On April 10, 2026, the streets of Sejong-ro in Seoul were alive with the sound of marching and chanting as members of the Korean Confederation of Trade Unions (KCTU, or 민주노총) rallied to mark the first day of the revised Labor Union Act, commonly known as the Yellow Envelope Law (노란봉투법). The new law is already shaking up the landscape of labor relations in South Korea, with a surge in negotiation demands from subcontractor unions against primary contractors and a rapid move toward what many are calling a ‘multi-negotiation’ structure within workplaces.
The Central Labor Relations Commission revealed that, from March 10 to April 10, 2026, it received a staggering 294 cases related to the employer status of original contractors—a clear sign that unions are eager to test the new boundaries established by the law. Yet, out of 224 processed cases, the vast majority—197—were withdrawn, with only 19 being formally recognized. Of those, 13 cases involved requests for negotiation unit separation, suggesting a cautious but growing trend toward recognizing the distinct needs and bargaining positions of different groups within the same workplace.
Why are so many cases being withdrawn? According to labor experts cited by Ajunews, it’s often a matter of strategy or compromise. Unions may pull back their demands if they believe a favorable resolution is unlikely, or if internal adjustments between unions make a formal complaint unnecessary. The negotiation unit separation system, after all, is designed to allow for separate bargaining when job roles or working conditions differ significantly within a single workplace.
A landmark case came to light on April 9, 2026, when the Gyeongbuk Regional Labor Relations Commission sided with the Construction Workers’ Union, affiliated with KCTU, in their negotiation request against POSCO E&C. This was the first time a primary contractor’s employer status was officially recognized in such a context, setting a precedent that could ripple through other industries. Now, POSCO E&C is required to enter into negotiations with its subcontractor unions—a move that could embolden others to follow suit.
It’s not just the construction sector feeling the effects. Financial call centers and power distribution companies have also seen their own cases of negotiation unit separation, particularly where the gap in working conditions is pronounced. The Labor Relations Commission has tended to acknowledge the employer status of primary contractors especially in matters of industrial safety, noting that in sectors like manufacturing, construction, public institutions, and universities, parent companies often exert substantial control over the working conditions of subcontracted employees, especially regarding health and safety standards.
But with this newfound negotiating power comes a cascade of practical challenges for employers. Companies now face the prospect of conducting simultaneous or sequential negotiations with multiple unions. As Ajunews reports, this could dramatically increase administrative and time costs, drag out the negotiation process, and heighten the risk of strikes. The complexity is especially acute in industries with layered subcontracting structures, such as manufacturing and construction, where the lines of authority and responsibility are already tangled.
“The diversification of negotiation channels not only leads to increased costs due to prolonged bargaining but also triggers ‘competition for clarity’ among unions, which can escalate the risk of strikes and further strain production schedules and delivery commitments,” one labor analyst explained to Ajunews. The fear is that as unions jockey to prove their commitment to members, they may stake out more uncompromising positions—making consensus harder to reach and industrial action more likely.
Government officials are watching closely, but so far, guidance has been limited. While the principle of a single negotiation window remains in place, the government has yet to issue clear, industry-specific guidelines on when and how negotiation units should be separated. This lack of clarity has left companies and unions alike navigating a legal and procedural grey zone, unsure of how the new rules will play out in practice.
Kim Young-hoon, Minister of Employment and Labor, struck a cautious tone: “Since it is still early days for the law’s implementation, there aren’t yet enough accumulated cases to draw firm conclusions about employer status. We are seeing that, in practice, stable negotiation order is being established within the framework set by the law, as parties proceed with negotiations after employer status is confirmed by the Labor Relations Commission.”
Yet, as unions gain ground in negotiating with primary contractors, they are simultaneously grappling with a crisis of their own. As of April 13, 2026, KCTU is facing a serious wage arrears problem stemming from a drop in revenue—caused by unpaid membership fees from its affiliated unions. According to Maeil Labor News, the federation is considering the drastic step of paying only half of April’s wages if the missing dues are not received by April 25. Some affiliated unions have reportedly not paid their fees for up to three months, creating a dire financial shortfall.
The roots of this crisis stretch back to late 2024, when KCTU’s finances began to deteriorate. For a time, the federation was able to rely on reserves that had inadvertently accumulated during the COVID-19 pandemic, when many union activities were suspended. But by the end of 2025, those reserves were depleted, and the federation now faces not only wage arrears but also the prospect of cutting business expenses in 2026.
In an effort to shore up its finances, KCTU decided at its February 2026 general delegate meeting to raise membership fees: by 100 won per member this year, 200 won from 2027, with automatic increases beginning in 2028, and a switch to a rate-based system from 2035. The proposal, however, was contentious. Some delegates argued that declining membership made a fee hike unsustainable, while others worried about the optics of demanding better labor conditions from employers when the federation itself was unable to pay its own workers in full.
“It’s embarrassing to demand negotiations on labor conditions from employer associations when we ourselves are facing wage arrears,” one delegate was quoted as saying in Maeil Labor News. Still, not all affiliates are delinquent. One union that had strongly opposed the fee increase has nonetheless continued to pay dues at the rate set for non-regular workers, while another has gone two months without payment, citing the need to recalculate fees under the new rate system.
This internal financial turmoil adds another layer of complexity to KCTU’s role as a leading force in the country’s labor movement. The federation is now caught between its expanding influence in the workplace—thanks to the Yellow Envelope Law—and the urgent need to stabilize its own house.
As labor relations in South Korea enter a new era, the stakes are high for both unions and employers. The coming months will test whether the new legal framework can deliver on its promise of fairer, more inclusive bargaining—or whether it will sow confusion and conflict on the shop floor and in union headquarters alike. One thing is clear: the story of labor reform in South Korea is far from over.