What Are the LOTO Tag Requirements and Limitations?

Clear communication is essential to keeping workers informed about potential electrical hazards, especially during maintenance or repair tasks. LOTO tags, or lockout tagout tags, are a key part of this, providing clear warnings and information during hazardous energy control procedures. Typically made of durable, industrial-grade plastic, LOTO tags are attached to energy-isolating devices to indicate that machinery is secured in a safe or OFF position. These tags help communicate who applied the lockout, when, and why.

In one OSHA-reported incident, a 38-year-old worker at a forklift parts manufacturer in Cullman, Alabama, died after being caught in a molding machine. The investigation found that the company failed to follow required safety protocols, including proper machine guarding and lockout tagout procedures. This case highlights how failures across an energy-control program can leave workers exposed during servicing work.

In the next section, we’ll break down the specific requirements for LOTO tags, including what they must contain, when they can be used, and what their limitations are under OSHA and ANSI standards.

Key Takeaways

• Lockout tagout tags must be used along with energy-isolating devices unless locking is not feasible and equivalent protection is proven.

• OSHA requires tagout devices to be durable, standardized, substantial, identifiable, and used only for energy control.

• Incomplete or mislabeled LOTO tags can lead to serious incidents due to misunderstandings about equipment status.

• A tag must identify the employee applying it and include an appropriate warning legend. Departments, dates, times, job details, and equipment information are common facility fields, not universal OSHA requirements.
  

OSHA Requirements for Tagout Devices

The Occupational Safety and Health Administration (OSHA) defines the minimum performance requirements in its standard 29 CFR 1910.147, titled The Control of Hazardous Energy, for both the tagout device itself and the way it is identified and attached. The table below separates those requirements from details that OSHA does not universally prescribe and information many facilities add to support their own procedures.

Singularly Identified and Standardized

Lockout tagout devices must be singularly identified, used only to control energy, and not used for other purposes. Within a facility, these devices must also be standardized in at least one of these ways: color, shape, or size. For tagout devices, the print and format must also be standardized.

Durable

Tagout devices must be built and printed in such a way that exposure to weather or damp environments does not cause the lockout tag to deteriorate or the message on the lockout tag to become unreadable. When utilized in corrosive conditions, such as locations where acid and alkali chemicals are handled and stored, tags must not also deteriorate.

Substantial

Tagout devices, including their attachment methods, must be sturdy enough to prevent removal through excessive force. Tagout device attachment methods must be non-reusable and attachable by hand. It should also be non-releasable with a minimum unlocking strength of 50 pounds and be designed in a way that is comparable to a durable nylon cable tie that can be used in all types of environments.

Identifiable

Lockout/tagout tags must have the identity of the employee who applied them, and tagout devices must also provide warnings of hazardous conditions and include a clear legend to prevent machines or equipment from starting or operating. This includes legends such as “Do Not Start,” “Do Not Open,” “Do Not Close,” “Do Not Energize,” and “Do Not Operate.”

Tags must also be securely attached to the hazard, as close as possible, using attachment means at least equivalent in strength and durability to a one-piece, all-environment-tolerant nylon cable tie.

Failure to follow lockout tagout regulations can result in serious consequences, including OSHA citations. For penalties assessed after January 15, 2026, the federal maximum is $16,550 per serious violation and $165,514 per willful or repeated violation. State-plan penalty amounts may differ. 

Are LOTO Tags Required in Lockout/Tagout Procedures?

It depends on the energy-isolating device and the system the employer uses. If the device cannot be locked out, OSHA requires a tagout system. If it can be locked out, OSHA 29 CFR 1910.147 requires lockout unless the employer demonstrates that tagout provides equivalent employee protection. In that exception, the tag is attached where the lock would have been attached and additional safety measures are needed. When a tagout device is used, it must clearly indicate that moving the energy-isolating device from the safe or OFF position is prohibited. OSHA estimates that compliance with the Lockout/Tagout standard prevents about 120 fatalities and 50,000 injuries each year. 

ANSI Requirements for Tagout Devices

While OSHA establishes enforceable requirements for lockout tagout, the American National Standards Institute (ANSI)  provides additional guidance on the design and presentation of safety tags. ANSI Z535.5-2022, Safety Tags and Barricade Tapes (for Temporary Hazards), establishes a uniform system for the design, application, and use of safety tags used for temporary hazards, including tags used during lockout/tagout procedures.

It addresses elements such as:

• Signal-word panels that identify the type and severity of the hazard, including DANGER, WARNING, and CAUTION.
• Standard safety colors, including red for DANGER, orange for WARNING, and yellow for CAUTION.
• The format and presentation of safety messages so hazard information can be communicated clearly and consistently.
• The use and format of the safety alert symbol and other graphical elements used to communicate safety information.
  

Should LOTO Tags Have a Specific Color?

Yes, LOTO tags should have a specific color to help ensure that they are easily identifiable as part of a lockout/tagout program. There is no OSHA-mandated color for LOTO tags, but using a consistent, attention-grabbing color is strongly recommended for lockout tagout programs. Most workplaces follow ANSI Z535.1 Standard for Safety Colors, which associates colors with signal-word and hazard classifications. A facility may use those conventions when designing its tags, but they’re not a universal OSHA requirement for every LOTO tag. Whatever system the employer adopts should be consistent, easy for employees to recognize, and supported by training.

As shown above, red is associated with danger, yellow with caution, orange with warnings, and green with safety instructions or emergency equipment. Blue commonly communicates general information or restricted actions, while purple, gray, and black-and-white may be assigned according to a facility’s specific needs. These conventions can help employees recognize a tag’s purpose, but they do not mean that every LOTO tag must be red. OSHA requires a consistent facility system based on color, shape, or size, with standardized print and format for tagout devices.

What Should Be Written on a LOTO Tag?

At minimum, lockout tags must identify the employee who applied it and warn against the hazardous condition if the machine or equipment is energized. OSHA gives legends such as “Do Not Start,” “Do Not Open,” “Do Not Close,” “Do Not Energize,” and “Do Not Operate.”

An employer may also require fields such as department, application date and time, expected completion, reason for the work, equipment ID, or contact information. Those details can improve communication, but they are facility practices unless another applicable requirement or the employer’s own energy-control procedure makes them necessary.

This information helps prevent accidental restarts, especially during shift changes or multi-person maintenance tasks. A few years ago, a colleague told me about an incident involving a maintenance technician working on a conveyor system during a routine shutdown. He was hospitalized after another employee restarted the conveyor that had been tagged but was not labeled properly. OSHA’s investigation concluded that the lack of required information directly contributed to the miscommunication and failure of the lockout tagout process.

This case underscores the importance of clearly written, fully completed LOTO tags—not just tags placed “for appearance.” It also raises a question: how can we reduce the chances of human error even further?

To help answer that, some organizations are starting to explore smart lockout tagout systems, including digital tagging, QR codes, and even augmented reality (AR) overlays. These tools allow workers to view lockout information through a mobile device or headset, and can link to digital permits, schematics, and live maintenance logs.

💡 Expert Insights

“As someone who's been in safety for years, I see this (technology in LOTO) as an opportunity, not a burden. We're not just updating a standard; we're re-imagining how technology and human safety can coexist more intelligently. The future of workplace safety isn't about rigid rules. It's about smart, flexible systems that protect people while enabling technological progress.” – Randal Hines, Senior Consultant

Limitations of Tagout Devices

According to 29 CFR 1910.147(c)(7)(ii), there are specific limitations of tagout devices that employees must be trained to understand:

• • Tagout devices do not provide the same level of protection as lockout (energy-isolating) devices. Tags are essentially warning labels, not physical restraints.

  • Tags are essentially warning devices affixed to energy-isolating devices. They do not prevent the operation of equipment or the release of potentially hazardous stored energy.

  • Tags must not be removed without proper authorization, and they should never be ignored, bypassed, or defeated.

  • Tags must be legible and understandable by all authorized and affected employees.

  • Tags and their attachment means must be securely attached and able to withstand environmental conditions and physical forces (though not necessarily providing full restraint like a lock).

  • Tags evoke a false sense of security if not used with proper procedures and employee awareness.

Unlike physical LOTO locks, tagout devices don’t offer any mechanical restraint. They rely entirely on workers noticing and respecting the tag, which introduces risk. A tag can be ignored, overlooked, or even removed by mistake. A lock, on the other hand, physically prevents operation.

When Can Tagout Be Used Instead of Lockout?

According to OSHA 29 CFR 1910.147(c)(2)(i), tagout devices can be used in place of lockout devices when there is no way to lock out a device, and the employer can demonstrate that tags will ensure full employee protection. This could include removing control fuses, applying additional warning signs, or using control circuit-type devices. In a proper lockout tagout setup, the lockout tag is attached directly to the energy isolating device, typically alongside a padlock or other lockout device. 

A lock provides physical restraint; a tag provides a warning and depends on employees understanding and following the program. That is why OSHA requires lockout for lockable devices unless the employer can demonstrate equivalent protection through tagout and the additional measures above.

Can Lockout Tags Be Reused?

No, lockout tags cannot be reused. OSHA 29 CFR 1910.147(c)(5)(ii)(C)(2) states that "Tagout devices, including their means of attachment, shall be substantial enough to prevent inadvertent or accidental removal. Tagout device attachment means shall be of a non-reusable type, attachable by hand, self-locking, and non-releasable..." Rightly so, because reusing a tag can cause confusion and compromise worker safety, who rely on these safety tags to keep themselves safe from dangerous energy sources.

Other Types of Safety Tags

Keeping your workplace safe starts with understanding the importance of safety tags, and not just lockout tagout tags. Listed below are five different types of safety tags, along with a guide on when to use them and why they're essential.

FAQs on LOTO Tags

What color are LOTO tags?

OSHA does not require one universal color for LOTO tags. Lockout and tagout devices must be standardized within the facility in at least one of color, shape, or size, and tag print and format must also be standardized. A facility may follow ANSI color conventions, but employees must be trained to recognize the system the employer adopts.

Can I print my own LOTO tags?

Yes, you can print your own LOTO tags if the finished devices meet all applicable OSHA requirements. They must be singularly identified, used only for energy control, standardized, durable, substantial, and capable of identifying the employee who applied them. Each tag must also carry an appropriate warning legend and use a compliant attachment method.

Who can remove tagout devices?

A tagout device must be removed by the authorized employee who applied it. If that employee is unavailable, the employer may direct its removal under a specific procedure documented in the energy-control program. Under 29 CFR 1910.147(e)(3), the employer must verify the employee is absent, make reasonable efforts to contact them, and confirm they know about the removal before returning to work.

Are tags safer than locks?

Tags do not provide the physical restraint supplied by a lock. OSHA requires lockout when an energy-isolating device can be locked unless the employer demonstrates that tagout provides equivalent employee protection. That exception requires compliance with the tagout provisions and additional safety measures that reduce the likelihood of unexpected energization.

Do LOTO tags have to include a date and time?

OSHA does not universally require a date or time on every LOTO tag. The tag must identify the employee who applied it and include an appropriate warning legend, such as “Do Not Operate” or “Do Not Energize.” An employer may still require the date, time, department, equipment ID, or reason for the work through its own energy-control procedure.