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Unions and collective bargaining in Colombia: forming a union, union leader protection, bargaining, strikes and the suspended sector bargaining decree

Last verified: 2026-10-26 · Status: Changing

Colombian unions need at least 25 members and register by filing their founding minutes; founders and board members are protected from dismissal or demotion without a judge's prior approval. Bargaining is mostly at company level: the employer must start talks within five business days of a list of demands, and if direct talks fail the workers vote on a strike or arbitration; strikes are banned in essential public services. A collective agreement signed by a union with more than a third of the workforce extends to all workers, and the March 2026 decree that tried to make sector wide agreements binding was provisionally suspended by the Consejo de Estado in October 2026.

USD figures use the TRM (tasa representativa del mercado) of COP 3,158.43 per US dollar, valid 24 to 26 October 2026, from the official TRM series published by the Superintendencia Financiera on the national open data portal (datos.gov.co). Conversions are for orientation only.

Key facts

Minimum members to form a workers' union	25 membersCST art. 359, as of 2026-10-26 · in force
Maximum fine per anti union act	100 monthly minimum wagesCST art. 354 (Ley 50 de 1990 art. 39), as of 2026-10-26 · in force
Maximum time to start direct talks after a list of demands	5 business daysCST art. 433, as of 2026-10-26 · in force
Time to vote on strike or arbitration after direct talks	10 business daysCST art. 444, as of 2026-10-26 · in force
Union share of workforce above which a collective agreement extends to all workers	33.3 %CST art. 471, as of 2026-10-26 · in force
Sector level bargaining decree (Decreto 234 de 2026)	provisionally suspended Decreto 234 de 2026, as of 2026-10-26 · pending

The rule

1. Workers and employers have the right to form unions without state intervention; legal recognition follows from registering the founding minutes, and the cancellation or suspension of a union's legal status can only be ordered by a court.Constitución Política de 1991, Art. 39 (Gaceta Constitucional 116 of 20 July 1991), 1991-07-20 official text · verified 2026-10-26

2. A workers' union needs at least 25 members to be formed and to subsist; an employers' union at least five independent employers.Código Sustantivo del Trabajo, Art. 359, 1950-08-05 official text · verified 2026-10-26

3. Anyone who interferes with freedom of association is fined 5 to 100 times the monthly minimum wage each time by the labor authority, without prejudice to criminal liability. Examples include obstructing affiliation with gifts or promises, dismissing or changing conditions because of union founding activities, refusing to negotiate a lawfully presented list of demands, and retaliating against workers who testified.
Cost to do it: Fine of COP 8,754,525 to COP 175,090,500 (US$2,771.80 to US$55,435.93) per infraction in 2026.Código Sustantivo del Trabajo, as amended by Ley 50 de 1990 art. 39, Art. 354, 1990-12-28 official text · verified 2026-10-26

4. Fuero sindical protects founders (from founding until two months after registration, up to six months), members joining before registration, up to five principal and five alternate board members (term plus six months) and two members of the grievance committee: they cannot be dismissed, demoted or transferred without a just cause previously approved by a labor judge. A dismissal without that approval leads to reinstatement and back pay.Código Sustantivo del Trabajo, Art. 405, 406 (Ley 584 de 2000 art. 12) and 408, 2000-06-14 official text · verified 2026-10-26

5. The employer must receive the workers' delegates within 24 hours of a timely list of demands (pliego de peticiones) and start direct settlement talks no later than five business days after it is filed; refusing or evading the talks is fined 5 to 10 monthly minimum wages per day of delay.
Cost to do it: COP 8,754,525 to COP 17,509,050 (US$2,771.80 to US$5,543.59) per day of delay in 2026.Código Sustantivo del Trabajo, as amended by Decreto 2351 de 1965 art. 27 and Ley 11 de 1984 art. 21, Art. 433, 1984-03-05 official text · verified 2026-10-26

6. If direct settlement ends without full agreement, within 10 business days the workers decide by secret, personal vote of an absolute majority (of the company's workers, or of the assembly of the union or unions representing more than half of them) between a strike and an arbitration tribunal. If a strike lasts 60 calendar days without solution, the parties have three business days to agree a mechanism, then a subcommission of the national concertation commission has five business days, after which an arbitration tribunal is convened and work resumes within three business days.Código Sustantivo del Trabajo, as amended by Ley 50 de 1990, Ley 584 de 2000 and Ley 1210 de 2008, Art. 444 and 448 num. 4, 2008-07-14 official text · verified 2026-10-26

7. Strikes are prohibited in public services, defined as organized activities meeting general needs regularly and continuously, including the branches of public power, land, water and air transport, water, electricity and telecommunications, and city hygiene services (several examples in the article were struck down or conditioned by the Constitutional Court).Código Sustantivo del Trabajo (Decreto Ley 2663 de 1950), as amended by Decreto 753 de 1956 (Diario Oficial 29.019), Art. 430, 1950-08-05 official text · verified 2026-10-26

8. When a union party to a collective agreement has more than one third of the company's workers, the agreement extends to all workers, unionized or not. A company where unions group more than a third of the workers may not sign or extend collective pacts (pactos colectivos) with non unionized workers; pacts otherwise bind only those who sign or adhere.Código Sustantivo del Trabajo; Ley 50 de 1990, CST art. 471 and 481 (Ley 50 art. 69); Ley 50 art. 70, 1990-12-28 official text · verified 2026-10-26

9. Decreto 234 de 2026 regulated multi level collective bargaining (group of companies, branch or sector), made sector agreements binding on all employers and workers in the level negotiated and required non unionized beneficiaries to pay the union a fee equal to ordinary dues. The Consejo de Estado provisionally suspended the decree in early October 2026 on the preliminary view that the structure of sector bargaining is reserved to Congress; company level bargaining under the Labor Code is unaffected and the merits ruling is pending.Decreto 234 de 2026 (subrogating chapter 2.2.2.7 of Decreto 1072 de 2015), Decreto 1072 art. 2.2.2.7.1 to 2.2.2.7.11, in particular 2.2.2.7.8 and 2.2.2.7.9, 2026-03-06 official text · verified 2026-10-26 · changed: Decreto 234 de 2026 (6 March 2026, Diario Oficial 53.422 of 9 March 2026) introduced sector level bargaining; provisionally suspended by the Consejo de Estado in October 2026 (suspension reported by the ANDI employers' association on 2 October 2026 and confirmed by the Ministry of Labor; the court order itself was not found on an official site).

10. Union assemblies may now regulate in their bylaws the use of technological means for meetings, along with quorum, debates and voting.Código Sustantivo del Trabajo, as amended by Ley 2466 de 2025, Art. 362 num. 10 (Ley 2466 art. 59), 2025-06-25 official text · verified 2026-10-26

Step	Deadline	Rule
Receive delegates after the list of demands	24 hours	CST art. 433
Start direct settlement talks	Within 5 business days of filing	CST art. 433
Vote on strike or arbitration	Within 10 business days after direct talks end	CST art. 444
Strike without solution	After 60 calendar days: 3 business days to agree, 5 business days of mediation, then arbitration	CST art. 448 num. 4

Company level bargaining timeline under the Labor Code

Worked example

A manufacturer with 300 workers receives a list of demands from a union with 120 members (40 percent). It must meet the delegates within 24 hours and start talks within five business days. Because the union exceeds one third of the workforce, the resulting agreement will cover all 300 workers (CST art. 471), and the company may not sign a parallel collective pact with non members (Ley 50 art. 70).
If the HR director refused to start talks, the Ministry of Labor could fine the company COP 8,754,525 to COP 17,509,050 for each day of delay (CST art. 433).

Step by step

1. Map union membership and fuero holders before any reorganization; transfers or demotions of protected workers need a labor judge's approval.
2. Assign negotiators who can bind the company and meet the CST art. 433 deadlines.
3. Check whether the essential public service strike ban applies to your activity (CST art. 430).
4. Track the Consejo de Estado case on Decreto 234 de 2026 before relying on or resisting any sector level demands.
5. Keep collective pacts only where unions do not represent more than one third of workers.

Common traps

Dismissing a union founder or board member without a court order. It results in reinstatement and back pay (CST art. 408).
Signing a collective pact when the union exceeds one third of the workforce. It is prohibited (Ley 50 art. 70).
Assuming sector agreements bind you. Decreto 234 de 2026 is provisionally suspended; only agreements at company level, or ones you sign, currently bind.
Counting the 60 day strike rule as a lockout right. It triggers mediation and arbitration, not unilateral measures (CST art. 448).

Sources

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