The right IAAP certification depends on the work you do. CPACC is the entry credential covering accessibility concepts, disability awareness, standards, and universal design at a broad level. WAS is the technical credential for people who evaluate and remediate web content against WCAG. CPWA combines both and signals senior web accessibility expertise. ADS is the newer credential focused on accessible document creation and review. Most people start with CPACC, then add WAS if their role is hands-on with web code, or ADS if their role centers on documents.
| Certification | Best Fit |
|---|---|
| CPACC | Generalists, managers, designers, and newcomers building a broad accessibility foundation. |
| WAS | Auditors, developers, and QA professionals evaluating web content against WCAG. |
| CPWA | Senior web accessibility practitioners who have earned both CPACC and WAS. |
| ADS | Specialists creating, remediating, or reviewing accessible documents (PDF, Word, PowerPoint). |
What Each IAAP Certification Actually Covers
CPACC (Certified Professional in Accessibility Core Competencies) is the foundation exam. It covers disabilities and the people who experience them, accessibility standards and laws across multiple regions, and the principles of universal design. It is broad, not deep. Anyone working in or adjacent to accessibility can sit for it.
WAS (Web Accessibility Specialist) is the technical exam. It focuses on WCAG, evaluation methods, ARIA, assistive technology behavior, and remediation. Passing WAS signals you can evaluate a website against WCAG and recommend correct fixes.
CPWA (Certified Professional in Web Accessibility) is not a separate exam. You earn it automatically when you hold both CPACC and WAS. It is the credential most senior web accessibility professionals carry.
ADS (Accessible Document Specialist) is the documents credential. It covers tagging, reading order, alt text, tables, forms, and remediation across PDF, Word, and PowerPoint. ADS is its own track and does not require CPACC first.
Which IAAP Certification Should You Start With?
Start with CPACC if you are new to the field, working in a generalist or management role, or building credibility for consulting work. It is the most recognized starting point and the prerequisite half of CPWA.
Start with WAS if you already work with web code, evaluate sites against WCAG, or audit for a living and need a technical credential fast. You can take WAS without holding CPACC, but holding both gets you CPWA, which carries more weight.
Start with ADS if your work centers on documents, government Section 508 document review, or remediation production for clients producing high volumes of PDFs.
How to Choose IAAP Certifications Based on Your Role
Auditors and consultants almost always pursue CPWA. The combination demonstrates both conceptual depth and technical evaluation skill, which is what clients procuring audit services look for.
Developers focused on accessibility tend to go straight to WAS. The exam aligns closely with their day-to-day work and the credential is recognized by hiring teams reviewing technical candidates.
Designers, product managers, and program leaders typically stop at CPACC. The breadth matches their role, and the deeper technical material in WAS does not map to their responsibilities.
Document specialists, often in government, EdTech, healthcare, or large publishing teams, pursue ADS. Some pair it with CPACC for a fuller credential set.
Experience and Prerequisites
IAAP recommends a baseline of accessibility work experience before sitting for any exam, but there are no enforced prerequisites for CPACC or ADS. WAS expects familiarity with HTML, CSS, JavaScript, ARIA, and assistive technology behavior. Sitting for WAS without that background usually does not go well.
If you are early in your career, the realistic path is CPACC first, gain a year or two of hands-on auditing or remediation work, then sit for WAS to complete CPWA.
Cost and Time Considerations
Each IAAP exam carries its own fee, and members pay less than non-members. Study time varies, but most candidates report 60 to 120 hours of preparation per exam depending on prior experience. CPACC tends to require more memorization of laws, standards, and disability categories. WAS requires hands-on practice with code and assistive technology.
Budget for the exam fee, IAAP membership if you want the member rate, and study materials. Recertification is required every three years through continuing education credits.
FAQs
Which IAAP certification is most valuable for getting hired?
CPWA carries the most weight for senior roles because it signals both conceptual and technical depth. For mid-level audit and remediation roles, WAS alone can be enough. For program management and consulting roles, CPACC is often sufficient.
Can I take WAS without CPACC?
Yes. WAS is its own exam with no formal prerequisite. You will not earn CPWA without also passing CPACC, but you can hold WAS on its own.
How long does each IAAP certification take to prepare for?
Most candidates spend two to four months preparing per exam, depending on existing experience. People already conducting audits often need less time for WAS. People new to the field often need more time for CPACC because of the breadth of material.
Do IAAP certifications expire?
Certifications remain active through continuing education credits and recertification every three years. Letting credits lapse means losing the credential and needing to retake the exam.
Is ADS worth pursuing on its own?
Yes, if document work is your specialty. ADS is well-suited for professionals supporting government, education, or financial services teams that produce large volumes of PDFs and need a credentialed reviewer.
The right credential is the one that matches the work in front of you. Pick based on the role you have or want, not based on which exam sounds most prestigious.
Contact Accessibility Base to find credentialed accessibility professionals.