Massachusetts WARN Act: Coverage, Notice, and Penalties

The Massachusetts WARN Act framework is really two laws working together: the federal Worker Adjustment and Retraining Notification Act and the state plant closing statute at M.G.L. c. 151A, §§ 71A–71G. If you run a Massachusetts business with 50 or more employees and you are planning a mass layoff or facility shutdown, you generally owe 60 days of written notice to affected workers, MassHire Rapid Response, and local government officials before the first separation. Miss that deadline and you can be liable to each affected employee for back pay and benefits for up to 60 days.¹

The federal law and the Massachusetts law overlap but do not match. Federal WARN starts at 100 employees. The state threshold is 50. That gap is the single most important thing for mid-size Massachusetts employers to understand: you can sit safely below the federal trigger and still owe a full state WARN filing.

Who Is Covered and What Triggers Notice

Federal WARN reaches any business that employs 100 or more full-time workers, or 100 or more employees who together work at least 4,000 hours per week (excluding overtime).² If you hit either count, you must give 60 calendar days of written notice before a plant closing or mass layoff.³

Under federal law, a plant closing is the permanent or temporary shutdown of a single site of employment, or of one or more operating units within a site, that costs 50 or more full-time employees their jobs during any 30-day period.³ A mass layoff is a workforce reduction that is not a closing but that, within any 30-day period at a single site, eliminates jobs for at least 50 employees making up at least 33 percent of the workforce, or 500 or more employees regardless of percentage.⁴

The Massachusetts statute defines its own terms. A “facility” is any plant, factory, commercial business, hospital, institution, or other Massachusetts workplace that employed 50 or more people during any month in the six months before the commissioner’s certification. A “plant closing” under state law is a permanent cessation or reduction of business that permanently separates at least 90 percent of a facility’s employees within a six-month period, and a “partial closing” is a permanent shutdown of a major portion of the business that terminates a significant number of employees.⁵

State guidance builds a 60-day notice duty on top of that structure: Massachusetts employers with 50 or more employees must submit a WARN notice at least 60 days before a layoff or closing and notify MassHire Rapid Response, local government officials, and the employees themselves.⁶

Who Counts in Your Headcount

Federal law defines a part-time employee as someone who averages fewer than 20 hours per week or who has worked fewer than 6 of the 12 months preceding the notice date.² The 90 days immediately before the notice date (or the actual employment period, if shorter) is the window for computing the hours average.⁷ Part-time workers do not count toward the 100-employee coverage threshold under federal WARN. But once you cross that threshold with your full-time count, part-timers who lose their jobs are affected employees and are entitled to notice.

State law uses a straight 50-employee count during any month in the prior six months.⁵

Remote workers complicate the “single site of employment” analysis. For traveling or outstationed employees, the site they are assigned to as a home base, from which their work is assigned, or to which they report is their single site.⁷ The regulations do not squarely address fully remote employees, and the outstationed-worker rule is the closest analog. If your remote Massachusetts workers are all managed from or report to one Massachusetts office, do not assume they fall outside WARN just because they never come in.

Filing a WARN Notice in Massachusetts

Massachusetts employers send WARN letters to MassHire Rapid Response by email at warnnotice@mass.gov, at least 60 days before the first separation.⁶ Notice to local government normally goes to the mayor, city manager, or town administrator of the municipality where the affected site is located.

The content of the notice varies by recipient. For union-represented employees, notice goes to the chief elected official of each union and must state the site’s name and address, a company contact and phone number, whether the action is permanent or temporary, the expected date of the first separation, the separation schedule, and the job titles and names of workers in affected positions. Non-represented employees receive their own written notice in plain language covering whether the action is permanent or temporary, the expected dates of the closing and their own separation, whether bumping rights exist, and a company contact.⁸

The government notice covers the site name and address, a company contact, permanent or temporary status, expected date and schedule of separations, affected job titles with headcounts, whether bumping rights exist, and the names and addresses of any union officials.⁸

In mixed workforces, notice to a union covers only that union’s members. Non-represented workers still need individual written notice, and sending the union letter alone is not enough.⁹

Exceptions That Shorten the 60 Days

Three federal exceptions let an employer give less than 60 days of notice, but none of them eliminate the duty to notify. You must still give as much notice as practicable and explain in the notice why the full period was not possible.

Faltering company. Available only for plant closings, not mass layoffs. The employer must have been actively seeking capital or business, must have reasonably and in good faith believed that giving notice would have blocked that capital or business, and the funding sought must have been enough to postpone or avoid the shutdown for a reasonable period.¹⁰
Unforeseeable business circumstances. Applies to closings and layoffs caused by conditions not reasonably foreseeable when 60-day notice would have been due, such as a sudden major contract cancellation or a strike at a key supplier.¹¹
Natural disaster. No notice is required if the closing or layoff results directly from a flood, earthquake, or similar natural disaster.¹²

The employer carries the burden of proving any exception. A soft quarter or declining sales will not satisfy the unforeseeable-circumstances standard on its own.

Traps That Catch Employers

The 90-Day Aggregation Rule

Federal law blocks the strategy (deliberate or accidental) of splitting layoffs into rounds that individually stay under the thresholds. If separate employment losses within any 90-day window collectively hit the WARN numbers, every round needs notice, unless the employer proves each was caused by separate and distinct events.¹³

Thirty layoffs in January and 25 more in March look like two events. If both flowed from the same business downturn, they count as one for WARN purposes, and the violation dates back to the first round.

Temporary Layoffs That Run Long

A layoff first expected to last six months or less can turn into a WARN violation retroactively. Once it extends beyond six months, it becomes an employment loss dating back to when the layoff began. Retroactive liability is avoided only if the extension was caused by circumstances not reasonably foreseeable at the start of the layoff and notice was given as soon as the extension became foreseeable.¹⁴ Federal district courts decide foreseeability case by case, and the employer carries the burden.

Sale of a Business

WARN obligations survive a sale. The seller handles notice for any terminations occurring up to and including the closing date. After closing, the buyer is on the hook for later layoffs, because the statute treats the seller’s employees as the buyer’s employees immediately after the effective date of the sale.² Purchase agreements often allocate the notice duty between the parties, but private contracting does not shift statutory liability if notice is missed.

Penalties for Missed Notice

An employer that orders a closing or mass layoff without proper notice is liable to each affected employee for back pay at the employee’s regular rate, plus the cost of benefits (including medical expenses) that would have been covered during the period. Liability runs for the length of the violation, up to 60 days maximum. For employees who worked less than 120 days, the ceiling is half the number of days they were employed.¹

Back pay is calculated using the higher of the employee’s average regular rate over the last three years or the employee’s final regular rate. Wages paid during the violation period, voluntary unconditional payments, and benefit payments made on the employee’s behalf offset the liability.¹

Failing to notify local government carries a separate civil penalty of up to $500 per day of violation. That penalty is waived if the employer pays each affected employee in full within three weeks of ordering the shutdown or layoff. Courts also have discretion to reduce liability if the employer proves the violation was in good faith and based on reasonable grounds for believing no violation had occurred.¹

How Enforcement Actually Works

The federal Department of Labor does not investigate WARN complaints or file WARN lawsuits.¹⁵ Enforcement runs entirely through private suits by affected employees or their unions in federal district court. Workers who suspect they did not get proper notice need to move quickly and consult an attorney rather than waiting for an agency to act.

Under the state statute, the commissioner certifies whether a plant closing has occurred and can notify the employer, any union, and other interested parties of that determination. Interested parties who disagree with the certification can request a hearing within ten days.¹⁶

After You File: Rapid Response and State Benefits

Once MassHire receives your WARN notice, its Rapid Response team contacts you to arrange on-site services for affected workers: unemployment insurance orientations, resume and job-search workshops, and connections to retraining through local MassHire Career Centers. Certification of a plant closing under state law also triggers access to two state-funded programs administered by the commissioner: the Reemployment Assistance Fund and the Health Insurance Benefits Fund, which provide reemployment benefits and help cover health coverage lost because of the closing.¹⁷

Cooperating with Rapid Response, giving state staff access to the worksite, and releasing employees to attend workshops during work hours makes the transition cleaner for workers and reduces the risk of litigation from employees who feel blindsided by the shutdown.

1
Office of the Law Revision Counsel. 29 USC 2104 – Administration and Enforcement of Requirements
2
Office of the Law Revision Counsel. 29 USC 2101 – Definitions
3
Office of the Law Revision Counsel. 29 USC Chapter 23 – Worker Adjustment and Retraining Notification
4
U.S. Department of Labor. Employment Law Guide – Notices for Plant Closings and Mass Layoffs
5
General Court of Massachusetts. Massachusetts Code Chapter 151A Section 71A – Definitions Applicable to Sections 71B to 71G
6
Mass.gov. File a WARN Letter in Massachusetts
7
eCFR. 20 CFR 639.3 – Definitions
8
eCFR. 20 CFR 639.7 – What Must the Notice Contain
9
U.S. Department of Labor. WARN Advisor
10
U.S. Department of Labor. WARN Advisor – Faltering Company
11
eCFR. 20 CFR 639.9 – When May Notice Be Given Less Than 60 Days in Advance
12
Office of the Law Revision Counsel. 29 USC 2102 – Notice Required Before Plant Closings and Mass Layoffs
13
U.S. Department of Labor. WARN Advisor – Aggregation
14
U.S. Department of Labor. Worker Adjustment and Retraining Notification Act Frequently Asked Questions
15
U.S. Department of Labor. WARN Advisor
16
General Court of Massachusetts. Massachusetts Code Chapter 151A Section 71B
17
General Court of Massachusetts. Massachusetts Code Chapter 151A Section 71E