California WARN Act vs federal WARN

Cal-WARN scope (Cal. Lab. Code §§ 1400-1408)#

California has its own mass-layoff-notice statute, codified at Cal. Lab. Code §§ 1400 through 1408 and self-styled in § 1400 as the "California Worker Adjustment and Retraining Act" or "Cal/WARN Act." The chapter sits in the Labor Code rather than in federal law, is enforced by the Labor Commissioner rather than by the U.S. Department of Labor, and operates in parallel with the federal WARN Act (29 U.S.C. §§ 2101 et seq.). A California employer ordering a layoff can be subject to both statutes at once; a layoff that does not trigger federal WARN can still trigger Cal-WARN, and the broader Cal-WARN scope is usually what matters in practice.

Three definitions in § 1400 do most of the work. First, "employer" means a person or business that employs, or has employed in the preceding 12 months, 75 or more persons. The threshold is 75 — not 100 like federal WARN — and the look-back counts both full-time and part-time employees rather than only full-time. A California employer that briefly crossed 75 employees in the prior year, then dropped below, is still covered. Second, "covered establishment" means any industrial or commercial facility (or part of one) that employs, or has employed within the preceding 12 months, 75 or more persons. Third, "mass layoff" means a layoff during any 30-day period of 50 or more employees at a covered establishment. There is no 33%-of-workforce floor, and there is no requirement that the layoff hit a single site as that term is interpreted under federal WARN.

§ 1400 also defines "relocation" and "termination" — the two other triggers that, together with mass layoff, fall under the 60-day-notice rule. Relocation is the removal of all or substantially all of the industrial or commercial operations of a covered establishment to a different location 100 miles or more away. Termination is the cessation or substantial cessation of the industrial or commercial operations of a covered establishment. A California employer planning a relocation 100 miles away or a permanent shutdown of a facility owes the same 60-day notice as one ordering a mass layoff, regardless of how many employees move with the operation.

Cal-WARN applies to every covered establishment located in California. The Labor Code does not look at the employer's national headcount alone — what matters is the headcount at and across California operations meeting the "covered establishment" test. A national employer with 5,000 employees but no California facility of 75+ is not a Cal-WARN employer; an employer with 80 California employees at a single facility is, even if the corporate parent is small overall. This is one of the reasons Cal-WARN frequently catches employers that thought they were below the federal WARN line.

The Labor Commissioner administers Cal-WARN with both private-right-of-action and enforcement authority. Affected employees can file a civil action under § 1404 (back pay and benefits per § 1402), and the Labor Commissioner can collect civil penalties under § 1403. The EDD's Layoff Services WARN page explains the parallel notification obligations to the EDD, the local workforce development area, and the chief elected official of each local government within which the layoff occurs — the same agency-notification list that federal WARN requires, plus a coordination-with-rapid-response-services obligation added by SB 617 effective January 1, 2026.

Federal WARN scope (29 U.S.C. § 2102)#

The federal Worker Adjustment and Retraining Notification Act (WARN), codified at 29 U.S.C. §§ 2101–2109, sets the baseline notice obligation that applies to large employers nationwide. The employer-size threshold is 100 or more full-time employees, or 100 or more employees who in the aggregate work at least 4,000 hours per week (exclusive of overtime). Part-time employees — defined as those averaging fewer than 20 hours per week or who have been employed fewer than six months — do not count toward the 100-employee threshold for federal WARN. This is the first place federal and Cal-WARN diverge: California counts every employee toward 75, while federal WARN looks only at full-time equivalents toward 100.

Federal WARN's trigger events are also defined more narrowly than Cal-WARN's. A "mass layoff" under 29 U.S.C. § 2101(a)(3) means a reduction in force that results in employment loss at the single site of employment during any 30-day period for either (i) at least 33% of the active employees AND at least 50 employees, or (ii) at least 500 employees regardless of percentage. The 33% floor is the practical kill switch in many layoff scenarios. A 120-employee California retailer that lays off 60 people at a store has a 50%-of-workforce reduction and clears the 33% floor, so federal WARN applies. The same retailer with 1,200 employees laying off 60 at a single store has a 5%-of-workforce reduction and does NOT clear the 33% floor — federal WARN does not apply, even though the same 60 people lose their jobs in the same way.

A "plant closing" under federal WARN means the permanent or temporary shutdown of a single site of employment, or one or more facilities or operating units within a single site, that results in employment loss for 50 or more full-time employees during any 30-day period. Note the difference from Cal-WARN: federal "plant closing" is about a shutdown that hits 50 employees; California "termination" is about cessation of operations regardless of how many workers are affected. Federal WARN also includes "single site of employment" as a regulatory term of art under 20 C.F.R. § 639.3, which the U.S. Department of Labor and federal courts have applied to mean a single geographic location, occasionally allowing aggregation of contiguous or operationally unified sites but generally treating separate buildings or remote locations as separate sites. A layoff of 30 at HQ and 25 at a separate satellite — 55 total — may fall outside federal WARN because neither site individually clears the 50-employee threshold.

The 60-day notice period is the same under both statutes. The notice must go to either the bargaining representative of the affected employees or, if there is no representative, to each affected employee directly; and to the state dislocated-worker entity and the chief elected official of the local government where the layoff is to occur. The federal notice content is governed by 20 C.F.R. § 639.7 and includes the expected date of the layoff, whether the layoff is permanent or temporary, and the name of a company contact. California layers additional content requirements on top of the federal items via § 1401 and SB 617 (2026), including CalFresh information and rapid-response coordination details.

Side-by-side: when each statute applies#

The practical question for most California employees is whether their layoff triggers federal WARN, Cal-WARN, both, or neither — and the answer often differs between the two statutes for the same set of facts. The most common pattern is a layoff that triggers Cal-WARN but not federal WARN. That happens because Cal-WARN's employer threshold is lower (75 vs 100), Cal-WARN has no 33%-of-workforce floor, and Cal-WARN does not depend on the federal "single site of employment" analysis. The worked-example table below walks through three scenarios that highlight each of these gaps in turn.

Scenario one: an 80-employee California tech company lays off 55 employees at its only office. Federal WARN does not apply because the employer is below the 100-employee floor. Cal-WARN does apply because the employer is above the 75-employee floor and 50+ employees are losing their jobs at a covered establishment in a 30-day period. The Cal-WARN-only outcome happens routinely for California companies in the 75-to-99-employee band, and is one of the most underappreciated features of the state statute. Affected employees are entitled to 60 days written notice or, if notice was not given, to back pay and benefits per § 1402 plus the civil penalty per § 1403.

Scenario two: a 200-employee California biotech lays off 30 at headquarters and 25 at a satellite location (55 total) in the same 30-day window. Federal WARN may not apply because the single-site analysis under 20 C.F.R. § 639.3 may treat HQ and the satellite as separate sites, and neither site individually crosses 50 employees. Cal-WARN does apply if both sites are "covered establishments" (each employing 75+ in the preceding 12 months) and the layoff at each constitutes a "mass layoff" or — under the DLSE's and EDD's practical interpretation — if the same employer's actions across covered California establishments aggregate to 50+ in a 30-day period. The EDD Layoff Services WARN guidance is the practical reference here, and the difference matters most for multi-site California employers.

Scenario three: a 120-employee California retailer lays off 60 employees at one store. The 60 employees represent 50% of the workforce at that store but only 50% of the company, which is above the 33% federal floor — so federal WARN does apply if the 60 affected meet the single-site definition. Now flip the numbers: a 400-employee retailer with the same 60-employee layoff at one store represents 15% of the company and does not clear the 33% federal floor, so federal WARN does not apply; Cal-WARN still does, because there is no California percentage floor. The 33% federal floor is one of the most common reasons large California employers under-notify, and one of the most common reasons Cal-WARN-only claims succeed.

A useful diagnostic: if the California employer is at or above 75 employees and the layoff hits 50+ at a covered establishment in 30 days, assume Cal-WARN applies and assume the 60-day-notice rule attaches. Whether federal WARN ALSO applies depends on the size of the employer (100+ FTE), the percentage (33%) of the active workforce affected, and the single-site analysis. The two statutes layer rather than substitute: a layoff covered by both gets 60-day notice and remedies under both, and employer compliance with the more protective Cal-WARN regime generally satisfies the federal regime as well.

Penalties for noncompliance#

The remedy for a federal WARN violation is set out in 29 U.S.C. § 2104. An employer who orders a plant closing or mass layoff in violation of § 2102 is liable to each aggrieved employee who suffers an employment loss for back pay at the higher of the average regular rate received over the last three years or the final regular rate, plus benefits under any employee benefit plan including the cost of medical expenses incurred during the employment loss that would have been covered. The liability period equals the period of the violation up to a maximum of 60 days, but in no event more than one-half the number of days the employee was employed. Employer payments to the employee during the violation period — wages, voluntary employer payments not legally required, and third-party benefit payments — reduce the liability dollar for dollar. The same liability is the exclusive federal remedy; § 2104(b) bars injunctions and forbids courts from enjoining a closing or layoff under the chapter.

Cal-WARN borrows the back-pay-and-benefits liability framework from federal WARN but adds a uniquely California civil penalty. Section 1402 makes a Cal-WARN-violating employer liable to each affected employee for back pay calculated at the average regular rate of compensation during the last three years of employment or the employee's final rate, whichever is higher, plus the value of the cost of any benefits the employee would have been entitled to had employment not been lost, including the cost of any medical expenses. The liability cap is 60 days or one-half the number of days the employee was employed, whichever is smaller — the same federal cap. Employer payments to the employee during the violation period reduce liability the same way. The § 1402 remedy is enforceable by the affected employees in a civil action under § 1404 and by the Labor Commissioner.

On top of § 1402, Cal-WARN adds § 1403 — the $500-per-day civil penalty for each day of the violation, payable to the State of California (collected by the Labor Commissioner). Section 1403 provides an escape: an employer that pays affected employees the amounts owed under § 1402 within three weeks of ordering the mass layoff, relocation, or termination is not subject to the civil penalty. The three-week safe harbor encourages prompt make-whole payment when an employer realizes a violation has occurred, but it does not retroactively cure the violation for back-pay purposes — the § 1402 amount is still owed. The combined exposure (back pay + benefits + up to $500/day) is what makes Cal-WARN materially more employee-favorable than federal WARN at the penalty stage.

A worked illustration: an employer that fails to give Cal-WARN notice to 60 affected employees and lays them off without payment for 45 days before any cure is attempted owes each employee 45 days of back pay (capped at 60), 45 days of benefits value, AND the State of California up to $500 × 45 = $22,500 per day of violation in civil penalty (penalty is per violation, not per employee). Where federal WARN would only attach the per-employee back-pay-and-benefits liability, Cal-WARN adds the state-level civil-penalty layer. Employer counsel routinely advise that the cure-within-three-weeks safe harbor under § 1403 is the practical lever — when a violation is discovered, the strong incentive is to pay quickly to extinguish the daily-penalty meter, then dispute § 1402 amounts if necessary.

Exceptions and exemptions#

Both statutes carve out a narrow set of exceptions that REDUCE the 60-day notice obligation without eliminating it. Federal WARN's exceptions are codified at 29 U.S.C. § 2102(b). The "faltering company" exception applies when the employer was actively seeking capital or business that, if obtained, would have enabled the employer to avoid or postpone the shutdown, and the employer reasonably believed in good faith that giving the notice would have precluded obtaining the capital or business. The "unforeseeable business circumstances" exception applies when a closing or mass layoff is caused by business circumstances that were not reasonably foreseeable as of the time notice would have been required. In both cases the employer must give as much notice as is practicable and at that time give a brief statement of the basis for reducing the notification period. The exceptions reduce the 60-day period, they do not eliminate the duty to notify.

The natural-disaster exception under § 2102(b)(2)(B) is the only federal exception that can fully eliminate notice. The statute provides that "no notice under this chapter shall be required if the plant closing or mass layoff is due to any form of natural disaster, such as a flood, earthquake, or the drought currently ravaging the farmlands of the United States." Even here, the U.S. Department of Labor regulations at 20 C.F.R. § 639.9(c) require the employer to give as much notice as practicable and to identify the natural-disaster basis. Pandemic-era litigation tested the boundaries of "unforeseeable business circumstances" and "natural disaster" in 2020; federal courts have generally treated COVID-19 as a potentially qualifying unforeseeable circumstance rather than a natural disaster, requiring the practicable-notice carveout to apply rather than fully excusing notice.

Cal-WARN's exceptions are narrower than federal WARN's and live in § 1401(c)–(d) and the case-law gloss developed under the statute. Section 1401(c) provides that the 60-day notice requirement does not apply to a mass layoff, relocation, or termination "necessitated by a physical calamity or act of war." That is a narrower text than federal WARN's combined faltering-company and unforeseeable-business-circumstances exceptions, and the DLSE has historically read it strictly: a physical calamity means earthquake, flood, fire, or similar physical event, and "act of war" means a formal act of war. Economic downturns, lost contracts, or sudden customer-loss events are not "physical calamities" for Cal-WARN purposes, even when they would qualify as "unforeseeable business circumstances" under federal WARN.

A California employer claiming a federal-WARN exception that does not exist under Cal-WARN can still be liable under Cal-WARN. The pandemic illustrated this gap: some California employers relied on the federal "unforeseeable business circumstances" exception to reduce or skip WARN notice in spring 2020, only to face Cal-WARN exposure because the California statute has no parallel exception. The DLSE issued enforcement guidance during the pandemic loosening Cal-WARN penalties on a temporary basis (Executive Order N-31-20), but that was a discretionary state action rather than a statutory exception, and the underlying § 1402 back-pay-and-benefits liability remained.

Both statutes also include a "faltering company"-style flexibility for advance notice in specific circumstances enumerated by regulation, and both excuse notice if the layoff is the direct result of a strike or lockout that is not intended to evade the notice requirement. The structural takeaway is that Cal-WARN's exception set is materially smaller than federal WARN's, which means the California-only band of cases — employers between 75 and 99 employees, large California employers below the 33% federal floor, or multi-site California employers that fall outside the single-site definition — typically owes 60-day notice when federal WARN does not, AND has fewer doors to claim an exception. The combination is what makes Cal-WARN one of the most employer-restrictive mass-layoff-notice regimes in the country.

Worked example#

Cal-WARN's "covered establishment" analysis can produce different results from federal WARN's "single site of employment" analysis even for the same physical address. Where the difference matters, consult the EDD Layoff Services WARN guidance or an employment lawyer. Federal WARN single-site analysis is governed by 20 C.F.R. § 639.3; Cal-WARN coverage is governed by Cal. Lab. Code § 1400.

Calculate your California severance#

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Frequently asked#

Sources#

• Cal. Lab. Code § 1400 — Cal/WARN Act citation and definitions · CA Labor Code
• Cal. Lab. Code § 1401 — 60-day notice requirement · CA Labor Code
• Cal. Lab. Code § 1402 — Back-pay and benefits liability · CA Labor Code
• Cal. Lab. Code § 1403 — $500/day civil penalty · CA Labor Code
• 29 U.S.C. § 2102 — Federal WARN notice requirement and exceptions · Other
• 29 U.S.C. § 2104 — Federal WARN back-pay-and-benefits liability · Other
• EDD Layoff Services — WARN Act page · EDD