OSHA 300 Form: Complete Guide to the Log of Work-Related Injuries and Illnesses

The osha 300 form — officially titled the Log of Work-Related Injuries and Illnesses — is one of the most important recordkeeping documents that covered employers in the United States must maintain under federal law. Regulated by the Occupational Safety and Health Administration (OSHA), this form requires employers to track every work-related injury and illness that meets specific recording criteria throughout the calendar year. Understanding how to complete it correctly protects your business from costly citations and helps identify patterns that can prevent future incidents on the job site.

Congress passed the Occupational Safety and Health Act in 1970, giving OSHA broad authority to require employers to track workplace injuries and illnesses. The OSHA 300 form is the centerpiece of that recordkeeping system. It works alongside two companion documents — the OSHA 300A Summary and the OSHA 301 Incident Report — to give regulators, workers, and safety professionals a comprehensive picture of workplace hazards at any given establishment. Together, these three forms make up the OSHA recordkeeping system that affects millions of employers across nearly every industry sector in America.

Many employers feel confused about which incidents actually belong on the OSHA 300 log. Not every cut, bruise, or muscle strain automatically qualifies as a recordable case. OSHA's regulations at 29 CFR Part 1904 define precise criteria that must be met before you enter an incident on the log. A recordable case is any work-related injury or illness that results in days away from work, restricted work or job transfer, medical treatment beyond first aid, loss of consciousness, or diagnosis by a licensed healthcare professional of a significant injury or illness — even if none of the other criteria apply.

The stakes for non-compliance are real and substantial. OSHA inspectors routinely request OSHA 300 logs during inspections, and discrepancies between what happened on the floor and what appears on the log can result in citations under the General Duty Clause as well as specific recordkeeping violations. As of 2024, OSHA's maximum penalty for serious violations is $16,131 per violation, and willful or repeated violations can reach $161,323 per violation. For small businesses operating on thin margins, these fines can be genuinely damaging — making accurate recordkeeping not just a legal obligation but a financial priority.

Beyond regulatory compliance, the OSHA 300 log serves as a powerful internal safety management tool. When you review your log at the end of the year, patterns often emerge that would otherwise be invisible. You might discover that a disproportionate number of recordable incidents involve the same piece of equipment, the same department, or the same time of day. These patterns point directly to where your safety program needs strengthening. Companies with mature safety cultures use their 300 logs proactively — not just to satisfy inspectors but to drive continuous improvement in hazard identification and control.

Employers also need to understand that the OSHA 300 form is not a confidential document. Workers have a right to view the current year's log and any log from the previous five years for the establishment where they work. Authorized employee representatives — including union representatives — share that same right.

OSHA's regulations are explicit: you must provide access to the log by the end of the next business day after a request is made. This transparency requirement reflects OSHA's broader philosophy that workers who have access to injury data are better equipped to identify hazards and participate meaningfully in workplace safety programs.

This guide covers every aspect of the OSHA 300 form that employers and safety professionals need to know: who must keep the log, what must be recorded, how to complete each column correctly, key deadlines, and the most common mistakes that trigger OSHA citations. Whether you are setting up a recordkeeping system for the first time or auditing an existing program for accuracy, the information in this guide will help you stay in full compliance with 29 CFR Part 1904 and build a safer, better-documented workplace.

Determining whether a specific incident is recordable under OSHA's rules requires applying a two-part test. First, the case must be work-related — meaning that an event or exposure in the work environment either caused or significantly contributed to the injury or illness, or significantly aggravated a pre-existing condition. Second, the case must be a new case, not a continuation of a previously recorded condition. And third, it must meet at least one of OSHA's general recording criteria. Clearing all three of these hurdles is necessary before you enter anything on the log.

Work-relatedness is often the most contested aspect of recordkeeping decisions. OSHA presumes that any injury or illness that occurs in the work environment is work-related unless one of the specific exceptions applies. Those exceptions include events solely caused by personal tasks performed outside of assigned working hours, symptoms that surface at work but result entirely from a non-work event or exposure, voluntary participation in wellness programs or recreational activities, and injuries resulting from personal grooming or self-medication. If none of these exceptions apply and the injury happened at work, OSHA's presumption of work-relatedness stands.

Medical treatment beyond first aid is one of the most commonly misunderstood recording criteria. First aid — as defined in 29 CFR 1904.7 — includes a specific list of treatments: use of non-prescription medications at non-prescription strength, wound cleaning and covering with bandages, use of hot or cold therapy, non-rigid means of support like elastic bandages, drilling fingernails to relieve pressure, removing splinters, use of eye patches, and similar minor procedures.

Critically, it is the type of treatment received — not the severity of the injury — that determines whether it crosses the first-aid threshold. An injury treated with prescription medication is recordable even if it appears minor.

Days away from work and days of restricted work or job transfer are separate recording criteria that generate additional column entries on the OSHA 300 log. Days away from work means the employee was unable to come to work at all on scheduled workdays following the incident.

Days of restricted work means the employee came to work but could not perform all of their routine job functions, or was transferred to a different position temporarily. Both types of days are counted and recorded in separate columns on the form. Importantly, the day of the injury itself is never counted as a day away or restricted day — counting begins the following day.

Certain specific conditions are always recordable under OSHA rules regardless of the treatment received or the number of days lost. These include all work-related needle-stick injuries and cuts from sharp objects contaminated with another person's blood or potentially infectious material, all work-related cases of tuberculosis infection following exposure, all work-related cases of cancer and chronic irreversible disease, and all work-related fractured or cracked bones or teeth.

Additionally, any work-related injury or illness that results in a diagnosis by a licensed healthcare professional is recordable, even if the worker returns to full duty immediately and requires no treatment beyond the examination itself.

Mental health conditions present an emerging recordkeeping challenge for employers. OSHA's recordkeeping rule does cover mental illness — but only when a licensed healthcare professional determines that the mental illness is work-related and the employee voluntarily provides a medical opinion confirming the diagnosis. In practice, this means that post-traumatic stress disorder following a workplace violent incident, for example, could be recordable if these conditions are met. As workplace mental health receives greater regulatory and public attention, employers should be prepared to evaluate these cases with the same rigor they apply to physical injuries.

Privacy cases require special handling on the OSHA 300 log. When a recordable case involves an intimate body part or a reproductive system injury, a sexual assault, a mental illness, HIV infection, hepatitis, or tuberculosis, you must enter the words "privacy case" in the description column rather than the employee's name. Keep a separate confidential list of the case numbers and the corresponding employee names for these privacy cases, but do not include any personally identifying information on the log itself. This ensures that co-workers who review the log cannot identify which employee was involved in the sensitive incident.

One of the most consequential deadlines in the OSHA recordkeeping calendar is February 1. By that date each year, employers must complete the OSHA 300A Annual Summary — a separate one-page form that summarizes the total number of recordable cases, deaths, days away, days restricted, and job transfers that occurred at the establishment during the previous calendar year.

The 300A must be certified by a company executive who has knowledge of the recordkeeping process and the authority to bind the company. A company executive for this purpose means an owner, officer of a corporation, the highest-ranking company official working at the establishment, or the supervisor of the highest-ranking official if that person is not present.

The posting requirement is equally firm. The certified 300A Summary must remain posted in a conspicuous place — where other required notices like the OSHA "Job Safety and Health — It's the Law" poster are displayed — from February 1 through April 30 of the year following the data year.

In practical terms, this means your 2025 data goes on a summary that you certify by January 31, 2026, and post from February 1 through April 30, 2026. During that three-month window, current and former employees have the right to review the summary, and any OSHA compliance officer who walks through the door is entitled to see it as well.

Electronic submission requirements have expanded significantly in recent years. OSHA's final rule on electronic recordkeeping — updated in 2023 — now requires establishments with 100 or more employees in designated high-hazard industries to submit 300 log data (not just the 300A summary) electronically to OSHA's Injury Tracking Application (ITA) each year by March 2. Establishments with 20 to 99 employees in high-hazard industries are required to submit 300A summary data only.

OSHA publishes and updates the list of covered NAICS codes annually. If your establishment falls into either category, you must create an account in the ITA and submit data on time — failure to do so is itself a recordkeeping violation subject to citation and penalty.

The retention requirement for OSHA 300 records is five years following the end of the calendar year that the records cover. This means your 2025 log must be kept through at least December 31, 2030. During that retention period, you must update the log if new information becomes available that changes the entry — for example, if an employee initially recorded with days of restricted duty later develops a chronic condition that results in permanent impairment.

You must also produce the log for inspection upon request from OSHA inspectors, from the employees and their authorized representatives, and from the Bureau of Labor Statistics if selected for the annual survey.

Former employees have the same right to access records as current employees, with one important practical difference: the five-year retention period. If a former employee requests access to the OSHA 300 log, you are only required to provide records that you are still legally required to keep — meaning records from the past five calendar years.

Requests for records older than five years are outside the scope of the regulation, though some employers choose to retain records longer voluntarily for litigation protection purposes. Always provide access by the end of the next business day after a request — the regulation does not permit delays for administrative convenience.

State Plan states — the 28 states and territories that operate their own OSHA-approved programs — may have recordkeeping requirements that are at least as effective as federal OSHA's rules, and some have requirements that go beyond federal standards. California, for example, has its own Cal/OSHA recordkeeping regulations that differ from federal OSHA in important respects, including a different list of partially exempt industries and different electronic submission deadlines.

If your establishment is in a State Plan state, verify compliance with both the federal baseline and any state-specific additions. OSHA's website maintains a current list of State Plan states and links to their recordkeeping regulations.

Multi-employer work sites — common in construction, shipbuilding, and large manufacturing operations — create additional complexity for 300 log compliance. When a temporary staffing agency places workers at a host employer's work site, both the agency and the host employer may have recordkeeping obligations depending on the nature of the supervisory relationship. Under OSHA's recordkeeping rule, the employer who supervises the day-to-day work is generally responsible for recording injuries to those workers. Employers who use temporary workers should have a written agreement with their staffing agencies that clearly delineates which party is responsible for recordkeeping to avoid gaps or double-counting.

The most common OSHA recordkeeping citations involve under-recording — failing to enter cases that should have been logged. OSHA inspectors are trained to cross-reference 300 logs against workers' compensation claims, medical records, first-aid logs, supervisor incident reports, and employee interviews to identify cases that employers recorded as first aid only but that actually received prescription medication or other treatments that make them recordable.

If an inspector finds a significant gap between your first-aid log and your 300 log, it raises immediate questions about whether your recording decisions were accurate or whether someone in the management chain was improperly steering cases off the log.

Over-recording is a less common citation but still worth understanding. Some employers record every workplace injury regardless of whether it meets OSHA's recording criteria, out of an abundance of caution. While this approach avoids the under-recording problem, it inflates your OSHA incident rates, which can affect workers' compensation experience modification factors, disqualify you from bidding on contracts that have OSHA TRIR thresholds, and attract attention from OSHA's targeting programs that flag establishments with high injury rates for inspection. Accurate recording — recording everything that qualifies and nothing that doesn't — is the right standard, not simply conservative recording.

First-aid-only determination errors are among the most frequent root causes of recordkeeping violations. The confusion often arises because the OSHA definition of first aid does not align with the layperson's understanding of the term. In everyday conversation, people call almost any minor treatment "first aid." Under OSHA's regulation, however, first aid is a specific and finite list of 14 treatments.

If a treatment isn't on that list — for example, if the worker received a tetanus shot, a prescription anti-inflammatory, or a diagnostic procedure like an MRI — the case is automatically recordable even if the underlying injury seems trivial. Train your supervisors and HR staff on this specific list so they can make accurate recording decisions at the point of care.

Miscounting days is another frequent error. The most common mistake is counting the day of the injury as the first restricted or away day, when OSHA's rules require counting to start the following day. A second common error is stopping the count when a worker's personal physician clears them to return to work, without verifying that the treating physician — not just the worker's personal doctor — agreed that full duty was appropriate.

You must count all days away or restricted until a physician or other licensed healthcare professional provides written clearance for the employee to return to routine job functions without restrictions. If the worker retires, is terminated, or is permanently assigned to a modified position, stop counting at 180 days.

The relationship between OSHA 300 data and your organization's Total Recordable Incident Rate (TRIR) is direct and consequential. TRIR is calculated as the number of recordable cases from your 300 log multiplied by 200,000 (a normalization factor representing 100 full-time workers), divided by the total hours worked by all employees during the year.

A high TRIR can trigger placement on OSHA's Severe Violator Enforcement Program list, disqualify your establishment from certain government contracts, raise your workers' compensation premiums, and create reputational concerns with clients and insurers. Every recording decision you make on the 300 log ultimately flows into this rate, reinforcing why accuracy — in both directions — is critically important.

Retaliation for reporting injuries is a separate but related concern that directly affects the integrity of your 300 log. Under Section 11(c) of the OSH Act and OSHA's anti-retaliation regulations at 29 CFR 1904.35 and 1904.36, employers are prohibited from discouraging workers from reporting injuries and illnesses through policies, practices, or disciplinary actions that would deter a reasonable employee from making a report.

Incentive programs that reward workers for going without recordable injuries can be flagged as retaliatory if they are structured in a way that creates pressure not to report. If workers feel they will face negative consequences for reporting, your 300 log will not accurately reflect what is actually happening on the floor, and both you and your workers will be worse off as a result.

Auditing your OSHA 300 log regularly — not just at year-end — is a best practice that separates organizations with strong safety cultures from those that treat recordkeeping as an afterthought. A monthly review of open cases lets you update day counts in real time rather than scrambling to reconstruct timelines at year-end.

It also gives you an opportunity to identify trends while they are still forming — before a pattern of similar incidents leads to a serious injury or a regulatory intervention. Many safety professionals keep a separate tracking spreadsheet that mirrors the 300 log fields so they can run queries and spot trends that aren't visible from the paper form alone.

Building a sustainable OSHA 300 recordkeeping program requires more than knowing the rules — it requires systems, training, and accountability structures that ensure the rules are applied consistently across every level of your organization. The first step is designating a specific person or team responsible for making final recording decisions.

Many organizations make the mistake of leaving these decisions to individual supervisors, who may lack training in the nuances of 29 CFR 1904 and who may face social pressure from their teams or their own managers to keep incidents off the log. Centralizing the recording decision with a trained safety professional or HR manager reduces inconsistency and the risk of under-recording.

Training supervisors on their role in the recordkeeping process is essential even if they are not making the final recording decision. Supervisors are typically the first to learn about an incident, and their initial response determines how quickly and accurately the information reaches the safety office.

They need to understand: what constitutes a work-related incident, why every injury and illness must be reported regardless of perceived severity, how to complete a first report of injury accurately, and what information to gather from the employee and any witnesses before memories fade. An untrained supervisor who tells a worker to put ice on their wrist and "see how it feels tomorrow" may be creating a recordable case that never gets properly documented.

Integrating your first-aid log with your 300 log review process is one of the highest-leverage practices in OSHA recordkeeping. Every entry in your first-aid log is a potential recordable case that was determined not to meet recording criteria. Periodically — at least monthly — compare every first-aid log entry against your 300 log to verify that your recording decisions were correct.

Ask: did the employee see a doctor? Did they receive a prescription? Did they miss any work? Did they perform modified duties even informally? If any of these questions produce a yes answer and the case isn't on your 300 log, you have an under-recording issue that needs to be corrected and the recording criteria training needs to be revisited.

When you discover a recording error — whether an omission or an incorrect entry — correct it promptly and document the correction. Add a note in the log explaining why the change was made and when you learned the information that required the correction. Do not erase or white-out original entries; draw a line through the incorrect information, make the correction nearby, and note the date.

OSHA's regulations explicitly require that you update entries when new information becomes available, so timely corrections demonstrate compliance rather than concealment. An audit trail of honest corrections is far better than a pristine but inaccurate log.

Technology can significantly reduce the administrative burden of OSHA 300 recordkeeping while improving accuracy. Many safety management software platforms include modules that automate the recording decision workflow — prompting supervisors to answer the key questions (work-related? treatment type? days away?), routing the case to a safety manager for review, auto-populating the 300 form fields, and generating the 300A summary at year-end.

Some platforms also integrate with workers' compensation systems to flag potential recording mismatches automatically. The investment in purpose-built recordkeeping software typically pays for itself quickly in reduced audit risk, saved staff time, and improved accuracy of the TRIR calculations used in contract bidding.

Understanding how your OSHA 300 data compares to industry benchmarks gives you context for evaluating your safety performance. The Bureau of Labor Statistics publishes annual industry injury and illness rates by NAICS code — showing the number of recordable cases, days away cases, and lost workday cases per 100 full-time equivalent workers for hundreds of industries.

Comparing your establishment's TRIR and DART (Days Away, Restricted, or Transferred) rate against these benchmarks tells you whether your incident rates are better or worse than your industry peers. It also tells you what an OSHA inspector will be looking at — establishments with rates significantly above the industry average are more likely to receive targeted inspections under OSHA's Site-Specific Targeting program.

The long-term value of accurate OSHA 300 recordkeeping extends far beyond regulatory compliance. When a serious injury or fatality occurs, investigators — whether from OSHA, workers' compensation, or civil litigation — will scrutinize your 300 logs for evidence of whether you knew or should have known about a hazard pattern. A well-maintained log that shows you recorded incidents accurately, identified trends, and implemented corrective actions is powerful evidence of a responsible safety culture.

Conversely, a log riddled with under-recording, late entries, or apparent manipulation tells a story of willful indifference that can dramatically increase your legal and financial exposure. Treat your 300 log not just as a compliance document but as the written record of your organization's commitment to worker safety.