evidoria

← Back to browse

Good practice Imported

U.S. Web Design System — Institutionalising WCAG-Tested Components Across Federal Government

United States of America · Washington · See the United States of America profile · See the Washington profile

Evidence: Descriptive / self-reported Top 10% 96/100 · Ask Evidence Copilot about this practice

Since 2015, GSA's open-source USWDS has built WCAG 2.1 AA accessibility into government web components by default; its 2025 VPAT report tested 44 components with automated and assistive-technology checks on every code change.

U.S. Web Design System — Institutionalising WCAG-Tested Components Across Federal Government

Details

Maturity
Established
Promoter
General Services Administration (GSA), Technology Transformation Services
Period
2015-present
Keywords
digital government, design systems, accessibility engineering

Context

USWDS was created in 2015 by 18F and the U.S. Digital Service and is now maintained by the General Services Administration's Technology Transformation Services. It is a free, open-source library of design principles, UX guidance and pre-built components for U.S. federal government websites, built to meet Section 508 and the 21st Century IDEA Act out of the box.

Results

The system targets WCAG 2.1 AA. Every code change is checked with automated scanning tools (pa11y, aXe) plus manual screen-reader (VoiceOver, JAWS) and keyboard-only testing. In March 2025 the team completed a VPAT 2.5 accessibility conformance assessment covering 44 components of USWDS version 3.11.0, published in May 2025. USWDS is used across hundreds of government websites reaching hundreds of millions of collective site views, per GSA's own account.

Conclusions

Adoption is voluntary: a large share of the federal government's many thousands of .gov domains still do not use USWDS, so its accessibility benefits are concentrated on adopting agencies rather than guaranteed government-wide.

Implementation
Indicative cost
Medium (€50k–€500k) — Maintained by a standing GSA team; no published budget figure.
Time to results
Long (> 3 years) — Continuously maintained since 2015 with versioned releases.
Staffing & skills
GSA Technology Transformation Services team

Conditions for success

  • automated scanning (pa11y, aXe) on every code change
  • manual screen-reader and keyboard-only testing
  • periodic third-party VPAT conformance assessment

Common failure modes

  • adoption is voluntary, so many federal .gov domains remain outside the system's accessibility coverage

Where it fits

Governance type
national government
Scale
national
Income level
high-income

Commonly funded by

National / regional programmes

Indicative funding routes for practices of this type — always check each programme's current calls and eligibility rules.

Replication kit

Reusable artefacts from this practice — as published by their sources.

Do you run this practice? Claim it — verified implementers get a public contact pathway and can propose corrections.

Data sources

Where this practice's information was retrieved from, and when.

Attachments

Similar practices you may find useful