What is the OSHA 300 Log?

The OSHA 300 Log is the Log of Work-Related Injuries and Illnesses. Employers enter a one or two line description for each recordable injury or illness, then summarize the entries on the OSHA 300-A at the end of the year.

By Cairn. Updated October 29, 2026. Sources: eCFR text as of October 27, 2026.

What the rule says

“You must use OSHA 300, 300-A, and 301 forms, or equivalent forms, for recordable injuries and illnesses. The OSHA 300 form is called the Log of Work-Related Injuries and Illnesses, the 300-A is the Summary of Work-Related Injuries and Illnesses, and the OSHA 301 form is called the Injury and Illness Incident Report.”

29 CFR 1904.29(a). eCFR, text as of October 27, 2026.

“What do I need to do to complete the OSHA 300 Log? You must enter information about your business at the top of the OSHA 300 Log, enter a one or two line description for each recordable injury or illness, and summarize this information on the OSHA 300-A at the end of the year.”

29 CFR 1904.29(b)(1). eCFR, text as of October 27, 2026.

Where it applies

29 CFR 1904.29, Recordkeeping Forms and Recording Criteria: Forms 4 paragraphs use the term. Read the text on eCFR.
29 CFR 1904.32, Other OSHA Injury and Illness Recordkeeping Requirements: Annual summary 6 paragraphs use the term. Read the text on eCFR.
29 CFR 1904.7, General recording criteria 9 paragraphs use the term. Read the text on eCFR.

In the enforcement record

Federal and state-plan agencies issued 6,128 cited violations under 29 CFR 1904.29, Recordkeeping Forms and Recording Criteria: Forms, from January 2016 through September 10, 2026. The section ranks 39th among the 248 sections of 29 CFR cited at least 50 times. This is the count for the whole section, not for the term alone.

Cairn data, October 2026 snapshot.

See the full record for 29 CFR 1904.29

Related terms

OSHA 300A summary The annual summary of the injuries and illnesses on the OSHA 300 Log, certified and posted by February 1 and kept up until April 30.
Recordable injury A new, work-related case that results in death, days away, restricted work, job transfer, treatment beyond first aid, loss of consciousness or a significant diagnosis, or fits a special case in 1904.8 to 1904.11.
Days away from work Calendar days an employee is unable to work, or a health care professional recommends staying out, because of a work-related injury or illness, counted from the day after it began.
TRIR Total recordable incident rate: recordable cases per 100 full-time workers, calculated as cases times 200,000 divided by hours worked.
DART rate Days away, restricted or transferred rate: cases with days away, restricted work or job transfer per 100 full-time workers.
Establishment A single physical location where business is conducted or where services or industrial operations are performed.
Severe injury reporting Report a work-related death within 8 hours and an in-patient hospitalization, amputation or loss of an eye within 24 hours, with time limits and exceptions.

All terms in the OSHA glossary

Sources

29 CFR 1904.29, Forms. eCFR, text as of October 27, 2026.
Cairn data, October 2026 snapshot. Cairn analysis of the OSHA enforcement record.

Written by Cairn, updated October 29, 2026. The quoted text is copied from the sources above. A test compares each quotation with a stored copy of the source, and a separate script compares that copy with the live sources. This page explains the law and is not legal advice.