IRS Publication 5139 – IRS Forms, Instructions, Pubs 2026 – In the complex world of employee benefit plans, defined benefit plans offer retirees a predictable income stream based on factors like salary and years of service. However, to ensure these plans remain financially sound, the Internal Revenue Service (IRS) imposes specific funding-based restrictions under Section 436 of the Internal Revenue Code. IRS Publication 5139, titled “Employee Benefit Plans Explanation Number 14 Section 436 Limitations Defined Benefit Plans,” serves as a crucial guide for plan sponsors, administrators, and actuaries navigating these rules. This article breaks down the key elements of Publication 5139, explaining how Section 436 limitations work, their impact on defined benefit plans, and strategies to comply while optimizing SEO keywords like “Section 436 limitations,” “defined benefit plans,” and “AFTAP certification.”
What Is IRS Publication 5139 and Why Does It Matter?
IRS Publication 5139 provides detailed explanations and worksheets to help identify compliance issues with Section 436, which was introduced by the Pension Protection Act of 2006 (PPA ’06) to prevent underfunded defined benefit plans from distributing benefits that could jeopardize their solvency. It applies primarily to single-employer defined benefit plans subject to minimum funding requirements under Section 412, excluding multiemployer plans, governmental plans, and certain church or cooperative plans unless elected otherwise.
The publication includes Worksheet Number 14 (Form 14582) and Deficiency Checksheet 14 (Form 14583), which assist in auditing plan compliance. A “Yes” response on the worksheet generally indicates adherence, while “No” requires further explanation. As of its June 2021 revision, it incorporates updates from laws like the Cooperative and Small Employer Charity Pension Flexibility Act and the CARES Act, ensuring relevance for plan years post-2013. For businesses managing employee benefit plans, understanding these limitations is essential to avoid penalties, maintain tax-qualified status, and protect participants’ retirement security.
Key Definitions in Section 436 Limitations
To grasp Section 436 limitations, it’s vital to understand core terms defined in the regulations (Treas. Reg. ยง1.436-1):
- Adjusted Funding Target Attainment Percentage (AFTAP): This is the plan’s funding ratio, calculated as the value of plan assets (minus certain credit balances) divided by the funding target. It’s the primary metric determining benefit restrictions.
- Prohibited Payments: Includes lump-sum distributions exceeding the present value of a straight-life annuity, purchases of annuities from insurers, or transfers of assets to satisfy benefits.
- Unpredictable Contingent Event Benefits (UCEBs): Benefits triggered by events like plant shutdowns or layoffs, which cannot be paid if they would drop the AFTAP below thresholds.
- Section 436 Measurement Date: The date when limitations are tested, often tied to the plan year or certification dates.
Plans must incorporate these definitions directly from the regulations to ensure accurate application.
Funding-Based Limitations Based on AFTAP Levels
Section 436 imposes escalating restrictions as a plan’s AFTAP declines, aiming to preserve assets for future obligations. Here’s a breakdown:
When AFTAP Is 80% or Higher?
No restrictions apply. Plans can freely amend benefits, pay UCEBs, and distribute prohibited payments, provided other IRS rules are met.
When AFTAP Is Between 60% and 80%?
- Partial Restrictions on Prohibited Payments: Participants can receive up to the lesser of 50% of the benefit’s present value or 100% of the PBGC maximum guarantee. Bifurcation allows splitting benefits into restricted and unrestricted portions.
- No Benefit-Increasing Amendments: Amendments that increase liabilities are barred unless they would keep AFTAP at 80% or higher. Exceptions include automatic increases tied to compensation.
When AFTAP Is Below 60%?
- Full Ban on Prohibited Payments: No lump sums or similar distributions are allowed.
- No UCEBs: Benefits from unpredictable events are prohibited if the event occurs during the plan year and AFTAP is below 60%.
- Freeze on Benefit Accruals: Future accruals stop automatically, and no amendments increasing liabilities are permitted.
Additionally, if the plan sponsor is in bankruptcy, prohibited payments are halted until AFTAP reaches 100%.
Presumptions and AFTAP Certification Requirements
Without a timely AFTAP certification from the plan’s enrolled actuary, presumptions kick in to enforce caution:
- Until certified, the prior year’s AFTAP is presumed.
- By the fourth month of the plan year, if uncertified and prior AFTAP was 60-90%, it’s reduced by 10%.
- By the tenth month, it’s presumed below 60% if still uncertified.
These presumptions trigger “inclusive presumed AFTAP” adjustments for testing UCEBs or amendments. Certifications must be issued promptly to avoid unnecessary restrictions.
Methods to Avoid or Terminate Section 436 Limitations
Plan sponsors can mitigate limitations through:
- Employer Contributions: Additional Section 436 contributions (beyond minimum required) can boost AFTAP. These are treated separately and can terminate restrictions for the year.
- Security Deposits: Providing security like escrow or surety bonds counts toward assets.
- Balance Reductions: Deemed elections to reduce prefunding or carryover balances help reach thresholds.
Once limitations lift, plans may resume accruals prospectively, with options for retroactive restoration if the restriction lasted 12 months or less and post-restoration AFTAP is at least 60%.
Special Rules and Effective Dates for Defined Benefit Plans
- New Plans: Exempt from most limitations for the first five years.
- Frozen Plans: Limitations apply only when benefits resume or increase.
- Multiple Employer Plans: Treated as single-employer unless specified otherwise.
- Effective Date: Generally for plan years after December 31, 2007, with delays for collectively bargained or CSEC plans up to 2017.
The rules reflect final regulations issued October 15, 2009, and incorporate relief from the Pension Relief Act of 2010.
Conclusion: Ensuring Compliance with Section 436 for Sustainable Employee Benefits
IRS Publication 5139 is an indispensable resource for maintaining compliant defined benefit plans under Section 436 limitations. By monitoring AFTAP, certifying funding levels timely, and using contributions strategically, sponsors can avoid restrictions and safeguard employee benefits. For the latest guidance, consult the IRS website or a qualified professional, as rules may evolve. Staying informed on “employee benefit plans” and “defined benefit plan funding” not only ensures SEO visibility but also long-term plan health.