The Taft-Hartley Act of 1947 restricted labor rights by rewriting the National Labor Relations Act to place binding legal duties on unions for the first time. It gave workers a federally protected right to refuse union activity, banned the closed shop, outlawed secondary boycotts and several other strike tactics, created a list of union unfair labor practices, allowed states to pass right-to-work laws, gave the president authority to delay strikes that threatened national health or safety, and required unions to file financial reports and stay out of federal election spending from their treasuries.
The Wagner Act of 1935 had protected the right to organize and bargain collectively while placing legal obligations almost entirely on employers. Taft-Hartley kept that framework and layered a matching set of constraints on the union side. Labor leaders called it a “slave labor law.” Congress passed it over President Truman’s veto, and its core provisions still govern private-sector labor relations today.1National Labor Relations Board. 1947 Taft-Hartley Substantive Provisions
The Right to Refrain From Union Activity
The single most important change was a clause added to Section 7. The Wagner Act guaranteed employees the right to organize, form unions, and bargain collectively. Taft-Hartley kept that language and added that employees “shall also have the right to refrain from any or all of such activities.”2Office of the Law Revision Counsel. 29 USC 157 – Rights of Employees
For the first time, federal law protected a worker’s choice not to join a union, not to support an organizing campaign, and not to participate in collective action. Every other union-side restriction in the act flows from this principle. If workers have a federally protected right to stay out, unions cannot use coercion or mandatory membership to override that choice.
Closed Shops Banned, Union Shops Limited
Before 1947, many industries operated under closed-shop agreements. Employers could hire only workers who already belonged to the union. Taft-Hartley made that arrangement illegal.
Employers can still agree to a union-shop clause requiring new hires to join, but workers have at least thirty days on the job before the obligation takes effect.3Office of the Law Revision Counsel. 29 USC 158 – Unfair Labor Practices Even then, the only membership failure that can cost a worker the job is nonpayment of standard dues and initiation fees. A union cannot get someone fired for skipping meetings, refusing to vote in internal elections, or declining to take part in union governance.
Industries with high worker turnover between employers, like construction and maritime shipping, adapted through union hiring halls. These referral systems remain legal, but the NLRB requires them to operate on a nondiscriminatory basis. A hall cannot favor union members over nonmembers in job referrals, must explain how its referral system works, and can charge nonmembers only a reasonable fee for using its services.4National Labor Relations Board. Hiring Halls
Section 14(b) and State Right-to-Work Laws
Taft-Hartley went further than banning the closed shop at the federal level. Section 14(b) allows states to prohibit even union-shop agreements within their borders. The statute says nothing in federal labor law authorizes agreements requiring union membership as a condition of employment in any state whose own law forbids them.5Office of the Law Revision Counsel. 29 U.S. Code 164 – Construction of Provisions
Twenty-six states now have right-to-work laws, covering large portions of the South, Midwest, and Mountain West. In those states, unions cannot require dues payment as a condition of employment. Workers who benefit from a collectively bargained contract can decline to contribute to the cost of negotiating and administering it, which typically means lower union revenue and smaller organizing budgets than in states that still allow union-shop clauses.
Strikes and Boycotts the Act Outlawed
The Wagner Act placed no meaningful limits on strike tactics. Taft-Hartley outlawed several categories under Section 8(b)(4).
Secondary boycotts are prohibited. A union with a dispute against one employer cannot pressure a neutral third party — a supplier, customer, or distributor — to stop doing business with that employer. The labor dispute has to stay between the parties who actually have a disagreement.3Office of the Law Revision Counsel. 29 USC 158 – Unfair Labor Practices
Jurisdictional strikes are also barred. When two unions fight over which one’s members should perform certain work, neither can strike to force the employer’s hand. The NLRB resolves those disputes administratively. Recognition strikes are barred as well: a union cannot strike to force an employer to recognize it as bargaining representative. Recognition comes through NLRB-supervised elections, not economic pressure.
The law preserves primary strikes and primary picketing. A union can still strike against the employer it has a direct dispute with, and it can truthfully publicize the grievance to consumers, as long as the publicity does not induce employees of neutral employers to refuse to handle goods.
Employers who suffer losses from illegal boycotts or jurisdictional strikes have a separate remedy under Section 303. They can sue in federal court and recover compensatory damages for the business harm caused by the unlawful action, plus the cost of the suit.6Office of the Law Revision Counsel. 29 U.S. Code 187 – Unlawful Activities or Conduct; Right to Sue This private right of action runs independently of any unfair labor practice case at the NLRB.
Unfair Labor Practices Applied to Unions
The Wagner Act listed unfair labor practices only for employers. Taft-Hartley created a parallel set for unions, and this is where much of the act’s restrictive power sits.
Section 8(b)(1) makes it an unfair labor practice for a union to coerce or restrain employees exercising their Section 7 rights, including the right to refrain. Threats, physical intimidation, and retaliation against workers who decline to support an organizing effort all violate this provision.3Office of the Law Revision Counsel. 29 USC 158 – Unfair Labor Practices
Section 8(b)(2) prohibits unions from pressuring an employer to fire or discipline a worker for reasons other than nonpayment of dues in a valid union-shop arrangement. Before this rule, unions could effectively blacklist workers who fell out of favor with leadership by pushing the employer to terminate them.
Section 8(b)(3) imposed on unions the same duty to bargain in good faith that the Wagner Act had placed only on employers. Unions must meet at reasonable times and make genuine efforts to reach agreement. Simply stonewalling or refusing to negotiate is not allowed.
Section 8(b)(6) targeted featherbedding, the practice of demanding pay for work not actually performed. Courts have read the provision narrowly, requiring proof that the services in question were genuinely not performed rather than simply inefficient. Even so, it signaled Congress’s intent to curb union demands unconnected to productive work.
Alongside these statutory duties, courts have developed the duty of fair representation. A union must represent all bargaining-unit employees — members and nonmembers alike — without acting arbitrarily, discriminatorily, or in bad faith. Ignoring a worker’s grievance for personal reasons, or refusing to process complaints from workers of a particular race or gender, breaches this duty.
Presidential Power to Delay National Emergency Strikes
Sections 206 through 210 give the president a tool to delay any strike or lockout that threatens the national health or safety. The process starts when the president appoints a board of inquiry to investigate and report.7Office of the Law Revision Counsel. 29 U.S. Code 176 – National Emergencies; Appointment of Board of Inquiry Based on that report, the president can direct the Attorney General to seek a federal court injunction halting the strike.8Office of the Law Revision Counsel. 29 USC 178 – Injunctions During National Emergency
Once the injunction issues, an 80-day sequence begins. Workers stay on the job and both sides continue bargaining. After 60 days, the board reconvenes and reports on the state of negotiations, including each party’s position and the employer’s last offer. The NLRB then has 15 days to conduct a secret ballot on whether workers will accept that final offer.9Office of the Law Revision Counsel. 29 USC 179 – Injunctions During National Emergency; Strike Ballot If workers reject the offer, the injunction dissolves and the union can resume its strike. The president then submits a full report to Congress.
The mechanism does not prevent strikes permanently. It delays them. But 80 days drains the momentum of a planned walkout and exposes the union’s position to sustained public and political pressure. Presidents have used this authority in longshore, steel, and coal disputes.
Financial Reporting and Political Spending Restrictions
Taft-Hartley imposed transparency requirements on unions that had no Wagner Act equivalent. Unions had to file financial reports and disclose internal operations as a precondition for accessing NLRB services. Section 304 extended the existing ban on corporate political contributions to cover union treasuries, prohibiting labor organizations from spending general funds on federal election campaigns.
One administrative requirement stood out. Union officers had to sign non-communist affidavits stating they were not members of the Communist Party before their unions could file petitions, participate in NLRB elections, or receive other board services. The Landrum-Griffin Act of 1959 repealed that requirement.10National Labor Relations Board. 1959 Landrum-Griffin Act
Landrum-Griffin also replaced Taft-Hartley’s original financial reporting provisions with the system in force today. Unions file annual reports on Form LM-2, LM-3, or LM-4 depending on their size, within 90 days after fiscal year end. The Department of Labor grants no extensions.11U.S. Department of Labor. OLMS Filing Due Date Reports disclose officer salaries, total assets, receipts, and a detailed breakdown of spending. Officers who willfully fail to file, or knowingly make false statements, face up to $100,000 in fines, up to one year in prison, or both. Unions must keep supporting records for at least five years.
Employers have parallel obligations. Any employer who makes payments or provides items of value to union officials must disclose those transactions on Form LM-10, also within 90 days of fiscal year end.12U.S. Department of Labor. Employer and Consultant Reporting
How Later Law Extended the Restrictions
Two Supreme Court decisions built on the Taft-Hartley framework to further limit what unions can collect from workers who are not full members.
In Communications Workers of America v. Beck (1988), the Court held that Section 8(a)(3) does not permit a union to spend nonmember dues on activities unrelated to collective bargaining. Unions can charge nonmembers only for the costs of negotiating contracts, administering grievances, and other representational activities, not for political lobbying, organizing at other workplaces, or community programs.13Justia Law. Communications Workers of America v. Beck, 487 U.S. 735 (1988) Objecting workers can request a reduced fee.
In Janus v. AFSCME (2018), the Court went further for public-sector employees. Requiring nonconsenting government workers to pay any fees to a public-sector union violates the First Amendment. After Janus, no payment can be deducted from a public-sector employee’s wages for union purposes unless the employee affirmatively consents.14Justia Law. Janus v. AFSCME, 585 U.S. (2018) The decision made every public-sector workplace in the country a right-to-work environment, regardless of state law.
Together, Taft-Hartley, Landrum-Griffin, and the cases interpreting them define the legal boundaries within which American unions operate. Taft-Hartley set the core of that framework: workers may refuse to unionize, unions face the same kinds of legal duties as employers, some strike weapons are simply off the table, and the federal government can pause a walkout that puts the country at risk.