The OSHA 300 Log is a detailed, year-round record of individual work-related injuries and illnesses, while the OSHA 300A is its mandatory annual summary, totaling cases, days, and hours for the establishment, which must be posted publicly from February 1st to April 30th and sometimes electronically submitted to OSHA. The 300 log tracks specifics like employee names and injury descriptions, whereas the 300A provides aggregate numbers for a holistic view, even if zero incidents occurred. OSHA Form 300 (Log of Work-Related Injuries and Illnesses) Purpose: To log individual, recordable work-related injuries and illnesses as they happen throughout the year. Content: Details each case, including employee name, job title, description, date, outcome (days away/restricted), and type of injury/illness. Requirement: Maintained by most employers with more than 10 employees; must be kept up-to-date within 7 days of a recordable incident. OSHA Form 300A (Summary of Work-Related Injuries and Illnesses) Purpose: To summarize the previous years totals from the 300 Log. Content: Totals for deaths, injury/illness cases, restricted/transferred cases, total hours worked, and average employees, plus company info. Requirement: Must be completed by February 1st, posted in a visible workplace location (like a break room) from February 1st to April 30th, and certified by a company executive. Submission: Some employers must also electronically submit their 300A data to OSHA. Key Difference 300: Detailed individual case log (internal use). 300A: Aggregated annual summary (for posting submission). AI can make mistakes, so double-check responsesOSHA 300 vs 300a: Whats the difference and what do you need?SitemateUnderstanding OSHA 300 Log - Forms 300A 301 Examples - HSIThe 300A forms are to be posted at the workplace location, in an area accessible by all workers, from February 1st to April 30th. hsi.com