What is an OSHA 300 log in US construction?

Last reviewed July 5, 2026

An OSHA 300 log is a record of work-related injuries and illnesses that employers must maintain. It tracks the details of incidents, including the type of injury and how it occurred. This log helps in ensuring proper reporting and compliance with OSHA regulations.

Key points

  • Required for employers with 10 or more employees
  • Used to record injuries, illnesses, and incidents
  • Must be updated annually and posted for review

The OSHA 300 log is essential for tracking workplace safety. Employers are required to review this log annually and post it in a visible area from February 1 to April 30 each year. Not maintaining this log can lead to penalties during OSHA inspections.

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Related questions

General information for US construction professionals — not legal advice. Lien deadlines, retainage caps and notice rules vary by state; verify with the state statute or a construction attorney.