OSHA Recordkeeping Requirements: Forms 300, 300A, and 301

Employers covered by 29 CFR Part 1904 must track, record, and report work-related injuries and illnesses using three interconnected OSHA forms: the OSHA 300 Log, the OSHA 300A Summary, and the OSHA 301 Incident Report. These requirements apply to most private-sector establishments with 11 or more employees, with specific industries subject to partial or full exemptions. Understanding the mechanics of each form — what triggers a recordable event, how classifications work, and when electronic submission is required — is essential to maintaining compliance under the regulatory context for workplace safety that governs U.S. employers.

• Definition and Scope
• Core Mechanics or Structure
• Causal Relationships or Drivers
• Classification Boundaries
• Tradeoffs and Tensions
• Common Misconceptions
• Checklist or Steps
• Reference Table or Matrix
• References

Definition and Scope

OSHA's injury and illness recordkeeping system, codified at 29 CFR Part 1904, requires covered employers to document work-related fatalities, injuries, and illnesses that meet defined severity thresholds. The program does not function as a reporting system to OSHA in real time for most incidents — it is primarily an internal recordkeeping obligation, with separate, narrower requirements triggering active reporting to OSHA (e.g., fatalities within 8 hours, hospitalizations within 24 hours, per 29 CFR §1904.39).

The threshold for mandatory participation is establishment size: employers with 10 or fewer employees at all times during the prior calendar year are exempt from routine recordkeeping requirements, per 29 CFR §1904.1. Employers with 11 or more employees must maintain the 300 Log and 301 forms unless their industry falls under a low-hazard partial exemption.

A second exemption tier covers employers in low-hazard industries as defined by OSHA's North American Industry Classification System (NAICS) appendix. These employers — including retail, finance, insurance, and real estate sectors enumerated in Appendix A to Subpart B of 29 CFR Part 1904 — are partially exempt from maintaining the 300 Log and 301, though they remain subject to fatality and severe injury reporting.

The broader landscape of OSHA standards and requirements contextualizes recordkeeping as one component of a multi-layered compliance framework, not a standalone obligation.

Core Mechanics or Structure

OSHA Form 300: Log of Work-Related Injuries and Illnesses

Form 300 functions as a running log maintained at the establishment level throughout each calendar year. Each recordable case receives a unique case number, the employee's name (subject to privacy case rules), job title, date of injury or onset of illness, location where the event occurred, and a brief description of the event. The form then classifies each case into one of 5 outcome columns:

1. Death
2. Days away from work
3. Job transfer or restriction
4. Other recordable cases
5. Illness classification (skin disorder, respiratory condition, poisoning, hearing loss, all other illnesses)

Employers must enter the number of calendar days away from work or on job transfer/restriction, not workdays. The count begins the day after the injury and caps at 180 days for recording purposes, per 29 CFR §1904.7(b)(3)(i).

OSHA Form 300A: Summary of Work-Related Injuries and Illnesses

Form 300A aggregates the annual 300 Log data into establishment-level totals. It must be posted in a visible workplace location from February 1 through April 30 of the year following the recorded year (29 CFR §1904.32). A company executive — defined as an owner, officer, or highest-ranking company official at the site — must certify the accuracy of the summary. The form also captures total hours worked and average number of employees, which enables rate calculations.

OSHA Form 301: Injury and Illness Incident Report

Form 301 provides case-level detail for each entry on the 300 Log. It captures the employee's personal information, healthcare provider details, time of event, exact sequence of events leading to injury, object or substance involved, and the nature of the injury. Employers must complete Form 301 within 7 calendar days of learning that a recordable injury or illness occurred (29 CFR §1904.29(b)(3)). Workers' compensation first report of injury forms that capture equivalent information may substitute for Form 301, provided they contain all required data fields.

Causal Relationships or Drivers

The recordkeeping obligation is triggered by two simultaneous conditions: work-relatedness and recordability.

Work-relatedness is presumed when an event or exposure in the work environment either caused or contributed to the injury or illness, or significantly aggravated a pre-existing condition (29 CFR §1904.5). Nine specific exceptions exist, including injuries arising from personal tasks performed outside assigned duties, self-inflicted injuries, and common cold or flu cases.

Recordability requires that the case be a new work-related injury or illness that results in at least one of: death, days away from work, restricted work or job transfer, medical treatment beyond first aid, loss of consciousness, or a diagnosis of a significant injury or illness by a licensed healthcare professional (29 CFR §1904.7).

The distinction between first aid and medical treatment is a critical classification driver. First aid encompasses 15 specific treatments enumerated in 29 CFR §1904.7(a) — including use of nonprescription medications at nonprescription strength, tetanus immunizations, and cleaning wounds. Any treatment not on that list constitutes medical treatment that triggers recordability. For deeper analysis of how injury causation intersects with safety program structure, see incident investigation procedures.

Classification Boundaries

Three classification boundaries generate the most compliance complexity:

Privacy Cases: When the injury involves a sensitive condition — reproductive disorder, mental illness, HIV/AIDS, hepatitis, tuberculosis, sexual assault, or cases where the employee requests privacy — the employer must enter "privacy case" in place of the employee's name on Form 300. A separate, non-public list cross-referencing case numbers to employee names must be maintained (29 CFR §1904.29(b)(6)).

Musculoskeletal Disorder (MSD) Column: OSHA removed the mandatory MSD column from Form 300 in a 2003 rulemaking. Employers are not required to check a separate MSD column, though work-related MSDs remain recordable under the standard criteria. Ergonomics and musculoskeletal disorder programs frequently reference recordkeeping data to identify exposure patterns.

Multi-Establishment Employers: Each physical establishment that is expected to be in operation for at least one year must maintain separate records (29 CFR §1904.30). Short-term establishments (those expected to operate fewer than one year) may keep records at a central location, provided the records are accessible and employees can access them.

Tradeoffs and Tensions

Electronic Submission Requirements vs. Privacy Protection

OSHA's electronic submission rule (29 CFR §1904.41), finalized with amendments effective January 1, 2024, requires establishments with 100 or more employees in high-hazard industries to submit Form 300 case-level data electronically through OSHA's Injury Tracking Application (ITA) annually. Establishments with 250 or more employees in covered industries must submit 300A summary data. This creates tension between OSHA's stated goal of public transparency (the agency has indicated intent to publish case-level data) and worker privacy interests regarding injury descriptions and body part information that could enable re-identification.

Recordkeeping Accuracy vs. Potential Deterrence

A persistent tension in the regulatory literature is whether the recordkeeping requirement inadvertently discourages reporting. Employers facing elevated Days Away, Restricted, or Transferred (DART) rates and Total Recordable Incident Rates (TRIR) in OSHA-targeted industries have financial and reputational incentives to manage how cases are classified. OSHA anti-retaliation provisions under 29 CFR §1904.35 and Section 11(c) of the OSH Act directly address this by prohibiting disciplinary actions that discourage injury reporting.

Five-Year Retention vs. Statute of Limitations Misalignment

Records must be retained for 5 years following the end of the calendar year they cover (29 CFR §1904.33). However, OSHA's general statute of limitations for citations is 6 months from the violation's occurrence under Section 9(c) of the OSH Act. The 5-year retention window primarily serves internal program management and serves as data for injury trend analysis rather than active enforcement lookback in most scenarios.

Common Misconceptions

Misconception 1: All injuries at work must be recorded.
Only injuries meeting the work-relatedness test and recordability criteria in 29 CFR §1904.5 and §1904.7 are recordable. An employee who trips in the parking lot on a personal errand or who visits the occupational health clinic and receives only first-aid treatment does not generate a required 300 Log entry.

Misconception 2: The OSHA 300A must be sent to OSHA annually.
Standard 300A submission to OSHA is only required for establishments that meet electronic submission thresholds under 29 CFR §1904.41. All other covered establishments must post the 300A at the worksite but are not required to proactively transmit it to OSHA absent a specific request or inspection.

Misconception 3: Zero-injury years require no action.
Even when a calendar year produces zero recordable cases, Form 300A must still be completed, certified by a company executive, and posted from February 1 through April 30. The total fields are filled with zeros, but the form itself is not optional.

Misconception 4: Independent contractors are covered by the host employer's records.
Employers record cases for their own employees — those on the employer's payroll. Cases involving employees of a staffing agency or subcontractor are recorded by the employer who supervises the day-to-day work, not automatically the site-controlling employer, per 29 CFR §1904.31. Supervised workers placed by a temporary staffing agency are recorded by the host employer.

Misconception 5: Prescription medication use always makes a case recordable.
Prescription medication use is a form of medical treatment beyond first aid and creates a recordable case only if it treats a work-related condition. If a physician prescribes medication at prescription strength but later determines the condition was not work-related, the case may be removed from the 300 Log if that determination meets the conditions in 29 CFR §1904.10 for hearing loss and the general criteria.

Checklist or Steps

The following sequence reflects the procedural structure established in 29 CFR Part 1904 for processing a potential recordable incident.

Step 1 — Establish whether the case is work-related.
Apply the presumption of work-relatedness under §1904.5. Evaluate whether any of the 9 listed exceptions apply.

Step 2 — Determine if the case is a new case or a continuation.
A previously recorded case that recurs with new symptoms from the same injury is not a new case unless it involves a new event or exposure.

Step 3 — Apply recordability criteria.
Evaluate whether the case resulted in death, days away, restricted work, job transfer, medical treatment beyond first aid, loss of consciousness, or a licensed professional's diagnosis of a significant condition.

Step 4 — Check for privacy case status.
If the case involves a sensitive diagnosis or the employee requests privacy, assign "privacy case" designation and maintain a separate cross-reference list.

Step 5 — Complete Form 301 within 7 calendar days.
Enter all required fields. Confirm whether the employer's workers' compensation first report form captures equivalent data and may substitute.

Step 6 — Enter the case on Form 300.
Record the case number, employee name (or "privacy case"), description, and classify into the appropriate outcome column.

Step 7 — Update the 300 Log if case status changes.
If the employee returns to full duty sooner than expected, or additional days are lost, update the day count accordingly. Entries may be corrected but must not be deleted.

Step 8 — Complete Form 300A at year-end.
Aggregate all 300 Log totals. Calculate annual average employment and total hours worked. Obtain executive certification.

Step 9 — Post Form 300A.
Display at the worksite from February 1 through April 30. At multi-establishment employers, post at each covered location.

Step 10 — Evaluate electronic submission obligation.
Determine if the establishment meets NAICS classification, employee count, and industry classification thresholds under §1904.41. Submit through OSHA's Injury Tracking Application by the applicable deadline (March 2 for prior-year data).

Step 11 — Retain all records for 5 years.
Maintain Form 300, 300A, and all 301 forms for 5 years after the end of the calendar year they cover. Make records available to current and former employees and their representatives per §1904.35.

The comprehensive view of workplace safety metrics and KPIs — including DART and TRIR calculations — draws directly from the data captured in this recordkeeping system. A foundational overview of the entire regulatory framework governing these obligations is available at the workplace safety authority home.

Reference Table or Matrix