An accessibility scan schedule is a recurring automated check that evaluates web pages against WCAG (Web Content Accessibility Guidelines) criteria at set intervals. Rather than conducting scans manually each time, a schedule automates the process so that new or reintroduced issues are caught on a predictable timeline.
| Key Point | What It Means |
|---|---|
| What It Does | Runs automated accessibility scans on a recurring basis without requiring someone to start each one manually |
| Common Frequencies | Daily, weekly, monthly, or custom intervals depending on how often site content changes |
| Scan Coverage | Automated scans flag approximately 25% of accessibility issues; the remaining 75% requires human evaluation |
| Primary Benefit | Catches regressions and new issues introduced through content updates or code deployments |
| What It Does Not Replace | A full (manual) audit conducted by an accessibility professional |
How an Accessibility Scan Schedule Works
A scan schedule loads specified web pages at predetermined times and runs automated checks against WCAG success criteria. The scanner evaluates HTML, CSS, and ARIA attributes to identify issues it can detect programmatically.
Results are typically delivered as a report or logged within a dashboard. Each scheduled scan produces a snapshot of the site’s accessibility status at that moment, making it possible to compare results over time and spot trends.
Choosing the Right Scan Frequency
The right frequency depends on how often a site changes. A marketing site that publishes new blog posts daily benefits from daily or weekly scans. A product documentation site updated quarterly may only need monthly scans.
Sites with frequent code deployments, such as web applications with regular release cycles, benefit from scans tied to deployment schedules. Conducting a scan after each release catches regressions before they reach a large audience.
Daily Scans
Best for high-traffic sites where content changes every day. News publishers, e-commerce platforms with rotating inventory, and SaaS applications with continuous deployment pipelines fall into this category. Daily scans catch issues within 24 hours of introduction.
Weekly Scans
A practical middle ground for most organizations. Weekly frequency balances coverage with reporting volume. Teams receive enough data to track progress without being overwhelmed by daily reports.
Monthly Scans
Appropriate for sites with infrequent updates. If a site’s content and code remain stable for weeks at a time, monthly scans provide adequate oversight. Organizations using monthly scans should still conduct an on-demand scan after any significant update.
What Scheduled Scans Detect
Automated scans flag approximately 25% of WCAG conformance issues. These tend to be issues that can be verified programmatically: missing alternative text attributes, form inputs without labels, empty links, language declarations, and similar markup-level concerns.
The other 75% of accessibility issues require a human evaluator. Screen reader testing, keyboard testing, and contextual review of content meaning are beyond what a scanner can assess. An accessibility scan schedule monitors the 25% continuously, but it does not replace the need for a (manual) audit.
Scanning Authenticated Pages
Many web applications require login credentials to access core functionality. Standard URL-based scanning cannot reach content behind authentication walls.
Browser extension-based scanners address this by running within an active session. The scanner operates inside the authenticated browser environment, evaluating pages the user can see after logging in. For web applications, scanning authenticated pages is critical because the majority of user-facing content often sits behind a login.
What to Include in a Scan Schedule
A scan schedule should cover pages and templates that represent the full user experience. This includes the homepage, primary navigation flows, form-heavy pages, checkout or signup processes, and any page templates that repeat across the site.
Prioritize pages with high traffic and pages with high user impact. A contact form or checkout page matters more to users than an archived press release from three years ago.
Using Scan Results Over Time
The value of a schedule compounds over time. A single scan gives a snapshot. A series of scans gives a trendline.
Tracking issue counts week over week reveals whether remediation efforts are reducing the total number of issues or whether new ones are being introduced faster than old ones are fixed. This data is useful for reporting to leadership, planning remediation sprints, and demonstrating progress toward WCAG conformance goals.
Scan Schedules Within a Broader Accessibility Program
Scheduled scans serve as a monitoring layer. They are one component of a broader accessibility program that also includes (manual) audits, remediation, and training.
A typical program structure looks like this: conduct a full audit to identify all issues across the WCAG conformance level, remediate those issues, then set up a scan schedule to monitor for regressions. Periodic re-audits, often annually, confirm that the site maintains conformance at a level that scans alone cannot verify.
Prioritizing Issues From Scheduled Scans
Not every issue a scan identifies carries the same weight. Prioritization frameworks typically use two factors: user impact and risk.
User impact measures how significantly an issue affects someone using assistive technology. A missing form label on a checkout page has high user impact. A redundant ARIA attribute on a decorative element has low user impact.
Risk considers legal and reputational exposure. Issues on high-traffic, public-facing pages carry more risk than issues on internal admin screens. Combining these two dimensions helps teams allocate remediation resources where they matter most.
An accessibility scan schedule provides the steady, repeatable data organizations need to maintain awareness of their WCAG conformance status between audits.