Layoff Notice Requirements

What notice employers must give before a layoff — federal WARN Act requirements, state laws that go further, and what to do if you're laid off without the notice you're owed.

The federal WARN Act (Worker Adjustment and Retraining Notification Act) requires employers with 100 or more employees to provide 60 calendar days' advance written notice before a mass layoff or plant closing that meets specific thresholds. A 'mass layoff' triggering WARN is generally defined as a layoff affecting at least 500 employees, or 50–499 employees if they represent at least 33% of the workforce, in a 30-day period. A 'plant closing' (closure of a facility) affecting at least 50 employees also triggers the requirement. The notice must be provided to affected workers (or their union), the state dislocated worker unit, and the chief elected official of the local government.

WARN has significant limitations that leave many laid-off workers unprotected. The 100-employee threshold means small and mid-sized employers aren't covered. The thresholds for triggering a 'mass layoff' mean that rolling layoffs below the numerical cutoffs — which have become common as tech companies in particular have executed large reductions in smaller tranches — may not trigger WARN even when the total number affected is substantial. WARN also has exceptions for unforeseeable business circumstances, natural disasters, and faltering companies — exceptions employers sometimes invoke to avoid notice requirements. When WARN is violated, the penalty is back pay and benefits for each day of the violation period, up to 60 days — not a government fine, but a civil claim that must be filed by affected employees.

Many states have 'mini-WARN' laws that expand on the federal baseline: lower employee thresholds (New York's applies to employers with 50 employees), lower layoff-size triggers, longer notice periods (New York requires 90 days), and broader definitions of covered employment actions. California, Illinois, New Jersey, New York, and several other states have enacted expanded protections. If you're laid off and believe WARN or a state mini-WARN law was violated, you can consult an employment attorney — class action lawsuits over WARN violations are common and have resulted in significant recoveries for workers at companies that executed layoffs without proper notice.

Federal WARN Act at a Glance

  • Who must comply: employers with 100+ full-time employees (or 100+ employees who collectively work at least 4,000 hours/week).
  • 60-day notice required: before a covered mass layoff or plant closing, written notice must go to employees, their union (if any), the state dislocated worker unit, and the local government.
  • Mass layoff triggers: 500+ employees laid off in 30 days; OR 50–499 employees if 33%+ of the workforce; at a single employment site.
  • Plant closing trigger: 50+ employees at a single site when the employer closes the facility.
  • Exceptions: unforeseeable business circumstances, natural disasters, and 'faltering companies' may allow shorter notice — but employers must still give as much notice as is practicable and explain why full notice wasn't possible.
  • Penalty for violation: back pay and benefits for each day of violation, up to 60 days. Plus up to $500/day in civil penalties to the local government for each day of violation.

What to Do If You're Laid Off Without Notice

If you're laid off abruptly from a company with 100+ employees and the layoff is large enough to trigger WARN, your first step is to find out whether other employees are being laid off simultaneously and how many total are affected. WARN requires a threshold number, so learning the scope helps you assess whether the law applies. If you believe WARN was violated, consult an employment attorney promptly — there are statutes of limitations on WARN claims, typically three years from the violation. Many employment attorneys take WARN class actions on a contingency basis. Separately, document the circumstances of your termination: date, how the news was communicated, what severance was offered, and whether any explanation was given for why more notice wasn't possible. This documentation supports a claim if you pursue one.

Example

A fintech startup with 120 employees lays off 65 people in one day with no advance notice — citing unforeseeable financial circumstances after a funding round fell through. The 65 affected employees represent 54% of the workforce, which meets the WARN threshold (50+ employees representing 33%+ of the workforce). The company invokes the 'unforeseeable business circumstances' exception but cannot demonstrate they had no advance knowledge. Employees file a class action; the company settles for 45 days of back pay per affected employee — approximately $5.2 million total.