Department of Labor proposed regulations would allow certain employers (including employer groups or associations) and business owners with no employees to share a single 401(k) plan. This arrangement would transfer administrative and compliance responsibility to the sponsor of the retirement plan under a multiple employer plan, or “MEP.”

In McLain v. Poppell, it was alleged that Dr. Poppell, owner of the Emerald Coast Eye Clinic and trustee of its 401(k) plan with total investment discretion, invested plan assets primarily in VirnetX, a publicly traded company whose principal business was acting as a “patent troll” (a company that acquires patents and uses them primarily to sue other businesses for alleged patent infringement).

We’ve all read about the lawsuits questioning an employer’s 401(k) investment fund selections and related claims of excessive fund costs. And typically a plan’s professional investment advisor (yes – you should have one unless you have an investment professional on staff) meets with company representatives periodically to discuss a detailed report on fund investment performance and any recommended changes in the plan’s investment fund selections. So, your 401(k) plan files bulge with investment-related materials (and they should!). But what about the rest of an employer’s 401(k) responsibilities?

There are judicial decisions holding that a business owner can be personally responsible when the owner has control over company finances and exercises such authority by paying company creditors instead of making required payments to a welfare benefit plan. But a recent decision of the U.S. Court of Appeals for the Ninth Circuit holds that an employer does not become an ERISA fiduciary merely because it breaks its contractual obligations to make welfare plan contributions (see Glazing Health & Welfare Fund v. Lamek).

Your retirement plan may have an outside third party administrator (TPA) to assist with plan administration. However, a TPA typically is not a fiduciary to the plan and does not act as “plan administrator” (that’s usually the employer itself as provided in a typical TPA services agreement). This leaves the employer ultimately responsible for the plan’s compliance with all applicable legal requirements. So, even if your TPA makes a mistake, the employer is likely on the hook for any resulting liability because the TPA’s services agreement usually imposes damage limits and employer indemnities that protect the TPA.

Consider a typical retirement plan sponsored by a private employer. The employer is a fiduciary to the plan along with employees who individually serve as trustees or members of the plan’s investment or retirement committee.

If your organization sponsors a 401(k) or other retirement plan, you or someone in your organization is a fiduciary to that plan. You may have hired a service provider to administer the plan (a third party administrator, or “TPA”), but the buck stops with your organization. This is because the fine print in your TPA’s service agreement says the official “Plan Administrator” is the employer, not the TPA. This means the employer has the ultimate responsibility for the plan’s ERISA compliance.