Workplace Mobbing: When It Is the Group, Not One Bully

By David M. · Published 16 August 2026, updated 12 September 2026 · Verified 16 August 2026 · Editorial policy

Applies to the United States.

Not legal advice. The rules change from state to state, and federal courts do not all read them the same way. No page can cover your own facts, so if a deadline or a decision is close, talk to an employment lawyer where you live.

Mobbing is a sequence, not a mood: an ordinary work conflict becomes a group behavior and then reaches management with the target already framed as the problem. Outside Puerto Rico, mobbing as such is not illegal in the United States; what is actionable is the narrow slice that maps onto a protected characteristic.

What is considered mobbing at work, and how is it different from bullying?

One bully leaves one account to contradict; a group leaves none, each incident is thin enough to look trivial, and by the time anyone counts them the count is the evidence. Where the conduct traces to one person rather than a group, the signs of a toxic boss are the better starting point.

Heinz Leymann’s 1990 paper in Violence and Victims 5(2): 119–126 named the pattern from the group side: employees “ganging up” on a target employee and subjecting him or her to psychological harassment, with “severe psychological and occupational consequences for the victim.” The axis is repetition over time. US harassment law also looks at repetition over time.

What are the phases of workplace mobbing?

Four. The US Department of Justice NCJRS abstract of Leymann’s paper gives the sequence: an original critical incident “usually a conflict over work,” then mobbing and stigmatization, then “the workplace’s management intervenes in the third stage, personnel administration, where the supervisor usually takes over the prejudices of the mobbers,” then expulsion.

Phase	From inside	Still possible here	Stops being possible
1. Original critical incident	A disagreement over a decision, a credit, a schedule. Ordinary and closable.	Naming it in writing while it is still only a work conflict.	Nothing yet. This is the only phase with no cost of delay.
2. Mobbing and stigmatization	Meetings you stop being invited to; work reassigned without notice; a version of you circulating that you meet before you meet the person.	Dated contemporaneous entries; noting who was present but not part of it; a first written complaint if a protected characteristic is in play.	Being read as neutral. Informal resolution, because the group has a shared account now, and no member gains by breaking it.
3. Personnel administration	HR engages, and the meeting is about your performance, your “fit,” your tone, your absence record. A PIP, a warning, an investigation into you.	Correcting the frame in writing, on the file, in one document. Filing externally. Advice before responding.	HR as a neutral forum, usually, and any chance the file describes the group’s conduct rather than yours. Everything after reads as your reaction to it.
4. Expulsion	The exit: a negotiated departure, a termination, a role emptied of work, or leave you never return from.	Filing deadlines. Legal advice before resigning.	Internal remedies, and most of a claim’s value if you resign first.

“Let HR handle it” is calibrated for phase 1 and weakest in phase 3, the point at which a formal process about you already exists. Once that process is open, the question is how to get the pattern on the record before the file closes. See your rights in an HR investigation.

What are the signs of workplace mobbing?

Sahin et al., Croatian Medical Journal 53: 357–366 (2012) administered the Leymann Inventory of Psychological Terror and recorded 45 mobbing behavior types in five dimensions, citing Leymann’s 1996 paper in the European Journal of Work and Organizational Psychology 5(2): 165–184.

LIPT category	Items	Example
Threatening communication	1–11	Talked over by three different people in one stand-up; messages unanswered while posts a minute later get replies.
Threatening social contacts	12–16	The team lunch is arranged in a channel you were removed from. See being iced out at work.
Threatening personal reputation	17–31	Someone in another department repeats back an account of a meeting you attended, materially different from what happened. See scapegoating and smear campaigns.
Threatening occupational situation	32–40	Deliverables assigned to you in writing are reassigned verbally in a meeting; work two grades below your role, or none at all.
Threatening physical health	41–45	Unsafe shift or travel assignments nobody else is given; blocking a doorway, standing over a desk.

Spread and repetition are what the inventory measures: incidents across several of those categories, recurring.

Is workplace mobbing illegal in the United States?

No. There is no federal and, with one exception, no state cause of action for mobbing as such: an employer may lawfully run a hostile, exclusionary workplace provided the hostility is not because of something the law protects. Four routes exist.

1. Protected characteristic: the main route. 42 U.S.C. § 2000e-2(a)(1) makes it unlawful to “discriminate against any individual with respect to his compensation, terms, conditions, or privileges of employment, because of such individual’s race, color, religion, sex, or national origin.” Disability is covered by 42 U.S.C. § 12112(a), age 40 and over by the ADEA. Mobbing becomes illegal because the group’s selection of you tracks one of those categories. The same threshold separates favoritism at work that is merely unfair from favoritism that is unlawful.

2. The standard to write to is Harris, not EEOC guidance. The EEOC’s 2024 Enforcement Guidance on Harassment in the Workplace, still cited across this topic as live law, is not: the EEOC’s own newsroom records that the Commission “voted 2-1 yesterday to rescind” it. The vote was 22 January 2026, and the web page for the rescinded guidance is now gone.

Chair Andrea Lucas: “Federal employment laws against discrimination, harassment, and retaliation, and Supreme Court precedent interpreting those laws, remain firmly in place.” No replacement has issued as of 16 August 2026, and the EEOC’s harassment page carries a “being reviewed for compliance with the law and executive orders” banner.

Cite the case instead. The opinion in Harris v. Forklift Systems, Inc., 510 U.S. 17 (1993), unanimous, decided 9 November 1993, puts it this way: “When the workplace is permeated with ‘discriminatory intimidation, ridicule, and insult,’ that is ‘sufficiently severe or pervasive to alter the conditions of the victim’s employment and create an abusive working environment,’ Title VII is violated.”

Whether an environment is hostile “can be determined only by looking at all the circumstances,” which “may include the frequency of the discriminatory conduct; its severity; whether it is physically threatening or humiliating, or a mere offensive utterance; and whether it unreasonably interferes with an employee’s work performance.”

“Severe or pervasive” is a disjunction, and mobbing lives on the second limb. Individual mobbing incidents rarely look severe on their own. Harris lists frequency as a factor in its own right, and adds that “while psychological harm, like any other relevant factor, may be taken into account, no single factor is required.” That is a direction to weigh the whole picture. It is not a ruling that frequency alone carries a case.

A twelve-month pattern of thin, dateable, repeated conduct is the shape a pervasiveness argument has to take. The ceiling on it is set in Faragher v. City of Boca Raton, 524 U.S. 775, 788 (1998): “simple teasing,” offhand comments, and isolated incidents (unless extremely serious) “will not amount to discriminatory changes in the ‘terms and conditions of employment.'” Counting trivia is not the same as counting conduct.

3. Concerted activity, after a group complaint. If the isolation began after you raised something with colleagues, 29 U.S.C. § 157 protects “concerted activities for the purpose of collective bargaining or other mutual aid or protection,” and the NLRB confirms a lone employee is covered when “bringing group complaints to the employer’s attention” or “seeking to prepare for group action.” The charge window is six months: NLRA § 10(b), 29 U.S.C. § 160(b) bars a complaint “based upon any unfair labor practice occurring more than six months prior to the filing of the charge.” The Board often reverses itself on this point. Check the NLRB’s latest decisions before relying on it.

4. Puerto Rico, and only Puerto Rico. Act 90-2020, signed 7 August 2020, is the only US jurisdiction with a general workplace-bullying statute reaching private employers with a private cause of action: Article 11 imposes civil liability for acoso laboral and Article 12 gives one year to sue. The Puerto Rico Department of Labor’s 2021 private-sector guidelines confirm it reaches “todas las organizaciones o empresas del sector privado,” and the conduct need not track a protected category. That is the element the mainland lacks.

Tennessee is not an anti-bullying state

The most common false statement on this topic, exactly backwards: Tennessee’s Healthy Workplace Act gives employers a shield, not employees a claim. Tenn. Code Ann. § 50-1-504 is headed “Immunity of employer when policy adopted — Cause of action against employer not created,” and the enacted text at 2019 Tennessee Public Chapter 214 (HB 856, approved 23 April 2019) says it plainly at subsection (b): “Nothing in this section creates a cause of action against an employer who does not adopt the model policy created by TACIR.”

An employer that does adopt it “is immune from suit for any employee’s abusive conduct that results in negligent or intentional infliction of mental anguish.” If a Tennessee employer hands you its anti-bullying policy, that policy is working for the employer.

The Healthy Workplace Bill has been introduced in 32 states per its sponsors’ tracker (last updated 28 February 2025) and enacted as a general private-sector cause of action in none of them.

How do you prove mobbing at work when there is no mobbing law?

By writing the pattern as pervasive conduct under one heading rather than a list of grievances under many. A grievance list invites the reader to grade each item, and each item loses; a pervasiveness case invites them to count.

As a list of grievances, how most complaints arrive:

I want to raise concerns about how I’ve been treated. Priya has been rude to me several times. I was left off the team offsite. Dan keeps commenting on my accent. I was told my report was “unreadable.” Nobody sits with me at lunch any more. I feel like I’m being pushed out and it’s affecting my mental health.

Every item is individually deniable, trivial and undated. The reader resolves five small questions and answers no to all five.

The same facts, written as pervasive conduct:

Complaint of a hostile work environment based on national origin (R. Adeyemi, 16 August 2026)

Between 6 January and 14 August 2026 (31 weeks), I have been excluded from work I am accountable for, or disparaged in connection with it, on 22 dated occasions by five members of the same team: P. Nair, D. Reyes, J. Okonkwo, S. Bell and M. Duval (manager). Dates and detail are in the attached schedule.

Frequency: at least one incident in 26 of those 31 weeks. Longest gap, 12 days.

Conduct by type: work assigned to me in writing then reassigned verbally in a meeting: 9. Meetings covering my accountabilities held without me: 7. Comments about my accent or how I “phrase things”: 6.

Humiliating character: 11 of the 22 occurred in front of three or more colleagues.

Interference with work performance: 3 missed delivery dates since May, each because a reassignment was not communicated to me. Two are cited in my 4 August performance note.

Comparator: no other member of the team of nine has had an assigned deliverable verbally reassigned in this period. I am the only person on the team not born in the United States.

I ask that this be treated as a complaint of harassment based on national origin under Title VII, investigated as one continuing pattern rather than as separate incidents.

Four changes, each mapping to a finding somebody has to make.

1. One heading, naming a protected characteristic. Without one there is nothing for Title VII to attach to, and the matter falls to HR discretion.
2. A duration, a count and a gap. “31 weeks, 22 occasions, longest gap 12 days” states the pervasiveness limb as arithmetic, which cannot be resolved incident by incident.
3. The Harris factors as subheadings: frequency, humiliating character and interference with work performance.
4. A comparator instead of an accusation. Two observations side by side leave the inference available without your having sworn to it.

The schedule of 22 incidents is a separate document, and building it matters more than the complaint. See how to document workplace mistreatment so it holds up, which explains why handing over the whole log on day one can arm the employer.

How do you tell mobbing from a legitimate performance process?

Does the record run backwards? In a real process the concern is documented first and the exclusion follows; in mobbing the exclusion runs for months and the paperwork appears afterward, dated after you raised something. Line up every note in your file against the dates of your complaints. If you are mostly being left out of meetings and information, see how to keep a record of the meetings you were left out of.

Two related tests live elsewhere: the different-standard test on written warnings and whether the process survives being written down. Where the mobbing followed a complaint you already made, retaliation is often the stronger claim. See how to prove retaliation at work.

What does it do to health?

The best US federal evidence is narrow, and its limits belong with the number. CDC/NIOSH, MMWR 72(44), 3 November 2023, using the General Social Survey Quality of Worklife module, found that among health workers the share reporting harassment at work rose from 6.4% in 2018 to 13.4% in 2022. In the 2022 sample of n=325, those reporting harassment had adjusted odds of burnout of 5.83 (95% CI 2.56–13.27), anxiety 5.01 (2.45–10.26) and depression 3.38 (1.53–7.47).

The limits: health workers only, a broadly worded survey question, and associations rather than direction. It remains the strongest federally collected figure available, and the reason mobbing is a health matter before it is a legal one.

Where does the general rule not apply?

Employers under 15 employees. Title VII does not reach them, and a state threshold can sit lower: N.Y. Exec. Law § 292(5) provides that “the term ’employer’ shall include all employers within the state,” and Cal. Gov. Code § 12926(d) reaches any person “regularly employing five or more persons.” In a small workplace, start with your own state’s definition.

The subjective limb can be lost in your own emails. The environment has to be hostile objectively and to you: “[i]f the victim does not subjectively perceive the environment to be abusive,” Harris holds, “the conduct has not actually altered the conditions of the victim’s employment, and there is no Title VII violation.” A year of replying “no worries, all good!” to conduct you now call abusive has to be explained. Explain it early, not under cross-examination.

California’s training mandate is not a cause of action. Cal. Gov. Code § 12950.1 makes an employer of five or more “include prevention of abusive conduct as a component of” the harassment training it must give supervisors and staff. That is a training duty. Proving the employer trained its managers and then did nothing is context inside a Title VII case, not a route on its own.

What should you do this week?

Count. Mark on a calendar every incident you can date from documentary evidence, such as calendar invites, message timestamps and ticket histories. Record the first date, the total, and the longest gap; those three numbers are what a pervasiveness argument is written from. They do not win one. That turns on all the circumstances, Faragher‘s limit included. They do change how you write it.

The signs of a toxic workplace sets out the wider pattern; what counts as a hostile work environment is the legal test.

Common questions about workplace mobbing

Is mobbing a crime?

No, and this is separate from the civil question the article answers. Mobbing is not a criminal offense in the United States and no prosecutor charges it. Individual acts inside a mobbing campaign can be separately criminal, such as assault, stalking or criminal harassment under state law. The pattern itself is not. What can be actionable is civil, and it runs through a protected characteristic.

What does HR consider a hostile work environment?

Often something narrower than the legal standard, and that mismatch costs people their complaints. In law it requires conduct tied to a protected characteristic, severe or pervasive enough to alter the conditions of employment. HR frequently applies its own policy definition instead. Reporting conduct as “hostile” without naming the protected basis often produces a finding of no policy violation, which is not the same as a finding that nothing unlawful happened.

Sources

• 42 U.S.C. § 2000e-2(a)(1): Title VII unlawful employment practices (Cornell LII)
• 42 U.S.C. § 12112(a): ADA prohibition on disability discrimination (Cornell LII)
• 29 U.S.C. §§ 157, 160(b): NLRA Section 7 rights and the Section 10(b) six-month charge period (Cornell LII)
• Cal. Gov. Code §§ 12926(d), 12950.1: FEHA employer definition and harassment training (FindLaw)
• N.Y. Exec. Law § 292(5): Human Rights Law employer definition (New York State Senate)
• Tenn. Code Ann. § 50-1-504 and 2019 Public Chapter 214: Healthy Workplace Act (Justia; Tennessee Secretary of State)
• Act 90-2020: Puerto Rico workplace harassment statute (Oficina de Gerencia y Presupuesto), with the 2021 private-sector guidelines (Departamento del Trabajo y Recursos Humanos)
• Harris v. Forklift Systems, Inc., 510 U.S. 17 (1993); Faragher v. City of Boca Raton, 524 U.S. 775 (1998)
• Leymann, H. (1990), Mobbing and Psychological Terror at Workplaces, Violence and Victims 5(2): 119–126 (PubMed; US Department of Justice NCJRS abstract)
• Sahin et al. (2012), Croatian Medical Journal 53: 357–366 (PubMed Central)
• CDC/NIOSH, MMWR 72(44), 3 November 2023
• EEOC: harassment guidance and newsroom releases
• NLRB: protected concerted activity
• Healthy Workplace Bill: sponsors’ legislative tracker

This is general information, not legal advice for your situation.