How Often Is LOTO Training Required: Triggers and Penalties

OSHA does not require lockout/tagout training on any fixed calendar. There is no annual refresher rule. Under 29 CFR 1910.147, an employer must train each covered employee once before they work on or near equipment with hazardous energy, and then retrain only when a specific event makes the existing training inadequate.¹ So the honest answer to how often LOTO training is required is: once at the start, and again whenever something changes that makes the first round insufficient.

Initial Training Comes Before Any Covered Work

Every employee covered by the standard has to be trained before they perform lockout/tagout tasks or work in an area where those tasks happen. The employer has to be able to show the employee understands the energy control program, knows their role in it, and can safely apply or recognize energy control devices. No one should be doing this work, or standing next to it, without that training complete and documented.¹

Missing the initial training is one of the easiest violations for an inspector to find, and LOTO consistently sits in OSHA’s top 10 most frequently cited standards.²

What Triggers Retraining

Because the standard is performance-based rather than calendar-based, retraining is tied to events. If none of these happen, no retraining is due.

A change in job assignment. An employee’s duties shift in a way that alters their LOTO responsibilities. An affected employee who begins doing maintenance, for example, has to be retrained as an authorized employee.
A new hazard from equipment or process changes. New machinery, modified equipment, or a changed process introduces something the original training did not cover.
A change in the energy control procedure itself. When the written procedure is revised, everyone who works to that procedure has to be retrained on the new version.
Deficiencies found during a periodic inspection. If the annual inspection reveals that an employee is deviating from the procedure or does not understand their responsibilities, the employer has to retrain that employee.

A fifth trigger is broader: the employer must retrain whenever there is reason to believe an employee’s knowledge is inadequate, even outside a formal inspection. Watching an employee skip a verification step or misidentify an energy source would be enough.³

The inspection-driven trigger is the one that catches employers off guard. The annual review exists precisely to surface gaps, and when it does, retraining is required right away, not at some later convenient point.¹

The Annual Periodic Inspection Is Not Annual Training

Most of the confusion about LOTO training frequency comes from mixing up two different obligations. Employers must inspect each energy control procedure at least once a year. That inspection is a review of how the procedure is being applied in practice. It is not a training session, though it can generate a training obligation if problems turn up.¹

During the inspection, an authorized employee who was not part of the work being inspected observes a representative sample of workers performing the procedure. The inspector then reviews each authorized employee’s responsibilities. If tagout is used instead of lockout, that review extends to affected employees as well.⁴

The inspection has to be certified in a record that includes the machine or equipment covered, the date, the employees involved, and the name of the person who performed it.⁴ Many employers fold voluntary refresher training into the annual inspection because the logistics line up, but the standard itself does not require it.

Who Needs Training, and How That Affects Timing

The standard splits covered workers into three groups. The categories matter for frequency because a change of category triggers retraining under the job-assignment rule.

Authorized employees are the ones who actually lock out or tag out machines to perform servicing or maintenance. Their training is the most detailed because they interact directly with energy-isolating devices.
Affected employees operate the equipment being serviced or work in the area where lockout/tagout is taking place. They do not perform the lockout themselves.
Other employees are anyone else who works where energy control procedures might be used. Their training is limited but still required.

These categories are not permanent. An affected employee whose duties expand to include servicing or maintenance becomes an authorized employee and needs the fuller training that role requires.¹

Temporary workers get counted the same way. Staffing agencies and host employers share responsibility, and OSHA can cite either one. In practice the agency handles general safety orientation, and the host employer provides the site-specific LOTO training tied to the actual equipment. The host has to treat temporary workers exactly like permanent employees for training and safety purposes.⁵

Certifying That Training Is Current

Employers have to certify that LOTO training has been completed and is current. The certification must include each employee’s name and the dates of training.¹ The standard does not prescribe a format. Paper sign-in sheets, learning management system records, and electronic badge systems all work, provided the records are readily available to the employer, employees, and OSHA on inspection.⁶

If you use an electronic method like badge swiping, the system has to include a component that actually certifies the training occurred. Logging that someone swiped a badge near a training room is not enough. The standard also does not set a minimum retention period, but keeping records for the length of each employee’s employment is the practical approach, because an inspector can ask for them at any time.

Penalties for Missing Training or Retraining

LOTO violations carry real financial consequences. As of the January 2025 adjustment, OSHA can assess up to $16,550 per serious violation and up to $165,514 per willful or repeat violation. Failure-to-abate penalties can reach $16,550 per day the hazard remains uncorrected.⁷ Those figures are adjusted annually for inflation.

Training and periodic inspection failures are among the most commonly cited pieces of the LOTO standard. Not documenting training, skipping the annual periodic inspection, and failing to retrain after a procedural change are all citable. Inspectors know where to look.²

Workplaces the Standard Does Not Cover

The training rules above apply to general industry. 29 CFR 1910.147 does not cover construction, agriculture, maritime (shipyard, longshoring, and marine terminals), electric utility installations, or oil and gas well drilling and servicing. Those industries have their own energy control requirements under separate OSHA standards, and the frequency answers there can differ.⁸

Two exclusions within general industry are worth knowing before you count someone as needing training. Cord-and-plug equipment does not require formal lockout if the employee unplugs the machine and keeps the plug under their exclusive control during the work. Minor tool changes and adjustments during normal production also fall outside the standard, but only if the work is routine, repetitive, integral to production, and the employer uses alternative protective measures.⁸

1
eCFR. 29 CFR 1910.147 – The Control of Hazardous Energy (Lockout/Tagout)
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Occupational Safety and Health Administration. Top 10 Most Frequently Cited Standards
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Occupational Safety and Health Administration. 29 CFR 1910.147, the Control of Hazardous Energy (Lockout/Tagout) – Inspection Procedures and Interpretive Guidance
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Occupational Safety and Health Administration. Lockout/Tagout eTool – Periodic Inspections
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Occupational Safety and Health Administration. Protecting Temporary Workers
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Occupational Safety and Health Administration. Electronic Certification of Training
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Occupational Safety and Health Administration. OSHA Penalties
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Occupational Safety and Health Administration. 1910.147 – The Control of Hazardous Energy (Lockout/Tagout)