comparison
WCAG 2.1 vs Section 508
WCAG 2.1 (Web Content Accessibility Guidelines 2.1, Global, 2018) and Section 508 (Section 508 of the Rehabilitation Act, United States — federal government and federal contractors, 1998 (2017 Refresh)) are two of the most-referenced accessibility frameworks in digital compliance. This guide compares them side by side — jurisdiction, scope, conformance approach, penalties, and how a single audit can cover both simultaneously.
What is WCAG 2.1?
WCAG 2.1 is the World Wide Web Consortium's accessibility standard published June 2018, adding 17 success criteria to WCAG 2.0 — primarily addressing mobile, low vision, and cognitive disabilities — and currently referenced as the conformance baseline by the European Accessibility Act and most procurement frameworks.
Maintainer
World Wide Web Consortium (W3C)
Jurisdiction and enforcement
Global. Referenced by EN 301 549 (current EU baseline) and many national laws.
What is Section 508?
Section 508 of the Rehabilitation Act requires US federal agencies, federal contractors, and recipients of federal funds to make their information and communications technology (ICT) accessible to people with disabilities, with conformance benchmarked against WCAG 2.0 Level AA via the 2017 Refresh.
Maintainer
US Access Board
Jurisdiction and enforcement
United States — federal government and federal contractors. GSA, agencies, US Court of Federal Claims.
WCAG 2.1 vs Section 508 — the key differences
The principal difference is jurisdictional: WCAG 2.1 applies in Global, while Section 508 applies in United States — federal government and federal contractors. WCAG 2.1 is maintained by World Wide Web Consortium (W3C); Section 508 is maintained by US Access Board. The standards differ on scope, conformance grading, and penalty structure — but a well-designed accessibility programme can satisfy both simultaneously by adopting the strictest applicable requirement and cross-mapping findings.
Scope
WCAG 2.1 covers: Web content, Mobile web, Web applications. Section 508 covers: Federal-agency websites and applications, Federal-contractor ICT, ICT procured with federal funds.
Penalties
WCAG 2.1: Same as WCAG 2.2 — penalties are downstream of the national law citing WCAG. Section 508: Procurement disqualification.
How to comply with both at once
Adopt the stricter applicable conformance level — typically WCAG 2.2 Level AA — as your engineering baseline. Audit against that baseline once, then cross-map findings to both WCAG 2.1 and Section 508 specific requirements. A single Accessibility Conformance Report (ACR) using VPAT 2.5 INT can document both.
When you might need just one
If you operate exclusively in Global and have no cross-border procurement exposure, you may only need WCAG 2.1. The same applies in reverse for Section 508. For organisations selling cross-border, into the EU or US public sector, the safer default is to plan to both simultaneously.
Sources
- Web Content Accessibility Guidelines (WCAG) 2.1 — W3C
- Section508.gov — GSA
- Section 508 Standards (ICT Refresh) — US Access Board
FAQ
Frequently asked questions
Cited answers. Sourced. Updated as standards and case law change.
Is WCAG 2.1 stricter than Section 508?
Neither standard is uniformly "stricter" — they cover different regulatory domains. WCAG 2.1 is more prescriptive about web content; Section 508 about federal-agency websites and applications. For organisations exposed to both, a unified WCAG 2.2 AA baseline typically satisfies the technical requirements of both.
Can a single audit satisfy WCAG 2.1 and Section 508?
Yes. Both standards ultimately reference WCAG-aligned criteria. A combined audit with cross-mapped findings can produce documentation acceptable to both regulators.
Which jurisdictions enforce WCAG 2.1?
Global. Referenced by EN 301 549 (current EU baseline) and many national laws.
Which jurisdictions enforce Section 508?
United States — federal government and federal contractors. GSA, agencies, US Court of Federal Claims.
What happens if I am not compliant with WCAG 2.1?
Same as WCAG 2.2 — penalties are downstream of the national law citing WCAG
What happens if I am not compliant with Section 508?
Procurement disqualification Contract termination or modification Bid protests at GAO and US Court of Federal Claims Reputational and downstream civil-rights exposure under Sections 501 and 504
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