A labor union is an organization of workers that negotiates with an employer over wages, hours, benefits, and working conditions. Instead of each worker bargaining alone, the union speaks for the group. That collective voice is the defining feature, and it is also what gives unions their legal significance.

What Unions Do

Unions perform several core functions:

  • Collective bargaining. The union negotiates a contract, called a collective bargaining agreement, that sets pay scales, schedules, leave, safety rules, and grievance procedures.
  • Representation. The union represents members in disputes with management, including discipline and termination.
  • Political and legislative activity. Unions advocate for laws and policies that affect workers, subject to rules on how dues may be used.
  • Benefits and training. Many unions run apprenticeship programs, training funds, and benefit plans.

The Legal Framework

The main federal statute is the National Labor Relations Act, found at 29 U.S.C. section 151 and following. It protects the right of employees to organize, to bargain collectively, and to engage in other concerted activity for mutual aid or protection. Section 7 of the Act sets out those rights. Section 8 defines unfair labor practices by employers and by unions. The Act was amended over time, including by the Taft-Hartley Act and the Landrum-Griffin Act, which added rules on union internal affairs and member rights.

The National Labor Relations Board, at nlrb.gov, administers the Act. It conducts secret-ballot representation elections, decides which jobs belong in a bargaining unit, and investigates and prosecutes unfair labor practice charges. The Board does not set wages or write contracts; it referees the process. Federal courts of appeals review the Board's decisions.

How a Union Forms

Most private-sector organizing follows a recognizable path:

  1. Interest and cards. Workers sign authorization cards or petitions showing support.
  2. Petition. If enough support is shown, a petition is filed with the NLRB seeking an election.
  3. Election. The NLRB holds a secret-ballot election, and a majority of those voting decides.
  4. Certification. If the union wins, the Board certifies it as the exclusive representative of the bargaining unit.
  5. Bargaining. The employer and union must meet and bargain in good faith over mandatory subjects such as wages, hours, and working conditions.

An employer may voluntarily recognize a union based on signed cards in some circumstances, but contested cases go to an election. The employer must not interfere with, restrain, or coerce employees in the exercise of their rights.

Collective Bargaining and the Contract

The result of bargaining is a written agreement that usually runs for a fixed term. It typically covers pay, overtime, scheduling, seniority, health and safety, leave, and a grievance and arbitration procedure. When a dispute arises over the meaning of the contract, the grievance process usually ends in binding arbitration rather than court. That private dispute system is one of the practical differences between union and non-union workplaces.

Union Security and Right-to-Work

A union security clause addresses whether workers must join or pay dues. The closed shop, which required employers to hire only union members, is prohibited under federal law. Other arrangements include the union shop, where workers must join after hire, and the agency shop, where non-members pay a fee for representation. In states with right-to-work laws, workers cannot be required to join a union or pay dues as a condition of employment. The list of right-to-work states has changed over time, so check the current law in your state.

Public Sector and Other Workers

Coverage is not uniform. Employees of the federal government are covered by a separate statute, and their labor relations are administered by the Federal Labor Relations Authority. State and local public employees are governed mainly by state law, and many states have their own public employment relations boards. Railroad and airline workers fall under the Railway Labor Act. Agricultural workers, domestic workers, and independent contractors are treated differently, and some are excluded from the NLRA entirely. That is why a question about union rights starts with the question of who the worker is and who the employer is.

Member Rights

Federal law also protects union members from certain abuses by their own union. The Landrum-Griffin Act, also known as the Labor-Management Reporting and Disclosure Act, guarantees rights such as secret-ballot voting on dues increases, access to union financial reports, and freedom of speech and assembly at union meetings. Unions must file annual financial reports with the U.S. Department of Labor, at dol.gov.

A Balanced View

Supporters argue that unions raise wages, improve safety, and give workers a voice that a single employee lacks. Critics argue that union rules can reduce flexibility, that dues impose a cost, and that seniority systems may not reward individual performance. These are policy debates, and reasonable people differ. What is not in dispute is that unions occupy a defined place in federal and state law, with rights and obligations on both the employer and the union side.

The Duty of Fair Representation

A union certified as the exclusive representative must represent all employees in the bargaining unit fairly, including workers who are not members. This duty of fair representation requires the union to act in good faith and without discrimination or arbitrary conduct when it handles grievances and negotiates. A worker who believes the union failed in that duty can file a charge with the NLRB or, in some cases, sue in court, though the standard is demanding and not every unfavorable outcome is a violation.

Decertification and Changing Representation

Representation is not permanent. Employees can petition the NLRB to hold a decertification election to remove a union, or to choose a different union, subject to timing rules and showing-of-interest requirements. An employer generally cannot withdraw recognition on its own while a valid collective bargaining agreement is in force. These procedures exist so that the bargaining unit can change its mind without interference from either the employer or the incumbent union.

What Employers May and May Not Do

Federal law draws a line between lawful employer communication and unlawful interference. An employer may express views about unionization as long as the statements do not contain threats of reprisal, promises of benefit, or surveillance of employees. An employer may not fire, demote, or discipline an employee for supporting a union, and may not interrogate workers about their union sympathies in a coercive way. When an employer crosses that line, the union or a worker can file an unfair labor practice charge with the NLRB, which can order remedies including reinstatement and back pay.

This guide is general information only and is not legal advice. Labor law depends on the worker, the employer, and the state, so consult a licensed attorney or the NLRB for guidance on a specific situation.