Running a RIF you can defend
A reduction is the highest-stakes people decision a lean team makes. The defensible ones run in a fixed order. It is the business case, then the criteria, then the impact test, then the waivers and the notice. Here is the sequence, the federal rules attached to each step, and the traps that turn a clean list into a claim.
How this note is governed
Applies to US employers planning a reduction in force. Federal EEOC guidance, the OWBPA, and the WARN Act. Many states set longer notice and add their own terms.
Short answer
As of July 2026: write and date the business reason, set objective criteria before any names, then test the list against the 80% four-fifths line. OWBPA gives 45 days in a group program. WARN gives 60.
Published Last verified
The EEOC layoff guidance and the OWBPA regulation were rechecked. The 80% four-fifths line, the 45-day consideration period, and the 60-day WARN notice were unchanged.
- 80%
- The four-fifths line. A group kept at less than 80% of the top group’s retention rate is a federal screening flag to resolve before the list is final.
- 45 days
- Minimum consideration time for an age-40-and-over release in a group termination program, with 7 days to revoke after signing. Set by the OWBPA.
- 60 days
- Federal WARN notice before a covered plant closing or mass layoff at employers with 100 or more employees. Many states require more.
Write the business case before you write names
Every defensible reduction starts with a dated, written statement of why: which costs, which functions, which change in the work. The EEOC frames the employer’s first job in a layoff as identifying the legitimate business reason behind it. Employment lawyers say the same thing from the other direction. The memo you write before the decision is evidence, and the memo you write after it is damage control. Note the alternatives you considered on the way, such as a hiring freeze, attrition, reduced hours, or a voluntary program. Note why they did not get there. A position elimination is a decision about the work, so keep the language about roles and functions rather than about individuals.
The selection criteria worksheet, the Adverse-Impact Review across age, sex, and race or ethnicity, and the documentation trail. The steps in this note then happen in order and on paper.
Set objective criteria before the list exists
Selection criteria get written, approved, and dated before anyone runs them against people. The defensible ones are structural and observable. They are the skills the go-forward work requires, redundancy between roles, and the documented performance record. Seniority counts too, where it is lawful and consistent with your agreements. Subjective or shifting criteria are what discrimination claims are built on. Every manager in the decisional unit applies the same factors the same way. Any exception gets a written reason at the time it is made.
Performance deserves a caution. It is a lawful factor, and it is also the one most often attacked as pretext, because it turns on the file you actually have. If the record is thin or contradicts the ranking, the criterion works against you. Use the documented record, not the reputation. And some things are never criteria at all: leave status, an accommodation, a complaint, or any protected characteristic.
Test the list before it is final
Run the criteria and produce the list, then test it while it can still change. The EEOC’s guidance for small employers walks the exact sequence. List who would be laid off under your criteria. Compare each group’s share of the list against its share of the workforce. Where one group is affected at a clearly higher rate, ask whether adjusted criteria would still meet the business need.
The standard screen is the four-fifths rule from the federal Uniform Guidelines. Work out each group’s retention rate, divide it by the highest group’s rate, and treat anything below 80% as a flag. You can run that math in the browser with the free Adverse Impact Calculator. The four-fifths note covers what the flag does and does not mean. Two cautions come from the Guidelines themselves. The ratio is unstable on small groups. On large numbers even a passing ratio can matter if the difference is statistically significant. That is why consequential reductions get a significance test alongside the screen. Document the analysis you ran and any adjustments you made, because the test only protects you if it happened before the decision was final.
Get the over-40 waivers right
Most reductions offer severance in exchange for a release of claims. The moment anyone signing is 40 or over, the release must meet the OWBPA’s knowing and voluntary standard. The requirements are mechanical. They are plain language, a specific reference to ADEA rights, and written advice to consult an attorney. They are consideration beyond what the person is already entitled to. They are at least 21 days to consider an individual agreement, or 45 days in a group program. They are a 7 day revocation period after signing that cannot be shortened or waived.
Group programs carry one more requirement that trips employers constantly. It is a written disclosure, delivered when the consideration period starts. It describes the decisional unit, the eligibility factors, and any time limits. It also lists the job titles and ages of everyone selected and everyone considered but not selected. Material changes to the final offer restart the clock. A defective waiver cannot be cured with a follow-up letter. No waiver can stop anyone from filing an EEOC charge or participating in an investigation. The OWBPA release rules note covers the full checklist.
Check the notice thresholds
Federal WARN requires employers with 100 or more employees to give at least 60 calendar days of written notice. That applies before a covered plant closing or mass layoff. One trigger is a closing that costs 50 or more jobs at a single site. Another is a layoff of 50 to 499 that is at least 33% of the active workforce there. A third is 500 or more regardless of share. Separate smaller layoffs within any 90 day window aggregate toward the thresholds, so a reduction run in waves does not escape the math. Many states layer stricter mini-WARN rules on top, with lower headcounts or longer notice, so the state check is part of the federal check. The WARN Act note carries the details and the exceptions.
The traps that sink otherwise clean lists
The recurring failures are timing and drift. A selection that lands next to a leave request, an accommodation, or a complaint reads as retaliation. It draws exactly that scrutiny. Check every name on the list for protected activity and recent leave before it goes final. Three things undercut the business case you wrote in step one. They are managers applying the criteria differently across units, and exceptions granted without a written reason. The third is a role recreated shortly after it was eliminated. And relabeling a performance exit as a restructuring does not work, because courts look through the label to the facts.
A flagged group may survive on the final list, or you may be defending criteria after the fact. The reduction may touch employees on protected leave. In any of those cases, get legal advice before you proceed. The stakes are highest exactly here, where a selection decision can become the center of a claim. This is general information.
Six red flags to check before you fire someone
Free, and written to the same standard
A five minute screen to run before you act, sent to your inbox as a print-ready PDF. Every figure in it traces to a reference note like this one.
Where these figures come from
6 citations checked, newest check 1 July 2026
- EEOC, Avoiding Discrimination in Layoffs or Reductions in Force. The agency’s own walkthrough for employers. Identify the business reason, apply layoff criteria, and list who would be affected. Compare group impact, and adjust criteria where a group is disproportionately affected while still meeting the business need. eeoc.gov, layoffs and RIF guidance eeoc.gov
- Uniform Guidelines on Employee Selection Procedures, 29 CFR 1607.4(D). The four-fifths rule. A selection rate below four-fifths (80%) of the highest group’s rate is generally regarded by the federal enforcement agencies as evidence of adverse impact. The small-numbers and statistical-significance caveats sit in the same section. ecfr.gov, 29 CFR 1607.4 ecfr.gov
- EEOC, Questions and Answers on the Uniform Guidelines. The enforcement Q and A behind the screen. It carries the four step method, the 80% rule of thumb, and the general 2% analysis floor. It states that the rule draws an initial inference rather than resolving unlawful discrimination. eeoc.gov, UGESP Q and A eeoc.gov
- Waivers of rights and claims under the ADEA, 29 CFR 1625.22. The OWBPA regulation. It carries the knowing and voluntary elements, and the 21 and 45 day consideration periods. It carries the 7 day revocation that cannot be shortened, the restart on material changes, and the group-program informational disclosure. eeoc.gov, 29 CFR 1625.22 eeoc.gov
- Older Workers Benefit Protection Act of 1990, Title II. The statute amending ADEA section 7(f). It carries the waiver requirements themselves. Those include the group disclosure of covered units, eligibility factors, and time limits. They include the job titles and ages of individuals selected and not selected. eeoc.gov, OWBPA text eeoc.gov
- U.S. Department of Labor, Plant Closings and Layoffs (WARN). The federal notice rule: 100 or more employees, 60 calendar days, the plant closing and mass layoff triggers, and who must receive the notice. dol.gov, WARN overview dol.gov
Common questions
What makes a RIF selection defensible?
Order and paper. The business reason is documented before anyone picks names. The selection criteria are objective and written down in advance. The resulting list is tested for adverse impact while it can still change. The over-40 waivers follow the OWBPA rules exactly, and the WARN math is checked before dates are set. Employers get in trouble when the sequence runs backwards, with names chosen first and the rationale assembled afterward.
Can performance be a selection criterion?
Yes, and it is common, but it invites pretext arguments when the paper trail is thin. If the person you cut has years of fine reviews and the person you keep has none, the file works against you. Use the documented record you actually have, and apply it the same way across the decisional unit. Pair it with structural factors such as skills the go-forward work needs and role redundancy.
How do I test a layoff list for adverse impact?
Run the criteria, list who would go, then compare each group on the list against the workforce it came from. The EEOC walks employers through exactly this. If one group is affected at a clearly higher rate, ask whether adjusted criteria would still meet the business need. The four-fifths rule is the standard screen. It compares retention rates across groups against the highest rate. Anything below 80% is a flag to resolve before the list is final.
What are the over-40 waiver requirements in a group layoff?
A release of age claims from anyone 40 or over must be knowing and voluntary under the OWBPA. That means plain language, a specific reference to the ADEA, and written advice to consult an attorney. It means consideration beyond what the person is already owed. It means at least 45 days to consider in a group program, and 7 days to revoke after signing. Group programs also require a written disclosure. It lists the decisional unit, the eligibility factors, and any time limits. It lists the job titles and ages of everyone selected and not selected.
When does the WARN Act apply?
The federal WARN Act covers employers with 100 or more employees. It requires 60 calendar days of written notice before a covered plant closing or mass layoff. One trigger is a closing affecting 50 or more at a single site. Another is a layoff of 50 to 499 that is at least 33% of the site. A third is 500 or more regardless of share. Smaller layoffs within any 90 day window aggregate toward the thresholds, and many states set stricter mini-WARN rules on top.
Put it to work
The selection criteria worksheet, the Adverse-Impact Review across age, sex, and race or ethnicity, and the documentation trail. The steps in this note then happen in order and on paper.
$129Run the four-fifths check on your draft list in the browser. Enter each group considered and kept, and see every rate, every ratio, and any group below the 80% line.
FreePrice the reduction before you commit to it. That is severance, benefits runout, and the true net savings by role and by month. The business case in step one then has real numbers behind it.
Free
This note is general information about employment practice rather than legal advice for your situation. Check the review date and the jurisdictions above, follow the source link, and confirm the rule before you act on it.