Title 29 › Chapter 18— EMPLOYEE RETIREMENT INCOME SECURITY PROGRAM › Subchapter I— PROTECTION OF EMPLOYEE BENEFIT RIGHTS › Subtitle Subtitle B— Regulatory Provisions › Part 3— funding › § 1085a
Certain multiemployer defined‑benefit pension plans must keep a special funding account and follow rules about what to charge and credit each year. Every year the account is charged with the plan’s normal cost plus several unpaid liabilities broken into sets of equal yearly payments: unfunded past service liabilities (amortized over 40 years for plans in existence on January 1, 1974, or 30 years for plans that started after January 1, 1974 but before the first plan year after December 31, 2013), plan amendments (15 years), experience losses (5 years), assumption changes (10 years), waived deficiencies and some other items (generally 5 years), and certain older contribution shortfalls (20 years, reflecting rules before August 17, 2006). The account is credited with employer contributions, any amortized gains (with matching shorter periods), waived deficiencies for the year, and certain transfers from an alternative account. The Treasury Secretary may allow combining or offsetting amortizations and may extend an amortization period up to 10 more years in special cases. Asset values must use a reasonable actuarial method that reflects fair market value, assumptions must be reasonable, and plans must check experience and value liabilities at least once a year. Plans that are under 100% funded must make four quarterly installments (due April 15, July 15, October 15, and January 15) equal to 25% each of the required annual payment (the lesser of 90% of the current required amount or 100% of last year’s required amount). If a plan with less than 100% funded current liability misses part of an installment, interest on the shortfall is the greater of 175% of the Federal mid‑term rate for the plan year’s first month or the plan’s interest rate. Large unpaid balances over $1,000,000 can create a lien; the plan must notify the Pension Benefit Guaranty Corporation within 10 days. If a plan’s funded percentage is under 80% at the plan year start, the sponsor must get an actuary certification by day 90 of the plan year and file a written funding restoration plan within 180 days; benefit‑increasing amendments generally cannot take effect while in restoration status unless the sponsor pays the added liability. Key terms (one line each): accumulated funding deficiency — when charges to the funding account exceed its credits (or the alternate account version); current liability — all benefits the plan owes to participants and beneficiaries; funded current liability percentage — the plan’s assets divided by current liability; funded percentage — assets divided by the plan’s funding liability (present value of accrued benefits); unpredictable contingent event benefit — a benefit that only pays if an event other than age, service, pay, death, disability, or a reasonably predictable event happens.
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Labor — Source: USLM XML via OLRC
Legislative History
Reference
Citation
29 U.S.C. § 1085a
Title 29 — Labor
Last Updated
Apr 5, 2026
Release point: 119-73not60