Colorado is a modified right-to-work state. The default rule is that you cannot be required to join a union or pay dues as a condition of keeping your job, but Colorado law allows that default to be overridden if a workplace clears an unusually high bar: a secret-ballot vote in which the “yes” side wins either three-quarters of the ballots cast or a majority of every eligible employee, whichever number is larger.1Justia. Colorado Code 8-3-108 – What Are Unfair Labor Practices Because that threshold is hard to meet, most unionized workplaces in Colorado operate under right-to-work rules in practice, even though the state has never passed a full right-to-work statute.
The Default Rule in Colorado Workplaces
The Colorado Labor Peace Act, at C.R.S. § 8-3-101, governs private-sector labor relations for workers who fall outside federal jurisdiction.2Justia. Colorado Code 8-3-101 – Short Title It starts from a right-to-work baseline. An employer cannot condition your job on joining a union or paying union dues or fees. If your workplace has a union, that union still represents everyone in the bargaining unit, but you personally can decline to become a member and refuse to pay anything to the union.
That baseline holds unless and until the workplace adopts what Colorado calls an “all-union agreement.” Without such an agreement, the right-to-work default stays in place. This is why Colorado often looks and feels like a right-to-work state from the worker’s side: most Colorado employees who work alongside a union are not required to join it or pay for it.
What an All-Union Agreement Takes
Colorado departs from a strict right-to-work state by leaving a door open. An employer and a union can enter into an all-union agreement, requiring union membership as a condition of employment, if the workers approve it by secret ballot under the supervision of the state Division of Labor Standards and Statistics. Approval requires the “yes” votes to clear whichever bar is higher: a majority of every eligible employee in the bargaining unit, or three-quarters of those who actually cast a ballot.1Justia. Colorado Code 8-3-108 – What Are Unfair Labor Practices
The math matters. In a workplace of 100 eligible employees where 60 people vote, “yes” needs at least 51 votes, because 51 is a majority of all eligible workers. If 80 people vote, “yes” needs at least 60, because 60 is three-quarters of the ballots cast. Low turnout does not lower the threshold; it raises it. Any all-union agreement entered without clearing this bar is itself an unfair labor practice.
The process starts with a Petition for Election filed with the Division. An employee, a union, or an employer can file it, and the petition can either request a standalone all-union vote or combine the all-union question with a vote establishing the bargaining unit itself.3Colorado Department of Labor and Employment. Labor Peace Act Petition for Election Form The petition asks for detailed workplace information: job titles included and excluded from the unit, the approximate number of eligible employees, the locations involved, and any prior NLRB certification. Once accepted, the Division runs the secret-ballot election.
Which Workers This Actually Applies To
Here is the piece that trips up a lot of Colorado workers trying to figure out their own situation. The Labor Peace Act does not cover most private-sector employees. The federal National Labor Relations Act preempts state law for the majority of private employers, so union elections, bargaining, and disputes for those workers run through the National Labor Relations Board under federal rules.
The Labor Peace Act fills in where federal law leaves off. Under the Act, an “employer” is a business that regularly employs eight or more people, and the Act excludes independent contractors, domestic workers in private homes, farm and ranch laborers, and anyone covered by the federal Railway Labor Act.4Colorado Department of Labor and Employment. Colorado Code 8-3-101 – Labor Peace Act In practice, that leaves agricultural processing workers, some small employers, and other categories that fall through gaps in federal jurisdiction. Government employers are excluded, with a narrow carve-out for mass transit systems.
For Colorado workers who do fall under the NLRA, the federal framework governs union elections and bargaining. Federal law, however, allows union-security agreements only to the extent state law permits. 29 U.S.C. § 164(b) says nothing in the NLRA authorizes agreements requiring union membership in any state where such agreements are prohibited by state law.5Office of the Law Revision Counsel. 29 USC 164 – Construction of Provisions That cross-reference means the Labor Peace Act’s restrictions on all-union agreements effectively reach NLRA-covered Colorado workers as well. The practical result: whether you are covered by federal or state labor law, you generally cannot be forced into union membership in Colorado without that supermajority vote.
Dues Deductions and Opting Out
Even where a union represents your workplace, your employer cannot pull union dues out of your paycheck unless you have signed a written authorization. That authorization is individual and revocable. You can cancel it at any time with 30 days’ written notice.1Justia. Colorado Code 8-3-108 – What Are Unfair Labor Practices Taking dues from a worker who has not signed, or refusing to honor a timely revocation, is an unfair labor practice by the employer.
Public Employees: A Different Set of Rules
If you work for state or local government in Colorado, the Labor Peace Act does not apply to you, and neither does the NLRA. The question of forced membership or dues is answered instead by the U.S. Constitution. In Janus v. AFSCME, decided in 2018, the Supreme Court held that extracting agency fees from nonconsenting public employees violates the First Amendment.6Justia. Janus v. AFSCME, 585 U.S. (2018) Every public-sector workplace in the country, Colorado included, now operates under right-to-work principles. You cannot be required to pay union dues or fees as a condition of government employment.
Separate Colorado laws give various public workers the right to organize and, in some cases, bargain collectively. The Colorado Partnership for Quality Jobs and Services Act covers state employees.7Colorado Division of Human Resources. Colorado Partnership for Quality Jobs and Services Act The Collective Bargaining by County Employees Act, effective July 2023, extends bargaining rights to county employees in counties with 7,500 or more residents.8Colorado General Assembly. SB22-230 – Collective Bargaining for Counties The Protections for Public Workers Act (SB 23-111), passed in 2023, protects a broader group of public employees from retaliation for organizing or discussing workplace issues, though it does not require their employers to recognize a union or negotiate a contract.9Colorado Department of Labor and Employment. Senate Bill 23-111 – Protections for Public Workers Act None of these laws can require public workers to pay union dues; Janus settled that question nationwide.
What This Means for Union Membership in Colorado
Colorado’s union membership rate sits below the national average. In 2024, 7.7% of the state’s wage and salary workers belonged to a union, up from 6.9% in 2023 but still below the national rate of 9.9%.10U.S. Bureau of Labor Statistics. Union Members in Colorado The supermajority vote requirement for all-union agreements is one reason private-sector density stays lower than in states that allow simple-majority union security clauses: unions can win recognition, but converting that into mandatory membership is a separate, much harder vote.
If you are weighing a job offer or trying to understand a workplace you already work in, the practical takeaway is straightforward. In almost every Colorado workplace, you have the right to decide for yourself whether to join the union and whether to pay dues. The narrow exception is a workplace that has run and won a Labor Peace Act all-union election, which is uncommon. If dues are coming out of your paycheck, you signed something authorizing it, and you can revoke that authorization with 30 days’ written notice.