How to File an OSHA Complaint: A Step-by-Step Guide

Why Filing a Complaint Matters More Than You Think

OSHA cannot inspect every workplace in America. With approximately 2,100 federal inspectors covering 8 million worksites, the agency relies heavily on worker complaints to identify the most dangerous conditions. According to OSHA data, complaint-driven inspections make up a significant share of all inspections conducted each year.

Many workers hesitate because they assume OSHA already knows about the hazard, or they fear retaliation. The data tells a different story: employers with repeat violations (which you can look up on our employer search) often continue operating unsafe conditions until a complaint triggers a new inspection.

This guide walks through the exact process, from gathering information to filing the complaint to understanding what OSHA does with it.

Before You File: What You Need

You do not need a lawyer or any special documentation to file an OSHA complaint. However, the more specific your complaint, the more likely it is to trigger a full on-site inspection rather than a letter inquiry.

What to gather before filing:

• Employer name and physical address of the worksite (not corporate HQ, but the specific location where the hazard exists)
• Description of the hazard - be as specific as possible: what is the danger, where exactly is it, what equipment or chemicals are involved
• Number of workers exposed - even an estimate helps OSHA prioritize
• Duration - how long has this condition existed? Has it been reported to the employer?
• Photos or documentation - not required, but they strengthen your case significantly

What you do NOT need: You do not need to know which specific OSHA standard is being violated. That is the inspector's job. Describe the hazard in plain language.

Three Ways to File an OSHA Complaint

OSHA accepts complaints through three channels. The online form is the most common and creates a documented record automatically.

Option 1, Online (recommended). Visit osha.gov/workers/file-complaint and complete the electronic form. You will receive a confirmation and can request anonymity. This is the fastest way to create a formal record.

Option 2, By phone. Call your local OSHA Area Office or the national hotline at 1-800-321-OSHA (1-800-321-6742). Phone complaints are effective for urgent situations and allow you to provide verbal detail about the hazard.

Option 3, In writing or in person. You can mail a written complaint or visit your local OSHA office. Written complaints signed by a current employee or their representative are more likely to result in an on-site inspection (as opposed to a phone/fax inquiry).

What Happens After You File

OSHA evaluates every complaint and categorizes it by severity. The response depends on the nature of the hazard:

Imminent danger: If OSHA believes workers face immediate risk of death or serious physical harm, an inspector can be dispatched within 24 hours.

Serious hazard (on-site inspection): For complaints alleging serious violations, especially those signed by a worker, OSHA typically conducts an on-site inspection. The compliance officer examines the workplace, interviews employees privately, reviews injury logs, and checks equipment. You can look up the results on our city pages once the inspection data is published.

Non-formal inquiry: For less severe allegations or unsigned complaints, OSHA may send the employer a letter describing the hazard and requiring a written response within 5 business days. The complainant receives a copy of the employer's response and can request a full inspection if unsatisfied.

Your Legal Protections: Whistleblower Rights

Section 11(c) of the Occupational Safety and Health Act makes it illegal for employers to retaliate against workers who report safety concerns. Retaliation includes firing, demotion, transfer, reduced hours, intimidation, or any adverse action taken because you exercised your safety rights.

If you face retaliation: You have 30 days from the retaliatory action to file a whistleblower complaint with OSHA. This is a strict deadline. OSHA investigates the complaint and can order reinstatement, back pay, and restoration of benefits.

For a deeper overview of all worker protections, see our guide on Your Rights Under OSHA.

What This Means for You: A Practical Framework

If you believe your workplace has a safety hazard, work through these steps:

Step 1, Document the hazard. Write down what you observed, where it is, when you saw it, and how many workers are affected. Take photos if you can do so safely.

Step 2, Check the employer's history. Search our employer database to see if this employer has prior OSHA inspections, violations, or WHD cases. A pattern of violations strengthens your complaint.

Step 3, File the complaint. Use the online form at osha.gov. Request anonymity if you are concerned about identification. Be specific: location, hazard description, number of workers exposed.

Step 4, Follow up. OSHA will contact you with the outcome. If the response was a phone/fax inquiry and you believe the hazard persists, you can request a full on-site inspection.

Frequently Asked Questions