ERISA Benefits Law Desk ReferenceERISA Benefits Tech, LLC

Part 10 · Chapter 2

Multiemployer Funding, Zone Status, MPRA, and Special Financial Assistance

Law stated as of October 3, 2026 · Multiemployer Plans and Withdrawal Liability

Scope and status

This chapter is written from the employer/contributing-sponsor side — the focus is what a plan's funded condition does to a contributing employer (surcharges, required increases, restrictions, insolvency, and the SFA conditions that reshape withdrawal liability). The SFA program figures and PBGC premium/guarantee inputs change annually — verify before relying on them.

Citations are to primary authority (Code §§431–432; ERISA §305, §§4022A, 4233, 4245, 4261–4262; ARPA §9704–9705; and PBGC regulations at 29 C.F.R. Parts 4233, 4245, 4261, 4262). For the withdrawal-liability consequences, see this Part's withdrawal-liability chapter, and governance/§515 to this Part's governance chapter. Multiemployer plans file Form 5500 and zone-status notices — route filing mechanics to Part 4 (Reporting, Disclosure, Recordkeeping, and Claims).

Sections

The opening sections of Part A are shown in full. The other sections are listed by title; their text is available to subscribers.

Part A — Funding and the PPA Zone System

A1.Multiemployer minimum funding in brief

Part 10, ch. 2, § A1

Multiemployer DB plans fund under §431 (funding standard account, charges/credits, 15-year amortization for post-PPA bases) — a different regime from single-employer §430; the employer's legal obligation, however, is fixed by the CBA and trust documents, and funding deficiencies fall on contributing employers through the §432 zone machinery and, ultimately, the §4971 excise regime as applied to multiemployer plans. Statute: Code §431, §412(b)(1); ERISA §304.

  1. A2Zone status — endangered, critical, critical and decliningSubscribers
  2. A3What critical status does to employersSubscribers
  3. A4Insolvency and the multiemployer guaranteeSubscribers

Part B — MPRA (2014)

  1. B1Benefit suspensions, partition, and mergersSubscribers

Part C — ARPA Special Financial Assistance (SFA)

  1. C1The programSubscribers
  2. C2SFA conditions — what they do to withdrawal liabilitySubscribers

The first Part of each chapter is open to everyone. The remaining sections, with their authority and practice points, are available to subscribers and to clients of ERISA Benefits Law Group, PLLC whose engagement includes access.

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