ADA web compliance applies to private businesses, state and local governments, and public accommodations under the Americans with Disabilities Act. Section 508 applies to federal agencies and the vendors who sell to them. Both reference WCAG as the technical standard, but the legal authority, enforcement path, and required documentation differ. ADA cases typically surface through private lawsuits or DOJ enforcement. Section 508 surfaces through federal procurement, where vendors must provide an Accessibility Conformance Report (ACR). The standards overlap on what accessibility looks like in practice, but they answer to different laws and different audiences.
| Factor | ADA Web Compliance | Section 508 |
|---|---|---|
| Who it covers | Private businesses, state and local governments | Federal agencies and their vendors |
| Legal source | Americans with Disabilities Act (1990) | Rehabilitation Act, Section 508 (1998 amendment) |
| Technical standard | WCAG 2.1 AA (Title II rule, common benchmark for Title III) | WCAG 2.0 AA (Section 508 Refresh) |
| How it surfaces | Lawsuits, demand letters, DOJ enforcement | Procurement requirements, ACRs, VPATs |
| Common document | Audit report, accessibility statement | ACR using the Section 508 VPAT edition |
What ADA Web Compliance Actually Means
The ADA is a civil rights law. Title II covers state and local government services. Title III covers private businesses that qualify as public accommodations. Neither title originally specified a digital standard, but courts and regulators have treated websites and apps as covered.
In April 2024, the DOJ finalized a Title II rule that points directly to WCAG 2.1 AA for state and local government web content and mobile apps. Title III still does not have a published technical regulation, but WCAG 2.1 AA is the working benchmark for private sector accessibility, and it is what plaintiffs and defense attorneys reference in ADA website lawsuits.
The practical output for ADA web compliance is an audit report that identifies issues against WCAG, a remediation plan, and an accessibility statement.
What Section 508 Actually Means
Section 508 is part of the Rehabilitation Act. It requires federal agencies to make their electronic and information technology accessible to people with disabilities. The 2017 Section 508 Refresh aligned the technical requirements with WCAG 2.0 AA.
The audience reach is much wider than federal employees. Any vendor selling software, hardware, or digital services to a federal agency has to show Section 508 conformance. That documentation comes in the form of an Accessibility Conformance Report, completed using the Section 508 edition of the VPAT.
If you are a SaaS company chasing a federal contract, Section 508 is what the procurement team is asking about, even if they say “VPAT.”
How Are the Two Standards Connected?
Both reference WCAG, which means the technical work to conform looks similar. An audit against WCAG 2.1 AA covers everything in WCAG 2.0 AA, plus the additional 2.1 criteria. So a product that conforms to WCAG 2.1 AA will satisfy the technical core of Section 508 and align with the Title II rule.
The work product is where they diverge. ADA web compliance is usually demonstrated through an audit report and a published accessibility statement. Section 508 is demonstrated through an ACR provided during procurement.
One product. Two different deliverables, depending on who is asking.
Which One Applies to You?
If you run a private business with a website that serves the public, you are working toward ADA web compliance. If you sell to state or local government, the new Title II rule pulls you in through procurement and contract requirements.
If you sell to a federal agency, Section 508 applies. You will be asked for an ACR before the contract closes. The ACR has to be based on a real evaluation, not a self-graded checklist.
Many companies need both. A SaaS platform selling to enterprise customers, federal agencies, and state governments will produce an ACR for procurement and conduct audits on the public marketing site for ADA risk reduction.
Audit First, Then Documentation
Whichever standard applies, the path starts the same way. A WCAG audit identifies the actual issues on the site or product. From there, remediation work closes the issues, and the audit results feed into either an accessibility statement (ADA) or an ACR (Section 508).
Automated scans only flag approximately 25% of issues, which is why an audit is the way to know where a digital asset actually stands. Scans miss the contextual issues that drive lawsuits and procurement rejections.
FAQ
Do I need a VPAT if I’m not selling to the federal government?
Probably not, at least not the Section 508 edition. Enterprise buyers in the private sector often request an ACR using the WCAG edition of the VPAT. It is the same document format, just measured against WCAG rather than Section 508.
Does WCAG 2.1 AA cover Section 508?
Yes, in the sense that WCAG 2.1 AA includes everything in WCAG 2.0 AA. A product audited and remediated to 2.1 AA covers the technical baseline Section 508 requires. The deliverable for federal procurement is still an ACR.
Can one audit support both ADA and Section 508 documentation?
Yes. A single WCAG 2.1 AA audit can serve as the basis for an accessibility statement on the public site and for an ACR used in federal procurement. The audit is the source of truth. The deliverables wrap around it.
Is Section 508 the same as ADA?
No. They are separate laws with separate audiences. ADA is a civil rights law for public accommodations and state and local government. Section 508 is a procurement requirement tied to federal agencies. The technical overlap through WCAG creates the illusion that they are the same, but the legal authority is different.
ADA web compliance and Section 508 are best treated as two questions about the same product: who is asking, and what document do they need to see.
Contact me for help with a WCAG audit, ACR, or remediation work: Contact Kris.