Stop Work Authority (SWA)

Stop Work Authority (SWA) is a workplace policy that gives every employee and contractor the authority and responsibility to stop a task when they believe it is unsafe, without fear of retaliation. Work stays stopped until the hazard is understood and controlled, and only then resumes with the approval of the person in charge.

SWA is one of the clearest ways an organization shows that safety outranks schedule. It is widely used in oil and gas, construction, utilities and manufacturing, and it works only when workers trust that using it will be supported rather than punished.

What Is Stop Work Authority (SWA)?

Stop Work Authority, sometimes called stop work responsibility or a stop work policy, is a written company commitment. It typically states that anyone on site, regardless of job title, employer or seniority, may stop work they believe poses a risk of injury, illness, environmental harm or serious damage. It also sets out how the stop is communicated, how the issue is resolved and who can authorize a restart.

For most U.S. employers, a formal SWA program is not a specific OSHA requirement. It is a best practice that builds on legal protections that already exist. Federal law protects workers from retaliation for raising safety concerns under Section 11(c) of the OSH Act, and OSHA recognizes a limited right to refuse dangerous work under 29 CFR 1977.12(b)(2), described on OSHA's Workers' Right to Refuse Dangerous Work page.

In one sector SWA is mandatory. The Bureau of Safety and Environmental Enforcement (BSEE) requires offshore oil and gas operators on the Outer Continental Shelf to include SWA in their Safety and Environmental Management Systems under 30 CFR Part 250, Subpart S. Section 250.1930 requires procedures that grant all personnel the responsibility and authority, without fear of reprisal, to stop work or decline a task when an imminent risk exists. It also requires SWA training at orientation, an SWA statement on every job safety analysis and a review of SWA procedures at safety meetings.

Why Stop Work Authority Matters

Serious incidents often follow warning signs that someone noticed but did not act on. A worker sees a frayed sling, a missing guard or a changed condition but assumes someone more senior has already approved it, or worries about delaying the job. SWA removes that hesitation by making it clear that stopping is expected, not just allowed.

• Prevents incidents in real time: it catches hazards at the moment they appear, which no plan or procedure can fully anticipate.
• Empowers the people closest to the risk: frontline workers often see hazards first.
• Covers contractors: a good SWA policy applies equally to employees, contractors and visitors.
• Builds trust: when leaders thank people for stopping work, reporting of hazards and near misses tends to improve.
• Generates learning: each stop is a record of a hazard that existing controls missed.

Stop Work Authority vs. the Right to Refuse Dangerous Work

The two ideas overlap, but they are not the same.

The legal right to refuse dangerous work is narrow. According to OSHA, a refusal is protected only when all of the following conditions are met: where possible, the worker asked the employer to eliminate the danger and the employer failed to do so; the worker genuinely believes an imminent danger exists; a reasonable person would agree there is a real danger of death or serious injury; and there is not enough time to correct the hazard through regular enforcement channels.

Stop Work Authority is a company policy and is usually much broader. It typically lets anyone stop work for any genuine safety concern, not only imminent danger of death or serious injury, and it applies to stopping other people's work, not just refusing your own task. A strong SWA policy means workers rarely need to rely on the legal minimum.

When to Use Stop Work Authority

Policies differ, but common triggers include:

• An unsafe act or unsafe condition that could lead to injury, such as someone working at height without fall protection.
• Conditions that have changed from what the job plan, permit or job hazard analysis assumed, such as weather, a new crew in the area or unexpected equipment behavior.
• Missing, damaged or bypassed safety equipment, such as guards, interlocks or gas detectors.
• Uncertainty about the procedure, the hazards or who is in charge.
• Workers who appear impaired, fatigued or untrained for the task.
• A potential environmental release or serious property damage.

The guiding principle is simple: if you are unsure whether it is safe, stop and ask.

How the Stop Work Process Works Step by Step

1. Stop. Call a clear stop to the affected work using an agreed phrase or signal. If it is safe to do so, place equipment in a safe state.
2. Notify. Inform the people doing the work and the supervisor or person in charge of the area.
3. Discuss. Talk through the concern with everyone involved. The goal is to understand the issue, not to decide who was right.
4. Correct. Agree on and put in place the controls needed, which may mean revising the job hazard analysis or reissuing a permit to work.
5. Resume. Restart only when the person with authority confirms the hazard is controlled and all workers involved agree.
6. Record. Document what happened, the concern raised and how it was resolved.
7. Follow up and recognize. Review significant stops for wider lessons, using root cause analysis where appropriate, and thank the person who stopped the job.

Examples of Stop Work Authority in Action

• A contractor notices a crane's outriggers are set on soft ground after rain and stops the lift until cribbing is added.
• A maintenance technician finds that a valve listed on the lockout procedure is missing a lock and stops work until isolation is verified.
• A new employee is unsure how to operate an unfamiliar machine and stops to ask for training before continuing.
• A driver at a customer site sees a forklift operator loading a trailer that has not been chocked or restrained and stops loading until it is secured.

Barriers and Best Practices for SWA

Common Barriers to Using SWA

Many organizations have an SWA policy on paper that is rarely used. Typical reasons include:

• Fear of consequences: workers worry about blame, lost bonuses or being seen as slowing the job.
• Production pressure: tight schedules send a message that stopping is costly.
• Hierarchy: junior workers and contractors may hesitate to stop a senior employee or a client's crew.
• Mixed signals: leaders praise SWA in meetings but question people after a stop.
• Unclear process: people are not sure how to call a stop or who decides when to restart.

Best Practices for an Effective SWA Program

• Put the policy in writing, have senior leaders sign it and include it in contractor agreements.
• Cover SWA in orientation for every employee, contractor and visitor, and practice it in drills or scenarios.
• Make the response to every stop positive, even when the concern turns out to be unfounded.
• Never discipline anyone for a good-faith stop.
• Track stops as a leading indicator and share lessons learned across sites.
• Remind crews of SWA during pre-job briefings and toolbox talks.

How SMS360 Helps

The SMS360 Safety Observations module gives workers a simple way to record stop work events and the unsafe conditions or behaviors behind them, including from a mobile device in the field. Supervisors can assign follow-up actions with owners and due dates, track them to closure and keep a record of how each concern was resolved. Dashboards and reports help safety teams spot trends across crews and sites.

Frequently Asked Questions

Is Stop Work Authority required by OSHA?

No federal OSHA standard requires general industry or construction employers to have a formal Stop Work Authority program. OSHA does protect workers from retaliation for raising safety concerns and recognizes a limited right to refuse dangerous work. Offshore oil and gas operators are an exception: BSEE requires SWA as part of their SEMS programs under 30 CFR 250.1930.

Can you be fired for using Stop Work Authority?

Under a well-written SWA policy, no one should face discipline for a good-faith stop, even if the concern proves unfounded. Separately, Section 11(c) of the OSH Act prohibits retaliation against workers for exercising safety rights, such as reporting hazards. Workers who believe they faced retaliation can file a complaint with OSHA, generally within 30 days.

Who can restart work after a stop?

The SWA policy should name the role responsible for authorizing a restart, usually the supervisor or person in charge of the work. Before restarting, the hazard should be corrected and everyone involved should agree it is safe to proceed. Under BSEE's SEMS rule, offshore work resumes when the individual with ultimate work authority determines the risk has been resolved.

Does Stop Work Authority apply to contractors?

It should. Contractors often perform high-risk tasks, and an effective policy gives them the same authority to stop work as employees, including the authority to stop work by the host employer's crews. Include SWA expectations in contractor agreements, site orientation and pre-job briefings so everyone on site understands the process.