Retirement Plan Fiduciary Basics

Who is a fiduciary to a 401(k), 403(b), or pension plan, the standard they're held to, and what personal liability really means.

Who is a fiduciary to a 401(k) plan?

Anyone with discretionary authority over a 401(k) plan's management, administration, or assets is a fiduciary — the employer sponsoring the plan, the named plan administrator, investment committee members, and advisers with investment discretion. Function, not title, determines fiduciary status.

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What is the prudent expert standard?

ERISA holds retirement plan fiduciaries to the care, skill, prudence, and diligence of a prudent person familiar with such matters — effectively an expert standard. Fiduciaries who lack expertise are expected to hire it, and prudence is judged by the process, not the outcome.

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What is a settlor decision versus a fiduciary decision?

Settlor decisions are business choices about the plan itself — whether to offer one, benefit levels, matching formulas, amendments, termination — and aren't governed by ERISA's fiduciary duties. Implementing those choices and running the plan are fiduciary functions held to ERISA's standards.

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Put these answers to work

Fiduciary In A Box walks your team through every one of these requirements step by step — documenting decisions, organizing files, and keeping your plan compliant year-round.

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