Most websites benefit from weekly accessibility scans, with high-activity sites moving to daily and stable sites reducing to monthly. The right scan frequency schedule depends on how often content changes, how many people contribute to the site, and whether scans feed into a tracked workflow. Scans flag approximately 25% of accessibility issues, so frequency decisions should account for what scans catch and what they miss.
| Site Type | Recommended Cadence |
|---|---|
| High-activity sites | Daily scans for news, e-commerce, and frequently updated content |
| Standard websites | Weekly scans for marketing sites, blogs, and corporate properties |
| Stable websites | Monthly scans for low-change sites with infrequent content updates |
| After major releases | Conduct a scan immediately after deployments, redesigns, or template changes |
What Determines the Right Scan Frequency Schedule
Three factors shape how often scans should run: content velocity, contributor count, and the role of scans in the broader evaluation program. A site that publishes ten articles a day has a different risk profile than a static brochure site updated quarterly.
Content velocity is the strongest signal. Pages that change frequently introduce new issues frequently. Each new image, form field, or interactive component is a potential point of regression.
Contributor count matters because more authors means more variation in how content is created. A marketing team of fifteen produces more inconsistency than a single content manager working from a style guide.
Daily Scans
Daily scans suit sites where content or code changes every day. News publications, large e-commerce catalogs, SaaS marketing sites with active growth teams, and platforms with user-generated content fall into this category.
The value of daily scans is early detection. An issue introduced Monday gets flagged Tuesday, before it compounds across additional pages or templates. Daily cadence pairs well with platforms that aggregate scan results and route them into tracked remediation workflows.
Weekly Scans
Weekly scans cover most standard websites. Marketing sites, corporate properties, blogs with moderate publishing volume, and SaaS applications with regular but not constant releases benefit from this rhythm.
Weekly cadence balances signal against noise. Daily scans on a low-change site produce repetitive reports. Monthly scans on a moderately active site let issues accumulate too long. Weekly hits the practical middle.
Monthly Scans
Monthly scans work for stable sites with infrequent updates. Documentation portals, archived content, and small business sites that change a few times a quarter can use monthly cadence without missing meaningful regressions.
Monthly is the floor for active monitoring. Anything less frequent stops functioning as monitoring and becomes occasional spot-checking.
Event-Based Scans
Scheduled cadence covers ongoing monitoring, but certain events call for an immediate scan regardless of the schedule:
- Major releases or deployments: New code can introduce regressions in components that previously passed.
- Template or theme changes: A single template update affects every page using that template.
- Third-party script updates: Embedded widgets, chat tools, and analytics scripts can introduce accessibility issues.
- Before a manual evaluation: Conducting a scan before an audit gives evaluators baseline data and reduces the time spent identifying issues that automated checks would catch.
Where Scans Fit in a Broader Evaluation Program
Scans are one input. They identify approximately 25% of WCAG issues, primarily in HTML, CSS, and ARIA attributes. The remaining 75% requires manual evaluation, including screen reader testing, keyboard testing, and visual inspection.
A frequent scan schedule does not replace periodic audits. It catches regressions between audits and surfaces obvious issues quickly. Treating scans as the entire evaluation program leaves the majority of WCAG conformance unchecked.
Authenticated and Multi-Environment Scanning
Public pages are easy to scan. Pages behind authentication, like account dashboards or member portals, require a browser-based scan running within an active session. Frequency considerations apply equally to authenticated areas, which often contain the most complex interactive components.
Staging and production environments warrant separate schedules. Scanning staging before deployment catches issues before they reach users. Scanning production confirms what was actually shipped.
Scan frequency is a starting point, not a final answer. Adjust based on how scan results actually feed into remediation workflows and how they connect to the manual evaluation work that covers the rest of WCAG.