A few years ago, we launched a website for a client that we were genuinely proud of. The design was sharp, the animations were smooth, the copy was tight. We got compliments from everyone who saw it. And then, about two weeks after launch, the client forwarded us an email from one of their customers. A visually impaired user who relied on a screen reader had tried to use the site and couldn’t navigate it at all.
The navigation had no proper ARIA labels. The images had no alt text. The “beautiful” custom dropdown menus were completely invisible to assistive technology. The contact form had placeholder text instead of actual labels, so the screen reader couldn’t tell the user what information to enter. This person—a real customer who wanted to do business with our client—was effectively locked out of the website we’d built.
That email changed how I think about web development. It wasn’t just a technical oversight. It was a failure to consider that not everyone experiences the web the same way I do. Since then, accessibility has been a non-negotiable part of every project we take on. And I’m writing this guide because I think every business owner should understand what web accessibility means, why it matters, and what practical steps you can take to make your site work for everyone.
What Web Accessibility Actually Means
Web accessibility means designing and building websites that people with disabilities can perceive, understand, navigate, and interact with. That includes people who are blind or have low vision, people who are deaf or hard of hearing, people with motor disabilities who can’t use a mouse, people with cognitive disabilities, and people with temporary impairments like a broken arm or situational limitations like using a phone in bright sunlight.
The number of people this affects is much larger than most business owners realize. According to the World Health Organization, roughly 16% of the global population lives with some form of disability. In most countries, that’s your second or third largest demographic group. If your website isn’t accessible, you’re telling a significant portion of your potential customers that you don’t want their business.
But accessibility isn’t just about permanent disabilities. Think about temporary situations: someone recovering from eye surgery who needs to increase text size, someone with a broken wrist who can’t use a mouse, someone in a noisy environment who needs captions on a video. Accessibility improvements help everyone, not just people with diagnosed disabilities.
The Legal Landscape
Beyond the moral argument, there are increasingly strong legal reasons to care about web accessibility.
ADA (United States)
The Americans with Disabilities Act doesn’t specifically mention websites, but courts have consistently ruled that it applies to digital spaces. Web accessibility lawsuits in the US have been rising sharply—thousands are filed every year, targeting businesses of all sizes. The settlements and legal fees can be significant, often ranging from $10,000 to $150,000 or more.
European Accessibility Act (EU)
The EAA requires digital products and services to meet accessibility standards. This applies to e-commerce sites, banking services, transport services, and many other digital businesses operating in the EU. Non-compliance can result in fines and being barred from operating in EU markets.
Other Regulations
Canada’s Accessible Canada Act, Australia’s Disability Discrimination Act, the UK’s Equality Act, and similar legislation in dozens of other countries all have provisions that can be applied to website accessibility. The global trend is clear: digital accessibility is becoming a legal requirement, not just a best practice.
Even if you operate in a region without specific web accessibility laws today, it’s only a matter of time. Building accessibly now is cheaper and easier than retrofitting later under legal pressure.
Understanding WCAG: The Accessibility Standard
The Web Content Accessibility Guidelines (WCAG) are the internationally recognized standard for web accessibility. Published by the W3C (the organization that sets web standards), WCAG provides a comprehensive framework for making web content accessible. The current version is WCAG 2.1, with WCAG 2.2 adding additional criteria.
WCAG is organized around four principles, often remembered by the acronym POUR:
Perceivable
Users must be able to perceive the information on your website. This means providing text alternatives for images, captions for videos, and ensuring content can be presented in different ways (like through a screen reader) without losing meaning. If your content relies on a single sense—like seeing an image or hearing audio—you need to provide alternatives for people who can’t use that sense.
Operable
Users must be able to operate the interface. All functionality must be available via keyboard (not just mouse). Users need enough time to read and interact with content. Nothing should cause seizures (no rapidly flashing elements). And users need to be able to navigate, find content, and determine where they are on the site.
Understandable
Users must be able to understand the information and how to use the interface. Text should be readable and predictable. Navigation should be consistent across pages. Error messages should be helpful and specific. The site shouldn’t behave in unexpected ways.
Robust
Content must be robust enough to be interpreted reliably by a wide variety of user agents, including assistive technologies. This means using valid, semantic HTML and following web standards so that screen readers, voice control software, and other tools can properly parse your content.
WCAG has three conformance levels: A (minimum), AA (standard), and AAA (highest). Most legal requirements and industry standards call for Level AA compliance. That’s the target I recommend for all business websites.
Practical Fixes: Where to Start
Theory is great, but you want to know what to actually do. Here are the highest-impact accessibility improvements you can make, starting with the easiest.
Add Alt Text to Every Image
Every <img> element needs an alt attribute that describes what the image shows. This isn’t just for screen readers—it also displays when images fail to load and helps search engines understand your content (so it’s good for web design and SEO too).
Good alt text is concise and descriptive: “Team of designers reviewing wireframes on a whiteboard” is much better than “image” or “photo.jpg” or leaving it blank. For decorative images that don’t convey information (like background patterns), use an empty alt attribute (alt="") so screen readers skip them.
Ensure Sufficient Color Contrast
Text must have enough contrast against its background to be readable by people with low vision or color blindness. WCAG AA requires a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text (18px bold or 24px regular).
The most common violation I see is light gray text on a white background. It might look “elegant” to designers, but it’s unreadable for millions of people. Use a contrast checker tool (WebAIM’s contrast checker is free and easy) to verify your color combinations. This is one of the simplest fixes with one of the biggest impacts.
Make Everything Keyboard Accessible
Try navigating your entire website using only the Tab key, Enter key, and arrow keys. Can you reach every link, button, and form field? Can you tell which element is currently focused? Can you open dropdown menus and close modal dialogs?
If the answer to any of those is no, you have a keyboard accessibility problem. The most common culprits are custom JavaScript components (menus, modals, sliders) that were built without keyboard support, and focus styles that have been removed for “aesthetic” reasons.
Never remove the browser’s default focus outline without replacing it with something equally visible. That blue or dotted outline around focused elements isn’t a bug—it’s how keyboard users know where they are on the page.
Use Semantic HTML
Semantic HTML means using the right HTML element for the right purpose. Use <nav> for navigation, <header> for headers, <main> for main content, <button> for buttons, <a> for links, and proper heading levels (<h1> through <h6>) in order.
A disturbingly common pattern is using a <div> with a click handler instead of a <button>. To a sighted user, it might look the same. But to a screen reader, a div is meaningless—it doesn’t announce as interactive, it doesn’t respond to the Enter or Space key, and it has no implicit role. Using the correct semantic element gives you all of this behavior for free.
Add Proper ARIA Labels
ARIA (Accessible Rich Internet Applications) attributes provide additional context to assistive technologies when semantic HTML alone isn’t enough. The most commonly needed ones are:
- aria-label — Provides a text label for an element that doesn’t have visible text (like an icon button)
- aria-labelledby — Points to another element that serves as the label
- aria-expanded — Indicates whether a collapsible element (like a dropdown menu) is open or closed
- aria-hidden — Hides decorative elements from screen readers
- role — Defines the purpose of an element when semantic HTML isn’t sufficient
A critical rule: the first rule of ARIA is “don’t use ARIA” if native HTML can do the job. ARIA is a supplement, not a replacement. A <button> element is always better than <div role="button">.
Label Your Form Fields
Every form input needs a <label> element that’s programmatically associated with it (using the for attribute matching the input’s id). Placeholder text is not a substitute for labels. Placeholders disappear when you start typing, which means users can’t remember what information was requested. And many screen readers don’t consistently announce placeholder text.
If your responsive design uses floating labels (where the label moves above the input when focused), make sure the label is still a proper <label> element, not just a styled span.
Add a Skip Link
A skip link is a hidden link at the very top of the page that becomes visible when a keyboard user presses Tab. It allows them to skip directly to the main content without having to tab through the entire navigation menu on every page. This is one of the simplest accessibility features to implement and one of the most appreciated by keyboard users.
The HTML is straightforward: <a href="#main-content" class="skip-link">Skip to main content</a>, with CSS that positions it off-screen by default and shows it on :focus.
Testing Tools You Should Use
No single tool catches every accessibility issue, but these three will cover the majority:
WAVE (Web Accessibility Evaluation Tool)
A free browser extension from WebAIM that visually overlays accessibility errors, warnings, and features directly on your page. It’s the most intuitive tool for beginners because you can immediately see what’s wrong and where. Run it on every page of your site.
axe DevTools
A browser extension built by Deque Systems that integrates into your browser’s developer tools. It’s more technical than WAVE but catches a wider range of issues and provides detailed remediation guidance. The free version is excellent; the paid version adds additional checks.
Google Lighthouse
Built into Chrome DevTools, Lighthouse includes an accessibility audit as part of its overall site quality assessment. It’s less detailed than dedicated accessibility tools, but it’s convenient because you’re probably already using Lighthouse for performance testing.
Manual Testing
Automated tools catch about 30 to 40% of accessibility issues. The rest require manual testing. Here’s a basic manual testing checklist:
- Navigate the entire site using only the keyboard (Tab, Shift+Tab, Enter, Escape, Arrow keys)
- Test with a screen reader (VoiceOver on Mac, NVDA on Windows—both are free)
- Zoom the page to 200% and check that nothing breaks or overlaps
- Increase the default text size to 200% in browser settings
- Turn off images and check that alt text makes sense in context
- Check all forms by filling them out with a keyboard and screen reader
- Verify that error messages are specific and helpful
If budget allows, hire people with disabilities to do real user testing. They will find issues that no tool or sighted tester ever would.
The Business Benefits Beyond Compliance
I’ve focused a lot on what you need to do, but let me make the positive case for why accessibility is genuinely good for your business—beyond just avoiding lawsuits.
Better SEO
Search engines and screen readers consume your website in remarkably similar ways. Proper heading structure, alt text, semantic HTML, and clean code all help Google understand and rank your content. Many of the accessibility improvements I’ve described are also SEO best practices. You’re not doing extra work—you’re doing the same work more thoroughly.
Better User Experience for Everyone
Accessibility improvements make your site better for all users, not just those with disabilities. Higher color contrast means easier reading for everyone, including people using their phones outdoors. Keyboard navigation helps power users who prefer keyboard shortcuts. Clear form labels reduce errors for everyone. Captions on videos help people watching in quiet environments.
Larger Market Reach
People with disabilities represent a market of over one billion people globally, with an estimated spending power of $8 trillion. Add in their friends and family who are influenced by brand loyalty and accessibility reputation, and you’re looking at an even larger economic impact. An accessible website opens your business to this entire market segment.
Stronger Brand Reputation
Businesses that prioritize accessibility signal that they care about all their customers. In an era where consumers increasingly choose brands based on values, demonstrating genuine inclusion is a powerful differentiator. It’s the kind of thing people notice and talk about.
Getting Started: A Priority Checklist
You don’t need to fix everything at once. Here’s a prioritized checklist, starting with the highest-impact, lowest-effort items:
- Week 1: Run WAVE and Lighthouse audits on your top 5 pages. Document all errors.
- Week 2: Add alt text to all images. Fix color contrast issues. Add form labels.
- Week 3: Add a skip link. Ensure all interactive elements are keyboard accessible. Add ARIA labels to icon buttons and navigation.
- Week 4: Test the full site with keyboard-only navigation. Fix any issues found. Check heading hierarchy on all pages.
- Ongoing: Include accessibility in your design and development process for all new content. Test before every major launch.
If you need help implementing these changes or want a thorough accessibility audit of your existing site, our web development team builds accessibility into every project from day one. We’ve learned—the hard way, as I described at the beginning of this article—that accessibility isn’t something you bolt on at the end. It’s something you build in from the start.
The Real Point
At its core, web accessibility is about respecting the people who visit your website. All of them. It’s about recognizing that the web was designed to be universal—a platform where anyone, regardless of ability, can access information, buy products, and participate in the digital world.
When we build inaccessible websites, we break that promise. When we build accessible ones, we keep it. And in my experience, the businesses that care about getting this right tend to care about getting everything right. Accessibility isn’t a tax on development—it’s a sign of quality.
Start where you are. Fix what you can. Build better going forward. Your future customers—all of them—will thank you for it.
Frequently Asked Questions
What is WCAG and which level should I aim for?
WCAG stands for Web Content Accessibility Guidelines, published by the W3C. There are three conformance levels: A (minimum), AA (recommended), and AAA (highest). Most legal requirements and industry standards call for WCAG 2.1 Level AA compliance. This covers the most impactful accessibility requirements without demanding perfection on every edge case. Level AA should be your target.
Is web accessibility legally required?
In many countries, yes. In the United States, the ADA has been interpreted by courts to apply to websites. The European Accessibility Act requires digital services to be accessible. Many other countries have similar legislation. Even where laws are not yet specific about websites, the trend is clearly moving toward mandatory digital accessibility. It is safer and smarter to build accessibly now than to wait for a legal requirement or lawsuit.
How much does it cost to make a website accessible?
If you build accessibility in from the start, the additional cost is minimal—often just 5 to 10 percent of the total development budget. Retrofitting an existing inaccessible website is significantly more expensive, potentially 25 to 40 percent of a rebuild cost depending on the severity of the issues. The most cost-effective approach is to include accessibility requirements in your initial design and development process.
Do accessibility overlays and widgets work?
Accessibility overlay widgets that promise one-click compliance are widely criticized by accessibility experts and disability advocates. They don’t fix underlying code issues, can actually make the experience worse for screen reader users, and provide a false sense of compliance. Some companies have even faced lawsuits despite using these overlays. The only reliable way to achieve accessibility is to fix the actual code and design of your website.
How do I test my website for accessibility?
Start with automated tools like WAVE, axe DevTools, or Google Lighthouse, which catch about 30 to 40 percent of accessibility issues. Then do manual testing: navigate your entire site using only the keyboard, test with a screen reader like NVDA or VoiceOver, check color contrast ratios, and resize text to 200 percent. For thorough coverage, consider hiring people with disabilities to do user testing, as they will catch issues that automated tools and sighted testers miss.
Does web accessibility help with SEO?
Yes, there is significant overlap between accessibility best practices and SEO. Proper heading structure helps search engines understand your content hierarchy. Alt text on images gives search engines context about your visual content. Semantic HTML makes your pages easier to crawl and index. Fast loading times and mobile responsiveness are both accessibility and SEO factors. Building an accessible website naturally improves your search engine visibility.