2026 ERISA Fiduciary Update for Pension Fund Trustees

Several 2026 ERISA developments deserve a place on every pension fund trustee’s governance calendar. The consistent lesson is simple: a trustee record needs to show how a material decision was made.

This update explains the Supreme Court’s withdrawal-liability decision, the Department of Labor’s current enforcement direction, and a practical way to document board decisions without confusing trustee elections with investment proxy voting. It is educational information, not legal advice; your trust agreement, plan documents, and counsel control the answer for a particular fund.

What changed for pension fiduciaries in 2026

On May 21, 2026, the U.S. Supreme Court decided M & K Employee Solutions, LLC v. Trustees of the IAM National Pension Fund. The Court held that ERISA does not require a multiemployer plan to select every actuarial assumption used to calculate withdrawal liability on or before the measurement date. The plan data remains fixed as of that date, but predictive assumptions may be selected later, subject to ERISA’s reasonableness and best-estimate standards.

The ruling places a premium on records that show what trustees considered and why. For a board that oversees a multiemployer pension fund election, carry that habit into the election file: preserve the governing authority, approved procedure, exception log, and final certification.

DOL enforcement materials reinforce the point. EBSA Field Assistance Bulletin 2026-01 directs staff toward egregious conduct, significant harm, loyalty breaches, and conflicts while continuing to enforce prudence. The Department also published a proposed rule on designated investment alternatives. It is not a final rule, so confirm the current record before changing policy.

Turn legal developments into a defensible board record

Trustees do not need to turn every meeting into a legal brief. They do need a repeatable record that shows the board acted deliberately. ERISA’s fiduciary standard requires action solely in the interests of participants and beneficiaries, with prudence, care, skill, diligence, and adherence to governing plan documents when consistent with ERISA. That standard is set out in ERISA section 404.

For material decisions, including an election method or a contested eligibility question, use a simple sequence:

1. Identify the authority. Cite the trust agreement, plan document, bylaws, statute, or prior board resolution that governs the decision.


2. Define the question. State the exact decision before the board and the affected class of participants, beneficiaries, or employers.


3. Collect relevant information. Retain adviser materials, voter-roll sources, actuarial analysis, or vendor controls actually considered.


4. Address conflicts. Record recusals, disclosures, and any independent review used to manage a conflict.


5. Make the decision. Capture the vote, rationale, conditions, and any dissent without retroactively polishing the minutes.


6. Document execution. Keep notices, approvals, ballot configurations, system reports, and communications in one indexed file.


7. Close the loop. Record certification, challenge resolution, and any process improvement for the next cycle.

Keep trustee elections separate from investment proxy votes

Pension funds often use the word “vote” for two very different activities. A trustee election selects the people who govern the fund. An investment proxy vote exercises a shareholder right connected to securities held by the plan. Combining the two in a policy, vendor scope, or meeting minute creates avoidable confusion.

For investment proxies, the Department of Labor has explained that shareholder rights attached to ERISA plan shares are plan assets and that their management is subject to fiduciary duties. The agency’s Technical Release 2026-01 is a useful starting point for boards reviewing proxy-adviser relationships. The question is whether the fund’s investment process is prudent and loyal, including the monitoring of any delegated manager or adviser.

Trustee elections raise a separate set of controls: who is eligible, whether a seat is elected or appointed, what the trust agreement requires, how nominations work, and how results are certified. A jointly administered Taft-Hartley plan is typically governed by equal labor and management representation, but selection mechanics still depend on the applicable documents and bargaining context. Votem’s election-operations resources can help teams organize the operational side; counsel should confirm the legal framework before dates or ballot rules are set.

Build an audit-ready governance calendar

The strongest controls are calendar-driven. Before a trustee term ends, assign an owner to review the trust agreement, identify the decision path, and confirm required records. For online, mail, phone, or hybrid voting, approve the voter-record date, ballot rules, notice schedule, accessibility support, and reconciliation steps before the election opens.

Each fund’s retention schedule may add requirements, especially when LMRDA rules, public-plan law, or a collective-bargaining agreement applies. Treat the table as a planning tool, then compare it against your governing documents.

Frequently Asked Questions

Did the M & K decision change every pension fund election?

No. The case concerns actuarial assumptions used in multiemployer-plan withdrawal-liability calculations, not the mechanics of trustee elections. Its practical relevance to election administration is governance discipline: trustees should be able to show the authority, information, and process behind material decisions.

Does ERISA give every trustee election the same notice deadline?

No universal ERISA trustee-election notice deadline applies to every fund. The trust agreement, plan documents, bylaws, and any applicable statute or labor-law requirement determine the procedure. Confirm whether the role is elected, appointed, or subject to rules outside ERISA before issuing a notice.

Can trustees delegate online election administration?

They can engage an election administrator or technology provider, but delegation does not remove the board’s duty to choose and monitor service providers prudently. Establish the approved rules, review access and audit controls, and keep an election file that supports the final certification.

What is the first document a new trustee should read?

Start with the trust agreement and the plan document, then read the bylaws, current delegations, and recent board minutes. Those materials explain the fund’s authority structure far better than a generic election checklist can.

The Bottom Line

2026 has not produced a one-size-fits-all ERISA election rule. It has underscored a more durable point: a fiduciary process should be visible in the record. When trustees can connect a decision to governing authority, relevant information, conflict controls, and a clear certification trail, the fund is better positioned to explain its work to participants, advisers, and regulators.

If your board is planning a trustee election or updating its governance record this year, talk with Votem’s election specialists before you set a deadline or configure a ballot. The conversation can help your team translate its approved procedures into an auditable voting workflow.