ERISA Benefits Law Desk ReferenceERISA Benefits Tech, LLC

Division II · Retirement Plans

Part 11. Multiple-Employer and Small-Employer Arrangements

This Part covers any arrangement in which unrelated employers share a retirement plan, and for small-employer plan selection and operation: multiple employer plans under Code §413(c) (what is tested plan-wide versus employer-by-employer, determination-letter reliance carve-outs, Schedule MEP and ERISA §103(g)); the single-ERISA-plan-or-many question under ERISA §3(5), DOL Advisory Opinion 2012-04A, and the 2019 association retirement plan rule at 29 C.F.R. §2510.3-55; PEO-sponsored plans (Rev. Proc. 2002-21/2003-86, the bona fide PEO route, and why CPEO status does not answer the qualification question); pooled employer plans and pooled plan providers (ERISA §§3(43)-(44), Code §413(e), Form PR registration under 29 C.F.R. §2510.3-44, PPP duties, conflicts, and the participating employer's retained selection-and-monitoring duty); the unified plan ("one bad apple") rule and the §413(e) notice-and-spinoff sequence for participating-employer failures; and the small-employer vehicles — SEPs, SARSEPs, SIMPLE IRA and SIMPLE 401(k) plans, starter 401(k)s, the §45E/§45E(f)/§45T/§45AA credits, the §414A automatic-enrollment mandate and its employer-by-employer application in a MEP/PEP, and State auto-IRA programs.

Chapters

Chapter 1. Multiple Employer Plan Structure, Qualification, and Single-Plan Status

This chapter covers the architecture of a multiple employer plan (MEP): what a MEP is under Code §413(c) and how it differs from a multiemployer plan and from a controlled-group plan; whether the arrangement is one ERISA plan or many; which Code requirements are tested plan-wide and which employer-by-employer; documents, determination letters, and the limits on a participating employer's reliance; Form 5500 and audit consequences; PEO-sponsored arrangements; and 403(b) MEPs.

Law stated as of October 3, 2026

Chapter 2. Pooled Employer Plans, Pooled Plan Providers, and Participating-Employer Duties

This chapter covers the pooled employer plan (PEP) created by the SECURE Act: the statutory conditions a plan must satisfy to be a PEP, who may be a pooled plan provider (PPP) and what a PPP must do, the DOL Form PR registration regime, the fiduciary architecture and what the participating employer still owes after joining, prohibited-transaction and conflict exposure, fees and disclosure, reporting and audit, and exit.

Law stated as of October 3, 2026

Chapter 3. The Unified Plan Rule and Participating-Employer Failures

This chapter covers the "one bad apple" (unified plan) rule for multiple employer plans, the SECURE Act statutory exception at Code §413(e), and the operative sequence by which a plan administrator or pooled plan provider addresses an unresponsive participating employer under the proposed regulations — notices, deadlines, remedial action, employer-initiated spinoff, and the involuntary spinoff-and-distribution endgame.

Law stated as of October 3, 2026

Chapter 4. SEP, SIMPLE, and Small-Employer Plan Arrangements

This chapter covers the small-employer vehicles: SEPs and grandfathered SARSEPs, SIMPLE IRA plans, SIMPLE 401(k) plans, starter 401(k) and safe-harbor deferral-only 403(b) arrangements, the exclusive-plan and transition rules that connect them, the tax credits and the automatic-enrollment mandate that drive small-employer plan decisions, and State auto-IRA programs and their ERISA-preemption posture.

Law stated as of October 3, 2026

Also in this Part

Related Parts