What are WARN Act layoff notices?

The Worker Adjustment and Retraining Notification (WARN) Act is a federal law requiring employers with 100 or more full-time workers to provide 60 calendar days advance written notice before conducting mass layoffs (affecting 50 or more workers at a single site) or plant closings. Many states have "mini-WARN" laws with stricter requirements, such as lower employee thresholds, longer notice periods, or broader definitions of covered events.

WARN filings serve as a forward-looking labor market indicator because the 60-day notice requirement means that planned layoffs are publicly disclosed weeks or months before they show up in unemployment claims or payrolls data. Analysts who track WARN notices across states can identify emerging layoff waves before traditional labor statistics reflect them. This is particularly valuable at turning points in the business cycle when the labor market is transitioning from expansion to contraction.

The data has practical limitations. WARN notices are filed at the state level and there is no centralized federal database with real-time aggregation. Coverage is incomplete because the 100-employee threshold exempts small businesses, and some qualifying events slip through without proper filing. Additionally, not all WARN notices result in actual layoffs; companies sometimes file notices as a precaution and then rescind them if conditions improve. Despite these limitations, sustained increases in WARN filings have historically preceded rises in initial jobless claims by 4-8 weeks.

During the 2023-2024 tech layoff cycle, WARN filings surged in California and other tech-heavy states, providing early signals of the retrenchment at major technology companies. The filings correctly predicted the subsequent uptick in tech-sector unemployment claims. For macro analysts, monitoring WARN filings adds a leading edge to the labor market dashboard that complements the coincident (payrolls) and slightly lagging (unemployment rate) official data.