Arizona

Arizona WARN Act: No State Law, But Federal WARN Still Applies

Arizona has no state WARN Act. Federal WARN governs Arizona employers, requiring 60 days advance written notice before a covered plant closing or mass layoff. Arizona employers with operations in neighboring California face a different compliance picture under Cal-WARN.

ArizonaFederal WARNNo State Law

None

State WARN law

60 days

Federal notice required

100+

Employees to trigger

OverviewFederal WARN in ArizonaThresholds and triggersDoes WARN apply?Notice recipientsExceptionsPenaltiesIndustry notesArizona vs. Cal-WARNFAQ

Overview: Arizona and WARN Act obligations

Arizona has no state plant closing or mass layoff notification law. Federal WARN (the Worker Adjustment and Retraining Notification Act, 29 U.S.C. 2101 et seq.) is the governing statute for Arizona employers. Neighboring states New Mexico, Utah, Nevada, and Colorado also have no state WARN law.

California, which shares Arizona's western border, has the most demanding state WARN law in the country. Cal-WARN applies to employers with 75 or more employees, includes part-time workers in the threshold count, and has no financial distress exception. Arizona employers with California operations face a different compliance picture entirely for those sites.

Regional context

Arizona borders California, which has the most demanding state WARN law in the country. Cal-WARN applies to employers with 75 or more employees — lower than federal WARN — includes part-time workers, and has no financial distress exception. Arizona employers with California operations face a different compliance picture entirely.

Federal WARN in Arizona

Because Arizona has no state WARN law, federal WARN applies in full. Federal WARN requires employers with 100 or more full-time employees to give 60 days advance written notice before a plant closing affecting 50 or more full-time employees, or before a mass layoff meeting the statutory thresholds.

The state rapid response agency for Arizona is the Arizona Department of Economic Security (DES), Rapid Response program. Federal WARN notice must go to the Arizona DES Rapid Response program as the state dislocated worker unit, in addition to the required employee and local government notices.

Three required notice recipients in Arizona

  • Employees or union representative

    Each full-time employee who will experience an employment loss. If the employee is represented by a union, notice goes to the chief elected officer of the union local.

  • Arizona DES Rapid Response

    The Arizona Department of Economic Security Rapid Response program, acting as the state dislocated worker unit under federal WARN. Submit through the DES Rapid Response program so reemployment services can be coordinated for affected workers.

  • Chief elected official of local government

    The mayor, county executive, or equivalent of the unit of local government where the layoff or closing will occur.

Thresholds and triggers

Federal WARN uses different thresholds for plant closings and mass layoffs. Both require 60 days notice. The employer coverage threshold is determined by full-time employee count across all sites nationwide.

Employer coverage threshold

Federal WARN applies to employers with 100 or more full-time employees. Count employees company-wide, not just in Arizona.

Count toward 100

  • Full-time employees (20+ hours/week)
  • Employees on paid leave
  • Employees on temporary layoff with recall rights

Do not count

  • Part-time employees (under 20 hours/week)
  • Employees with fewer than 6 months tenure
  • Independent contractors

Plant closing trigger

A plant closing is a permanent or temporary shutdown of a single site of employment, if the shutdown results in employment loss for:

50 or more full-time employees at the affected site

Mass layoff trigger

A mass layoff (not a plant closing) requires notice if either threshold is met at a single site of employment:

Option A

50+ employees

who represent at least 33% of the full-time workforce at the site

Option B

500+ employees

regardless of what percentage of the workforce they represent

Remote workers and Arizona's growing distributed workforce

Phoenix's growing remote workforce — in financial services, technology, and customer operations — raises WARN threshold questions. Remote workers count at their assigned reporting site. Workers with no fixed reporting site may aggregate at the employer's principal place of business. Arizona has become a major destination for companies relocating from California; those employers retain their California WARN obligations for their remaining California employees.

90-day aggregation rule

Federal WARN aggregates employment losses within a 90-day rolling window. Layoffs that each fall below the threshold individually are combined and treated as a single event if they occur within 90 days of each other, unless the employer can demonstrate that the separate actions were due to separate, unrelated causes.

Does federal WARN apply to your layoff?

Work through these five questions in order. If you answer yes to each, WARN notice is required. Not sure of your headcount? Use the WARN Act calculator.

1

Do you have 100 or more full-time employees?

Count all full-time employees nationwide, not just in Arizona. Part-time employees (fewer than 20 hours per week or fewer than 6 months in the last 12 months) do not count toward the 100-employee threshold.

Yes: Continue to step 2
No: Federal WARN does not apply.
2

Is the action occurring at a single site of employment?

WARN analyzes each site separately. A multi-site reduction must be evaluated site by site. Counts aggregate within a site over a 90-day rolling window.

Yes: Continue to step 3
No: Evaluate each site separately.
3

Is the action a plant closing or mass layoff?

A plant closing is a permanent or temporary shutdown causing employment loss for 50 or more full-time employees. A mass layoff is a reduction in force that does not constitute a plant closing.

Yes: Continue to step 4
No: WARN does not apply to this action.
4

Does the layoff meet the headcount threshold?

Plant closing: 50 or more full-time employees affected. Mass layoff: 500 or more full-time employees, OR 50 or more full-time employees who represent at least 33% of the full-time workforce at the site.

Yes: Continue to step 5
No: WARN does not apply unless a separate threshold is met.
5

Does an exception apply?

Three exceptions exist: faltering company (plant closings only), unforeseeable business circumstances, and natural disaster. If one applies, reduced notice may be permissible, but you must give as much notice as practicable and state the reason in writing.

Yes: Reduced notice may be permissible. See the Exceptions section.
No: Full 60-day notice is required.

Notice recipients

Federal WARN requires written notice to three recipients. All three must receive notice simultaneously — providing notice to employees without notifying the state agency and local government is a violation.

1

Employees

Each affected full-time employee, or the chief elected officer of their union local if represented.

2

Arizona DES Rapid Response

The Arizona Department of Economic Security Rapid Response program, acting as the state dislocated worker unit.

3

Chief elected official

The mayor, county executive, or equivalent for the local government jurisdiction where the layoff will occur.

Exceptions to the 60-day requirement

Federal WARN provides three exceptions that permit reduced notice. None eliminates the notice obligation entirely. The employer must still give as much advance notice as practicable and state the reason for reduced notice in writing.

Faltering company

Plant closings only

The employer was actively seeking capital or business at the time 60-day notice would have been required, and reasonably believed in good faith that giving notice would have precluded obtaining that capital or business.

Limits

  • Applies only to plant closings, not mass layoffs.
  • The employer must have been actively seeking capital, not merely hoping for it.
  • The notice must explain that the faltering company exception is being invoked.

Unforeseeable business circumstances

Plant closings and mass layoffs

The closing or layoff was caused by business circumstances that were not reasonably foreseeable at the time 60-day notice would have been required, such as a sudden, dramatic, and unexpected action by a major customer.

Limits

  • The circumstances must be sudden and unexpected, not a worsening trend the employer was aware of.
  • Loss of a major customer is a classic example; a predictable revenue decline is not.
  • Notice must be given as soon as practicable and must describe the circumstances.

Natural disaster

Plant closings and mass layoffs

The closing or layoff was a direct result of a natural disaster: flood, earthquake, drought, storm, tidal wave, or similar natural disaster.

Limits

  • The layoff must be a direct result of the disaster, not downstream economic effects.
  • Even with this exception, the employer must provide notice as soon as practicable.

Even with an exception, document your reasoning

Even with an exception, give as much advance notice as practicable and state the reason in writing. Courts scrutinize exception claims closely. A blanket assertion that business circumstances were unforeseeable, without supporting documentation, rarely survives WARN litigation.

Penalties for violation

Federal WARN violations expose employers to back pay and benefits liability for each affected employee, up to 60 days, plus a civil penalty for failure to notify the local government.

Per-employee liability

Back pay at the employee's regular rate, plus the value of benefits (including medical expenses that would have been covered), for each day of the violation, up to 60 days total per employee.

Civil penalty

Up to $500 per day for failure to notify the chief elected official of the local government. This penalty can be offset if the employer makes voluntary payments to affected employees during the violation period.

Arizona WARN claims: Ninth Circuit jurisdiction

Arizona WARN claims are filed in U.S. District Court in the Ninth Circuit. The Ninth Circuit also hears California WARN Act claims — courts in this circuit are experienced with WARN litigation and have developed significant case law through Cal-WARN disputes.

Industry notes for Arizona employers

Semiconductor and technology (Phoenix metro)

Phoenix is one of the largest semiconductor manufacturing hubs in the United States, with major facilities operated by Intel, TSMC, and Microchip Technology. Fab closures or production shifts affecting 50 or more workers at a single Arizona site trigger federal WARN. The semiconductor industry's large single-site workforces make WARN a common compliance consideration.

Financial services and call centers

Arizona hosts back-office and customer operations for major financial institutions and insurance companies. Large call center or operations center closures — common in corporate restructurings — frequently cross WARN thresholds. Employers should evaluate site headcount carefully before announcing any restructuring.

Retail and distribution

Phoenix and Tucson are major retail and logistics hubs. Distribution center closures or mass store closures affecting 50 or more employees at a single location trigger the plant closing prong of WARN. Multi-location retail closures require site-by-site analysis.

Healthcare

Banner Health and other large Arizona health systems are among the state's largest employers. Facility closures or service-line eliminations affecting 50 or more employees at a single campus trigger WARN. Healthcare employers should also evaluate whether temporary layoffs that extend beyond 6 months convert to a plant closing under the statute.

Arizona vs. California (Cal-WARN)

California's WARN law (Cal-WARN) is triggered at 75 employees — 25 fewer than federal WARN — includes part-time workers in the threshold count, and offers no financial distress exception. Arizona employers with California operations should treat Cal-WARN as the governing standard for those sites.

Requirement

Arizona (Federal)

California (Cal-WARN)

  • Employer threshold

    100 full-time

    75 full-time

  • Plant closing trigger

    50 employees

    50 employees

  • Mass layoff trigger

    500 or 50+33%

    50 employees (no % trigger)

  • Notice period

    60 days

    60 days

  • Part-time workers in threshold

    Excluded

    Included

  • Financial distress exception

    Available

    Not available

  • Aggregation period

    90-day rolling window

    90-day rolling window

  • State agency

    AZ Dept of Economic Security

    CA Employment Development Dept

California-specific differences that are stricter than federal WARN are highlighted in green. Arizona employers who have relocated from California or maintain California operations should review their Cal-WARN obligations for those sites separately.

Related resources

Free download

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66 steps across 9 phases, including WARN Act notice requirements, adverse impact analysis, and documentation. Formatted as an Excel workbook your team can track in real time.

Frequently asked questions

Does Arizona have its own WARN Act?

No. Arizona has not enacted a state plant closing or mass layoff notification law. Federal WARN governs Arizona employers. Neighboring states New Mexico, Utah, Nevada, and Colorado also have no state WARN law. California, which shares Arizona's western border, has the most demanding state WARN law in the country.

Which agency receives WARN notices in Arizona?

The Arizona Department of Economic Security (DES) Rapid Response program. Federal WARN requires notice to the state dislocated worker unit, which in Arizona is the DES Rapid Response program. Notice must also go to each affected employee (or their union representative) and to the chief elected official of the local government where the layoff will occur.

Our company relocated from California to Arizona. Do our California employees still have Cal-WARN protections?

Yes. Cal-WARN applies to employees at California sites regardless of where the company is headquartered. If your company retains employees at a California location, Cal-WARN governs those employees and that site. Relocating your headquarters to Arizona does not extinguish Cal-WARN obligations for your remaining California operations.

Does WARN apply to semiconductor fab layoffs in Arizona?

Yes, if the employer has 100 or more full-time employees and 50 or more workers at the affected Arizona site lose employment. Phoenix is one of the largest semiconductor manufacturing hubs in the United States, with large single-site workforces at facilities operated by Intel, TSMC, and Microchip Technology. The semiconductor industry's large headcounts make WARN a common compliance consideration for Arizona fab closures or production shifts.

Does the Ninth Circuit hear Arizona WARN cases?

Yes. Arizona federal courts are in the Ninth Circuit, which also covers California. The Ninth Circuit has significant WARN Act case law developed from Cal-WARN litigation. Arizona WARN claims are filed in U.S. District Court, and courts in this circuit are experienced with WARN Act analysis.

People Plan

Federal WARN coverage calculated automatically

People Plan determines federal WARN coverage from your employee data, calculates the notice period and required recipients for each Arizona site, and generates the required written notices — so your legal team reviews rather than drafts.

Legal disclaimer

This guide is provided for general informational purposes and does not constitute legal advice. WARN Act analysis is fact-specific and depends on exact headcounts, site definitions, and timing. Always have employment counsel review WARN obligations before issuing or declining to issue notice. People Plan is not a law firm.