June 10, 2026

OSHA Fatigue Rules and Requirements: What Employers Need to Know in 2026

Key Takeaways: OSHA has no standalone fatigue standard. The General Duty Clause (29 U. S. C. § 654(a)(1)) is the operative requirement. OSHA recognizes fatigue as a serious workplace hazard and publishes guidance at osha.gov/worker-fatigue. Fatigue-related injuries that result in days away from work, restricted duty, medical treatment beyond first aid, or loss of consciousness…

OSHA does not have a specific fatigue standard. What it does have is the General Duty Clause, which requires employers to provide a workplace free from recognized hazards and fatigue qualifies. That distinction matters: employers who assume no dedicated rule means no obligation are exposed to citations, recordable incidents, and preventable injuries.

This guide covers what OSHA fatigue rules actually require, how industry-specific regulations like DOT, FAA, and NRC interact with those requirements, how to document fatigue-related incidents correctly, and how to build a compliant OSHA fatigue management policy.

What Do OSHA Fatigue Rules Actually Require?

OSHA’s authority over workplace fatigue flows entirely through the General Duty Clause, found at 29 U.S.C. § 654(a)(1). The clause requires each employer to furnish “employment and a place of employment which are free from recognized hazards that are causing or are likely to cause death or serious physical harm.”

Fatigue meets that threshold. OSHA’s fatigue page documents that accident and injury rates are 18% higher on evening shifts and 30% higher on night shifts compared to day shifts. Working 12 hours per day is associated with a 37% increased risk of injury. Industrial disasters including the 2005 Texas City BP oil refinery explosion, the Colgan Air crash of 2009, and the nuclear accidents at Chernobyl and Three Mile Island all involved worker fatigue as a contributing factor.

Under the General Duty Clause, OSHA can issue citations when:

A hazard exists in the workplace.
2. The employer knew or should have known about it.
3. The hazard is recognized by the industry as a hazard.
4. A feasible means of abatement exists.

Fatigue satisfies all four criteria in virtually every industry. Understanding OSHA fatigue requirements begins with accepting that the absence of a standalone standard does not mean the absence of obligation.

OSHA Guidance vs. OSHA Requirements

The difference between requirements and recommendations matters for compliance planning.

Required under the General Duty Clause:

Identifying fatigue as a recognized hazard in relevant job classifications
Taking feasible steps to abate the hazard (scheduling controls, rest breaks, staffing adequacy)
Maintaining records of fatigue-related incidents per 29 CFR Part 1904

Recommended but not legally mandated:

Formal Fatigue Risk Management Programs (FRMPs)
Specific scheduling limits outside of industry-specific regulated sectors
Fatigue training programs (though absence of training strengthens a General Duty Clause citation)

OSHA’s prevention guidance recommends that employers examine staffing and workload, arrange schedules to allow rest breaks and nighttime sleep, adjust the work environment for alertness, and provide worker education on fatigue hazards and symptoms. These recommendations are not voluntary in practice: failure to follow them creates documented evidence of knowledge without abatement, which is exactly what OSHA needs to sustain a General Duty Clause citation.

Industry-Specific Regulations That Interact with OSHA Fatigue Rules

The General Duty Clause applies universally. On top of it, several federal agencies have issued prescriptive work-hour rules for their industries. Employers in those sectors must meet both the specific agency requirements and the broader OSHA fatigue requirements.

DOT Hours-of-Service: Commercial Trucking

The FMCSA regulates commercial motor vehicle drivers under 49 CFR Part 395. “Hours of service” sets the maximum time drivers may be on duty and specifies required rest periods.

Key limits for property-carrying drivers:

11 hours of driving after 10 consecutive hours off duty
14-hour driving window from the start of the workday, including all on-duty time
30-minute break required after 8 cumulative hours of driving
60/70-hour rule: No driving after 60 hours on duty in 7 consecutive days, or 70 hours in 8 consecutive days
34-hour restart: Drivers may restart the 60/70-hour clock after 34 or more consecutive hours off duty

Electronic logging devices (ELDs) are required for most carriers to record HOS compliance automatically.

FAA Flight and Duty Time Limits: Aviation

The FAA regulates pilot work hours under 14 CFR Part 117 (airline transport) and Part 135 (on-demand/commuter operations). Under 14 CFR § 121.471, no certificate holder may schedule a flight crewmember to exceed:

1,000 flight hours in any calendar year
100 flight hours in any calendar month
30 flight hours in any 7 consecutive days
8 flight hours between required rest periods

Minimum rest periods range from 9 to 11 consecutive hours depending on scheduled flight time. The FAA’s fatigue rules are among the most prescriptive in U.S. industry, driven directly by the 2009 Colgan Air crash in which pilot fatigue was a primary contributing factor.

NRC Work Hour Controls: Nuclear Power

The Nuclear Regulatory Commission mandates fatigue management for nuclear plant personnel under 10 CFR § 26.205. These controls apply to safety-related workers including senior reactor operators, reactor operators, health physicists, and key maintenance personnel.

Hard limits under 10 CFR 26.205(d)(1):

16 work hours in any 24-hour period
26 work hours in any 48-hour period
72 work hours in any 7-day period
Minimum 34-hour break in any 9-day period

The NRC also requires licensees to schedule work hours “consistent with the objective of preventing impairment from fatigue due to the duration, frequency, or sequencing of successive shifts.” This goes beyond simple hour limits and requires active schedule design with fatigue prevention as the goal.

MSHA: Mining

The Mine Safety and Health Administration (MSHA) governs mining operations under 30 CFR Parts 1-199, rooted in the Federal Mine Safety Act. For underground mining, shifts are generally limited to 8 hours, with exceptions based on operational conditions. Surface mining operations have more scheduling flexibility but remain subject to MSHA’s general safety framework and fatigue-related enforcement.

MSHA does not set a defined limit on consecutive working days but advises against exceeding 8 consecutive days to prevent fatigue accumulation. Mining operators are required to maintain detailed time and payroll records for each miner, which MSHA inspectors review during compliance inspections.

Regulatory Framework Comparison by Industry

OSHA Fatigue Rules and Requirements: What Employers Need to Know in 2026 infographic

Industry	Governing Body	Key Regulation	Work Hour Limit	Required Rest	Enforcement Mechanism
General industry	OSHA	General Duty Clause (29 U.S.C. § 654(a)(1))	No specific limit	No specific requirement	Citation for recognized hazard without abatement
Commercial trucking	FMCSA / DOT	49 CFR Part 395	11 hrs driving / 14-hr window	10 hrs off duty	ELD records, roadside inspections
Aviation	FAA	14 CFR Part 117 / 121 / 135	1,000 hrs/year; 8 hrs between rest	9–11 hrs consecutive	Flight records, certificate actions
Nuclear power	NRC	10 CFR § 26.205	16 hrs/day; 72 hrs/week	34 hrs in any 9 days	License conditions, plant inspections
Mining	MSHA	30 CFR Parts 1–199	8 hrs/shift (underground)	Varies by operation	Mine inspections, payroll audits
Maritime	USCG	46 CFR Part 15	Varies by vessel class	Minimum 6 hrs in 12-hr period	USCG vessel inspections

Employers operating in multiple sectors must manage compliance across both frameworks simultaneously.

State-Level Requirements: Illinois ODRISA

Federal regulations set the floor in most industries, but some states impose stricter rest requirements. Illinois amended its One Day Rest In Seven Act (ODRISA) effective January 1, 2023. The updated law requires employers to provide at least 24 consecutive hours of rest in every calendar week and a 20-minute meal break for shifts of 7.5 hours or more. Employers must post the updated notice and can face penalties for violations. This is one of the more aggressive state-level rest requirements affecting shift work operations.

OSHA does not have a fatigue-specific recordkeeping category. Fatigue-related incidents are recorded under the standard OSHA 300 Log, governed by 29 CFR Part 1904.

An incident is recordable on the OSHA 300 if it is work-related and results in any of the following:

Death
Days away from work
Restricted work or job transfer
Medical treatment beyond first aid
Loss of consciousness
A significant diagnosed condition

For fatigue-related cases, the most common recordable outcomes are injuries caused by impaired judgment or reaction time (slips, falls, equipment incidents), medical conditions worsened by shift work (such as cardiovascular events on duty), and incidents where the worker reported fatigue or fell asleep.

Practical Documentation Steps

Record within 7 calendar days of receiving information about the case (29 CFR 1904.29).
2. Document the circumstances. Use the OSHA 301 Incident Report to capture what the worker was doing, what happened, and what resulted. Note shift length, time since last rest period, and any reported fatigue if relevant.
3. Classify the case correctly. If fatigue contributed to an injury, record the injury type (e.g., “fall to lower level”) and the hours and shift conditions in the description field.
4. Link to your fatigue management records. Keep scheduling data, break logs, and any fatigue assessments in a file attached to the 300 entry. This documentation is your defense in a General Duty Clause investigation.
5. Post the 300A Summary from February 1 through April 30 of the following year, as required by 29 CFR 1904.32.

One practical note: fatigue as a root cause is often under-documented on OSHA 300 logs because supervisors classify incidents by the immediate physical event (the fall, the vehicle contact) rather than the contributing factors. Build fatigue into your incident investigation protocol explicitly.

Building an OSHA-Compliant Fatigue Management Policy

A compliant OSHA fatigue management policy is not a single document. It is an integrated set of practices covering hazard recognition, scheduling, training, incident response, and documentation. The following structure satisfies the General Duty Clause and positions employers well if citations are ever contested.

1. Hazard Recognition and Risk Assessment

Document that your organization recognizes fatigue as a workplace hazard in the job classifications where it is relevant. This should appear in your written safety program. Conduct a fatigue risk assessment that addresses:

Shift length and start times
Rotating schedules and circadian disruption
Commute times and travel requirements
Physical and cognitive demands of the job
Environmental factors (temperature, noise, lighting)

2. Scheduling Controls

Scheduling is the primary lever for OSHA fatigue management and prevention. Effective controls include:

Limiting consecutive night shifts (3 to 4 maximum before a recovery day)
Scheduling forward-rotating shifts (day to evening to night) rather than backward-rotating
Building minimum rest intervals between shifts (at least 11 hours)
Avoiding split shifts and on-call assignments that fragment sleep
Ensuring adequate staffing so overtime is the exception, not the default

3. Work Environment Adjustments

OSHA prevention guidance identifies several environmental controls that reduce fatigue effects:

Lighting: brighter lighting during night shifts supports alertness
Temperature: cooler environments reduce drowsiness
Task rotation: varying tasks reduces monotony and cognitive fatigue
Break frequency: short, frequent breaks outperform longer, infrequent ones for sustained alertness

4. Training Requirements

Training is not legally mandated under a specific OSHA fatigue rule, but its absence creates direct exposure under the General Duty Clause. If OSHA investigates a fatigue-related incident and finds workers were never trained to recognize fatigue symptoms or report concerns, that is evidence the employer failed to abate a recognized hazard.

Effective OSHA fatigue management training covers:

Signs and symptoms of fatigue and sleep deprivation
How fatigue impairs judgment, reaction time, and decision-making
Sleep hygiene and the role of circadian rhythms
Reporting procedures for fatigue concerns before a shift
Employer and employee responsibilities under the fatigue policy

Training should be documented with attendance records, training dates, and the content covered.

5. Incident Investigation and Reporting

Build fatigue into your standard incident investigation checklist. For every recordable incident, capture:

Hours worked in the 24 hours before the incident
Shift start time and shift type (day, evening, night, rotating)
Days worked consecutively
Any reported fatigue or sleepiness prior to the incident
Environmental conditions at the time

This data both improves your root cause analysis and creates a defensible record showing your organization took OSHA fatigue requirements seriously as a causal factor.

6. Documentation and Records

Maintain the following records as part of your OSHA fatigue management program:

Written fatigue hazard policy
Scheduling records showing shift lengths and rest intervals
Training records for all covered employees
Fatigue risk assessments
Incident investigation reports that include fatigue as a variable
OSHA 300 log and 301 incident reports

OSHA can request records going back 5 years under 29 CFR 1904.33. Keep fatigue-related documentation in an organized system accessible to safety personnel.

Beyond Compliance: Why Minimum Requirements Are Not Enough

The General Duty Clause sets a floor, not a ceiling. Employers who design programs around avoiding citations rather than preventing harm will find the floor insufficient. Fatigue is estimated to cost employers $136 billion annually in health-related lost productive work time. That figure does not include direct injury costs, workers’ compensation claims, or turnover driven by unsustainable schedules.

Occupational Medicine (2024) found that fatigued workers are nearly three times more likely to report health-related work impairment compared to non-fatigued workers, and that fatigue independently doubles the risk of health-related job loss when combined with other morbidities.

For organizations operating in safety-critical environments, the regulatory framework around OSHA fatigue rules is also evolving. The NRC’s 10 CFR 26.205 work hour controls, finalized after years of enforcement gaps, and the FAA’s post-Colgan Air reforms both demonstrate that Congress and federal agencies move toward mandatory prescriptive rules when voluntary compliance is inadequate. Organizations that build robust fatigue risk management systems now are ahead of the regulatory trajectory, not just compliant with current OSHA fatigue requirements.

A Fatigue Risk Management System (FRMS) goes beyond scheduling limits. It uses data from near-miss reports, incident investigations, and voluntary employee reporting to continuously improve fatigue controls. Several international standards bodies, including the International Civil Aviation Organization (ICAO) and the International Labour Organization (ILO), publish FRMS frameworks that many U.S. employers use as voluntary reference standards.

Some industries seek exemptions or waivers from prescriptive hours-of-service rules by implementing FRMS programs instead. This approach, common in aviation, replaces rigid hour limits with data-driven fatigue management. Organizations pursuing waivers need to demonstrate that their FRMS provides equivalent or better safety outcomes.

FAQs: OSHA Fatigue Rule

Does OSHA have a specific fatigue rule?

No. OSHA does not have a standalone fatigue standard. Employers are governed by the General Duty Clause (29 U.S.C. § 654(a)(1)), which requires eliminating recognized hazards. OSHA classifies fatigue as a recognized hazard and can issue citations under the General Duty Clause when employers fail to address it.

Yes. OSHA can issue General Duty Clause citations with penalties when a fatigue-related incident occurs and OSHA determines the employer knew about the hazard and failed to take feasible abatement steps. Willful violations carry penalties up to $161,323 per violation (2026 adjusted amounts). Serious violations carry penalties up to $16,131 per violation.

Do I have to record fatigue on the OSHA 300 log?

Fatigue itself is not a recordable category. However, any work-related injury or illness resulting from fatigue that meets the 29 CFR 1904.7 criteria (days away from work, medical treatment beyond first aid, restricted duty, loss of consciousness, or death) must be recorded. Document shift conditions and fatigue as contributing factors in the incident description.

What industries have mandatory fatigue rules beyond OSHA’s General Duty Clause?

Commercial trucking (FMCSA, 49 CFR Part 395), aviation (FAA, 14 CFR Parts 117, 121, 135), nuclear power (NRC, 10 CFR § 26.205), mining (MSHA, 30 CFR Parts 1-199), and maritime (USCG, 46 CFR Part 15) all have prescriptive work-hour rules that apply in addition to OSHA’s general obligations.

What should a fatigue management policy include?

At minimum: a written hazard recognition statement, scheduling controls with documented rest intervals, environmental adjustments, training with attendance records, an incident investigation protocol that captures fatigue-related variables, and OSHA 300 recordkeeping tied to your fatigue documentation. See the FRMS guide for a full framework.

Take Action

OSHA fatigue compliance is not a one-time document review. It requires scheduling systems, training programs, incident investigation protocols, and ongoing monitoring. NightOwling works with organizations to assess their current fatigue risk exposure and build programs that meet OSHA General Duty Clause requirements and go beyond them.

Explore solutions for organizations or schedule a consultation to discuss your organization’s fatigue management needs.

OSHA Fatigue Rules and Requirements: What Employers Need to Know in 2026