---
type: threshold
id: warn
asset: regulatory-threshold-triggers
title: "WARN — US federal employment law thresholds by employee count"
sources:
  - https://stratus.hr/resources/federal-law-breakdown-how-many-employees
source_quote: "Worker Adjustment and Retraining Notification (WARN) Act Per the <https://www.dol.gov/general/topic/termination/plantclosings> Worker Adjustment and Retraining Notification (WARN) Act , if your plant closes or you have a mass layoff, you are required to provide a 60-day advance written notice to affected employees."
generated: true
verified: false
harvested: 2026-08-04
stale_after: 2027-08-04
law: "WARN"
full_name: "Worker Adjustment and Retraining Notification (WARN) Act"
employee_threshold: "100"
requirement: "you are required to provide a 60-day advance written notice to affected employees"
counting_note: "part-time and temporary employees are included in the head-count calculation"
---
**Law:** WARN

**Full name:** Worker Adjustment and Retraining Notification (WARN) Act

**Employee threshold:** 100

**Requirement:** you are required to provide a 60-day advance written notice to affected employees

**Counting note:** part-time and temporary employees are included in the head-count calculation

> Worker Adjustment and Retraining Notification (WARN) Act Per the <https://www.dol.gov/general/topic/termination/plantclosings> Worker Adjustment and Retraining Notification (WARN) Act , if your plant closes or you have a mass layoff, you are required to provide a 60-day advance written notice to affected employees.

Source: <https://stratus.hr/resources/federal-law-breakdown-how-many-employees>