A pooled employer plan (PEP) lets unrelated employers join one professionally run 401(k): one plan document, one Form 5500, usually a built-in 3(38) investment manager, and administration handled by a DOL-registered pooled plan provider. You give up design flexibility and take on one duty that never delegates — choosing and monitoring the provider — plus timely payroll deposits. Price one against a standalone quote before deciding; neither wins automatically.
What a PEP is
A pooled employer plan is a single 401(k) that many unrelated employers join together, created by the SECURE Act of 2019 and available since January 2021 (ERISA § 3(43)–(44)). Before PEPs, employers who shared a plan generally needed something in common — an industry association, common ownership. The SECURE Act removed that requirement: a landscaping company, a dental office and a software firm can now sit inside one plan, run by a professional pooled plan provider (PPP) that must register with the Department of Labor and the Treasury (Form PR) before operating.
The pitch is scale. One plan document, one Form 5500, one audit if one is required at all, one fiduciary infrastructure — spread across dozens or hundreds of employers instead of borne by each one alone. For the smallest employers, who pay the steepest per-participant costs in the standalone market, pooling is genuinely interesting arithmetic.
How the roles are divided
| Function | Standalone 401(k) | Pooled employer plan |
|---|---|---|
| Plan document & design | Yours, via your TPA | The PPP's — you pick from its menu of options |
| Named fiduciary / administrator | Usually you | The pooled plan provider |
| Form 5500 filing | One per employer | One for the whole pool |
| Independent audit | Required for larger plans | Generally one pooled audit, cost shared |
| Investment fiduciary | You, or your 3(21)/3(38) | Typically a 3(38) named by the PPP |
| Choosing/monitoring providers | You | You still choose and monitor the PPP itself |
| Timely deposit of deferrals | You | Still you — payroll never delegates |
| Customisation | High | Limited to the PPP's chassis |
Notice the two rows that stay on your side of the table. Joining a PEP outsources a great deal of administration and most investment fiduciary work — but ERISA still leaves the adopting employer responsible for selecting and monitoring the PPP and for the payroll-side duties, above all depositing employee contributions on time. No structure removes those.
What pooling buys you
- Less administration on your desk. The PPP is typically the plan administrator and named fiduciary, absorbing filings, notices and much of the operational work that otherwise lands on an owner or office manager.
- Professional fiduciaries by default. Most PEPs come with a 3(38) investment manager built in — the arrangement explained in our 3(38) guide — rather than as an upgrade you must think to buy.
- Potentially lower cost at small sizes. Pooled recordkeeping and a shared audit can undercut standalone pricing for plans with a handful of participants. "Can," not "must" — the PPP adds its own fee layer, so the comparison has to be run, not assumed.
- Mandate compliance with one signature. A PEP satisfies the CalSavers requirement just as a standalone plan does — see CalSavers vs a 401(k).
What you give up
- Design flexibility. You choose among the options the PPP's document supports — typically the standard safe harbor formulas, match schedules and eligibility settings. If you want an unusual design (new-comparability profit sharing tuned to your census, or a cash balance pairing), a standalone plan serves it better.
- Provider lock-in dynamics. Leaving a PEP means a plan spin-off rather than a simple recordkeeper change. Ask, before joining, what exit looks like and costs.
- Fee opacity risk. Pooling consolidates fees into fewer line items, which can make them harder — not easier — to see. Insist on the 408(b)(2) disclosure and translate it to dollars per participant, exactly as our cost guide walks through.
- The pool's quality is the PPP's quality. Your ongoing duty is monitoring one provider; if that provider is mediocre, everything downstream is.
Who a PEP tends to fit
The natural PEP customer is an employer with roughly 1 to 25 employees who wants a real 401(k) — deferrals well above CalSavers levels, an employer match, possibly a safe harbor design — with as little administration as possible, and whose needs are standard. The natural standalone customer is an employer who wants a tailored design, expects to grow past the point where pooling's savings matter, or simply gets a better standalone quote — which happens more often than the PEP marketing suggests, especially since SECURE 2.0's startup credits offset standalone setup costs.
The honest procedure: get one PEP quote and one standalone safe harbor quote on the same census, put both through the same all-in cost arithmetic, and read who holds each fiduciary role in each. Our cost estimator gives you the framework, and our business plans service runs the comparison with you.
Common questions
Is a PEP the same as a MEP?
Close cousins. A multiple employer plan (MEP) predates the SECURE Act and generally requires a common bond among employers, such as an association. A PEP requires none — any unrelated employers may join, and the plan must be run by a registered pooled plan provider. For most small businesses shopping today, the PEP is the relevant version.
If the PEP handles everything, am I still a fiduciary?
Yes, in two respects that never transfer: prudently selecting and monitoring the pooled plan provider, and the payroll-side duties — above all forwarding employee deferrals promptly. The DOL's guidance on fiduciary responsibilities applies to adopting employers of pooled plans too.
What happens if another employer in the pool breaks the rules?
The statute anticipated this: PEPs operate under rules meant to prevent one employer's compliance failure from disqualifying the plan for everyone (the so-called bad-apple protections). The offending employer bears the consequences of its own failure. Ask the PPP how it handles this in practice.
Can a PEP use a safe harbor design?
Generally yes — most PPP documents offer the standard safe harbor formulas, so an owner can defer the maximum without ADP/ACP testing inside the pool. The available designs are the provider's menu, though; see our safe harbor guide for what to look for, then check the PPP offers it.
Sources
- SECURE Act of 2019, § 101; ERISA §§ 3(43) and 3(44) (pooled employer plans and pooled plan providers)
- U.S. Department of Labor, Registration Requirements for Pooled Plan Providers (Form PR), dol.gov
- IRS, Multiple Employer Plans, irs.gov
- U.S. Department of Labor, Meeting Your Fiduciary Responsibilities, dol.gov/agencies/ebsa
Pricing a PEP against a standalone plan?
Bring the PEP proposal. We'll put it next to a standalone quote on your actual census and show you the all-in numbers side by side.