WARN Act Requirements in Pennsylvania: Advance Layoff Notice Rules

The Worker Adjustment and Retraining Notification Act (WARN Act), codified at 29 U.S.C. § 2101 et seq., is the primary federal law governing mass layoff and plant closure notice. The WARN Act applies to private employers with 100 or more full-time employees (not counting part-time workers). The law prohibits covered employers from implementing a plant closing or mass layoff without providing at least 60 days' written notice to affected workers, labor unions representing workers, the state dislocated worker unit, and the local chief elected official.

A plant closing occurs when an employer closes a single site permanently, eliminating 50 or more workers. A mass layoff requires notice when 500 or more workers lose their jobs (or 50 or more workers if they represent at least 33% of the employer's workforce at that site). The Department of Labor (DOL) enforces the WARN Act. Employers must provide written notice that specifies the effective date of the action, whether the closing is temporary or permanent, and the worker's last day of work.

Violations of the WARN Act are serious. Under 29 U.S.C. § 2103, affected employees can recover back pay for the period between the violation date and either 60 days after notice was due or when the closing/layoff occurred, whichever is later. Workers can also recover the cost of continuation health insurance premiums for the same period. The statute allows collective actions and awards attorney fees and costs to prevailing plaintiffs. No state or local exemptions reduce this federal mandate.

Pennsylvania has not enacted a state-specific WARN Act or mass layoff notice statute. Therefore, the federal Worker Adjustment and Retraining Notification Act, 29 U.S.C. § 2101 et seq., is the only law requiring advance notice of layoffs and plant closings in Pennsylvania.

Because Pennsylvania lacks its own WARN Act, the state does not strengthen or weaken federal protections—it defers entirely to federal law. This means Pennsylvania employers are subject to the same 60-day notice requirement and the same 100-employee threshold as employers in all other states. There are no Pennsylvania-specific exemptions, shorter notice periods, or lower employee count thresholds.

Federal WARN Act coverage applies uniformly in Pennsylvania to employers with 100 or more full-time employees on the payroll for each of 20 or more calendar weeks during the preceding 12 months. The notice must be provided in writing to each worker individually and must also be given to any labor union representing those workers, the Pennsylvania Department of Labor and Industry (as the state dislocated worker unit), and the chief elected official of the local jurisdiction where the site is located.

Pennsylvania does offer complementary protections through its UI system and worker retraining programs, but these are not layoff notice laws—they address benefits after separation occurs. Remedies for WARN Act violations in Pennsylvania are exclusively federal: back pay, health insurance continuation costs, and attorney fees recovered through federal court or EEOC administrative processes. An employee in Pennsylvania cannot sue under state law for violation of a state WARN Act because one does not exist.

The WARN Act contains several important exceptions and limitations. First, the law applies only to employers with 100 or more employees; small businesses with fewer than 100 full-time employees are exempt. Part-time workers (those working fewer than 20 hours per week) are not counted toward the 100-employee threshold, though they may be entitled to notice if they are affected by a mass layoff.

Second, temporary layoffs lasting less than six months are exempt from WARN Act notice requirements. If an employer reasonably expects to recall workers within six months, no 60-day notice is required—however, once the six-month period is exceeded, the layoff becomes permanent and retroactive notice obligations may apply.

Third, employers facing unforeseeable circumstances (sometimes called the "unforeseeable business circumstances" exception) may provide less than 60 days' notice if the closure or mass layoff resulted from a sudden, dramatic, and unexpected event beyond the employer's reasonable control. This exception is narrowly construed and rarely succeeds as a complete defense; courts typically allow reduced notice periods rather than eliminating notice obligations entirely. Examples include natural disasters, sudden loss of a major customer, or unexpected financial collapse.

Fourth, the WARN Act exempts strikes and lockouts from triggering notice requirements, though the legal treatment of notice during labor disputes is complex. Fifth, employees hired after notice is given are not entitled to the full 60-day notice but must still receive written notice as soon as practicable. Finally, certain temporary employees and workers in temporary staffing arrangements may have limited or no WARN Act protection depending on the employer-employee relationship and whether the assignment was genuinely temporary when created.

Step 1: Document all communications and timeline. Keep copies of any notice you received (or failed to receive) stating when layoffs would occur. Write down the date you learned of the planned closing or mass layoff, how many coworkers were affected, and when your last day of work was. Save emails, memos, or postings from the employer about the action. Record the names and contact information of coworkers affected and any union representatives. Take screenshots of company announcements or intranet notices. This documentation establishes when the employer knew about the layoff and whether proper notice was given.

Step 2: Check whether your employer is WARN Act-covered. Determine whether your employer had 100 or more full-time employees during the 12 months before the closing or mass layoff occurred. Count only employees working 20 or more hours per week. If the employer had fewer than 100 employees, the WARN Act does not apply. If your employer is covered and 50 or more workers at your site lost jobs (or 50+ representing 33% of the workforce), WARN Act notice was required. Ask coworkers to help verify the employee count if possible.

Step 3: File a charge with the U.S. Department of Labor. Contact the Wage and Hour Division of the DOL, which enforces the WARN Act in Pennsylvania. You can file a complaint online at www.dol.gov/agencies/whd or by mail to the Philadelphia Wage and Hour Division office at 170 S. Independence Mall West, Suite 800E, Philadelphia, PA 19106. You must file within two years of the violation (or three years if the violation was willful). Provide your name, contact information, the employer's name and address, the date the layoff or closing occurred, the date you learned about it, your last day of work, and the number of workers affected. Attach your documentation.

Step 4: Expect the DOL investigation process. After you file, the Wage and Hour Division will contact your employer for information. The agency typically investigates within 30 to 90 days, though complex cases take longer. The DOL will request records of employee rosters, communications about the layoff, notification dates, and any notices provided to unions or local officials. You may be contacted for a statement or interview. The DOL determines whether the employer violated the WARN Act and calculates back pay owed. If a violation is found, the DOL refers the case to the Department of Justice for settlement negotiation or litigation.

Step 5: Consult an employment attorney if DOL action is slow or if you want to pursue a private lawsuit. You have the right to file a civil lawsuit against your employer under 29 U.S.C. § 2104 without waiting for DOL action. Contact a lawyer specializing in employment law or WARN Act violations (search your state bar association's lawyer referral service). An attorney can demand payment of back pay (up to 60 days of wages), continuation of health insurance costs, and attorney fees from your employer. Many employment lawyers work on contingency for WARN Act cases because the remedies are clearly defined. Private lawsuits can be filed in federal district court in Pennsylvania's Western or Eastern District, or in Pennsylvania state court. The statute of limitations is two years for unintentional violations or three years for willful violations.