Right-to-Work Laws in Missouri: What They Mean for Workers

The federal foundation for right-to-work laws is Section 14(b) of the National Labor Relations Act (NLRA), 29 U.S.C. § 164(b), which permits individual states to prohibit union security agreements that require employees to pay dues or fees to unions as a condition of employment.

Federally, the NLRA (enforced by the National Labor Relations Board, NLRB) protects employees' rights to organize and bargain collectively, but Section 14(b) explicitly authorizes states to restrict union security arrangements. Without Section 14(b), the NLRA would preempt state right-to-work laws. Under federal law, an employee's refusal to pay union dues cannot be grounds for termination where a state right-to-work law is in effect. The NLRB enforces both union rights to organize and employees' rights to refrain from union activity under 29 U.S.C. § 157. Remedies for federal NLRA violations include reinstatement, back pay, and attorney's fees. Employers covered by the NLRA (generally those with at least 2 employees engaged in interstate commerce) are subject to these federal constraints, even in right-to-work states.

Missouri Statute § 105.500 et seq. establishes Missouri as a right-to-work state with protections that equal or exceed the federal baseline.

Missouri's right-to-work law is actually stronger in several respects than the minimum required by the NLRA's Section 14(b). Under § 105.500, no person can be denied employment or discriminated against because of union membership or non-membership. Critically, Missouri law protects the individual employee's choice to refrain from union activity—employees cannot be required to join a union, pay union dues, agency fees, or any other financial obligation to a union as a condition of employment, apprenticeship, or continuation of employment.

Missouri Statute § 105.510 provides specific protections: any person who attempts to coerce, intimidate, threaten, or punish another person for exercising right-to-work rights commits an unlawful act. This applies equally to unions, employers, and individuals. The statute explicitly covers union representatives and organizational agents, making it clear that union coercion—not just employer coercion—is prohibited.

Geographic and employer scope: Missouri's right-to-work protection applies to all private sector employees in Missouri and to most public sector employees. Unlike the NLRA (which applies only to employers with sufficient interstate commerce impact), Missouri law applies regardless of employer size or industry classification. Public sector coverage is broad but has limited exceptions for certain classified civil service positions under specific Missouri statutes.

Unique state protections: Missouri law goes beyond federal requirements by explicitly criminalizing union coercion and creating state enforcement mechanisms separate from the NLRB. Employees can bring private civil actions under § 105.500, and the Missouri Attorney General also has enforcement authority. Damages are available for violations, including compensatory damages and attorney's fees.

Missouri's right-to-work law contains very few exceptions, but important nuances exist.

First, the law applies only to union security agreements that condition employment on union membership, dues, or fees. It does not prohibit unions and employers from negotiating other terms such as union shop provisions regarding union status (though these cannot be enforced to terminate an employee who refuses to join). The practical effect is that union security clauses are unenforceable in Missouri even if included in a collective bargaining agreement.

Second, certain federal law carve-outs exist: Railway Labor Act employees (railroad and airline workers) and employees in the construction industry covered by special NLRA provisions may be subject to different rules, though Missouri law still applies as a state floor. These federal exceptions are narrow.

Third, union hiring halls and union apprenticeship programs: Missouri law does not prevent unions from operating exclusive hiring halls or apprenticeships, but they cannot discriminate based on union membership status or require membership as a precondition. Non-union workers must have equal access to union-operated apprenticeship programs.

Fourth, public sector considerations: Some classified state and local government positions may have different rules under specific state civil service statutes, though Missouri's general right-to-work protections still apply. However, public sector collective bargaining is limited in Missouri, reducing the practical impact.

Employer defenses are minimal—employers cannot defend a termination or denial of employment by claiming union security was violated, because union security is unlawful in Missouri. However, employers can legally make hiring decisions based on non-union status if this reflects a legitimate business preference (such as preferring non-union contractors to reduce administrative complexity), provided the decision does not constitute unlawful retaliation against union activity itself.

At-will employment remains the default rule in Missouri; right-to-work does not create any implied employment contract. Employees can still be terminated for any reason not prohibited by law (union status, protected activity, etc.).

Step 1 – Document the violation.

Immediately document any incident where you are required to pay union dues, threatened with termination for refusing to join a union, or discriminated against based on your union membership status or refusal to join. Keep detailed records including: dates and times of conversations, names of union representatives or employers involved, specific statements made, any written communications (emails, letters, notices), witnesses present, and the impact on your employment (wage deductions, termination notice, denial of promotion, etc.). Preserve all written materials including pay stubs showing union deduction, collective bargaining agreements, union authorization cards, and any disciplinary notices. Take screenshots of electronic communications and request copies of your personnel file.

Step 2 – Pursue the internal complaint process.

If the violation involves your employer, file a written complaint with your employer's human resources department or management, preferably in writing (email with read receipt or certified mail). Describe the violation, the date it occurred, and the harm caused. Request a written response. If the violation involves a union, you may contact the union's grievance procedure, though unions are unlikely to remedy anti-coercion violations. Document the employer's or union's response and any failure to remedy the situation. This step creates a paper trail and may prompt correction, though it is not strictly required before filing external charges.

Step 3 – File with the appropriate agency.

You have two options: file with the Missouri Attorney General's office or file an NLRB charge if your employer is covered by federal law. For Missouri state enforcement: Contact the Missouri Attorney General's Employment Law division. Address: Missouri Attorney General, P.O. Box 899, Jefferson City, MO 65102. Phone: (573) 751-3321. Website: ago.mo.gov. There is no specific deadline codified in § 105.500, but it is advisable to file within one year of the violation to avoid statute of limitations issues under Missouri's four-year civil action rule. Provide your name, contact information, employer or union name, detailed description of the violation, dates, witnesses, and copies of any documentation.

For federal enforcement (if your employer has 2+ employees in interstate commerce): File an NLRB unfair labor practice charge. Address: National Labor Relations Board, Kansas City Regional Office, 2300 Main Street, Suite 800, Kansas City, MO 64108. Phone: (816) 374-6557. Website: nlrb.gov. Deadline: 180 days from the violation. Submit Form NLRB-501 available at nlrb.gov with your name, employer details, description of the unlawful conduct, date, witnesses, and documents.

Step 4 – Understand the investigation process.

For Missouri AG complaints: The Attorney General's office will review your complaint for legal sufficiency. If accepted, staff will investigate by contacting the employer or union, requesting documents, and conducting interviews. Timeline typically ranges from 60-90 days for initial assessment. If the AG determines a violation occurred, they may pursue civil action, seek injunctive relief, or refer for criminal prosecution under § 105.510 (which is a Class C felony for knowing coercion). You may be contacted for additional information or to testify.

For NLRB charges: An NLRB investigator will be assigned. They will typically contact the employer or union within 2-3 weeks and interview you. Investigation generally takes 30-60 days. If the NLRB concludes a violation occurred, the Regional Director will issue a complaint and seek settlement. If settlement fails, the matter proceeds to a hearing before an Administrative Law Judge (ALJ), which typically occurs within 4-6 months. The ALJ's decision can be appealed to the NLRB in Washington. If you win, remedies include back pay, reinstatement, cessation of unlawful conduct, and attorney's fees.

Step 5 – When to consult an attorney.

Consult an employment lawyer immediately if: you have been terminated or face imminent termination; the violation involves significant wage deductions or financial harm; the union or employer has engaged in intimidation or threats; or you wish to pursue a private civil action for damages under § 105.500. An employment law attorney experienced in labor law can evaluate your case, represent you before the AG or NLRB, and pursue damages for emotional distress, lost wages, and punitive damages. Many labor attorneys offer free initial consultations. Contact the Missouri Bar Association Lawyer Referral Service at (800) 392-8260 for referrals to employment law specialists.