OSHA's 8-Hour and 24-Hour Reporting Rules, Explained (29 CFR 1904.39)

A worker on your crew is rushed to the emergency room after a fall. The ER team runs scans, monitors him for a few hours, stitches a laceration, and sends him home that evening. Do you have to call OSHA?

No — not on those facts. An emergency room visit, even one involving hours of observation and diagnostic testing, is not an "in-patient hospitalization" under OSHA's reporting rule. But change one detail — the hospital formally admits him for care or treatment — and the 24-hour reporting clock starts immediately.

That distinction, and several others like it, is what 29 CFR 1904.39 is built on. It is the rule that governs when you must pick up the phone and tell OSHA something serious happened, and it operates on a much shorter timeline than the rest of your recordkeeping obligations. Get it wrong and the failure-to-report citation is one of the easiest violations for OSHA to prove, because the agency knows exactly when it was notified and exactly when the incident occurred.

This post is the complete walkthrough: the two reporting clocks, the definitions that catch employers off guard, the time windows nobody reads, how to actually make the report, and what happens after you do.

The Two Clocks

Section 1904.39(a) establishes two deadlines that depend entirely on the severity of the outcome.

The eight-hour clock, from 1904.39(a)(1):

Within eight (8) hours after the death of any employee as a result of a work-related incident, you must report the fatality to the Occupational Safety and Health Administration (OSHA), U.S. Department of Labor.

The twenty-four-hour clock, from 1904.39(a)(2):

Within twenty-four (24) hours after the in-patient hospitalization of one or more employees or an employee's amputation or an employee's loss of an eye, as a result of a work-related incident, you must report the in-patient hospitalization, amputation, or loss of an eye to OSHA.

The memory aid is simple: 8 hours for a death; 24 hours for a hospitalization, an amputation, or the loss of an eye. Note that the 24-hour rule applies to a single in-patient hospitalization — it used to require three or more, but OSHA dropped that threshold years ago. One admitted employee triggers the obligation.

Reporting Applies to Everyone — Even Employers Exempt From the 300 Log

This is the single most important point for small employers to internalize, because it is so often missed. The partial exemptions from routine recordkeeping — the size exemption and the industry exemption — do not exempt you from severe-injury reporting. Subpart B of Part 1904 says so directly:

All employers, including those partially exempted by reason of company size or industry classification, must report to OSHA any employee's fatality, in-patient hospitalization, amputation, or loss of an eye (see § 1904.39).

A six-person landscaping company that has never kept a 300 Log in its life still has to call OSHA within 8 hours of a work-related death and within 24 hours of an amputation. A small accounting firm in a partially exempt NAICS code is under the same obligation. Reporting is a baseline duty for virtually every private-sector employer under OSHA's jurisdiction, regardless of size or industry.

"In-Patient Hospitalization": The ER Trap

The most common reporting mistake is assuming any serious-looking hospital visit must be reported. The rule is narrower than that. OSHA defines the term at 1904.39(b)(9):

OSHA defines in-patient hospitalization as a formal admission to the in-patient service of a hospital or clinic for care or treatment.

And it carves out the most common false positive at 1904.39(b)(10):

You do not have to report an in-patient hospitalization that involves only observation or diagnostic testing. You must only report to OSHA each in-patient hospitalization that involves care or treatment.

Two conditions have to be met: a formal admission to the in-patient service, and an admission for care or treatment. An emergency room visit is not a formal in-patient admission, no matter how long it lasts or how many tests are run. An overnight stay purely for observation or diagnostics is not reportable either. OSHA's own reporting page states it plainly: treatment in an emergency room only is not reportable. The trigger is the moment a hospital admits the worker as an in-patient to treat them — not the moment they walk through the ER doors.

This is genuinely useful to know, because it keeps you from over-reporting incidents that don't meet the threshold while making sure you catch the ones that do.

"Amputation": Fingertips Count — Here's What's Excluded

Amputation reporting trips employers up in the other direction: they assume it only means losing a whole finger or limb. OSHA's definition at 1904.39(b)(11) is broader, and it spells out the exclusions:

An amputation is the traumatic loss of a limb or other external body part. Amputations include a part, such as a limb or appendage, that has been severed, cut off, amputated (either completely or partially); fingertip amputations with or without bone loss; medical amputations resulting from irreparable damage; amputations of body parts that have since been reattached. Amputations do not include avulsions, enucleations, deglovings, scalpings, severed ears, or broken or chipped teeth.

The two surprises here are worth pulling out. First, a fingertip amputation is reportable even with no bone loss — if tissue is traumatically severed, it counts. Second, a part that is later surgically reattached is still a reportable amputation — the reattachment doesn't undo the reporting duty. On the other side, deglovings, scalpings, severed ears, and knocked-out teeth are specifically not amputations for reporting purposes. (An enucleation — removal of the eye — is excluded from the amputation definition because it's separately covered as a "loss of an eye.")

These excluded injuries may still be recordable on your 300 Log even though they aren't reportable to OSHA. Reporting and recording are different questions, which is a theme we'll come back to.

The Time Windows Nobody Reads

The deadlines have a second dimension that catches even careful employers: the outcome has to occur within a defined window of the incident to be reportable at all. From 1904.39(b)(6):

You must only report a fatality to OSHA if the fatality occurs within thirty (30) days of the work-related incident. For an in-patient hospitalization, amputation, or loss of an eye, you must only report the event to OSHA if it occurs within twenty-four (24) hours of the work-related incident.

Read that carefully, because it does two things. A fatality is reportable only if death occurs within 30 days of the incident — if a worker is injured today and dies of those injuries 45 days from now, the death is not reportable (though you'd record it and update the log). And a hospitalization, amputation, or loss of an eye is reportable only if it occurs within 24 hours of the incident. A worker hospitalized a week after the underlying event falls outside the reporting requirement.

Then there's the question of when your clock starts. Per 1904.39(b)(7), if you don't learn of the event when it happens, the deadline runs from when the event "is reported to you or to any of your agent(s)" — eight hours for a fatality, 24 hours for the others. And 1904.39(b)(8) applies the same logic to work-relatedness: the clock runs from when you or your agent learn that the event was work-related. So a supervisor learning of a hospitalization on Monday morning starts your 24-hour window Monday morning, even if the underlying incident was Friday.

One more situation that comes up: heart attacks. Under 1904.39(b)(5), a work-related fatality or in-patient hospitalization caused by a heart attack must be reported, and the local OSHA Area Office director decides whether to investigate based on the circumstances. Don't assume a cardiac event is automatically outside the rule.

The Motor Vehicle and Public Transportation Exceptions

Two categories of incident are reportable-exempt but still recordable, and the distinction matters. From 1904.39(b)(3), on motor vehicle accidents:

If the motor vehicle accident occurred in a construction work zone, you must report the fatality, in-patient hospitalization, amputation, or loss of an eye. If the motor vehicle accident occurred on a public street or highway, but not in a construction work zone, you do not have to report the fatality, in-patient hospitalization, amputation, or loss of an eye to OSHA. However, the fatality, in-patient hospitalization, amputation, or loss of an eye must be recorded on your OSHA injury and illness records, if you are required to keep such records.

And 1904.39(b)(4), on public transportation:

No, you do not have to report the fatality, in-patient hospitalization, amputation, or loss of an eye to OSHA if it occurred on a commercial or public transportation system (e.g., airplane, train, subway, or bus). However, the fatality, in-patient hospitalization, amputation, or loss of an eye must be recorded on your OSHA injury and illness records, if you are required to keep such records.

The principle to carry away: not reportable does not mean not recordable. A worker killed in a highway crash while driving for work outside a construction zone — you skip the 8-hour call, but the fatality still goes on your 300 Log if you keep one. Both exceptions say the same thing.

How to Report — Three Methods and the Information You'll Need

Once you've determined an event is reportable, 1904.39(a)(3) gives you three ways to do it:

(i) By telephone or in person to the OSHA Area Office that is nearest to the site of the incident. (ii) By telephone to the OSHA toll-free central telephone number, 1-800-321-OSHA (1-800-321-6742). (iii) By electronic submission using the reporting application located on OSHA's public Web site.

The toll-free line, 1-800-321-6742, runs 24 hours. The online reporting application lives on OSHA's website at osha.gov/report. One method you cannot use: if the Area Office is closed, 1904.39(b)(1) prohibits leaving a voicemail, faxing, or emailing the Area Office to satisfy the deadline — you use the 800 number or the online application instead.

Have this information ready before you call. Per 1904.39(b)(2) and OSHA's reporting page, you'll be asked for:

• The establishment name
• The location of the work-related incident
• The time of the work-related incident
• The type of reportable event (fatality, in-patient hospitalization, amputation, or loss of an eye)
• The number of employees who suffered the event
• The names of the affected employees
• Your contact person and their phone number
• A brief description of the work-related incident

Reporting vs. Recording: Two Duties, Two Deadlines

It's worth stating directly, because conflating the two is a frequent and costly error. Reporting under 1904.39 is the urgent phone call — 8 hours or 24 hours. Recording under 1904.7 and 1904.29 is putting the case on your 300 Log, which you have seven calendar days to do after learning a recordable case occurred.

A reportable event is almost always also recordable — a fatality, an amputation, a hospitalization all meet the general recording criteria. But meeting one obligation does not satisfy the other. You can be cited for failing to report even if you recorded the case perfectly, and vice versa. They run on separate tracks with separate clocks, and an inspection can find you in violation of either or both. If you need the recording side, our step-by-step 300 Log guide covers the mechanics, and the recordability decision tree covers whether a case belongs on the log at all.

What Happens After You Report: Inspection or Rapid Response Investigation

Reporting an event doesn't automatically mean an inspector shows up at your door. Under OSHA's current enforcement procedures for 1904.39 reports, the Area Director triages each report into one of two paths: an on-site inspection, or a Rapid Response Investigation (RRI).

If your report is selected for an on-site inspection, OSHA conducts a physical inspection of the worksite, much like any programmed or complaint inspection. Fatalities and certain severe events are far more likely to draw an on-site visit.

If your report is handled as an RRI, OSHA generally does not come on site. Instead, the agency sends a letter — often a Non-Mandatory Investigation letter — asking you to investigate the incident yourself, identify the root cause, describe your corrective actions, and report back, usually within a few days. The RRI is faster and less intrusive, but treat it seriously: what you submit becomes part of OSHA's file, and the agency can conduct monitoring inspections of closed RRIs on a randomized basis. Anything you tell OSHA in an RRI can inform later enforcement, so your internal investigation should be accurate and your abatement real.

Failure-to-Report Penalties Are Real

A late or missed report is typically cited as an other-than-serious violation, currently capped at $16,550 per violation. That may look modest next to a serious hazard citation — but it rarely arrives alone, and OSHA has materially raised the stakes on these reports in recent years. The agency's enforcement guidance sets an elevated established penalty for failure-to-report violations specifically to create deterrence, and a 1904.39 failure is one of the factors that can cause OSHA to withhold good-faith penalty reductions on the other citations in the same inspection. The late phone call quietly raises the price of everything else the inspector finds.

A concrete example. In May 2024, OSHA cited Circles of Care, Inc., a Florida behavioral health operator, after a mental health technician was hospitalized following a patient assault on November 7, 2023. Among the citations was an other-than-serious violation of 29 CFR 1904.39(a)(2): per the citation, "the employer failed to report to OSHA within 24-hours a work-related in-patient hospitalization of an employee. The employer notified OSHA on November 9, 2023." The reporting line item was a small piece of a total proposed penalty of $101,397 — most of which came from a repeat workplace-violence citation — but it illustrates the pattern. The failure to report sat inside a six-figure enforcement action, and OSHA could prove it with two dates.

Research bears out that under-reporting is widespread. A 2025 peer-reviewed study linking Illinois hospital records to OSHA's reporting data identified thousands of serious occupational injuries and illnesses, and well over a hundred fatalities, treated in hospitals over a several-year span that were never reported to OSHA. Failure-to-report isn't a theoretical risk — it's a known enforcement gap the agency is actively working to close. The broader pattern of citation-generating recordkeeping errors is covered in 5 OSHA recordkeeping mistakes that lead to citations.

State-Plan States: Don't Assume the Federal Clock

If you operate in a state that runs its own OSHA-approved plan, your reporting rules may be stricter than the federal 8/24-hour framework. State plans must be at least as effective as federal OSHA and can impose additional or more stringent requirements.

California is the clearest example. Cal/OSHA, under 8 CCR 342 and Labor Code sections 6302 and 6409.1, requires employers to report a "serious injury or illness" immediately, and no longer than 8 hours — there is no separate 24-hour track for hospitalizations. Amendments effective January 1, 2020 broadened the definition: California eliminated the old requirement that a hospitalization last more than 24 hours to be reportable, added "loss of an eye" as a triggering event, and includes "serious degree of permanent disfigurement" within its serious-injury definition. California also attaches a statutory penalty floor — Labor Code section 6409.1(b) provides that an employer who violates the reporting requirement may be assessed a civil penalty of not less than $5,000.

Washington and Oregon also run state plans with their own reporting thresholds and timeframes that can differ from the federal rule. The practical guidance is simple: if you're in a state-plan state, treat the federal 8/24-hour rule as a floor and confirm your specific state's reporting deadlines and definitions before you need them. Don't reconstruct the rule during an emergency.

Common Employer Mistakes

Five errors account for most reporting failures:

1. Treating an ER visit as a hospitalization. Only a formal in-patient admission for care or treatment is reportable. Don't over-report ER-only visits — and don't assume a long ER stay counts.
2. Waiting to confirm work-relatedness before reporting. The clock starts when you learn the event is work-related, and OSHA would rather receive a prompt preliminary report than a late perfect one. When in doubt, report.
3. Reporting to the wrong entity. Notifying your workers' comp carrier is not notifying OSHA. In a state-plan state, federal OSHA may not be the right office at all. Know who you're supposed to call.
4. Not knowing the 30-day fatality window. A death that occurs more than 30 days after the incident isn't reportable — but a death within 30 days is, even if weeks have passed since the injury.
5. Assuming exempt-from-recordkeeping means exempt-from-reporting. It doesn't. Subpart B makes reporting universal across covered employers regardless of size or industry.

One structural note for multi-site and contingent-workforce employers: the duty to report follows day-to-day supervision the same way the duty to record does. For a temporary or staffing-agency worker, the employer that provides day-to-day supervision makes the report — a point we cover in depth in who records a temp worker's injury. And for multi-establishment operations, the one-log-per-location rules interact with how you track and route a report.

The events most likely to trigger these reports — heat stroke, severe falls, machine injuries — are also the ones most likely to draw an inspection that scrutinizes your whole program. Our walkthrough of what happens when OSHA shows up under the Heat NEP shows how a single reportable event can open the door to a comprehensive inspection, and the heat recordability guide covers when a heat case crosses the hospitalization line.

This post is general compliance information, not legal advice. Verify current regulatory text against eCFR and your state plan's requirements.