Union trust funds hold and administer employment-related benefits for workers covered under collective bargaining agreements. Each benefit type typically runs through its own fund.
A worker covered under a collective bargaining agreement generally has contributions flowing into separate funds, for example:
- Health and welfare
- Retirement
- Annuity
- Vacation
- Apprenticeship training
All are governed independently and all are tied to the hours they work for signatory employers.
How They Work
Most union trust funds are Taft-Hartley trusts: multiemployer benefit funds created through collective bargaining and governed jointly by labor and management trustees.
Employers contribute based on an hourly formula tied to covered work. When a union member works for a signatory contractor, the employer pays negotiated wages directly to the worker and makes separate contributions to the applicable benefit funds.
Those contributions follow the worker; if they move to a different signatory employer within the same trade, their benefit coverage moves with them.
This portability is one of the model’s defining features. In industries where workers routinely move between employers, such as:
- Construction
- Hospitality
- Entertainment
- The trades
a single-employer benefits structure would leave significant gaps.
The multiemployer trust fund fills that gap by decoupling benefits from any one employer relationship.
Why It Matters to the Broader Market
Union labor and the trust funds that support it underpin critical sectors of the economy.
The building that gets constructed, the hotel that gets staffed, the public works project that gets completed: all of these depend on labor systems with functioning benefit structures.
Employers gain access to a trained, credentialed workforce with defined contribution obligations. Workers gain benefit continuity across a career that may span dozens of employers.
The cost doesn’t disappear; it’s embedded in project bids, service contracts, and public infrastructure budgets.
Understanding the trust fund structure helps explain:
- How labor costs are allocated
- Why signatory status carries real financial obligations beyond wages alone
A Specialized Compliance Environment
Unions and trust funds operate under a distinct regulatory framework that differs from standard nonprofit or corporate reporting.
Organizations in this space typically face a combination of obligations, including:
- Form 5500 annual reporting for most benefit plans
- Form 990 filing requirements for the union and trust funds
- LM-2 or LM-3 labor organization annual reports with the Department of Labor
- Annual independent audits for each distinct entity
- Considerations around not-for-profit status, unincorporated association treatment, and unrelated business income
- Accounting method elections that affect how contributions and benefit payments are recognized
Each fund files separately, which means a single union with five benefit trusts may be managing five, six, seven, or more distinct audit and reporting timelines simultaneously.
Getting this right requires advisors who understand both:
- The ERISA framework governing the trusts
- The labor law context surrounding the union itself
Work With SingerLewak
SingerLewak works with unions and multiemployer trust funds to navigate these obligations, including:
- Plan audits and Form 5500 preparation
- Tax compliance
- Advisory support
If your organization operates in this space, our team can help you align reporting practices and address the unique demands the industry places on fund administrators and union leadership alike.
If you would like to discuss how the topics covered in this article apply to your organization, please contact our team. We are here to help.
