A union vote works like this: a group of workers shows the National Labor Relations Board that at least 30 percent of them want representation, the agency decides who belongs in the voting group, both sides campaign under rules that ban threats and promises, and NLRB agents run a secret-ballot election in which a simple majority of the votes actually cast decides the outcome.1National Labor Relations Board. Conduct Elections Understanding how a union vote works matters because each stage carries its own deadlines and its own ways to go wrong.
Getting an Election Scheduled
Nothing happens until organizers show real support. The standard threshold is 30 percent of the workers in the proposed group. Supporters usually sign authorization cards or a petition asking for union representation. Those signatures go to the NLRB’s regional office, never to the employer, and agency staff check them against payroll records to confirm the count.
The formal filing is NLRB Form 502, called an RC Petition. It names the employer, the worksite, and the workers the union wants to represent. A copy of the petition goes to the employer, but the signed cards themselves stay confidential.2National Labor Relations Board. Steps for Filing a Petition
Clearing 30 percent is necessary, not sufficient. The NLRB also confirms it has jurisdiction over the employer, that the union is a qualified labor organization, and that no existing contract or recent election blocks a new vote. If all of that checks out, the case moves toward an election date.
Who Gets to Vote
Before ballots are printed, the NLRB has to decide which workers are in the bargaining unit. The employer and the union sometimes agree on the group. When they don’t, the agency holds a hearing and makes the call.
The core test is whether the proposed group shares a “community of interest.” The NLRB looks at wages, benefits, schedules, job duties, supervision, physical location, and whether people transfer between the positions. Workers with sharply different working conditions may be excluded or placed in a separate unit.
Supervisors are never in the unit. The law defines a supervisor as someone with authority to hire, fire, promote, transfer, suspend, discipline, or direct other employees using independent judgment, not just routine task assignment.3Office of the Law Revision Counsel. 29 USC 152 – Definitions Getting this classification wrong can taint the whole election, so it’s often fought over hard.
Once the unit is set, the employer must give the union a voter eligibility list with names, home addresses, and any personal email addresses and phone numbers on file, so the union can reach voters directly.4National Labor Relations Board. NLRB Representation Case-Procedures Fact Sheet A late or incomplete list is itself grounds to set an election aside.
The Campaign and What Crosses the Line
Between the petition and the vote, both sides campaign, and this is where most legal disputes start.
Employers have a free-speech right under the NLRA. They can share opinions about unionization, argue against it, and lay out facts about consequences, so long as they don’t threaten retaliation or promise benefits to influence the vote.5Office of the Law Revision Counsel. 29 U.S. Code 158 – Unfair Labor Practices “I think a union would be bad for this company” is protected opinion. “If the union wins, I’ll shut down this location” is a threat and violates the law.
Specific rules tighten as election day nears. Neither side may give an election speech on company time to a gathered group of employees within 24 hours of the vote.6National Labor Relations Board. Election-Related Content Employers cannot use forged documents, keep lists of who has already voted, hold prolonged conversations with employees waiting to vote, or alter NLRB documents to imply the agency favors an outcome.
How the Ballot Is Actually Run
The vote is a secret ballot conducted entirely by NLRB agents. On the scheduled date, agents set up private voting booths and sealed ballot boxes, usually at the workplace. Workers get a standard paper ballot, mark it in private, and drop it in the locked box. Both the employer and the union may appoint observers to help identify eligible voters, but observers cannot campaign or talk with employees about how to vote.
For remote worksites, scattered shifts, or health concerns, the NLRB can authorize mail-in ballots instead. Workers get materials at home and return sealed envelopes to the regional office within a set window. Either way, NLRB agents keep custody of every ballot until counting starts. Management and the union never handle the ballots.
What Counts as Winning
A union wins by getting a simple majority of the votes actually cast, not a majority of the whole eligible workforce.1National Labor Relations Board. Conduct Elections If 100 workers are eligible and 60 vote, 31 votes carries it. Turnout can matter more than persuasion.
When more than two choices appear on the ballot, for example two competing unions and a “no union” option, and none gets a majority, the NLRB holds a run-off between the top two.7Office of the Law Revision Counsel. 29 USC 159 – Representatives and Elections
A union win produces a Certification of Representative from the NLRB, making the union the exclusive bargaining agent for everyone in the unit, whether they voted for it or not. A union loss produces a certification of results, and federal law bars any new election in that bargaining unit for 12 months.7Office of the Law Revision Counsel. 29 USC 159 – Representatives and Elections
Objecting to the Result
Either side has five business days after the ballot count to file objections with the regional director.8eCFR. 29 CFR 102.69 – Election Procedure The objection needs a written explanation and an offer of proof. Vague complaints get rejected. Common grounds include employer threats, material union misrepresentations, or procedural errors by NLRB agents.
The bar is lower than an unfair labor practice case. The NLRB can set aside an election if the conduct could have affected the outcome, and orders a new vote when it agrees. If the objections are rejected, the original certification stands.
Life After the Vote
Winning is only the start. Once a union is certified, the employer is legally required to bargain in good faith over wages, hours, benefits, safety, and other core terms.9National Labor Relations Board. Employer/Union Rights and Obligations Good faith means meeting at reasonable times and genuinely trying to reach agreement. It does not require either side to accept any specific proposal.
There is no legal deadline for a first contract, and this is where a lot of newly organized workplaces stall. Negotiations can run months or years. During that time, the employer generally cannot make unilateral changes to working conditions without bargaining over them first. Either side can file an unfair labor practice charge if it believes the other isn’t bargaining in good faith. Workers keep the right to strike, though the financial and tactical risks are real for a new unit.
If the union loses, no new election can be held in that unit for a full year. Organizing can continue, but the ballot cannot.
Removing a Union Later
Workers who no longer want representation can petition for a decertification election. The mechanics mirror the original: employees, not the employer, gather signatures from at least 30 percent of the unit and file an RD Petition with the NLRB. Employer involvement in circulating the petition can produce unfair labor practice charges and invalidate the whole effort.
Timing is restricted. A decertification petition cannot be filed within the first 12 months after a union’s certification.10National Labor Relations Board. Decertification Election The NLRB also generally will not hold an election while a valid collective bargaining agreement is in effect, for up to three years. The exception is a narrow window, typically 90 to 60 days before the contract expires, when a petition can be filed.11National Labor Relations Board. National Labor Relations Board Retains Longstanding Contract-Bar Doctrine Miss it and the next chance is one contract cycle away.
Workers the Process Does Not Cover
Not everyone has the right to a union vote under this system. Agricultural workers, domestic workers, independent contractors, and anyone employed by a parent or spouse are outside the NLRA. Supervisors are excluded by definition and cannot vote or be part of the unit. Public-sector employees are covered by separate federal or state labor statutes, not by the NLRA.3Office of the Law Revision Counsel. 29 USC 152 – Definitions Airline and railroad workers vote under the Railway Labor Act, administered by the National Mediation Board, on a different set of rules. Everyone else in the private sector goes through the NLRB process described above.