The 50% Hours-Cut Rule: When Reduced Hours Count as a WARN Layoff

Most people picture a WARN notice as a pink slip: a plant closes, or a group of workers is let go on a set date. But the federal WARN Act counts something else as a layoff too — a deep cut to working hours. If an employer slashes hours by more than half for six months, that can be an "employment loss" under the law, even if nobody is fired.

What the WARN Act counts as an employment loss

The WARN Act requires covered employers to give 60 days' written notice before a plant closing or mass layoff. The regulation behind the law, 20 CFR 639.3(f), defines "employment loss" in three ways: an employment termination (other than a discharge for cause, voluntary departure, or retirement); a layoff lasting more than six months; or a reduction in hours of work of more than 50 percent during each month of any six-month period.

That third category is the hours-cut rule. It stops employers dodging notice by keeping workers technically employed on near-zero schedules.

The 50% test, step by step

Three parts of the test must all be met. More than 50 percent: the cut must be greater than half of the employee's hours. A cut of exactly 50 percent does not qualify; a cut from 40 hours a week to 19 hours does. Each month: the reduction must hold during each month of the period. If hours bounce back above halfway in one month, the stretch breaks — so month-by-month records matter. Six months: the period is any six-month stretch, not necessarily a calendar half-year.

What does not count

Not every schedule change triggers the rule. A temporary cut of a few weeks, even a deep one, is not an employment loss under this test unless it stretches past six months. A cut of 50 percent or less never qualifies, no matter how long it lasts — a worker moved from full-time to half-time has lost a great deal of income, but the WARN Act's hours test does not treat that as an employment loss. Voluntary reductions do not count, and reductions caused by a strike, lockout, or natural disaster fall under separate rules, not the ordinary hours test. Workers facing a smaller or shorter cut may still have other protections, but those are separate from WARN notice rights.

How the hours rule interacts with the size thresholds

The hours-cut rule does not stand alone. A WARN notice is only required when the employer and the affected group meet the law's thresholds: generally, an employer with 100 or more full-time employees, and either a plant closing affecting 50 or more workers, or a mass layoff affecting 50 to 499 workers where they make up at least 33 percent of the workforce, or 500 or more workers regardless of percentage.

So a deep hours cut affecting only a handful of workers at a small employer will not trigger a WARN notice, even though the affected workers feel the loss keenly. Conversely, a large employer that cuts hundreds of workers from full-time to a few hours a week for over six months may owe the same 60 days' notice it would owe for outright terminations. The hours test expands what counts as a loss; the thresholds still decide whether notice is owed. Some states add mini-WARN laws with lower thresholds, and the stricter rule generally governs.

What workers should watch for

If your hours have been cut sharply, four steps help. Keep the paper trail: save schedules and pay stubs month by month, since the test turns on monthly hours. Note the start date: the six-month period starts when the reduction begins. Check whether a notice was filed with the state labor agency. Ask about the plan: a stated return within six months points away from a loss; an open-ended cut points toward one. This is not legal advice; workers unsure of their position can contact their state dislocated worker unit.

Reading the registry with the hours rule in mind

WARN records usually describe terminations and closures, because those are the events employers most often report. Hours reductions that qualify as employment losses are harder to spot: a filing may describe a "reduction in force" without spelling out that hours, rather than jobs, were cut. That is one more reason to treat registry totals as reported plans, not confirmed job losses — filings capture what employers reported, and coverage and reporting rules vary by state.

Layoff Atlas data updated October 25, 2026, shows 704 notices covering 66,156 reported workers in the 90-day window, with 33 notices lacking a worker count. Washington (17,073 workers) and California (14,224) lead the state totals, followed by Illinois (4,626), Texas (3,652), and Ohio (3,180). The heaviest upcoming effective week is the week of November 15, with 7,781 workers scheduled. Those figures describe reported plans, not confirmed job losses.

The bottom line

A layoff is not always a door closing. Under the WARN Act, losing more than half your hours for six months can be a layoff in the eyes of the law, with the same 60-day notice requirement as a termination. Knowing the test helps workers recognize when a quiet schedule cut is actually a legal event.

Data source: Layoff Atlas