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What is ADA or WCAG compliance for websites?

Short answer

The ADA is a U.S. civil rights law, and the Justice Department says it applies to the websites of businesses open to the public. WCAG is the technical standard for accessible websites, with levels A, AA and AAA. No federal rule sets a WCAG level for private businesses, but WCAG 2.1 or 2.2 Level AA is the common target.

In this answer
  1. 01What the law says today
  2. 02WCAG levels explained
  3. 03Why private businesses aim for AA anyway
  4. 04Where to start

What the law says today

The Justice Department's 2022 guidance says the ADA covers businesses open to the public, including what they offer online. It also says the department has no regulation with detailed technical standards for businesses. Businesses may choose how to make their sites accessible. The guidance points to WCAG and the federal Section 508 standards as helpful references.

Government websites have a firm rule. A 2024 Justice Department rule requires state and local governments to meet WCAG 2.1 Level AA. An April 2026 update moved the deadlines to April 2027 for larger governments and April 2028 for smaller ones.

WCAG levels explained

LevelWhat it coversWho aims for it
AThe most basic barriers, like missing alt textA minimum, never a goal
AAContrast, labels, keyboard use, captions and moreThe common target for business sites
AAAThe strictest criteria, not possible for every pageSpecialized sites where it fits

Why private businesses aim for AA anyway

Lawsuits over inaccessible websites happen regularly, and WCAG AA is the usual yardstick in settlements and expert reports. Meeting it also opens your site to more customers. This is general information, not legal advice. Ask a lawyer about your specific risk.

Good example. A law firm builds its new site to WCAG 2.2 AA and tests it with a screen reader. It publishes an accessibility statement with a contact for problems.

Bad example. A retailer adds an overlay widget, claims full compliance on its homepage and never tests its checkout.

Where to start

  • Fix missing alt text and form labels first.
  • Check text contrast against the 4.5 to 1 minimum.
  • Make every feature work with a keyboard.
  • Caption videos and give audio a transcript.

Read what website accessibility means. Our web design team builds every site to WCAG 2.2 Level AA.

Keep reading

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