There are several ways to test websites for accessibility: one way is to seek the help of an expert – like Rick Williams or the BIK team for example. BIK also awards a seal of approval for those pages that score more than 90 out of 100 points in the test. These tests cost money. On its website, BIK also offers a free self-assessment with 50 questions everyone can use to assess their website.
Having said that, Rick Williams also believes it’s especially important to not only test websites for accessibility standards but also in terms of usability, meaning their ease of use. He points out that "web accessibility is not the same as usability, but both are equally important. Companies should be aware of this. A website can meet all of the WCAG 2.0 requirements but still be difficult to navigate for users. This is why people with different types of disabilities, different devices and assistive technologies should always test these websites – ideally, independent from developer and provider - and do so during each phase of development. This also reduces effort, saves time and money and is the best way to prevent potential barriers."
This statement essentially describes the easiest way to achieve an accessible design for a website: namely by working on it right from the start. In doing so, there is usually not much more expense involved. In contrast, retrofitting and making a website more accessible afterward is always more expensive and sometimes not even possible. The more complex a website is, the harder it becomes. Although you can easily improve individual elements, others are best achieved with a website relaunch. If you keep testing for access barriers from the start of development, the changes can already be incorporated into the structure and don’t need to be corrected in a time-consuming and cost-intensive manner.
A critical point for webshops are the payment options that are added later on and are often not accessible. "Providers should verify that payment solutions are actually accessible to everyone."