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OSHA & MIOSHA Compliance Guides

Compliance guides for employers: OSHA 300 log and 300A deadlines, annual safety calendars, safety audits, and the requirements that apply when you open a new operation or facility. Written by Michigan safety consultants who help companies stay audit-ready.

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Latest: May 25, 2026

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Quick answers

Regulatory Compliance questions

Short answers for supervisors and safety leads.

When must the OSHA 300A summary be posted?

Covered employers must post the Form 300A summary of the previous year’s injuries and illnesses from February 1 to April 30 where notices to employees are usually posted, after a company executive certifies it (29 CFR 1904.32).

Who must submit injury data to OSHA electronically?

By March 2 each year, establishments with 250 or more employees that must keep OSHA records, and establishments with 20 to 249 employees in industries listed in Appendix A to Subpart E, must submit Form 300A data. Establishments with 100 or more employees in industries listed in Appendix B must also submit Form 300 and 301 data (29 CFR 1904.41).

How long must OSHA injury records be kept?

Keep the OSHA 300 log, the privacy case list (if any), the 300A summary and the 301 incident reports for five years following the end of the calendar year they cover (29 CFR 1904.33).

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