What is a pooled employer plan?
A pooled employer plan, or PEP, lets unrelated businesses join one 401(k) plan run by a professional provider. Here is what that means in practice, and what it does and does not change for an employer.
A pooled employer plan (PEP) is a single 401(k) plan that unrelated employers can join together. It was created by the SECURE Act of 2019, which added section 3(43) to ERISA and section 413(e) to the Internal Revenue Code, and PEPs became available beginning in 2021.
Before PEPs existed, several unrelated small employers generally could not share one retirement plan unless they had some common bond — the same industry, a shared association, a professional employer organization. A PEP removes that requirement. Businesses with nothing in common can participate in the same plan, and the plan is run by one entity called a pooled plan provider.
The short version. In a single-employer 401(k), the business is the plan sponsor and usually the plan administrator: it signs the plan document, files the annual report, and carries the administrative duties. In a pooled employer plan, one professional provider holds the plan administrator role for the whole plan, and the business becomes a participating employer instead of running a plan of its own.
What a pooled plan provider is, and what it must do
A pooled plan provider is not a marketing label. It is a defined role in ERISA section 3(44), and the requirements are specific. Under the Department of Labor's registration rule, a pooled plan provider is a person that:
- is designated by the terms of the plan as a named fiduciary under ERISA, and as the plan administrator;
- is responsible to perform all administrative duties reasonably necessary to ensure that the plan meets the requirements of the Internal Revenue Code;
- acknowledges in writing its status as a named fiduciary and as the plan administrator;
- is responsible for ensuring that all persons who handle plan assets or are plan fiduciaries are bonded; and
- registers as a pooled plan provider with the Secretary of Labor and the Secretary of the Treasury before beginning operations.
That registration is made on Form PR, filed electronically with the Department of Labor's Employee Benefits Security Administration. A single Form PR filing satisfies the registration requirement under both Title I of ERISA and the Internal Revenue Code.
This matters when you are evaluating a plan: a pooled plan provider's Form PR filing is a matter of public record, and the plan's own annual report has to state whether the provider has complied with the Form PR requirement.
PEP compared with a single-employer 401(k)
Both are real 401(k) plans governed by ERISA and the Internal Revenue Code. Employees see a retirement account either way. The differences are structural — they are about who holds which legal role.
| Responsibility | Pooled employer plan | Single-employer 401(k) |
|---|---|---|
| Plan administrator | The pooled plan provider, designated by the plan's terms and acknowledged in writing. | Usually the employer itself. |
| Named fiduciary | The pooled plan provider is a named fiduciary under ERISA. | Usually the employer, or someone the employer appoints. |
| Form 5500 annual report | One Form 5500 is filed for the plan as a whole. Participating employers are listed on an attachment rather than filing separately. Form 5500-SF may not be used. | The employer files its own Form 5500 (or 5500-SF, if eligible) for its own plan. |
| Independent audit | The audit obligation attaches to the plan and is discharged by the plan administrator, not by each participating employer separately. | The employer's own plan is audited once it is a large plan. |
| Selecting and monitoring the provider | Stays with the employer. Plan terms must provide that each employer retains this fiduciary responsibility. | Stays with the employer. |
| Day-to-day administrative work | Performed by the pooled plan provider for every participating employer at once. | Assembled and overseen by the employer, usually across several service providers. |
Whether a plan is a “large plan” for audit purposes turns on participant counts. For defined contribution plans, beginning with the 2023 plan year, that count is based on participants with account balances at the beginning of the plan year, rather than everyone eligible to participate.
What the employer still keeps
This is the part most worth reading twice, because it is easy to assume a pooled plan hands over everything. It does not.
The Department of Labor's rule requires that the plan's terms “provide that each employer in the plan retains fiduciary responsibility for the selection and monitoring, in accordance with ERISA fiduciary requirements, of the person designated as the pooled plan provider” — and of other named fiduciaries, and of the investment management of assets attributable to that employer's own employees.
This is the same boundary that governs any professional administration arrangement — what a 3(16) administrator can and cannot take on covers it in more detail. So choosing a pooled plan provider is itself a fiduciary act, and so is continuing to use one. An employer joining a PEP is not stepping outside ERISA; it is changing which duties it holds. Alongside that, participating employers must take the actions the Department of Labor or the pooled plan provider determines are necessary to administer the plan and keep it compliant — which in practice means supplying accurate payroll and employee data on time, and forwarding contributions.
Who a pooled employer plan tends to suit
A PEP is a structure, not a verdict. It fits some employers well and others poorly.
It tends to suit a business that wants to offer a 401(k) but has no benefits staff to run one; an employer that would rather hold the narrower duty of selecting and monitoring one provider than assemble and oversee several; and a business whose plan is small enough that the fixed administrative work of running a standalone plan weighs heavily relative to its size.
If you are weighing this against setting up your own plan, the four steps to establish a 401(k) sets out what that route involves.
It tends to suit less well an employer that wants a highly customized plan design, one that already has the internal expertise and wants direct control of every decision, or one whose existing arrangement already works and would gain little from restructuring.
Common questions
Is a pooled employer plan the same as a multiple employer plan?
A PEP is a type of multiple employer plan. The distinguishing feature is that a PEP does not require participating employers to share a common industry, association, or other relationship. For annual reporting it is treated as a multiple-employer plan: it checks the multiple-employer box on Form 5500 and cannot file the shorter Form 5500-SF.
Does each employer in a pooled employer plan file its own Form 5500?
No. One Form 5500 is filed for the plan as a whole. It includes an attachment listing each participating employer by name and employer identification number, with a good-faith estimate of each employer's share of total contributions for the year, and it must state whether the pooled plan provider has complied with the Form PR registration requirement.
Does joining a pooled employer plan remove all fiduciary responsibility from the employer?
No — and any description suggesting otherwise is worth questioning. Plan terms must provide that each employer retains fiduciary responsibility for selecting and monitoring the pooled plan provider, in accordance with ERISA fiduciary requirements. What changes is the scope of what the employer holds, not whether it is a fiduciary at all.
Who is allowed to operate a pooled employer plan?
Only a pooled plan provider as defined in ERISA section 3(44), which must register with the Department of Labor and the Treasury Department before beginning operations. Registration is public, so it can be verified rather than taken on trust.
AIPEP 401(k), at aipep401k.com, is a pooled employer plan operated by ThinkNirvana Foundation, a Maryland nonprofit corporation acting as pooled plan provider under ERISA §413(e) (registration in process).
Sources
- U.S. Department of Labor, Employee Benefits Security Administration, Registration Requirements for Pooled Plan Providers, final rule, 85 Fed. Reg. (Nov. 16, 2020) — definitions of pooled employer plan and pooled plan provider, the requirements a pooled plan provider must meet, registration before beginning operations, and the employer's retained duty to select and monitor.
- U.S. Department of Labor, EBSA, Form PR — Registration for Pooled Plan Provider — the registration filing itself and its instructions.
- U.S. Department of Labor, EBSA, Form 5500 Series and instructions — single-filing treatment for pooled employer plans, the participating-employer attachment, the Form PR compliance question, and the bar on using Form 5500-SF.
- U.S. Department of Labor, EBSA, Changes for the 2023 Form 5500 and Form 5500-SF Annual Return/Reports — the participant-counting method for the 100-participant threshold.
- Internal Revenue Service, Form 5500 Corner — annual return/report requirements for retirement plans.