Interactive tools
WARN Act Tools & Calculators
Practical, no-sign-up calculators built around the federal WARN Act and what it means for workers, eligibility, the value of the notice period, and layoff risk by sector.
Amazon filing #1 is not United Airlines workers #1
According to WARN Act filings submitted to state workforce agencies, Amazon ranks #1 of 7,009 by recorded WARN filing count (114 notices, 41,969 workers, workers rank #2). United Airlines ranks #1 of 7,009 by workers on notice (42,706 workers across 9 filings, filing rank #35). The most frequent filer is not the largest worker total. These calculators apply that recorded split to eligibility, notice-period pay, and industry risk checks (as of September 2026).
- Amazon 114 filings · workers rank #2
- United Airlines 42,706 workers · filing rank #35
Most filings is not most workers
Recorded WARN notice count for the filing #1 and workers #1 employers among 7,009 in this pool
- Amazon
Amazon
114 filings
- United Airlines 9
United Airlines
9 filings
What this shows Amazon leads the filing-count ranking; United Airlines leads workers on notice in the same pool.
Many filings is not the same as many workers
Among 7,009 recorded employers with both filings and worker counts, Amazon ranks #1 by WARN filing count (114 notices) but #2 by workers on notice (41,969 workers). United Airlines leads on workers (#1, 42,706) while filing rank is #35 - many small repeated filings and a few massive rounds occupy different corners of the same chart. The calculators below apply the same recorded corpus.
WARN filings vs workers on notice
Each dot is one employer among 7,009 with recorded filings; axes are within-pool percentiles
Read the chart (crawlable values)
- Pool: 7,009 employers with at least one recorded WARN notice and positive worker total (as of September 2026).
- Median employer: 1 filings · 74 workers on notice.
- Amazon: 114 filings (filing percentile 100) · 41,969 workers (worker percentile 100).
- United Airlines: 9 filings (filing percentile 100) · 42,706 workers (worker percentile 100).
- Peer cloud: 72 employers sampled from the pool (excluding the highlighted leaders).
According to the U.S. Department of Labor, the federal WARN Act has required 60 days’ advance notice of mass layoffs since 1988. PlainLayoffs has compiled 9,006 WARN notices covering 1,433,550 workers; these tools turn those public rules into quick, no-sign-up answers. See our methodology for sourcing.
How 3 calculators split by job
Exclusive purpose partition from each tool card. Orthogonal to the filing dual chart above.
How 7,035 recorded employers split by workers-on-notice size
Exclusive size bands from the employers table (total_workers). The impact checker uses the same corpus when comparing industry bands.
WARN Eligibility Checker
Does a planned layoff trigger the federal WARN Act 60-day notice? Test it from employer size, workers affected, and share of the site workforce.
Open tool →WARN Notice & Severance Estimator
Value the 60-day WARN notice period in pay, plus a typical severance range for your tenure, to sanity-check an offer after a layoff.
Open tool →Layoff Impact Risk Checker
See how WARN Act layoff activity in your industry and company-size band compares to the national pattern.
Open tool →Why it matters
These calculators use the public WARN-notice record this site tracks; a filing is evidence, not a legal determination, and coverage still depends on the event facts and applicable law.
The data behind these tools
What the WARN record shows
- 9,006
- WARN notices tracked
- 1,433,550
- Workers on notice
- 7,035
- Employers filing
What a layoff result can verify
Coverage of each data layer within PlainLayoffs' recorded WARN-notice corpus
- Recorded WARN notice
Recorded WARN notice
100% coverage
- Employer history
Employer history
100% coverage
- Industry context
Industry context
100% coverage
- Effective date
Effective date
100% coverage
- City or locality
City or locality
97% coverage
What this shows Every bar describes a field in the records we hold, not the completeness of any state's registry. A lower bar means that layer is unavailable for some recorded notices and should not be assumed.
About these tools
Each tool runs entirely in your browser, nothing you enter is sent anywhere or stored. They are educational aids built on the public rules of the federal WARN Act and observed WARN filing patterns, and they are not legal or financial advice. For the law itself and what it means in practice, see our WARN Act guide and methodology.
Where to start
Three quick checks if you've received, or expect, a WARN notice.
- Check the employer, worksite, event size, workforce share, timing, and exceptions that affect WARN coverage. WARN eligibility checker
- Estimate the notice pay you may be owed if the required 60-day warning was skipped. WARN pay estimator
- Gauge the wider impact of a layoff round and your next financial steps. Layoff impact checker
These tools apply the federal WARN Act rules; many states have stricter mini-WARN laws with lower thresholds, so confirm your state's rules too.
Source: U.S. Department of Labor, WARN Act Federal WARN Act rules and state workforce agency filings compiled by PlainLayoffs · September 2026 Tools run in-browser and are educational aids, not legal advice.
Download the compiled employer roster cited on this page: employers.csv (notice counts, workers affected, primary state and industry). Full CSV and JSON live on /data.
Spotted a figure that looks wrong? Report a correction.