time auditors. Step up to paid plan at 100+ recordings a day.
- Maze — unmoderated user-testing platform with a free starter tier. Five-test limit is enough for most single-page audits.
- Figma — free personal tier covers annotation and audit-report creation. Also integrates with axe for design-time accessibility checking.
- WAVE — WebAIM's web accessibility evaluation tool. Free browser extension. Simpler than axe, often catches a few things axe misses.
- GA4 — already free, under-used. Enhanced measurement and custom funnels cover 80% of what paid analytics tools do.
This stack replicates maybe 75% of what Nielsen Norman Group or Baymard charge £10,000+ for. The missing 25% is the trained expert interpretation, which is what you pay an agency for when you commission a paid audit.
Can AI Run a UX Audit?
Partly. AI tools like UX Audit AI and ChatGPT with vision can scan screenshots and flag obvious usability issues. Useful for a first pass. What AI still cannot do well in 2026 is interpret analytics data in the context of your business model, benchmark your site against three specific UK competitors in your sector, and prioritise fixes by revenue impact rather than generic severity. Those three layers are where a human auditor earns the £1,500 fee.
Expect AI to handle more of the first pass over the next 2 to 3 years. Expect human auditors to keep the diagnostic, strategic, and prioritisation work indefinitely. The right way to use AI today is as a force multiplier on the heuristic-review layer so the human auditor spends time on the analytical work instead of manual checklist-ticking.
A Leeds ecommerce client paid a London agency £4,800 for a UX audit that found 47 issues. The report read like a usability textbook. We rebuilt the audit for the same client 9 months later for £1,500 and found 8 issues — the same 8 that mattered, stripped of the 39 that did not. Six weeks after implementing the 8 fixes, conversion rate climbed 31%. The lesson is that an expensive audit with a long list is not a better audit. A shorter audit that tells you which 5 fixes will move the needle is worth 5x the one that lists 40.
When NOT to Commission a UX Audit
Honest counter-advice. An audit is the wrong tool for three situations we see weekly at Cambria Digital.
Your Site Has Less Than 1,000 Monthly Users
A UX audit depends on real user data. Below 1,000 monthly users you do not have a statistically meaningful sample. Spend the £1,500 on paid traffic or user research instead — both will produce more actionable learnings at low user volume.
You Are Already Committed to a Rebuild
Do not commission an audit of a site you are replacing next quarter. The audit's prioritised fix list will identify changes you will not make because the rebuild will change them anyway. Spend the budget on user research feeding the new design instead.
The Problem Is Your Product, Not Your Interface
If customers repeatedly tell your sales team that your service is too expensive or not a fit for their needs, that is a product-market fit problem, not a UX problem. No amount of UX audit will fix pricing mismatch. Invest in customer discovery interviews before a UX review.
Common UX Audit Mistakes UK Buyers Make
- Buying the cheapest tier — a £300 Fiverr heuristic review catches surface issues and misses the analytics-driven wins that pay for the audit.
- Not sharing GA4 access — an auditor without data produces half an audit. Always provide read-only GA4 access at kickoff.
- Skipping accessibility — UK EQA 2010 creates real legal exposure on digital services; accessibility findings are not optional nice-to-haves.
- Sitting on the report — the audit value comes from implementation. An unacted-on report is a £1,500 filing cabinet filler.
- Confusing UX audit with rebrand — the audit fixes structural issues; it is not a visual refresh or a logo change.
- Expecting fixed-price implementation — the audit quotes fixes by effort. Actual implementation cost depends on your tech stack.
- Ignoring competitor benchmarking — a UK-only audit that does not reference 3 direct competitors misses context that shapes which fixes matter most.
- Accepting a PDF without a video walkthrough — insist on a Loom; the PDF alone leaves half the insight with the auditor's head.
8 Frequently Asked Questions
A UX audit is a structured review of your website or app by a user-experience expert that identifies friction points hurting conversion, accessibility, and user trust. A full audit combines a heuristic review against proven usability principles, an accessibility check against WCAG 2.1 AA, analytics and funnel analysis using your real user data, user-flow mapping, and benchmarking against 3 direct competitors. The output is a prioritised fix list ranked by effort and revenue impact, delivered as a written PDF report plus a video walkthrough.
A standard UK UX audit runs 5 working days from kickoff to report delivery. Complex audits with multi-language sites, SaaS applications with hundreds of screens, or transactional compliance requirements take 10 to 20 working days. A quick heuristic review without analytics or accessibility layers runs 2 to 4 days. Turnaround depends on scope and how quickly you provide access to Google Analytics, site admin, and a list of 3 direct competitors for benchmarking.
UK UX audit pricing in 2026 ranges from £800 to £8,000 depending on scope. A basic heuristic review costs £800 to £1,500. A standard 5-layer UX audit with accessibility and analytics costs £1,500 to £3,000. Enterprise audits for multi-language sites, SaaS apps, or transactional flows cost £3,000 to £8,000. London agencies typically charge 30 to 50 percent more than regional UK studios. At Cambria Digital our UX Audit tier is fixed at £1,500 and covers a full 5-day review with accessibility, analytics, and competitor benchmarking. All prices exclude VAT.
A proper UX audit follows five layers. Day 1 covers kickoff, GA4 access, goal clarification, and agreement on 3 competitors to benchmark against. Day 2 is heuristic review of 5 to 10 core pages, annotated with severity ratings. Day 3 is an accessibility scan against WCAG 2.1 AA using axe DevTools plus manual keyboard and screen-reader checks. Day 4 is analytics funnel analysis against 3 to 12 months of GA4 data plus competitor benchmarking. Day 5 is findings synthesis into a prioritised fix list, delivered as a written PDF report plus a 20-minute Loom video walkthrough.
A heuristic evaluation is one layer of a UX audit, not the whole thing. Heuristic evaluation applies established usability principles like Nielsen's 10 heuristics to find obvious issues and typically costs £800 to £2,000 in the UK. A full UX audit includes heuristic evaluation plus accessibility against WCAG 2.1 AA, analytics and funnel analysis using your real user data, user-flow mapping, and competitor benchmarking. The full audit costs £1,500 to £3,000 and delivers 3 to 5 times more actionable findings because it grounds expert opinion in real user behaviour.
Start with a UX audit unless your site already fails 3 or more of these: broken on modern mobile browsers, no content management system, visual identity 5+ years out of date, brand name or business model has changed. A UX audit costs £1,500 and finds 5 to 10 fixes that recover 15 to 40 percent of lost conversions. A full redesign costs £8,000 to £30,000 and takes 3 to 6 months. The audit tells you whether the redesign is necessary. If the audit finds that 3 quick fixes recover your conversion rate, the redesign becomes optional. If the audit finds structural issues that cannot be patched, the redesign is justified.
Partly. AI tools such as ChatGPT with vision and dedicated products like UX Audit AI can scan screenshots, flag obvious usability and accessibility issues, and draft heuristic findings. This handles maybe 40 percent of the heuristic-review layer. What AI cannot do reliably in 2026 is interpret your analytics data in the context of your specific business model, benchmark against 3 named UK competitors with cultural nuance, or prioritise fixes by revenue impact rather than generic severity scores. Those are the layers where a human auditor earns the £1,500 fee. The right approach is using AI to speed up the manual-checklist layer so the human auditor spends more time on the strategic work.
Once every 18 to 24 months for most UK SMBs. More often if you push a major feature release, migrate platforms, or see a 20 percent or more drop in conversion rate. Less often if your site stays stable, your analytics show consistent performance, and no new competitors have launched in your space. A UX audit is not an annual ritual; it is a diagnostic tool. Run one when a symptom appears that points to user-experience as a likely cause. Running audits quarterly is usually a sign of over-indexing on UX when the actual problem sits elsewhere in the business.
Ready to commission a UX audit? Our Cardiff team delivers a full 5-day audit for a fixed £1,500, no scope creep, no surprise invoices. You get a written PDF report, a 20-minute Loom video walkthrough, a prioritised fix list ranked by revenue impact, and a free 30-minute follow-up call once you have read the report. Book your free discovery call or see the full UI/UX Design service page for inclusions and tier details.