508 Compliance Testing Certification: DHS Trusted Tester

The DHS Trusted Tester certification is the federally endorsed credential for evaluating whether web content meets Section 508 accessibility standards. It’s issued by the Department of Homeland Security, endorsed by the federal Accessibility Community of Practice for use across the entire U.S. government, and earned by completing DHS coursework and passing a final exam with a score of at least 85%.¹²

What the Certification Is

Trusted Tester exists to make Section 508 conformance testing repeatable. Different testers looking at the same web page should reach the same conclusions, and agencies receiving test results should be able to trust the methodology behind them. The current version, Trusted Tester 5.1, focuses specifically on web content and aligns with the ICT Testing Baseline maintained by the U.S. Access Board, a set of minimum test components that keeps coverage of Section 508 requirements consistent across agencies.¹³

Passing the exam grants you a certification ID that federal agencies recognize. That ID is what qualifies your name to appear on the formal compliance documentation used in federal procurement, and it’s often a hiring requirement for quality assurance roles that touch accessibility work.

Who Should Pursue It

The credential is aimed at people whose work produces Section 508 test results that federal agencies will accept. That includes federal employees running internal audits, contractors evaluating agency systems, and vendor-side testers preparing an Accessibility Conformance Report for a product being sold to the government.⁴ Enrollment is open to federal employees, contractors, and members of the public.¹

A boundary worth knowing before you commit: Trusted Tester 5.1 covers web content. If your accessibility work centers on software applications, hardware, documents, or non-web electronic content, this credential won’t cover all of it. Section 508 itself applies across information and communications technology broadly, but the DHS test process at version 5.1 is scoped to the web.¹

The other boundary is standard. Federal Section 508 regulations currently incorporate WCAG 2.0 Level AA success criteria, and that’s what the certification tests against.⁵ Newer WCAG versions (2.1 and 2.2) add success criteria that many organizations voluntarily test against, but they aren’t part of the enforceable federal baseline and aren’t the focus of the Trusted Tester exam.

Training: Hours, Cost, and Format

The certification curriculum runs approximately 70 or more hours of self-paced coursework. It’s broken into several modules that begin with foundational material on what Section 508 requires and why it matters, move into the technical standards for web content, cover the specific tools used during testing, and finish with hands-on training and a practice exam before the final certification exam.¹

Training is delivered through the DHS learning management system. DHS does not publish a fee for the training or exam on its enrollment portal, and the program has historically been offered at no cost.¹ Self-paced means the 70 hours can be spread across whatever timeline your schedule allows, though most candidates plan on several weeks of concentrated study before attempting the exam.

Before you start, expect to set up a testing environment that mirrors what you’ll use on real assessments. That typically means a screen reader such as JAWS or NVDA, a color contrast analyzer, and one or more automated accessibility checkers. Automated tools catch roughly 57% of accessibility issues on their own. Semi-automated tools that combine scanning with guided human checks push that closer to 80%. The remainder, including keyboard navigation logic, meaningful reading order, and whether alternative text actually conveys the right information, requires a trained human. Producing that trained human is essentially what the certification does.

The Exam

The final exam tests your ability to apply the Trusted Tester methodology to real web content and accurately identify and document accessibility barriers. The passing score is 85%, reduced from the previous threshold of 90% to make the certification more attainable while still requiring a high level of precision.²

Precision is the operative word. The methodology exists so that two certified testers evaluating the same page reach the same findings, and the exam checks whether you can follow the process closely enough to hit that bar. Candidates who fail typically fail on documentation quality and consistency rather than on identifying the obvious problems.

How It Compares to IAAP Certifications

Trusted Tester is not the only accessibility credential, and it’s worth understanding where it fits. The International Association of Accessibility Professionals offers three certifications that cover a broader scope:

CPACC (Certified Professional in Accessibility Core Competencies) is a foundational credential covering disabilities, universal design, and accessibility-related laws and management strategies. It targets people who manage and support accessibility programs rather than those doing hands-on technical testing.⁶
WAS (Web Accessibility Specialist) is a technical certification focused on evaluating and remediating web accessibility issues.
CPWA (Certified Professional in Web Accessibility) is awarded automatically to anyone who holds both CPACC and WAS.

The two credential families serve different jobs. Trusted Tester is methodology-specific and designed for people who need to produce Section 508 conformance test results that federal agencies will accept. The IAAP credentials are vendor-neutral and internationally recognized, which suits professionals working across public and private sectors or in roles that extend beyond hands-on testing. Someone doing federal procurement work usually wants Trusted Tester. Someone leading an accessibility program at a private company usually wants CPACC or CPWA. Someone doing both often holds both.

What the Credential Lets You Do

The practical payoff of the certification is the ability to sign your name to a Voluntary Product Accessibility Template. A completed VPAT is called an Accessibility Conformance Report, and it’s the primary document federal procurement officers use to decide whether a vendor’s product meets accessibility standards.⁷⁴

For each requirement in the template, the tester enters a conformance level: Supports, Partially Supports, Does Not Support, or Not Applicable. Any item marked “Partially Supports” or “Does Not Support” needs a remark explaining specifically how the product falls short.⁴ The specificity of those remarks often matters more than the conformance level itself, because procurement officers use them to gauge whether a gap is trivial or a deal-breaker. Experienced evaluators tend to trust an honest partial-support disclosure over an undocumented claim of full support.⁸

Two template editions exist. Use the Section 508 edition for products sold exclusively to U.S. federal agencies. Use the International edition if you’re also selling into markets covered by the European EN 301 549 standard.⁴

One thing the certification does not do is make a report permanent. An Accessibility Conformance Report reflects a product’s accessibility at a specific point in time. A feature redesign, a front-end framework change, or a third-party component update can break accessibility that previously worked. Major releases and substantial interface changes are natural triggers for re-testing, and a regular review cycle catches the regressions that slip in through incremental updates. Certified testers stay busy for exactly this reason: the work isn’t a one-time audit, it’s a maintenance function tied to every meaningful release.

1
Section508.gov. DHS Trusted Tester Process and Certification Program
2
Section508.gov. Trusted Tester for Web Certification Courses Version 5.1.3 Now Available
3
ICT Testing Baseline. ICT Testing Baseline Portfolio
4
Section508.gov. Accessibility Conformance Report/Voluntary Product Accessibility Template (VPAT) Frequently Asked Questions (FAQ)
5
Section508.gov. Applicability and Conformance Requirements
6
IAAP. Certified Professional in Accessibility Core Competencies (CPACC)
7
Information Technology Industry Council. VPAT
8
Section508.gov. Understanding Vendor Claims in Accessibility Conformance Reports for Section 508 Conformance