What Determines Union Strength? 9 Factors That Shape Our Contracts
Updated March 20, 2026
Winning strong contracts doesn’t come down to negotiations alone. Even the best bargaining team can only win what our union has the power to demand. Strong union contracts don’t happen by chance. They are built on power.
Union power is built every day—through our members, our actions, and our ability to stand together.
While many factors play a role, understanding them helps explain what it takes to win more.
1. Union Membership Levels
The number of workers who join the union is one of the most important factors in determining union strength.
Higher membership means:
Greater leverage at the bargaining table
Less ability for employers to divide workers
Stronger industry standards
Lower membership makes it easier for employers to push wages and benefits down.
2. Member Participation
Union strength isn’t just about numbers. It’s also about engagement.
When members stay informed, attend meetings, and support actions, it shows employers that workers are united.
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Find out about meetings and events near you by checking out our events page.
3. How Many Other Workers Locally Are Union
Union strength is also shaped by what is happening in the local labor market.
When more workers in the same city, region, or labor market are union, employers face more pressure to meet higher standards. When fewer local workers are union, companies have more room to argue for lower wages, weaker benefits, or worse working conditions.
In other words, union density in the local area affects what is possible at the bargaining table.
4. Organizing Across the Industry
Employers compare themselves to competitors. When more workers across the industry are union, it raises standards for everyone.
When fewer are union, it creates downward pressure on wages and benefits.
Do you know someone who works at a non-union competitor or a local company that is non-union? Forward them this link.
4. Political and Legislative Environment
Labor laws and public policy shape what unions can do and how much leverage workers have.
Pro-worker laws can make it easier to organize, bargain, and enforce workplace rights. Anti-worker laws can make those fights harder.
5. Ability to Take Collective Action
The ability of workers to act together is a major source of union power.
Circulating petitions, rallys, pickets, flyering the public, strikes and other forms of collective activity can all influence bargaining. Even when those actions are not used, the fact that workers are organized enough to take them matters.
6. Community Support
Support from customers, community members, faith leaders, and local organizations can make a real difference.
When the public stands with workers, it increases pressure on employers and can strengthen the union’s position during negotiations.
8. Employer Finances and Industry Conditions
The financial state of the company and the broader condition of the industry also affect bargaining.
A profitable employer may still try to hold the line, but strong company performance can strengthen the case for better wages and benefits. At the same time, broader industry conditions can shape what employers argue is possible.
7. Employer Structure and Strategy
Some employers operate non-union locations or plan ahead to resist union pressure.
That structure matters. It affects how much pressure the union can apply and why building strength across multiple workplaces is so important.
Conclusion
Union strength is built from many factors, not just one.
Membership, participation, local union density, industry organizing, public support, employer finances, and workplace strategy all shape what workers can win.
The stronger we are across these areas, the better positioned we are to negotiate strong contracts and protect the standards workers deserve.
Call to Action
Want to help build a stronger union?
Stay informed. Get involved. Support your coworkers. And help grow union strength in your workplace and throughout our community.
Because strong contracts are built on strong union power.