Every month, people land on your website, struggle to read it or use it, and quietly leave. You never see them in your enquiries, so you never know they were there. Web accessibility is what closes that gap. It means building your site so anyone can use it, whatever their sight, hearing, movement or memory, and it widens the audience your business can reach.
More than one in five people in the UK lives with a disability, and many more face a temporary or situational barrier, like a broken arm or bright sunlight on a phone screen. When your site works for them, it tends to work better for everyone. You get clearer navigation, faster pages and content that is easier to follow.
Since 2015 we have helped over 150 businesses build websites that perform, and accessibility is part of how we do that. This guide explains what web accessibility really involves, where most sites fall short, and the practical steps that make the biggest difference. If you would rather have someone check your site for you, our free website audit is a good place to start.
What web accessibility means for your business
Start with the outcome. An accessible website is one that more of your potential customers can actually use, which means more enquiries from the same traffic. That is the business case in a sentence, and everything below serves it.
Web accessibility is the practice of designing and building a site so that people with disabilities can perceive, understand and act on it. That covers a wide range of needs. Someone with low vision may rely on larger text or a screen reader. Someone who cannot use a mouse may move through your site with a keyboard. Someone with dyslexia benefits from clear language and generous spacing. A customer with a hearing impairment needs captions on your video, not just sound.
These are not edge cases. We once reviewed a site for a local services business whose prices sat in pale grey text on a white background. It looked clean on the designer’s high-end monitor. On an older customer’s phone, in daylight, the prices were almost invisible, and the owner could not work out why quote requests had dropped. A small contrast change brought them back.
The point is that accessibility is rarely about dramatic redesign. It is a series of sensible choices, made early, that stop you turning people away without realising. Get them right, and the same effort improves the experience for every visitor, not only those with a diagnosed need. Next, it helps to understand the four ideas that sit underneath every accessibility guideline.
The four principles behind an accessible website
Most accessibility advice traces back to the Web Content Accessibility Guidelines, known as WCAG. They are built on four principles, often shortened to POUR: perceivable, operable, understandable and robust. You do not need to memorise them, but they are a useful lens for judging your own site.
Perceivable means people can take in your content through more than one sense. Text needs enough contrast to read. Images need a short written description, so a screen reader can describe them. Video needs captions. If information is signalled only by colour, such as a red star meaning required, some people will miss it.
Operable means people can use the site, however they navigate. Every link, button and form should work with a keyboard alone, not just a mouse. Menus should be predictable, and there should be a clear, visible outline showing where you are on the page as you move through it.
Understandable means the content and the journey make sense. Plain language beats jargon. Layouts should stay consistent from page to page, so visitors are not relearning your site each time. Robust means the site holds up across browsers, devices and assistive technologies, which overlaps closely with good responsive design. This is where clean, well-structured code matters, because screen readers depend on it to read your pages correctly.
The current version of the guidelines is WCAG 2.2, published as a recognised web standard in October 2023. A future WCAG 3.0 is in development, but it is years from being finished, so 2.2 is what you should design to today. Treat these four principles as a checklist for instinct, then look at the specific areas where sites most often slip.
Where most websites fall short
If you want quick wins, this is where they live. A handful of common web design mistakes account for most of the barriers we find when we audit a site.
Structure and clean code
Behind every page is its underlying code, and accessible sites use the right HTML element for the job. A heading marked up as a heading, a button built as a button, a list structured as a list. This is called semantic HTML, and it lets screen readers announce your content in a logical order. Where standard elements are not enough, such as a custom slider or a pop-up, ARIA attributes can fill the gap and describe what each part does. Overusing ARIA causes more problems than it solves, so the rule of thumb is to reach for proper HTML first.
Keyboard and focus
Try this on your own site. Put the mouse aside and move through a page using only the Tab key. Can you reach every link, button and form field, and can you always see where you are? Many sites fail this test, especially in menus, pop-ups and contact forms. A visible focus outline and a logical tab order are small details that separate a usable site from a frustrating one for anyone who cannot use a mouse.
Get more from the visitors you already have
Seven quick wins you can make this week to turn more of them into enquiries.
Colour, contrast and type
Colour and typography carry a lot of weight. Text needs to stand out clearly from its background, which the guidelines define with specific contrast ratios. Body text should be comfortably sized and easy to scan, and colour should never be the only way you signal something important. A link shown only by a slightly different shade, with no underline, will be missed by colour-blind readers.
Images, video and audio
Finally, give your media a text alternative. Every meaningful image needs alt text, a short description that a screen reader can read aloud. Videos need captions, and ideally a transcript, so people who cannot hear the audio still get the message. None of this takes long once it becomes habit, and it doubles as useful content that search engines can read too. Fixing these basics improves the experience for everyone, and it happens to unlock three commercial benefits worth spelling out.
Three reasons accessibility is good for business
A wider audience
The most obvious benefit is reach. When your site works for people with disabilities, you stop excluding a large slice of the market. Millions of people in the UK live with a disability, and that is before you count older customers, people on slow connections and anyone using a phone in awkward conditions. Every barrier you remove is a potential customer you keep.
Better search rankings
Accessibility and SEO pull in the same direction. The things that help screen readers, such as proper headings, descriptive alt text and clean structure, are the same things that help Google understand and rank your pages. Clear, well-organised content tends to perform better in search, so the work you do for accessibility supports your visibility at the same time.
Lower legal risk
There is a legal dimension too, and it is worth understanding rather than fearing. In the UK, the Equality Act 2010 requires businesses to make reasonable adjustments so disabled people are not put at a substantial disadvantage, and that duty applies to your website as much as your premises. There is no fixed fine, but you can face complaints, claims and reputational damage if your site shuts people out.
If you sell to customers in the EU, there is a newer rule to know about. The European Accessibility Act took effect on 28 June 2025 and applies to UK businesses that provide products or services to EU consumers, such as an online shop that ships to Europe. It sets clear accessibility requirements based on the recognised WCAG standard. If you only trade within the UK it does not apply to you, which is exactly the kind of detail worth checking rather than assuming.
One word of caution. You may have seen plug-in tools that promise instant compliance from a single line of code. They can help in places, but they do not make a site genuinely accessible, and leaning on them alone can leave the real barriers in place. The dependable route is to build accessibility in from the start, as part of how your website is designed and built. So how do you know where your own site stands today?
How to check and maintain web accessibility
You can get a useful first read in an afternoon. Free tools such as WAVE and the Lighthouse report built into Chrome will scan a page and flag common issues, from low contrast to missing alt text. They are a sensible starting point, and they cost nothing.
Automated tools only catch part of the picture though. They tend to find somewhere between a third and a half of real issues, so the rest needs a human. The good news is that the most revealing checks are simple. Move through your key pages with the keyboard alone, as described earlier. Turn on a screen reader and listen to how your homepage and contact page are read out. Try your site on a phone in bright light. These quick tests surface the barriers that scanners miss.
Accessibility is not a one-off task either. Every time you add a page, a form or a video, you can introduce a new barrier, so it pays to make these checks part of how you run the site rather than a project you finish once. A short routine each month keeps standards from slipping.
If that sounds like time you do not have, this is the sort of thing we handle for clients as part of looking after their websites, alongside speed, security and steady improvements. The aim stays the same throughout: a site that works for as many people as possible, so more of your visitors become enquiries.
Bringing it all together
Web accessibility is not a box to tick or a cost to dread. It is a practical way to make your website work harder, reaching more people, reading better to search engines and keeping you on the right side of the law. The best part is that most of it is ordinary good design, done with a little more care.
You do not need to fix everything at once. A sensible order looks like this:
- Run a free scan with WAVE or Lighthouse on your most important pages.
- Check those same pages work using only a keyboard.
- Fix the quick wins first, starting with contrast and missing alt text.
- Build a short accessibility check into your monthly site routine.
Start with one page, learn what to look for, and the rest follows. If you would like an expert pair of eyes, our free website audit will show you where your site stands and what to prioritise, with no obligation. Make your site easier to use, and you make it easier to buy from.
