Lockout Tagout Training Requirements: What Every EHS Manager Needs to Know

Last Updated: March 2026

Every year, roughly 3,000 workers in the United States suffer lost-time injuries from contact with hazardous machinery during servicing and maintenance. About 60 of those incidents are fatal. OSHA estimates that full compliance with lockout/tagout procedures could prevent 50,000 injuries and 120 deaths annually — making it one of the highest-impact safety standards on the books.

Despite those numbers, OSHA’s lockout/tagout standard (29 CFR 1910.147) logged 2,443 violations in fiscal year 2024, climbing from sixth to fifth on OSHA’s Top 10 most cited standards list. Training deficiencies are among the most common citations.

If you’re an EHS manager responsible for maintaining compliance, this guide breaks down exactly what OSHA’s lockout tagout training requirements demand, who needs what level of training, and how to build a program that holds up under inspection.

What OSHA Requires: The Legal Foundation

The control of hazardous energy standard, 29 CFR 1910.147, applies to general industry workplaces where employees service or maintain machines and equipment that could unexpectedly energize, start up, or release stored energy during maintenance work.

The standard requires employers to establish an energy control program with three core components:

1. Written energy control procedures for each machine or piece of equipment

2. Employee training on those procedures

3. Periodic inspections to verify that procedures are followed correctly

Training isn’t optional and it isn’t a one-time event. OSHA requires initial training before employees work under lockout/tagout conditions, plus retraining whenever circumstances change.

Three Employee Categories, Three Training Levels

One of the most common compliance mistakes is treating all employees the same. OSHA defines three distinct categories of workers under 1910.147, and each category has different training requirements.

Authorized Employees

Authorized employees are the workers who actually perform the lockout or tagout. They lock out machines, verify zero-energy states, and perform the servicing or maintenance work.

Their training must cover:

• Hazardous energy recognition — Identifying all energy sources (electrical, mechanical, hydraulic, pneumatic, chemical, thermal, gravitational) present in the machines they service
• Type and magnitude of energy — Understanding how much energy is stored or flowing and what would happen if it were released
• Methods of energy isolation and control — How to isolate each energy source, apply locks or tags, and follow the written procedure step by step
• Verification of isolation — How to confirm that the machine is truly de-energized before beginning work (try-start procedures, voltage testing, pressure gauge checks)

This is the most rigorous training tier. Authorized employees need to understand not just the “how” but the “why” behind every step.

Affected Employees

Affected employees operate or use machines that will be locked out, but they don’t perform the lockout themselves. A machine operator whose press is being serviced by a maintenance technician is an affected employee.

Their training must cover:

• Purpose of the energy control procedure — Why lockout/tagout exists and what it protects against
• Recognition that lockout/tagout is in progress — Identifying locks, tags, and other indicators that a machine is under energy control
• The prohibition against tampering — Understanding that they must never attempt to restart, re-energize, or remove any lockout/tagout device

Affected employee training is less technical than authorized employee training, but it’s no less critical. An affected employee who restarts a locked-out machine can cause a fatality.

Other Employees

“Other employees” is OSHA’s term for anyone who works in an area where lockout/tagout may be in use but who is neither authorized nor affected. This often includes supervisors, janitorial staff, contractors walking through the area, or employees from adjacent work areas.

Their training must cover:

• Awareness that energy control procedures exist in the facility
• The prohibition against attempting to restart locked-out or tagged-out equipment
• Recognition of lockout/tagout devices — Knowing what locks and tags look like and what they mean

This training can be brief, but it must happen. OSHA has cited employers for failing to train “other employees” — it’s not a gray area.

When Retraining Is Required

Initial training gets employees started, but OSHA doesn’t consider it sufficient forever. Under 1910.147(c)(7)(iii), retraining is required whenever:

• An employee’s job assignment changes in a way that involves new machines or energy control procedures
• Machines, equipment, or processes change in ways that create new hazards or alter existing energy control procedures
• A periodic inspection reveals deficiencies in an employee’s knowledge or application of lockout/tagout procedures
• There is reason to believe that any employee does not understand or follow the energy control procedures

That last point is broader than it sounds. If a supervisor observes an authorized employee skipping the try-start verification step, that’s grounds for retraining — not just for that employee, but potentially for everyone trained on the same procedure.

These findings align with an independent study by Central Washington University, which found that VR safety training significantly improves comprehension and 30-day knowledge retention. 100% of participants said VR improved their understanding of safety procedures.

Retraining must re-establish employee proficiency and introduce any new or revised control methods and procedures.

The Periodic Inspection Requirement

Training and inspections are tightly linked under the standard. OSHA requires a periodic inspection of each energy control procedure at least once per year (29 CFR 1910.147(c)(6)).

Key requirements for periodic inspections:

• Must be performed by an authorized employee other than the one(s) using the procedure being inspected
• Must include a review between the inspector and each authorized employee on their responsibilities under the procedure
• If tagout is used (rather than lockout), the review must also include each affected employee
• Must identify and correct any deviations or inadequacies found
• Must be certified — documenting the machine inspected, the date, employees included, and the person who performed the inspection

Periodic inspections are where training gaps surface. If an inspector finds that authorized employees can’t articulate the correct sequence for isolating energy on a machine, retraining is triggered. Smart EHS managers use annual inspections as a built-in quality check on their training program.

Tagout-Only Programs: Additional Requirements

When energy-isolating devices cannot accept a lock (older equipment without lockable disconnects, for example), employers may use tagout as the primary means of energy control. However, OSHA holds tagout-only programs to a higher standard because tags alone provide less protection than physical locks.

If you rely on tagout in any part of your program, you must provide:

• Additional training beyond what lockout programs require, ensuring employees understand the limitations of tags (a tag is a warning device, not a physical restraint)
• More rigorous periodic inspections to verify that tagout procedures are being followed precisely
• Demonstration that the tagout program provides equivalent protection to a full lockout program

The practical takeaway: if your equipment can physically accept a lock, use lockout. It’s simpler to comply, easier to train, and far more protective.

Documentation and Certification

OSHA requires employers to certify that training has been accomplished and is being kept current. At minimum, your documentation should include:

• Employee name
• Date of training
• Training content (which procedures, which energy sources, which machines)
• Trainer name and qualifications

For periodic inspections, you need separate certification records documenting:

• Machine or equipment on which the procedure was inspected
• Date of inspection
• Employees included in the inspection
• Person performing the inspection

Keeping both sets of records organized isn’t just a compliance exercise — it’s your primary defense if OSHA comes through the door. Inspectors will ask for training records and periodic inspection certifications by name, and gaps in documentation are treated the same as gaps in training.

Common LOTO Training Failures (and Their Costs)

Understanding what goes wrong helps you build a stronger program. Here are the training-related mistakes that generate the most OSHA citations:

No written procedures for specific machines. Without machine-specific procedures, training has nothing concrete to reference. Employees can’t be trained on generic “lockout concepts” alone — they need to know the exact steps for each machine they service. This is the most commonly cited subsection: 29 CFR 1910.147(c)(4).

Training that doesn’t differentiate employee categories. Running every employee through the same one-hour PowerPoint violates the standard. Authorized employees need hands-on, machine-specific training. Affected employees need different content. Treating them identically creates both compliance risk and safety risk.

No retraining after equipment changes. Installing a new press, adding a conveyor line, or modifying hydraulic systems on existing equipment all trigger retraining obligations. EHS managers who don’t have a process for flagging equipment changes to the training program get caught on this regularly.

Skipping periodic inspections. If you can’t produce annual inspection certifications for every energy control procedure in your facility, expect a citation. At penalties up to $16,550 per serious violation (as of January 2025) — or $165,514 for willful violations — the financial exposure adds up fast.

The stakes can be much higher. In one case, a cookie dough manufacturer was fined $782,526 for lockout/tagout violations, including failure to properly train authorized and affected employees.

Building a Training Program That Works

Compliance is the floor, not the ceiling. The best LOTO training programs go beyond checking regulatory boxes to actually change behavior on the shop floor.

Start with a complete energy source audit. Before you can train anyone, you need to identify every energy source on every machine that falls under the standard. Walk the floor with your maintenance team and document electrical, mechanical, pneumatic, hydraulic, thermal, chemical, and gravitational energy sources for each piece of equipment.

Write machine-specific procedures. Each machine gets its own written procedure with the exact sequence of steps for shutdown, isolation, lockout/tagout device application, stored energy release, and verification. Generic procedures don’t cut it.

Use hands-on training, not just classroom sessions. OSHA’s standard emphasizes that authorized employees must understand how to actually perform each step — recognition of hazards, isolation methods, and verification. Classroom lectures alone don’t build that competence. Walk employees through the procedure on the actual machine. Have them demonstrate proficiency before signing off.

Train to the role, not to the room. Authorized, affected, and other employees get different training because they have different responsibilities. Differentiate your curriculum and track which employees fall into which category for each machine.

Build retraining triggers into your change management process. Whenever maintenance installs new equipment, modifies existing machinery, or changes a work process, that change should automatically flag a review of affected LOTO procedures and trigger retraining as needed.

Use periodic inspections as training opportunities. Annual inspections aren’t just audits — they’re one-on-one conversations between inspectors and authorized employees about procedure specifics. Treat them as refresher training built into your compliance calendar.

Emerging approaches like VR-based training simulations allow employees to practice lockout/tagout procedures on virtual equipment before working on real machines — building muscle memory and procedural confidence without exposure to actual hazardous energy. This is especially valuable for high-consequence procedures where mistakes during live training carry real risk.

Key Takeaways for EHS Managers

• OSHA requires lockout/tagout training for three distinct employee categories, each with different content requirements
• Training must be machine-specific and based on your facility’s written energy control procedures
• Retraining is required after job changes, equipment changes, inspection findings, or any reason to believe an employee doesn’t understand the procedures
• Annual periodic inspections are mandatory for every energy control procedure and must be documented
• Training records and inspection certifications must be maintained — gaps in documentation equal gaps in compliance
• Penalties for LOTO violations can reach $16,550 per serious violation and $165,514 per willful violation as of 2025

Lockout/tagout isn’t the most glamorous part of your EHS program, but it may be the most consequential. With hazardous energy causing 190 deaths in 2023 alone, getting training right isn’t just about passing an audit — it’s about making sure everyone goes home at the end of the shift.

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*Need to evaluate how your LOTO training program stacks up? See how VR-based safety training can strengthen procedural compliance — request a demo at humulo.com/enterprise-vr-training/.*

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Related: VR Lockout Tagout Training: Practice LOTO Procedures Without the Risk

Related: VR safety training vs e-learning comparison — see how VR stacks up against e-learning on cost, retention, and ROI.

Warehouse and distribution facilities often underestimate their LOTO obligations — conveyor systems, balers, and dock levelers all require energy isolation procedures. For a closer look at warehouse-specific training, see our VR warehouse safety training guide.

Related reading: Which OSHA standards accept VR training and how to stay compliant