Accessible Websites Are Better Websites: The SEO and Sales Case

Almost every article about website accessibility is written to frighten you. Lawsuits, demand letters, settlement figures. I have written one of those myself, because the risk is real and pretending otherwise would be dishonest.

But fear is a terrible reason to do good work, and it produces bad decisions. It is what makes people buy a widget to make the scary thing go away rather than fix the site. So here is the other argument, the one I would lead with if the law did not exist at all.

Nearly everything that makes a site accessible also makes it a better site. Faster to crawl, easier to understand, simpler to use, and harder to abandon halfway through a purchase.

The customers you are turning away

The Centers for Disease Control and Prevention estimates that up to one in four American adults lives with some type of disability. Not all of those affect web use. Plenty do: vision, hearing, motor control, cognition.

Now add the group nobody counts. Situational and temporary limitations. Someone reading your menu in bright sun outside your restaurant. A parent doing one-handed checkout with a baby on their hip. Anyone with a broken wrist, an ear infection, or a phone on five percent brightness to save battery. A customer watching your video in a quiet waiting room with the sound off.

And the one that matters most for most Idaho businesses: your older customers. Presbyopia comes for essentially everyone past forty. Contrast sensitivity declines with age. Fine motor precision declines with age. If your buttons are small and your body text is light gray on white, you have quietly built a site that works worst for the demographic that most often has money to spend.

This is the curb-cut effect. Sidewalk ramps were built for wheelchair users and ended up serving strollers, delivery carts, suitcases and anyone on wheels. Accessibility work behaves the same way. It is aimed at a specific group and it lands much wider.

Where accessibility and SEO genuinely overlap

A search engine crawler and a screen reader are both software trying to understand a page without seeing it. They are solving nearly the same problem, so they reward nearly the same things.

• Real heading structure. Screen reader users move through a page by its headings. Search engines use the same structure to work out what a page covers and how it is organized. Bold text styled to look like a heading serves neither.
• Alt text. Written so a screen reader can describe an image, and used by image search to work out what the picture is.
• Descriptive link text. “Read more about our maintenance plan” tells a screen reader user where they are going and tells a search engine what the destination page is about. Nine links reading “click here” tell both of them nothing.
• Captions and transcripts. Required for deaf and hard-of-hearing visitors, and they turn the contents of your video into text that can actually be indexed. A video with no transcript is invisible to search.
• Clean semantic HTML. Proper elements used for their real purpose, which is what both assistive technology and crawlers parse.
• Page titles and declared language. Both are accessibility requirements. Both are on-page SEO basics.

If you have read my piece on what every page needs to get right on-page, that list will look familiar. It is largely the same list. You are not choosing between accessibility work and SEO work; a big chunk of it is one job.

The claim I am not going to make

You will read a great deal of SEO content asserting that Google ranks accessible sites higher, as though accessibility were a direct ranking factor.

That is not established, and I am not going to tell you it is. Google has not published accessibility conformance as a ranking signal, and an accessible site does not get a bonus for being accessible.

What is true is more indirect and more durable. The specific things accessibility requires, structure, text alternatives, meaningful links, working markup, are things search engines demonstrably do use. The benefit is real. The mechanism is that accessible sites tend to be well-built sites, not that a crawler is grading your conformance. I would rather give you the accurate version, because you will eventually meet someone who knows the difference.

Performance comes along for the ride

There is real overlap with speed, too, and this one is a ranking consideration through Core Web Vitals.

Accessible sites tend to use semantic HTML rather than deep stacks of nested containers, which means less markup and less script. One Core Web Vital, Cumulative Layout Shift, is directly about content jumping around while a page loads, which is both a ranking input and a genuine accessibility problem for anyone with a motor or attention difficulty who just tried to tap something that moved. The details are in Core Web Vitals in 2026.

The conversion argument, which is the strongest one

Here is where I would spend your money if the legal question vanished tomorrow.

An inaccessible checkout is a customer who cannot pay you. Not an annoyed customer. One who physically cannot complete the transaction, then leaves and buys from a competitor, and never tells you why. You do not see this in your analytics as an accessibility problem. You see it as an unremarkable drop-off on step three of your form.

Look at what the checklist items actually are. A form field with no label, an error message that only turns a box red, a keyboard trap in a modal, a submit button too small to hit reliably on a phone. Every one of those is an accessibility failure and a conversion leak. They are the same defects, counted twice.

I am not going to quote you a percentage lift, because the honest answer is that it depends entirely on your site and your customers, and the numbers floating around this topic are mostly vendor marketing. What I will say is that fixing a form nobody could submit has a very direct relationship with revenue, and it costs less than most people expect.

What it looks like in practice

When I converted Wufyre Coffee Roasters off Squarespace, I took the build all the way to ADA compliance as part of the job rather than as a line item. Not because they were threatened with anything. Because a coffee roaster selling online should not have a store that some of their customers cannot use, and doing it during the build costs a fraction of doing it later under pressure.

That is the general rule. Accessibility built in from the first line of code is close to free. Accessibility retrofitted onto a finished site is a project. Accessibility retrofitted onto a finished site with a demand letter on the desk is a project with a lawyer attached.

Where to start

Find out where you stand with the free checklist, which takes about an hour and needs nothing you do not already have. If you want to understand the standard behind it, that is WCAG 2.2 AA explained, and the legal backdrop is here.

Every site I build is made to WCAG 2.2 AA from the start, so this is not an upsell on a new project, it is included. For existing sites, the ADA compliance page covers the audit and remediation work, or book a free 30-minute call and I will tell you whether your site needs a project or an afternoon.