Collective Bargaining Definition: Statute, Subjects, and Good Faith

Collective bargaining is the legal process by which an employer and a union chosen by a group of employees negotiate over wages, hours, and other terms and conditions of employment, with any deal reduced to a written contract. Federal law frames the collective bargaining definition as a mutual obligation: both sides must meet at reasonable times and confer in good faith, but neither is required to agree to any proposal or make a concession.¹ The union speaks for every worker in the group it represents, and the resulting agreement governs day-to-day working life at that workplace.

What the Statute Actually Says

The definition comes from the National Labor Relations Act, which occupies sections 151 through 169 of Title 29 of the U.S. Code. Congress declared it national policy to encourage collective bargaining and to protect workers’ freedom to organize and choose their own representatives.² Employees have the right to form or join unions, bargain collectively through representatives of their own choosing, and engage in other concerted activity for mutual protection. They have an equal right to refrain from any of that.³

Two features of the statutory definition matter more than any other. First, the obligation is mutual: it applies to the employer and to the union with equal force, and refusal by either side to bargain in good faith is an unfair labor practice.⁴ Second, the duty is a duty to negotiate, not a duty to agree. The law expressly says neither side has to accept a proposal or make a concession. So collective bargaining, legally speaking, is a process obligation, not an outcome guarantee.

When the process breaks down through misconduct, the National Labor Relations Board can investigate, issue cease-and-desist orders, and require remedies including reinstatement of employees with back pay. It cannot order reinstatement or back pay for an employee fired for cause.⁵

Who Bargains for Whom

Collective bargaining consolidates many individual employee voices into a single representative. Once a union is certified after a secret-ballot election supervised by the NLRB, it becomes the exclusive bargaining representative of everyone in the defined bargaining unit.⁶ “Exclusive” is a term of art with real bite: on wages, hours, and working conditions, the union speaks for every employee inside the unit, including those who did not vote for the union and those who never joined it.

The NLRB defines the bargaining unit itself, deciding whether the appropriate group is organized by employer, craft, plant, or a subdivision of those categories, based on shared duties, common supervision, and overlapping conditions.⁶ The unit’s boundaries determine the contract’s reach.

A Different Framework for Federal Workers

The definition above governs private-sector work. Federal employees bargain under a separate law, the Federal Service Labor-Management Relations Statute, which recognizes the right to organize and negotiate but carves out broad management prerogatives that cannot be traded away at the table.⁷ Agency leaders retain sole authority over the agency’s mission, budget, and organization, and over decisions to hire, fire, assign work, and contract out.⁸ Federal bargaining therefore centers on workplace procedures and evaluation methods rather than the broad economic terms typical in the private sector.

What Can Be Bargained Over

The statutory phrase “wages, hours, and other terms and conditions of employment” does more than describe collective bargaining. It sorts every possible topic into one of three categories, and the category controls what each side can do about it.

Mandatory Subjects

Any topic that falls within wages, hours, and working conditions is mandatory.¹ If one side raises it, the other must come to the table and discuss it. Wage rates, overtime pay, health insurance, retirement contributions, shift scheduling, and workplace safety rules are typical examples. Because these subjects sit at the core of the bargaining duty, either side can bring economic pressure to bear over them: the union can strike, and the employer can lock out workers, once negotiations reach a genuine deadlock.

Permissive Subjects

Topics outside that core are permissive. Either side may raise them, but the other side can decline to discuss them without violating the law. Neither party can condition the whole agreement on a permissive subject, and neither can strike or lock out to force its acceptance. Internal union procedures, the makeup of the bargaining unit itself, and benefits for retirees who are no longer in the unit fall into this category.

Illegal Subjects

Some provisions cannot appear in any collective bargaining agreement at all. The classic example is the closed shop, an arrangement that would require someone to already belong to the union before being hired. The Taft-Hartley amendments made bargaining for a closed shop an unfair labor practice for both employers and unions.¹ Terms that would violate federal anti-discrimination law are likewise off-limits. Including one voids that portion of the contract and exposes both sides to legal challenge.

What “Good Faith” Means

Because the law measures bargaining by process rather than outcome, the good faith requirement is where the definition does most of its work. In practice, good faith means meeting at reasonable times, exchanging proposals, providing relevant information when the other side requests it, genuinely considering what the other side puts forward, and responding with counterproposals instead of stonewalling.⁴

The NLRB evaluates good faith by looking at the totality of a party’s conduct rather than any single act. Surface bargaining, where a party goes through the motions of meeting with no real intention of reaching a deal, is itself an unfair labor practice. Refusing all concessions, running out the clock with delays, or presenting a take-it-or-leave-it final offer while refusing to discuss alternatives can each point toward bad faith when they add up.

The Written Agreement

When bargaining succeeds, the product is a collective bargaining agreement: a legally enforceable written contract between the union and the employer.⁹ The statute requires that any agreement be put in writing if either side asks.¹ Contracts typically run three to five years and bind every worker in the bargaining unit, whether or not they belong to the union. During the life of the contract, neither side can unilaterally change the terms it sets.

Nearly every such agreement includes a grievance procedure for handling disputes over what the contract means. The usual structure starts with an informal conversation between the employee (or a union steward) and the supervisor, escalates to a formal written grievance with documented timelines, and ends, if the parties cannot resolve the matter themselves, in binding arbitration before a neutral third party whose decision both sides must accept.

What the Definition Does Not Reach

Two boundaries are worth naming because the definition can be read too broadly without them.

The duty to bargain does not, by itself, mean employees have to pay for union representation. In states without right-to-work laws, a collective bargaining agreement can include a union security clause requiring employees to join or pay dues within 30 days of hire.¹ Roughly 26 states as of 2026 prohibit those clauses, so employees there can be covered by a bargained contract without paying the union anything. For public-sector workers everywhere in the country, the Supreme Court held in Janus v. AFSCME that mandatory fees to a union the employee has not chosen to join violate the First Amendment.¹⁰

The duty to bargain also does not override every employer decision. In the private sector, a management rights clause negotiated into the contract can reserve specified decisions, such as directing employees, setting performance standards, and choosing disciplinary procedures, for the employer alone; the NLRB and the courts ask whether the clause specifically and unmistakably covers the topic before allowing unilateral action there. In federal employment, management rights are set by statute rather than by negotiation and cannot be bargained away.⁸

1
Office of the Law Revision Counsel. 29 USC 158 – Unfair Labor Practices
2
Office of the Law Revision Counsel. 29 USC 151 – Findings and Declaration of Policy
3
Office of the Law Revision Counsel. 29 U.S. Code Chapter 7 Subchapter II – National Labor Relations
4
National Labor Relations Board. Collective Bargaining (Section 8(d) and 8(b)(3))
5
Office of the Law Revision Counsel. 29 USC 160 – Prevention of Unfair Labor Practices
6
Office of the Law Revision Counsel. 29 U.S. Code 159 – Representatives and Elections
7
Federal Labor Relations Authority. The Federal Service Labor-Management Relations Statute
8
Office of the Law Revision Counsel. 5 USC 7106 – Management Rights
9
U.S. Department of Labor. What Is a Union
10
Justia U.S. Supreme Court. Janus v. AFSCME, 585 U.S. (2018)